Keysight Models 6811C,

6812C, and 6813C AC Power

Solutions

User’s and
Service Guide
Notices U.S. Government Rights Warranty
The Software is “commercial computer THE MATERIAL CONTAINED IN THIS
Copyright Notice software,” as defined by Federal Acqui- DOCUMENT IS PROVIDED “AS IS,”
sition Regulation (“FAR”) 2.101. Pursu- AND IS SUBJECT TO BEING
© Keysight Technologies 2017-2020 ant to FAR 12.212 and 27.405-3 and CHANGED, WITHOUT NOTICE, IN
No part of this manual may be repro- Department of Defense FAR Supple- FUTURE EDITIONS. FURTHER, TO THE
duced in any form or by any means ment (“DFARS”) 227.7202, the U.S. MAXIMUM EXTENT PERMITTED BY
(including electronic storage and government acquires commercial com- APPLICABLE LAW, KEYSIGHT DIS-
retrieval or translation into a foreign puter software under the same terms CLAIMS ALL WARRANTIES, EITHER
language) without prior agreement and by which the software is customarily EXPRESS OR IMPLIED, WITH REGARD
written consent from Keysight Technol- provided to the public. Accordingly, TO THIS MANUAL AND ANY INFORMA-
ogies as governed by United States and Keysight provides the Software to U.S. TION CONTAINED HEREIN, INCLUD-
international copyright laws. government customers under its stan- ING BUT NOT LIMITED TO THE
dard commercial license, which is IMPLIED WARRANTIES OF MER-
Manual Part Number embodied in its End User License CHANTABILITY AND FITNESS FOR A
06811-90002 Agreement (EULA), a copy of which can PARTICULAR PURPOSE. KEYSIGHT
be found at http://www.keysight.com/ SHALL NOT BE LIABLE FOR ERRORS
Edition find/sweula. The license set forth in the OR FOR INCIDENTAL OR CONSE-
Edition 3, September 2020 EULA represents the exclusive authority QUENTIAL DAMAGES IN CONNECTION
by which the U.S. government may use, WITH THE FURNISHING, USE, OR
Printed in: modify, distribute, or disclose the Soft- PERFORMANCE OF THIS DOCUMENT
ware. The EULA and the license set OR OF ANY INFORMATION CON-
Printed in Malaysia
forth therein, does not require or per- TAINED HEREIN. SHOULD KEYSIGHT
Published by: mit, among other things, that Keysight: AND THE USER HAVE A SEPARATE
(1) Furnish technical information WRITTEN AGREEMENT WITH WAR-
Keysight Technologies related to commercial computer soft- RANTY TERMS COVERING THE MATE-
Bayan Lepas Free Industrial Zone, ware or commercial computer software RIAL IN THIS DOCUMENT THAT
11900 Penang, Malaysia documentation that is not customarily CONFLICT WITH THESE TERMS, THE
provided to the public; or (2) Relinquish WARRANTY TERMS IN THE SEPARATE
Technology Licenses to, or otherwise provide, the govern- AGREEMENT SHALL CONTROL.
The hardware and/or software ment rights in excess of these rights
described in this document are fur- customarily provided to the public to
nished under a license and may be use, modify, reproduce, release, per-
used or copied only in accordance with form, display, or disclose commercial
the terms of such license. computer software or commercial com-
puter software documentation. No
Declaration of Conformity additional government requirements
Declarations of Conformity for this beyond those set forth in the EULA
product and for other Keysight prod- shall apply, except to the extent that
ucts may be downloaded from the those terms, rights, or licenses are
Web. Go to http://www.keysight.com/ explicitly required from all providers of
go/conformity. You can then search by commercial computer software pursu-
product number to find the latest Dec- ant to the FAR and the DFARS and are
laration of Conformity. set forth specifically in writing else-
where in the EULA. Keysight shall be
under no obligation to update, revise or
otherwise modify the Software. With
respect to any technical data as
defined by FAR 2.101, pursuant to FAR
12.211 and 27.404.2 and DFARS
227.7102, the U.S. government
acquires no greater than Limited Rights
as defined in FAR 27.401 or DFAR
227.7103-5 (c), as applicable in any
technical data.

2 Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide
Safety Information

A CAUTION notice denotes a hazard. It calls attention to an operating

CAUTION procedure, practice, or the like that, if not correctly performed or adhered to,
could result in damage to the product or loss of important data. Do not
proceed beyond a CAUTION notice until the indicated conditions are fully
understood and met.
La mention ATTENTION signale un danger. Si la manoeuvre ou la procédure
correspondante n’est pas exécutée correctement, il peut y avoir un risque
d’endommagement de l’appareil ou de perte de données importantes. En
présence de la mention ATTENTION, il convient de ne pas poursuivre tant
que les conditions indiquées n’ont pas été parfaitement comprises et
remplies.

A WARNING notice denotes a hazard. It calls attention to an operating

WARNING procedure, practice, or the like that, if not correctly performed or adhered to,
could result in personal injury or death. Do not proceed beyond a WARNING
notice until the indicated conditions are fully understood and met.

La mention AVERTISSEMENT signale un danger pour la sécurité de

l’opérateur. Si la manoeuvre ou la procédure correspondante n’est pas
exécutée correctement, il peut y avoir un risque grave, voire mortel pour les
personnes. En présence d’une mention AVERTISSEMENT, il convient de
s’interrompre tant que les conditions indiquées n’ont pas été parfaitement
comprises et satisfaites.

Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide 3
Safety Symbols
The following symbols on the instrument and in the documentation indicate
precautions which must be taken to maintain safe operation of the instrument.

Alternating current (AC) On (mains supply)

Caution, risk of danger (refer to this

Caution, risk of electric shock manual for specific Warning or Caution
information)

Protective earth (ground) terminal Frame or chassis (ground) terminal

Terminal for Line conductor on Terminal for Neutral conductor on

permanently installed equipment permanently installed equipment

Standby (supply). Units with this

symbol are not completely
disconnected from ac mains when this
switch is off. To completely disconnect
the unit from ac mains, either
disconnect the power cord or have a
qualified electrician install an external
switch.

4 Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide
Safety Considerations
Read the information below before using this instrument.
This product is a Safety Class 1 instrument, which means it has a protective earth
terminal. That terminal must be connected to earth ground through a power
source equipped with a ground receptacle. Before installation or operation, check
the ac source and review this guide for safety warnings and instructions. Safety
warnings for specific procedures are located at appropriate places in the guide.
The following general safety precautions must be observed during all phases of
operation, service, and repair of this instrument. Failure to comply with these
precautions or with specific warnings elsewhere in this manual violates safety
standards for design, manufacture, and intended use of the instrument. Keysight
Technologies assumes no liability for the customer’s failure to comply with these
requirements.

GENERAL
This product is a Safety Class 1 instrument (provided with a protective earth
terminal). The protective features of this product may be impaired if it is used in a
manner not specified in the operation instructions.
Any LEDs used in this product are Class 1 LEDs as per IEC 60825-1.
This ISM device complies with Canadian ICES/NMB-001. Cet appareil ISM est
conforme à la norme NMB-001 du Canada.

LIMITATION OF WARRANTY
The foregoing warranty shall not apply to defects resulting from improper or
inadequate maintenance by the Customer, Customer-supplied software or
interfacing, unauthorized modification or misuse, operation outside of the
environmental specifications for the product, or improper site preparation and
maintenance. NO OTHER WARRANTY IS EXPRESSED OR IMPLIED. KEYSIGHT
TECHNOLOGIES SPECIFICALLY DISCLAIMS THE IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.

Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide 5
 BEFORE APPLYING POWER
WARNING
Verify that the product is set to match the available line voltage, the correct
fuse is installed, and all safety precautions are taken. Note the instrument's
external markings described under “Safety Symbols” on page 4.
AVANT LA MISE SOUS TENSION
Vérifiez que le produit est réglé pour correspondre à la tension secteur
disponible, que le fusible adéquat est installé et que toutes les précautions
de sécurité sont respectées. Consultez les marquages externes de
l’instrument décrits sous “Safety Symbols” à la page 4.

GROUND THE INSTRUMENT

WARNING
To minimize shock hazard, the instrument chassis and cover must be
connected to an electrical ground. The instrument must be connected to the
ac power mains through a grounded power cable, with the ground wire firmly
connected to an electrical ground (safety ground) at the power outlet. Any
interruption of the protective (grounding) conductor or disconnection of the
protective earth terminal will cause a potential shock hazard that could
result in personal injury.
MISE À LA TERRE DE L’INSTRUMENT
Pour réduire le risque de choc électrique au minimum, le châssis et le
couvercle de l’instrument doivent être connectés à la terre. L’instrument doit
être connecté au réseau électrique alternatif par le biais d’un câble
d’alimentation relié à la terre, le fil de terre fermement connecté dans une
terre électrique (masse de sécurité) au niveau de la prise de courant. Toute
interruption du conducteur protecteur (de mise à la terre) ou déconnexion
de la borne de terre de protection entraînera un risque de choc électrique
pouvant entraîner des blessures corporelles.

Un circuit de terre continu est essentiel en vue du fonctionnement

sécuritaire de l’appareil. Ne jamais mettre l’appareil en marche lorsque le
conducteur de mise … la terre est débranché‚.

6 Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide
 DO NOT OPERATE IN AN EXPLOSIVE ATMOSPHERE
WARNING
Do not operate the instrument in the presence of flammable gases or fumes.
NE PAS FAIRE FONCTIONNER DANS UNE ATMOSPHÈRE EXPLOSIVE
Ne faites pas fonctionner l’instrument en présence de fumées ou de gaz
inflammables.

DO NOT REMOVE THE INSTRUMENT COVER

WARNING
Operating personnel must not remove instrument covers. Component
replacement and internal adjustments must be made only by qualified
service personnel.
NE PAS RETIRER LE COUVERCLE DE L’INSTRUMENT
Le personnel d’exploitation ne doit pas retirer les couvercles de l’instrument.
Le remplacement des composants et les réglages internes doivent être
uniquement effectués par du personnel de service qualifié.

IN CASE OF DAMAGE
WARNING
Instruments that appear damaged or defective should be made inoperative
and secured against unintended operation until they can be repaired by
qualified service personnel.
EN CAS DE DOMMAGES
Les instruments endommagés ou défectueux doivent être désactivés et
protégés contre toute utilisation involontaire jusqu’à ce qu’ils aient été
réparés par une personne qualifiée.

Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide 7
 LETHAL VOLTAGES
WARNING
AC Sources can supply 425 V peak at their output. DEATH on contact may
result if the output terminals or circuits connected to the output are touched
when power is applied. Hazardous voltages can remain active inside the unit
even after it has been turned off. If the internal LED's are on, hazardous
voltages are present.

TENSIONS MORTELLES

Source AC peuvent fournir 425 V maximum à leur sortie. Tout contact peut
entraîner la MORT si les circuits ou bornes de sorties connectés à la sortie
sont touchés lorsqu’ils sont sous tension. Des tensions dangereuses peuvent
rester actives à l’intérieur de l’unité, même après l’avoir mise hors tension. Si
les DEL internes sont allumées, des tensions dangereuses sont présentes.

ENVIRONMENTAL CONDITIONS
CAUTION
This instrument is intended for indoor use in an installation category II,
pollution degree 2 environment. It is designed to operate at a maximum
relative humidity of 85% and at altitudes of up to 2000 meters. Refer to the
specifications tables for the ac mains voltage requirements and ambient
operating temperature range.
CONDITIONS ENVIRONNEMENTALES
Cet instrument est destiné à une utilisation en intérieur dans un
environnement d’installation de catégorie II, degré de pollution 2. Il est
conçu pour fonctionner dans une humidité relative maximale de 85 % et à
jusqu’à 2000 mètres d’altitude. Consultez les tableaux de spécifications pour
connaître les exigences en matière de tension secteur alternative et de plage
de température de fonctionnement ambiante.

8 Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide
 FUSES
CAUTION
Only fuses with the required rated current, voltage, and specified type
(normal blow, time delay, etc.) should be used. Do not use repaired fuses or
short-circuited fuseholders. To do so could cause a shock or fire hazard.
FUSIBLES
Seuls des fusibles délivrant la tension nominale et le courant nominal requis
et ayant le type spécifié (à action normale, à action retardée et autres)
doivent être utilisés. N’utilisez pas de fusibles réparés ou de porte-fusibles
court-circuités. Vous pourriez provoquer un choc ou un risque d’incendie.

Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide 9
Environmental Conditions
The Models 6811C, 6812C, and 6813C is designed for indoor use and in an
CAUTION area with low condensation. The table below shows the general
environmental requirements for this instrument.

Environmental condition Requirement

Operating condition
– 0 °C to 40 °C
Temperature
Storage condition
– 40 °C to 70 °C
Operating condition
– Up to 85% RH at 40°C (non-condensing)
Humidity
Storage condition
– Up to 95% RH at 40°C (non-condensing)
Altitude Up to 2000 m
Pollution degree 2

Ce Modèles 6811C, 6812C et 6813C est conçu pour être utilisé dans des
locaux fermés où la condensation est faible. Le tableau ci-dessous indique
les conditions d’environnement générales requises pour cet instrument.

Condition d’environnement Exigences

Conditions de fonctionnement
– Entre 0°C et 40 °C
Température
Conditions de stockage
– 40 °C à 70 °C
Conditions de fonctionnement
– Jusqu'à 85% d'humidité relative à 40 °C (sans condensation)
Humidité
Conditions de stockage
– Jusqu'à 95% d'humidité relative à 40 °C (sans condensation)
Altitude Jusqu’à 2 000 m
Degré de pollution 2

10 Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide
Regulatory Information
The Models 6811C, 6812C, and 6813C AC Power Solutions complies with
CAUTION the following safety and Electromagnetic Compatibility (EMC) compliances:
Safety compliance
– IEC 61010-1:2010/ EN 61010-1:2010
– Canada: CAN/CSA-C22.2 No. 61010-1-12
– USA: UL 61010 Issue:2012/05/11 Ed:3
EMC compliance
– IEC 61326-1:2012 / EN 61326-1:2013
– Canada: ICES/NMB-001
– Australia/New Zealand: AS/NZS CISPR 11:2011
– South Korea RRA Notice 2016-24
Le Models 6811C, 6812C, and 6813C AC Power Solutions est conforme aux
normes de sécurité et aux normes EMC suivantes :
Conformité de sécurité
– CEI 61010-1:2010/ EN 61010-1:2010
– Canada : CAN/CSA-C22.2 No. 61010-1-12
– Etats-Unis : UL 61010 Publication :2012/05/11 Ed :3
Conformité CEM
– CEI 61326-1:2012/ EN 61326-1:2013
– Canada : ICES/NMB-001
– Australie/Nouvelle Zélande : AS/NZS CISPR11:2011
– Corée du Sud RRA Notification 2016-24

Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide 11
Regulatory Markings

The CE mark is a registered trademark

of the European Community. This CE
mark shows that the product complies
with all the relevant European Legal
Directives.
ICES/NMB-001 indicates that this ISM The CSA mark is a registered
device complies with the trademark of the Canadian
Canadian ICES-001. Standards Association.
Cet appareil ISM est conforme a la
norme NMB-001 du Canada.
ISM GRP.1 Class A indicates that this
is an Industrial Scientific and Medical
Group 1 Class A product.
This symbol is a South Korean Class A
EMC Declaration. This is a Class A The RCM mark is a registered
instrument suitable for professional trademark of the Australian
use and in electromagnetic Communications and Media Authority.
environment outside of the home.
This symbol indicates the time period This instrument complies with the
during which no hazardous or toxic WEEE Directive (2002/96/EC) marking
substance elements are expected to requirement. This affixed product label
leak or deteriorate during normal use. indicates that you must not discard
Forty years is the expected useful life this electrical or electronic product in
of the product. domestic household waste.

12 Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide
South Korean Class A EMC declaration:

Information to the user

This equipment has been conformity assessed for use in business environments. In a residential
environment this equipment may cause radio interference.

– This EMC statement applies to the equipment only for use in business
environment.

‫߄࢒ࡅۉ‬έ‫ה‬
ࢇ̛̛Е߶‫ࡈה‬୚ˁ߾۰‫ࡈی‬ଟּࢶࡳԻࢶଢ‫۽‬ૡɼձ؇ࡵ̛̛Ի۰ɼ
ࢽࡈ୚ˁ߾۰‫ࡈی‬ଜЕˁࡉࢷળɾ‫ࡉࢂۺ‬Ԯɼ࢑‫ݡ‬ТЬ 

ė ‫߇࢕ࡈی‬ΰ‫ࡵח‬ę ߶‫ ࢢ࢕̛ݦ੼ܞ؏ࡈה‬Ě ߾փࢶࡈଞЬ 

Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide 13
Waste Electrical and Electronic Equipment (WEEE) Directive
This instrument complies with the WEEE Directive marking requirement. This
affixed product label indicates that you must not discard this electrical or
electronic product in domestic household waste.

Product category:
With reference to the equipment types in the WEEE directive Annex 1, this
instrument is classified as a “Monitoring and Control Instrument” product.
The affixed product label is as shown below.

Do not dispose in domestic household waste.

To return this unwanted instrument, contact your nearest Keysight Service Center,
or visit http://about.keysight.com/en/companyinfo/environment/takeback.shtml
for more information.

Sales and Technical Support

To contact Keysight for sales and technical support, refer to the support links on
the following Keysight websites:
– www.keysight.com/find/6800
(product-specific information and support, software and
documentation updates)
– www.keysight.com/find/assist
(worldwide contact information for repair and service)

14 Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide
Table of Contents

Safety Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Safety Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Safety Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Environmental Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Regulatory Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
Regulatory Markings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
South Korean Class A EMC declaration: . . . . . . . . . . . . . . . . . . . . . . . .13
Waste Electrical and Electronic Equipment (WEEE) Directive . . . . . . .14
Product category: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
Sales and Technical Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14

1 General Information
Document Orientation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
Options and parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29
Front Panel with Remote Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . .31
Steady-state Output Characteristic . . . . . . . . . . . . . . . . . . . . . . . . . . . .32
Peak Current or Dynamic Power Capability . . . . . . . . . . . . . . . . . . . . . .33
Peak current limit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33
Peak inrush example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34
RMS Current Limit Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36
Voltage Regulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37
Real time regulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37
RMS regulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37
Output Impedance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38
Output Coupling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40

2 Installation
Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42

Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide 15
 Damage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Packaging material . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Items supplied . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Bench operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Rack mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Input Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Input source and line fuse . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Installing the power cord . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Output Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Wire considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Current ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Voltage drops . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Remote Sense Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Remote sensing and overvoltage protection (OVP) considerations . 53
Trigger Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
Digital Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Controller Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
GPIB connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
RS-232 interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
RS-232 data format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
RS-232 connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
Hardware handshake . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
Response data terminator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60

3 Turn-On Checkout
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
Preliminary Checkout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
Using the Keypad . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
Checkout Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
In Case of Trouble . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
Error messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69

16 Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide
 Start-up errors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .69
Self-test errors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .70
Runtime error messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .71

4 Front Panel Operation

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .74
Front Panel Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .75
System Keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .78
Function Keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .81
Immediate action keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .81
Scrolling keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .82
LAN control keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .83
Meter display keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .85
Output control keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .87
Protection and status control keys . . . . . . . . . . . . . . . . . . . . . . . . . .94
Trigger and list control keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .95
Entry Keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .99
Examples of Front Panel Programming . . . . . . . . . . . . . . . . . . . . . . . .101
Setting the output voltage amplitude . . . . . . . . . . . . . . . . . . . . . . .102
Setting the output frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . .103
Setting the DC offset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .104
Setting a protection feature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .106
Clearing protection conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . .107
Generating step, pulse, and list transients . . . . . . . . . . . . . . . . . . .110
Programming trigger delays and phase synchronization . . . . . . . .117
Using slew rates to generate waveforms . . . . . . . . . . . . . . . . . . . .119
Measuring peak inrush current . . . . . . . . . . . . . . . . . . . . . . . . . . . .122
Setting the GPIB address and RS-232 parameters . . . . . . . . . . . .125
Saving and recalling operating states . . . . . . . . . . . . . . . . . . . . . . .126
Accessing the ac source information . . . . . . . . . . . . . . . . . . . . . . .128
Setting the LAN interface and accessing the LAN information . . .129
Performing LAN reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .131

5 Remote Control and Firmware Update

Remote Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .134

Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide 17
 Keysight IO Libraries Suite . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 134
6811C/6812C/6813C Web interface . . . . . . . . . . . . . . . . . . . . . . . 134
Special Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 137
Using Telnet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 137
Using Sockets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 138
Basic Firmware Update Utility Instructions for Keysight 681XC Series . .
139
Installation procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 140
Troubleshooting firmware update error . . . . . . . . . . . . . . . . . . . . . 146

A Specifications

B Verification and Calibration

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 154
Equipment required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 155
Test setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 156
Performing the Verification Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 157
Turn-on checkout procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 157
AC voltage programming and measurement accuracy . . . . . . . . . 157
DC voltage programming and measurement accuracy . . . . . . . . . 159
RMS current accuracy test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 160
Performing the Calibration Procedure . . . . . . . . . . . . . . . . . . . . . . . . . 164
Front panel calibration menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 165
Front Panel Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 166
Enable calibration mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 166
Calibrating and entering voltage offset values . . . . . . . . . . . . . . . . 167
Calibrating and entering DC voltage gain values . . . . . . . . . . . . . . 168
Calibrating and entering AC rms voltage gain values . . . . . . . . . . 169
Calibrating the OVP trip point . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 171
Calibrating and entering rms current values . . . . . . . . . . . . . . . . . 171
Calibrating and entering rms current measurement values . . . . . 172
Calibrating the output impedance . . . . . . . . . . . . . . . . . . . . . . . . . 173
Saving the calibration constants . . . . . . . . . . . . . . . . . . . . . . . . . . . 173
Changing the Calibration Password . . . . . . . . . . . . . . . . . . . . . . . . . . 174

18 Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide
 Calibration Error Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .175
Calibration Over the GPIB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .176

C Error Messages
Error Number List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .178

D Option 019
2000 VA Output Capability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .186
Specifications for Option 019 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .187

E Option 020
Keysight Dual Power Analyzer Description . . . . . . . . . . . . . . . . . . . . .190
Front Panel Menus - Additions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .192
Rear Panel Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .193
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .194
External shunt line and load connections . . . . . . . . . . . . . . . . . . . .196
Check the external current shunt setting . . . . . . . . . . . . . . . . . . . .199
Front Panel Programming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .201
Setting the output frequency modulation . . . . . . . . . . . . . . . . . . . .201
Using the front panel display with the Power Analyzer input . . . . .202
Making Power Analyzer input measurements . . . . . . . . . . . . . . . . .202
Power Analyzer Input Specifications . . . . . . . . . . . . . . . . . . . . . . . . . .205
Verification and calibration for Option 020 . . . . . . . . . . . . . . . . . . .208
Equipment Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .208
Verification Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .209
Test setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .210
Power Analyzer voltage measurement accuracy . . . . . . . . . . . . . .211
Power Analyzer current measurement accuracy . . . . . . . . . . . . . .212
Calibration Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .213
Summary of front panel calibration menu . . . . . . . . . . . . . . . . . . .214
Enable calibration mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .215
Calibrating and entering Power Analyzer voltage calibration values . .
215

Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide 19
 Calibrating and entering Power Analyzer current calibration values ..
216

F Option 026
Auxiliary Output Capability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 220
Front Panel Menus - Additions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 221
Rear Panel Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 222
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 222
Front Panel Programming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 223
Setting the auxiliary output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 223
Auxiliary Output Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 224
Calibration Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 225
Equipment Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 226
Summary of Front Panel Calibration Menu . . . . . . . . . . . . . . . . . . 227
Enable calibration mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 228
Calibrating the auxiliary output voltage . . . . . . . . . . . . . . . . . . . . . 228
Calibrating the auxiliary output phase . . . . . . . . . . . . . . . . . . . . . . 229

G Line Voltage Conversion

Line Voltage Conversion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 234
Open the unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 234
Check the jumper wire (Model 6811C/6812C only) . . . . . . . . . . . . 235
Check the two rocker switches (all Models) . . . . . . . . . . . . . . . . . . 235
Check the power transformer connector (all Models) . . . . . . . . . . 235
Close the unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 236

20 Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide
List of Figures

Figure 1-1 AC source functional elements . . . . . . . . . . . . . . . . . .29

Figure 1-2 Steady-state output characteristic (in real-time mode) .
32
Figure 1-3 Peak inrush current example . . . . . . . . . . . . . . . . . . . .35
Figure 2-1 Outline diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .45
Figure 2-2 Connecting the power cord (6811C) . . . . . . . . . . . . . .47
Figure 2-3 Connecting the power cord (6812C and 6813C) . . . . .48
Figure 2-4 Output connections . . . . . . . . . . . . . . . . . . . . . . . . . . .49
Figure 2-5 Output connections safety cover . . . . . . . . . . . . . . . . .49
Figure 2-6 Remote sense connections . . . . . . . . . . . . . . . . . . . . .53
Figure 2-7 FLT/INH examples . . . . . . . . . . . . . . . . . . . . . . . . . . . .56
Figure 2-8 Null modem interface lines . . . . . . . . . . . . . . . . . . . . .60
Figure 3-1 Verification connections . . . . . . . . . . . . . . . . . . . . . . . .66
Figure 4-1 Front panel - overall view . . . . . . . . . . . . . . . . . . . . . .75
Figure 4-2 System keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .78
Figure 4-3 Function keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .81
Figure 4-4 Entry Keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .99
Figure 4-5 Pulse transients . . . . . . . . . . . . . . . . . . . . . . . . . . . . .112
Figure 4-6 List transients . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .114
Figure 4-7 Trigger delays and phase synchronization . . . . . . . .117
Figure 4-8 Programming slew rates . . . . . . . . . . . . . . . . . . . . . .119
Figure 5-1 Connect ac power source to simulated front panel .135
Figure 5-2 Soft front panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .136
Figure 5-3 Keysight Basic Firmware Update Utility . . . . . . . . . .140
Figure 5-4 Keysight Basic Firmware Update Utility . . . . . . . . . .141
Figure 5-5 Check description . . . . . . . . . . . . . . . . . . . . . . . . . . . .142
Figure 5-6 Update the interface to perform update . . . . . . . . . .143
Figure 5-7 Begin update after verifying information . . . . . . . . . .144
Figure 5-8 Successfully updated firmware . . . . . . . . . . . . . . . . .145
Figure 5-9 Firmware update failed . . . . . . . . . . . . . . . . . . . . . . .146
Figure 5-10 Recover corrupted firmware (USB only) . . . . . . . . . .147
Figure 5-11 Begin update after verifying information from recovery of
corrupted firmware . . . . . . . . . . . . . . . . . . . . . . . .148
Figure 5-12 Enter boot loader using the ac source . . . . . . . . . . . .148

Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide 21
 Figure 5-13 After entering boot loader, click OK . . . . . . . . . . . . . 149
Figure 5-14 Successfully updated firmware from troubleshooting . .
150
Figure B-1 Verification and calibration test setup . . . . . . . . . . . 156
Figure E-1 Option 020 Typical Connections . . . . . . . . . . . . . . . . 191
Figure E-2 Rear panel - overall view . . . . . . . . . . . . . . . . . . . . . . 193
Figure E-3 Measurement cable connections . . . . . . . . . . . . . . . 195
Figure E-4 Line connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . 197
Figure E-5 Shunt box connection orientation . . . . . . . . . . . . . . . 198
Figure E-6 Verification/Calibration test setup . . . . . . . . . . . . . . 210
Figure F-1 Rear panel - overall view . . . . . . . . . . . . . . . . . . . . . . 222
Figure G-1 Line voltage conversion components . . . . . . . . . . . . 237

22 Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide
List of Tables

Table 1-1 Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26

Table 1-2 Operator replaceable parts . . . . . . . . . . . . . . . . . . . . .28
Table 1-3 Typical peak current output capacities . . . . . . . . . . . .34
Table 1-4 Recommended Ipeak settings as a function of loop
capacitance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35
Table 2-1 Ampacity and resistance of stranded copper conductors
51
Table 2-2 RS-232 connector . . . . . . . . . . . . . . . . . . . . . . . . . . . .58
Table 3-1 Power-on start-up errors . . . . . . . . . . . . . . . . . . . . . . .69
Table 3-2 Power-on self-test errors . . . . . . . . . . . . . . . . . . . . . . .70
Table 4-1 Protection condition description, bit number, and
weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .107
Table 4-2 Protection condition causes . . . . . . . . . . . . . . . . . . . .108
Table B-1 Equipment required . . . . . . . . . . . . . . . . . . . . . . . . . .155
Table B-2 Keysight 6811C verification test record . . . . . . . . . . .161
Table B-3 Keysight 6812C verification test record . . . . . . . . . . .162
Table B-4 Keysight 6813C verification test record . . . . . . . . . . .163
Table B-5 GPIB calibration error messages . . . . . . . . . . . . . . . .175
Table C-1 Error numbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .178
Table D-1 Performance specifications . . . . . . . . . . . . . . . . . . . .187
Table D-2 Supplemental characteristics . . . . . . . . . . . . . . . . . .188
Table E-1 Performance specifications . . . . . . . . . . . . . . . . . . . .205
Table E-2 Supplemental characteristics . . . . . . . . . . . . . . . . . .207
Table E-3 Equipment required for option 020 . . . . . . . . . . . . . .209
Table F-1 Performance specifications . . . . . . . . . . . . . . . . . . . .224
Table F-2 Supplemental characteristics . . . . . . . . . . . . . . . . . .224
Table F-3 Equipment required . . . . . . . . . . . . . . . . . . . . . . . . . .226

Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide 23
 THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK.

24 Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide
 Keysight Models 6811C, 6812C, and 6813C AC Power Solutions
User’s and Service Guide

1 General Information
Document Orientation 26
Description 29
Front Panel with Remote Operation 31
Steady-state Output Characteristic 32
Peak Current or Dynamic Power Capability 33
RMS Current Limit Circuit 36
Voltage Regulation 37
Output Impedance 38
Output Coupling 40

25
1 General Information

Document Orientation
This manual describes the operation of the Keysight Models 6811C, 6812C, and
6813C AC Power Solutions. These units will be referred to as “ac sources”
throughout this manual.

Options and parts

Table 1-1 Options

Option Model Description

1CM[a] All Rack mount kit (Keysight p/n 5063-1564)

1CP[a] All Rack mount kit with handles (Keysight p/n 5063-1575)

100 Keysight 6811C/6812C 100 Vac (±10%), 50/60 Hz (Japan only)

120 Keysight 6811C/6812C 120 Vac (±10%), 50/60 Hz[b]

200 Keysight 6813C 200 Vac (±10%), 50/60 Hz (Japan only)

230 Keysight 6811C/6812C 230 Vac (±10%), 50/60 Hz

831 Keysight 6812C/6813C 12 AWG, 200 to 240 Vac, unterminated

832 Keysight 6813C 4-mm2 wire size, unterminated

833 Keysight 6812C 1.5-mm2 wire size, 200 to 240 Vac, unterminated
834 Keysight 6812C 10 AWG, 100 to 120 Vac, unterminated
841 Keysight 6812C/6813C Line cord with NEMA 6-20P; 20A, 250 V plug

842 Keysight 6813C Line cord with IEC 309; 32A, 220 V plug

844 Keysight 6813C Line cord with NEMA 6-30P; 30A, 250 V locking plug

845 Keysight 6812C Line cord with IEC 309; 16 A, 220 V plug
846 Keysight 6812C Line cord with NEMA L5-30P; 30 A, 120 V plug
847 Keysight 6812C Line cord with CEE 7/7; 16 A, 220 V plug
848 Keysight 6812C Line cord with BS 546; 15 A, 240 V plug
900 Keysight 6811C Line cord with BS 1363/A (90 deg); 10 A, 240 V plug

26 Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide
 General Information 1

Table 1-1 Options (continued)

Option Model Description
901 Keysight 6811C Line cord with AS 3112 (straight); 10 A, 240 V plug

902 Keysight 6811C Line cord with CEE 7/7 (straight); 10 A, 230 V plug

903 Keysight 6811C Line cord with NEMA 5-15P (straight); 13 A, 120 V plug

904 Keysight 6811C Line cord with NEMA 6-15P (straight); 10 A, 230 V plug

906 Keysight 6811C Line cord with SEV Type 12; 10 A, 220/230 V plug

912 Keysight 6811C Line cord with SR107-2-D (straight); 10 A, 220/230 V plug

917 Keysight 6811C Line cord with SABS 164-1 (90 deg); 10 A, 220-250 V plug

918 Keysight 6811C Line cord with JIS 8303 (straight); 12 A, 100/110 V plug

919 Keysight 6811C Line cord with SI 32 (90 deg); 10 A, 220 V plug

920 Keysight 6811C Line cord with IRAM 2073 (90 deg); 10 A, 220 V plug

921 Keysight 6811C Line cord with CEI 23-16; 10 A, 220 V plug

922 Keysight 6811C Line cord with GB 1002 (straight); 10 A, 220 V plug

927 Keysight 6811C Line cord with NEMA 5-15P; 10 A, 220 V plug

[a] Support rails (Keysight p/n 1494-0059) are required when rack mounting units with options 1CM and 1CP.
[b] Default factory settings.

Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide 27
1 General Information

Table 1-2 Operator replaceable parts

Item Keysight part number
Power cord assembly see “Options” on page 26
Rack mount kit see “Options” on page 26
4-terminal digital connector plug 1252-1488
AC input safety cover (with strain relief and bushing) 5040-1751
Screw (3), ac input barrier block (6-32 × 5/16 in) N/A
AC output safety cover 0360-2191
Screw (2), ac output safety cover (m4 × 0.7 in) 0515-0053
Screw (5), ac output barrier block (6-32 × 5/16 in) N/A
User's Guide (this manual) 06811-90002
Programming Guide 06811-90005
Quick Start Guide 06811-90004
Finding Product Manuals - Quick Guide 9320-6794

28 Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide
 General Information 1

Description
The ac source combines three instruments in one unit as shown in the following
figure. The waveform generator produces waveforms with programmable
amplitude, frequency, and shape. The bipolar amplifier amplifies the waveform
generator signal to produce the ac power for your application. The measurement
functions range from a simple readback of rms voltage and current, to
sophisticated capabilities such as waveform analysis.

Figure 1-1 AC source functional elements

The following are the ac sources described in this User's Guide:

Model Description
Keysight 6811C 0-300 Vrms; 375 VA (425 Vpeak; 40 Apeak)

Keysight 6812C 0-300 Vrms; 750 VA (425 Vpeak; 40 Apeak)

Keysight 6813C 0-300 Vrms; 1750 VA (425 Vpeak; 80 Apeak)

Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide 29
1 General Information

Features of the ac source

– Programmable AC voltage, DC voltage, frequency, phase, and current limit.
– Sine, square, clipped sine, and user-definable waveforms.
– Programmable output impedance.
– Voltage and frequency slew control.
– Synthesized waveform generation for high resolution and accuracy in
frequency, low waveform distortion, and glitch-free phase transitions.
– Step and pulse output transients for generating surge, sag, dropout, and other
line disturbance simulations.
– Nonvolatile list programming for generating complex output transients or test
sequences.
– Nonvolatile state and waveform storage and recall.
– Extensive measurement capability:
– AC rms, DC, AC+DC voltage and current and peak current.
– Real, reactive, and apparent power.
– Harmonic analysis of voltage and current waveforms gives amplitude,
phase, and total harmonic distortion results up to the 50th harmonic.
– Triggered acquisition of digitized voltage and current with extensive
post-acquisition calculations.
– 16-bit resolution measurements.
– Trigger in and trigger out for synchronizing transient events or measurements
with external signals.
– Front panel control with 14-character vacuum fluorescent display, keypad, and
rotary pulse generators for voltage and frequency settings.
– Built-in GPIB, RS-232, LAN, and USB interface programming with SCPI
command language.
– Overvoltage, overpower, overcurrent, overtemperature, and RI/DFI protection
features.
– Built-in output and sense disconnect relays.
– Output terminals floating with respect to chassis ground.
– Extensive self-test, status reporting, and software calibration.

30 Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide
 General Information 1

Front Panel with Remote Operation

The front panel has both rotary (RPG) and keypad controls for setting the output
voltage and frequency. The panel display provides digital readouts of a number of
output measurements. Annunciators display the operating status of the ac source.
System keys let you perform system functions such as setting the GPIB address
and recalling operating states. Front panel Function keys access the ac source
function menus. Front panel Entry keys let you select and enter parameter values.
Refer to Chapter 4, " Front Panel Operation" for a complete description of the
front panel controls.

Remotely programming is accomplished from either the GPIB bus, RS-232

serial port, LAN port, or USB. These interfaces use Standard Commands for
Programmable Instruments (SCPI) commands that make the ac source programs
compatible with those of other instruments. AC source status registers permit
remote monitoring of a wide variety of ac source operating conditions.

Refer to the Keysight Models 6811C, 6812C, and 6813C AC Power Solutions
NOTE Programming Guide for further information about remotely programming the ac
source.

Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide 31
1 General Information

Steady-state Output Characteristic

The ac source's steady-state output characteristic is shown in the following figure.
Steady-state characteristics are output ratings that will be maintained by the ac
source for an indefinite time. The “Peak Current or Dynamic Power Capability” on
page 33 describes the dynamic output capability of the unit. The following figure
shows both the AC and the DC characteristics. With programmable output
coupling, the ac source can supply both DC and AC output voltages.
AC source operation is specified from 45 to 1000 Hz (refer to Appendix A,
"Specifications"). However, you can operate the unit at frequencies less that
45 Hz. The operating characteristics of the ac source at output frequencies below
45 Hz are documented in Table A-3 of Appendix A.

285 W (6811C)
575 W (6812C)
1350 W (6813C)
115 V (6811C/6812C)
135 V (6812C)

375 VA (6811C)
750 VA (6812C) –25 A (6811C)
1750 VA (6813C) –5 A (6812C)
–10 A (6813C)

0.67 A (6811C) 2.5 A (6811C)

1.35 A (6812C) 5 A (6812C)
115 V (6811C/6812C) 3.17 A (6813C) 10 A (6813C)
135 V (6812C)

1.25 A (6811C) 3.25 A (6811C)

2.5 A (6812C) 6.5 A (6812C)
5.8 A (6813C) 13 A (6813C)

–Vdc

Figure 1-2 Steady-state output characteristic (in real-time mode)

32 Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide
 General Information 1

Peak Current or Dynamic Power Capability

The ac source can generate peak currents that exceed the rms current capability
of the unit. This not only applies when operating in AC mode, but also when
programming output pulses in DC mode. Although the unit will generate peak
output currents up to 40 A (Keysight 6811C/6812C) or 80 A (Keysight 6813C), the
unit can only maintain this output for a limited time. If the output of the unit
exceeds the limit of the safe operating area (SOA), the unit will activate its internal
protection mode and turn its output off. This SOA limit is based on output voltage,
output current, output duration, and heatsink temperature.

Refer to “Clearing protection conditions” on page 107 on how to clear the unit
NOTE when the internal protection mode has been activated.

Peak current limit

By programming the peak current limit, you can prevent the unit from exceeding
the SOA, activating its internal protection mode, and turning the output off. The
peak current limit circuit limits the instantaneous output current. It functions by
reducing the instantaneous output voltage to keep the output peak current within
the programmed limit. Because the circuit acts instantly, the effect is that it will
clip the peaks of the output voltage waveform. Additionally, with fast and/or large
voltage transitions, the unit may momentarily go into CC operating mode due to
current in the output capacitor. This serves to limit the rate of change of output
voltage.
The following table gives approximate indications of how long the unit will tolerate
peak output currents before the SOA limits are exceeded. Because these values
are voltage dependent, the table includes various equivalent DC voltages along
with the peak current values. The voltages shown in the table are NOT the
programmed voltages, but the average voltage values that will appear at the
output when the indicated high current condition exists. The SOA circuit becomes
active at higher voltage and current values as well as at longer duration times.

Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide 33
1 General Information

Table 1-3 Typical peak current output capacities

Keysight 6811C Equivalent dc voltage when current is flowing[a]

Keysight 6813C
Keysight 6812C 25 75 125 190 250 360
20 A 10 A >100 ms >100 ms >100 ms >100 ms >100 ms >100 ms
30 A 15 A >100 ms 100 ms 30 ms 24 ms 19 ms 15 ms
40 A 20 A 12 ms 9.2 ms 8.4 ms 7.6 ms 6.8 ms 5.9 ms
50 A 25 A 5.6 ms 5.1 ms 4.7 ms 4.4 ms 4 ms 3.5 ms
60 A 30 A 3.7 ms 3.4 ms 3.1 ms 2.9 ms 2.6 ms 2.3 ms
70 A 35 A 2.6 ms 2.4 ms 2.2 ms 2.1 ms 1.9 ms 1.7 ms
80 A 40 A 2 ms 1.8 ms 1.7 ms 1.6 ms 1.4 ms 1.3 ms

[a] Based on 25 °C ambient temperature, with heatsink temperature less than 50 °C.

Peak inrush example

The following table gives the recommended initial Ipeak settings when the ac
source output is a 127 VAC or 254 VAC 60 Hz sine wave, as a function of load
capacitance. The load on the output is a full-wave bridge along with the indicated
capacitor. The load resistance across the capacitor is infinite. The recommended
Ipeak will change as a function of changes in input as follows:
– as voltage increases, the Ipeak setting needs to be decreased.
– as frequency increases, the Ipeak setting can be increased.
– as load resistance decreases, the Ipeak setting needs to be decreased.
Note that the purpose of programming the Ipeak current is to prevent the unit from
activating its internal protection mode as a result of exceeding the SOA limits, and
turning the output off. These initial settings may have to be reduced if the SOA
circuit trips when the output is turned on. Sometimes trial and error must be used
to arrive at the proper values of Ipeak.

34 Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide
 General Information 1

Table 1-4 Recommended Ipeak settings as a function of loop capacitance

Capacitance in μF
Ipeak setting
127 V 254 V
≤1100 500 80 A
1200 - 60 A
1700 700 50 A
5000 1000 45 A
>5000 >1000 <45 A

The following waveform illustrates the inrush current capability of the ac source.
The peak current is limited during inrush in accord with Table 1-3 to keep the ac
source from turning its output off. Note that the output current waveform returns
to its normal shape when the current drops below the peak current limit setting.

Figure 1-3 Peak inrush current example

Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide 35
1 General Information

RMS Current Limit Circuit

The output rms current limit is adjustable to any value within the range of the unit.
If the load attempts to draw more current than the programmed limit, the output
voltage is reduced to keep the rms current within the limit. When the output
voltage is reduced, the waveform shape is preserved. In other words, all parts of
the voltage cycle are reduced and not just the peaks.

The speed at which the rms current circuit operates depends on the output
NOTE voltage setting and the load impedance. The circuit responds more slowly at low
output voltages and at high output impedances. With constant power or
negative resistance loads, the rms current limit circuit causes the output voltage
to go to zero.

36 Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide
 General Information 1

Voltage Regulation

Real time regulation

The default method of output regulation used by the ac source is real-time
voltage regulation. Real-time voltage regulation tries to provide the actual
programmed waveform at the output of the ac source. It offers the best overall
programming response and fastest settling times. It does not have any limitations
for waveforms and transients with frequency content below 45 Hz.

RMS regulation
RMS voltage regulation assists real-time regulation to level out or stabilize the
rms value of the ac component of the output voltage. Use rms voltage regulation
in the following situations:
– If you experience load regulation effects with heavy loads.
– If you experience frequency regulation problems with heavy loads and you
require flatter programming accuracy at higher frequencies.
– In conjunction with programmable output impedance, if you wish to maintain
the rms level of output voltage as the source impedance is increases. (Refer to
“Output Impedance” on page 38 for more information.)
The command to specify voltage regulation is VOLT:ALC:DET RTIM | RMS.

Do not use rms voltage regulation when operating at frequencies less than
NOTE 45 Hz.

Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide 37
1 General Information

Output Impedance
You can program the real and/or reactive (resistive and/or inductive) part of the
output impedance of the ac source. Inductive output impedances can be
programmed in the range of 20 to 1000 microhenries. Resistive load impedances
can be programmed in the range of 0 to 1 ohms.
When programming output impedances, the lower your load impedance, the
LESS programmed impedance you can use and still maintain output voltage
stability. This applies particularly for load impedances less than 1 ohm.

Programming the ac source output impedance into a load with a low impedance
NOTE can cause output voltage instability, which may damage the ac source. Stability
MUST be maintained when operating the ac source with programmable
resistance or inductance.
To check for stability, monitor the output voltage with an oscilloscope. Instability
exists if a 5 kHz to 20 kHz oscillation, which is dependent upon the ac source's
programmed inductance and the capacitance of the load, is present at any time
during the following procedure.
1 When programming inductance, it is recommended that you first add a series
resistance either by programming the output resistance to 1 ohm or by adding
an equivalent external resistor.
2 Slowly program the inductance to the desired level while monitoring the
output for any voltage instability. Do not proceed any further if the output
shows any signs of instability.
3 If less output resistance is required, slowly start lowering the resistance while
monitoring the output for any voltage instability. Do not proceed any further if
the output shows any signs of instability.
4 If you cannot achieve satisfactory results with this procedure, disable the
output impedance control and use an external impedance network.

RMS voltage regulation can be used in conjunction with programmable output

impedance to regulate the rms value of the ac component of the output voltage
when programmed impedances cause distortion with nonlinear loads or reduced
output voltage due to regulation effects.

38 Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide
 General Information 1

Note that real-time voltage regulation will permit the load current to cause output
voltage degradation based on the programmed impedance and current drawn
from the source, whereas rms regulation will reestablish the rms value at the
programmed level.

Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide 39
1 General Information

Output Coupling
AC output coupling mode mimics a transformer-coupled output, working to
maintain a zero average output voltage. This means that the output tries to
remove any DC content on the output, whether the DC content is generated from
a programmed offset or results from transients with DC content. The AC output
coupling has a corner frequency of about 2 Hz, which will not prevent transient
waveforms that may have short-term DC content, but will regulate the waveform
back to an average value of zero volts in the steady state.

DC output coupling mode is used to generate DC offset voltages or output

transients that have net DC components. In either mode of operation, the
maximum voltage that the ac source can output is limited to 425 Vpeak.
The AC capability of the output is limited by VA (volt-amperes) rather than power
(watts). The amount of VA available to a load can be determined by examining
Figure 1-2. Full output VA is available with no limitations except for the
boundaries imposed by the maximum rms voltage of 300V, and the maximum rms
current, which is model-dependent. Note that large peak power transients can be
delivered by the ac source as earlier described under “Peak Current or Dynamic
Power Capability” on page 33 (Appendix A documents the ac source's
specifications and supplemental characteristics.)

40 Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide
 Keysight Models 6811C, 6812C, and 6813C AC Power Solutions
User’s and Service Guide

2 Installation
Inspection 42
Location 44
Input Connections 46
Output Connections 49
Remote Sense Connections 52
Trigger Connections 54
Digital Connections 55
Controller Connections 57

41
2 Installation

Inspection
Ensure that your ac source is not damaged and the items supplied is complete.

Damage
When you receive your ac source, inspect it for any obvious damage that may
have occurred during shipment. If there is damage, notify the shipping carrier and
the nearest Keysight Sales and Support Office immediately. Warranty information
is printed in the front of this guide.

Packaging material
Until you have checked out the ac source, save the shipping carton and packing
materials in case the unit has to be returned. If you return the ac source for
service, attach a tag identifying the model number and the owner. Also include a
brief description of the problem.

Items supplied
Check that the following items are included with your ac source. Some items are
installed in the unit.

Power cord A power cord appropriate for your location. The cord may
or may not be terminated in a power plug (see “Options
and parts” on page 26 in Chapter 2). If the cord is not
included, contact your nearest Keysight Sales and
Support Office (refer to the “Sales and Technical Support”
on page 14).
Digital connector 4-terminal digital plug that connects to the back of the
unit.
Safety covers AC input cover with strain relief
AC output cover
Information sheet Obtaining Documentation for Keysight 6800C Series AC
Power Source/Analyzers

42 Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide
 Installation 2

Cleaning
Use a dry cloth or one slightly dampened with water to clean the external case
parts. Do not attempt to clean internally.

To prevent electric shock, unplug the unit before cleaning.

WARNING
Pour éviter tout choc électrique, débranchez l'unité avant de la nettoyer.

Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide 43
2 Installation

Location
Refer to the Safety Considerations at the beginning of this manual for
safety-related information about environmental conditions.

Keysight 6811C/6812C units weigh 29.1 kg (64.2 lbs).

CAUTION
Keysight 6813C units weigh 30.1 kg (66.4 lbs).
Obtain adequate help when moving or mounting the unit in the rack.
Les unités Keysight 6811C/6812C pèsent 29,1 kg (64,2 lbs).
Les unités Keysight 6813C pèsent 30,1 kg (66,4 lbs).
Faites-vous aider de manière adaptée lors du montage ou du déplacement
de l'unité dans l'armoire.

Bench operation
The outline diagram in Figure 2-1 gives the dimensions of your ac source. The feet
may be removed for rack mounting. Your ac source must be installed in a location
that allows sufficient space at the sides and back of the unit for adequate air
circulation. Minimum clearances are 1 inch (25 mm) along the sides. Do not block
the fan exhaust at the rear of the unit.

Rack mounting
The ac source can be mounted in a standard 19-inch rack panel or cabinet. Rack
mounting kits are available as Option 1CM or 1CP. Installation instructions are
included with each rack mounting kit. Keysight ac sources also require
instrument support rails in addition to the rack mount kit. Support rails are
normally ordered with the cabinet and are not included with the rack mounting
kits.

44 Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide
 Installation 2

Figure 2-1 Outline diagram

Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide 45
2 Installation

Input Connections

Input source and line fuse

You can operate your ac source from a single-phase ac power source as indicated
on the rear panel Line Rating label. Refer to AC input voltage range (Vac) in
Table A-2 of Appendix A, "Specifications" for details.

SHOCK HAZARD. The power cord provides a chassis ground through a third
WARNING conductor. Be certain that your power outlet is of the three-conductor type
with the correct pin connected to earth ground.

RISQUE D'ELECTROCUTION. Le cordon d'alimentation assure la mise à la

terre du châssis par l'intermédiaire d'un troisième conducteur. Vérifiez que
votre prise de courant comporte trois conducteurs, la broche appropriée
étant reliée à la terre.

The ac source must be on a dedicated line with no other devices consuming

CAUTION current from it.
La ac source doit se situer sur une ligne dédiée sans autre dispositif tirant du
courant de celle-ci.

The line fuse is located inside the ac source. Refer to “In Case of Trouble” on
page 69 of Chapter 3, "Turn-On Checkout" for instructions on fuse replacement.

Installing the power cord

The power cord supplied with the ac source may or may not include a power plug
at one end of the cord. Refer to Table 1-1 for detailed information.
For Model 6811C, refer to Figure 2-2 and connect the power cord to the IEC 320
connector on the rear of the unit. If your unit does not have this connector, refer to
the procedure for models 6812C and 6813C.

46 Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide
 Installation 2

Figure 2-2 Connecting the power cord (6811C)

For Models 6812C and 6813C, refer to Figure 2-3 while performing the following
procedure.

Installation of the power cord must be done by a qualified and licensed

WARNING electrician and must be in accordance with local electrical codes.

L'installation du cordon d'alimentation doit être effectuée par un électricien

qualifié et agréé et doit respecter les codes électriques locaux.

1 If they are not already in place, position the strain relief connector (8), power
safety cover (7), rubber boot (6) and connector nut (5) on the power cord (4).
2 Secure the ground wire (1) to the chassis earth ground stud.
3 Connect the neutral wire (3) to the N power input terminal.
4 Connect the line (2) to the L1 power input terminal.
5 Position the safety cover over the power input terminals, tighten the cover and
strain relief screws.

Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide 47
2 Installation

Figure 2-3 Connecting the power cord (6812C and 6813C)

48 Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide
 Installation 2

Output Connections
The power output terminal block has a floating output terminal connection and a
floating neutral line for the return connection. A separate earth ground terminal is
located on the extreme right of the terminal block.

Figure 2-4 Output connections

Safety cover

Figure 2-5 Output connections safety cover

Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide 49
2 Installation

SAFETY HAZARD. You must secure the safety cover (see Figure 2-5) that was
WARNING removed after completing all connections. This is because the screw
terminals will be at line potential during operation.

RISQUE DE SÉCURITÉ. Vous devez fixer fermement le couvercle de sécurité

(voir Figure 2-5) qui a été retiré après avoir mis en place toutes les
connexions. Les bornes à vis se trouveront en effet au potentiel de ligne
pendant le fonctionnement.

Wire considerations

To minimize the possibility of instability on the output, keep load leads as short
NOTE as possible bundle or twist the leads tightly together to minimize inductance

Current ratings

FIRE HAZARD. To satisfy safety requirements, load wires must be large

WARNING enough not to overheat when carrying the maximum short-circuit current of
the ac source. If there is more than one load, then any pair of load wires must
be capable of safely carrying the full-rated current of the ac source.

RISQUE D'INCENDIE. Pour répondre aux exigences en matière de sécurité,

les fils de charge doivent être assez gros pour ne pas surchauffer lorsqu'ils
transportent le courant de court-circuit maximal de la ac source. S'il existe
plus d'une charge, alors toutes les paires de fils de charge doivent pouvoir
transporter en toute sécurité le courant nominal total de la ac source.

50 Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide
 Installation 2

Table 2-1 lists the characteristics of AWG (American Wire Gauge) copper wire.

Table 2-1 Ampacity and resistance of stranded copper conductors

Resistance[b] Resistance[b]
AWG No. Ampacity[a] AWG No. Ampacity[a]
(Ω/m) (Ω/m)
14 25 0.0103 6 80 0.0016
12 30 0.0065 4 105 0.0010
10 40 0.0041 2 140 0.00064
8 60 0.0025 1/0 195 0.00040

[a] Ampacity is based on 30 °C ambient temperature with conductor rated at 60 °C. For ambient temperature other
than 30 °C, multiply the above ampacities by the following constants:

Temperature (C) Constant Temperature (C) Constant

21-25 1.08 41-45 0.71
26-30 1.00 46-50 0.58
31-35 0.91 51-55 0.41
36-40 0.82

[b] Resistance is nominal at 75 °C wire temperature.

Voltage drops
The load wires must also be large enough to avoid excessive voltage drops due to
the impedance of the wires. In general, if the wires are heavy enough to carry the
maximum short circuit current without overheating, excessive voltage drops will
not be a problem. Refer to Table 2-1 to calculate the voltage drop for some
commonly used AWG copper wire. If load regulation becomes a problem refer to
the section “Remote Sense Connections” on page 52.

Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide 51
2 Installation

Remote Sense Connections

Under normal operation, the ac source senses the output voltage at the output
terminals on the back of the unit. External sense terminals are available on the
back of the unit that allow the output voltages to be sensed at the load,
compensating for impedance losses in the load wiring as shown in Figure 2-6:
– Connect the phase 1 (1) sense terminals to the side of the load that connects
to the corresponding output terminal.
– Connect the Neutral (COM) sense terminal connector to the neutral side of the
load.
– Twist and shield all signal wires to and from the sense connectors.
The sense leads are part of the ac source's feedback path and must be kept at a
low resistance in order to maintain optimal performance. Connect the sense leads
carefully so that they do not become open-circuited.

If the sense leads are left unconnected or become open during operation,
CAUTION the ac source will regulate at the output terminals, but with a 40% increase
in output voltage over the programmed limit. The meter circuit cannot read
back this increase in output voltage when the sense lead is disconnected.
Si les conducteurs de détection sont laissés dans l'état non connecté ou s'ils
s'ouvrent pendant le fonctionnement, la ac source effectuera une régulation
au niveau des bornes de sortie, mais avec une augmentation de 40 % de la
tension de sortie par rapport à la limite programmée. Le circuit du compteur
ne peut pas lire cette augmentation de la tension de sortie lorsque le
conducteur de détection est déconnecté.

Set the ALC command to EXT (external) to enable remote sensing. The ALC
command is located under the Voltage key as explained in Chapter 4, " Front
Panel Operation". Set the ALC command to INT (internal) to disable remote
sensing.

If you are using external relays to connect and disconnect the load and sense
NOTE connections, do NOT permit the sense connections to open when remote
sensing is enabled. First disable remote sensing, then open the sense and load
connections.

52 Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide
 Installation 2

Figure 2-6 Remote sense connections

Remote sensing and overvoltage protection (OVP) considerations

In remote sensing applications, the voltage drop in the load leads subtracts from
the available load voltage whereby up to 1 Vrms can be dropped across each load
lead. As the ac source increases its output to overcome this voltage drop, the sum
of the programmed voltage and the load-lead drop may exceed the ac source's
maximum voltage rating. This may trip the OVP circuit, which senses the voltage
at the output terminals, not at the load. When using remote sensing, you must
program the OVP trip voltage high enough to compensate for the voltage drop
between the output terminals and the load.

If the load causes the peak current limit circuit to become active, voltage
NOTE transitions on the output may cause unnecessary tripping of the OVP circuit.

Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide 53
2 Installation

Trigger Connections
The BNC trigger connectors on the rear panel let you apply trigger signals to the
ac source as well as generate trigger signals from the ac source. The electrical
characteristics of the trigger connectors are described in Appendix A,
"Specifications". More information on programming external triggers is found in
“Chapter 4” of the Keysight Models 6811C, 6812C, and 6813C AC Power
Solutions Programming Guide.

Trigger IN Allows negative-going external trigger signals to trigger the ac

source.
Trigger OUT Generates a negative-going pulse when the selected transient
output has occurred.

54 Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide
 Installation 2

Digital Connections
This connector, which is on the rear panel, is for connecting the fault and the
inhibit signals. The fault (FLT) signal is also referred to as the DFI signal in the front
panel and SCPI commands. The inhibit (INH) signal is also referred to as the RI
signal in the front panel and SCPI commands.
The connector accepts wires sizes from AWG 22 to AWG 12. Disconnect the
mating plug to make your wire connections. The electrical characteristics of the
digital connectors are described in Appendix A, "Specifications". More information
on programming the digital connectors is found in “Chapter 4” of the Keysight
Models 6811C, 6812C, and 6813C AC Power Solutions Programming Guide.

It is good engineering practice to twist and shield all signal wires to and from the
NOTE digital connectors

The following examples (shown in Figure 2-7) show how you can connect the FLT/
INH circuits of the ac source.
– In example A, the INH input connects to a switch that shorts pin + to pin
whenever it is necessary to disable output of the unit. This activates the
remote inhibit (RI) circuit, which turns off the ac output. The front panel Prot
annunciator comes on and the RI bit is set in the Questionable Status Event
register. To re-enable the unit, first open the connection between pins + and
, then clear the protection circuit. This can be done either from the front
panel or over the GPIB, RS-232, LAN, or USB.
– In example B, the FLT output of one unit is connected to the INH input of
another unit. A fault condition in one of the units will disable all of them
without intervention either by the controller or external circuitry. The controller
can be made aware of the fault via a service request (SRQ) generated by the
Questionable Status summary bit.

Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide 55
2 Installation

Figure 2-7 FLT/INH examples

56 Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide
 Installation 2

Controller Connections
The ac source connects to a controller either through a GPIB, RS-232 connector,
LAN, or USB.

GPIB connector
Each ac source has its own GPIB bus address. AC sources may be connected to
the bus in series configuration, star configuration, or a combination of the two.
You may connect from 1 to 15 ac sources to a controller GPIB interface.

The ac source is shipped from the factory with its GPIB address set to 5. This
NOTE address can be changed as described in “Setting the GPIB address and RS-232
parameters” on page 125 of this guide.

RS-232 interface
The ac source provides an RS-232 programming interface, which is activated by
commands located under the front panel Address key.

RS-232 data format

– constant 11-bit data format
– one start bit
– seven data bits plus a parity bit (even or odd parity), or eight data bits without
parity (parity bit is “0”)
– two stop bits
You can specify one of the following baud rates: 1200, 2400, 4800, or 9600

The ac source always uses one start bit and two stop bits regardless of the baud
NOTE rate. The number of start and stop bits is not programmable.

Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide 57
2 Installation

RS-232 connector
The RS-232 connector is a DB-9, male connector. You can connect the ac source
to any computer or terminal with a properly configured DB-25 connector. You can
use a standard Keysight 24542G or 24542H interface cable.

Table 2-2 RS-232 connector

Pin Input/Output Description
1 Output Reserved for service use
2 Input Receive Data (RxD)
3 Output Transmit Data (TxD)
4 Output Data Terminal Ready (DTR)
5 Common Signal ground
6 Input Data Set Ready (DSR)
7 - No connection
8 - No connection
9 Output Reserved for service use

58 Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide
 Installation 2

Hardware handshake
The RS-232 interface uses the data terminal ready (DTR) line as a holdoff signal to
the bus controller. When DTR is true, the bus controller may send data to the ac
source. When DTR goes false, the bus controller must stop sending data within 10
characters, and must not send any more data until DTR goes true again. The ac
source sets DTR false under two conditions.
– When the input buffer is full (approximately 100 characters have been
received), it will set DTR false. When enough characters have been removed to
make space in the input buffer, DTR will be set to true, unless condition 2 (see
the following) prevents this.
– When the ac source wants to “talk”, which means that it has processed a
query, and has seen a <newline> message terminator, it will set DTR false. This
implies that once a query has been sent to the power source, the bus
controller should read the response before attempting to send more data. It
also means that a <newline> must terminate the command string. After the
response has been output, the ac source will set DTR true again, unless
condition 1 prevents this.
The ac source monitors the data set ready (DSR) line to determine when the bus
controller is ready to accept data. It checks this line before each character is sent,
and the output is suspended if DSR is false. When DSR goes true, transmission
will resume. The ac source will leave DTR false while output is suspended. A form
of deadlock exists until the bus controller asserts DSR true to allow the ac source
to complete the transmission.
Control-C is the equivalent to the GPIB device clear command. It clears the
operation in progress and discards any pending output. For the control-C
character to be recognized by the power source while it holds DTR false, the bus
controller must first set DSR false.
Null modem RS-232 interface cables swap the DTR and DSR lines as shown in the
Figure 2-8. For other bus controllers or languages, you must determine what form
of hardware handshake is used. You may have to build a customized cable to
connect the holdoff lines as necessary. If your bus controller does not use
hardware handshaking, tie the DSR input to the ac source to a signal that is
always true. This implies that your bus controller must always be ready to accept
data. You may want to set the baud rate to either 2400 or 4800 baud to ensure
that this is true.

Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide 59
2 Installation

Figure 2-8 Null modem interface lines

Response data terminator

All RS-232 response data sent by the ac source is terminated by the single
character <newline> which is identical to the GPIB response data as well.

60 Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide
 Keysight Models 6811C, 6812C, and 6813C AC Power Solutions
User’s and Service Guide

3 Turn-On Checkout
Introduction 62
Preliminary Checkout 63
Using the Keypad 64
Checkout Procedure 65
In Case of Trouble 69

61
3 Turn-On Checkout

Introduction
Successful tests in this chapter provide a high degree of confidence that the ac
source is operating properly. For verification tests, see Appendix B, "Verification
and Calibration".

This chapter provides a preliminary introduction to the ac source front panel.

NOTE See Chapter 4, " Front Panel Operation" for more details.

62 Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide
 Turn-On Checkout 3

Preliminary Checkout
LETHAL VOLTAGES. AC sources can supply 425 Vpeak at their output. DEATH
WARNING
on contact may result if the output terminals or circuits connected to the
output are touched when power is applied.

TENSIONS MORTELLES. Les AC source peuvent fournir 425 Vmaximum au

niveau de leur sortie. Tout contact peut entraîner la MORT si les circuits ou
bornes de sorties connectés à la sortie sont touchés lorsqu'ils sont sous
tension.

1 If you have not already done so, connect the power cord to the ac source and
plug it in.
2 Turn the front panel power switch to ON (1).
3 The ac source undergoes a self-test when you turn it on. The following items
appear on the display:
a A brief pattern that lights all display segments, followed by the model
number and the software revision number.
b The display then goes into the meter mode with the Dis annunciator on,
and all others off. “Meter mode” means that the VOLTS digits indicate the
output voltage and the FREQ digits indicate the output frequency. The
voltage will be at or near zero and the frequency will be at 60 Hertz.

If the ac source detects an error during self-test, the Err annunciator on the
NOTE display will be lit. Pressing the [Shift] and [Error] keys will show the error
number. Refer to “In Case of Trouble” on page 69 at the end of this chapter.

4 Check that the ac source fan is on. You should be able to hear the fan and feel
the air coming from the unit.
5 Press [Output On/Off] once. The Dis annunciator will go off and the CV
annunciator will go on.
6 Turn the unit off.

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3 Turn-On Checkout

Using the Keypad

Some of the front panel keys perform two functions, one labeled
in white and the other in blue. You access the blue function by
first pressing the blue [Shift] key. Release the key after you press
it. The Shift annunciator will be on, indicating that you have
access to any key's shifted function.
These function keys let you scroll up and down through the
choices in the presently selected function menu. All menu lists
are circular; you can return to the starting position by
continuously pressing either key.
These entry keys let you select the previous or the next parameter
for a specific command. If the command has a numeric range,
these keys increment or decrement the existing value.
The backspace key is an erase key. If you make a mistake
entering a digit and have not yet pressed [Enter], you can delete
the digit by pressing this key. Delete more digits by repeatedly
pressing this key.
Executes the entered value or parameter of the presently
accessed command. Until you press this key, the parameters you
enter with the other keys are displayed but not entered into the
ac source. After pressing [Enter], the ac source returns to Meter
mode in most cases. In Harmonic or List mode, the ac source
displays the next point in the list.

64 Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide
 Turn-On Checkout 3

Checkout Procedure
LETHAL VOLTAGES. AC sources can supply 425 Vpeak at their output. DEATH
WARNING
on contact may result if the output terminals or circuits connected to the
output are touched when power is applied.

The output test requires that you connect light bulbs to the output of the unit
and apply a potentially hazardous voltage of 120 VAC. Properly shield all
connections and wires.

TENSIONS MORTELLES. Les AC source peuvent fournir 425 Vmaximum au

niveau de leur sortie. Tout contact peut entraîner la MORT si les circuits ou
bornes de sorties connectés à la sortie sont touchés lorsqu'ils sont sous
tension.
Le test de sortie nécessite de connecter des ampoules à la sortie de l'unité et
d'appliquer une tension potentiellement dangereuse de 120 VAC. Protégez
correctement toutes les connexions et tous les fils.

The test in this section checks for output voltage and current on the ac source by
having you connect light bulbs to the output of the unit. The following equipment
is recommended for performing this output checkout procedure:
– One (1) 100 W light bulb
– One (1) light bulb socket
– Wires for connecting socket to the unit

When the ac source is turned on as shipped from the factory, it asserts the *RST
NOTE state. You can subsequently program the unit to turn on according to the state
stored in *RCL location 0, as explained in “System Keys” on page 78 of
Chapter 4, " Front Panel Operation". The following procedures assume that the
unit turns on in the *RST state.

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3 Turn-On Checkout

Make sure that the unit is turned off, and make the following connections to the
output.

Figure 3-1 Verification connections

Procedure Display Explanation

1 Turn the unit on. Meter mode Meter mode is active and the Dis annunciator should be on.
2 Press the Voltage key. VOLT 0.00 Display indicates the default settings.
3 Press [1], [2], [0], [Enter]. VOLT 120 Programs the output voltage to 120 Vrms. After the value is entered,
the display returns to Meter mode, which indicates that no voltage is
applied to the output.
4 Press [Output On/Off]. 120 V 60 Hz Turns the output on and applies 120 volts to the light bulb. The Dis
annunciator should be off and CV should be on.

66 Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide
 Turn-On Checkout 3

Procedure Display Explanation

5 Press [Protect]. VOLT:PROT ON You have enabled the overvoltage protection circuit.
Scroll to VOLT:PROT ON/OFF by
pressing ▲ or ▼ of the Function
key group.
Select ON by pressing ▲ or ▼
of the Entry key group.
Press [Enter].
6 Press [Protect]. VOLT:PROT 500 Display shows the overvoltage protection trip voltage for your unit.
Scroll to VOLT:PROT by pressing The overvoltage protection voltage is programmed in peak, not rms
▲ or ▼ of the Function key volts.
group.
7 Press [1], [6], [0], [Enter]. VOLT:PROT 160 Programs the OVP to 160 Vpeak, the rms value of which is less than
the previously set rms voltage.
0 V 60 Hz Because the peak OVP voltage entered was less than the rms output
voltage, the OVP circuit tripped. The output dropped to zero, CV
turned off, and Prot turned on.
8 Press [Protect]. VOLT:PROT 320 Programs the OVP to a peak value that is greater than the rms output
Scroll to VOLT:PROT by pressing voltage value.
▲ or ▼ of the Function key Note: You cannot clear an OVP trip until you have first removed the
group. cause of the condition.
Press [3], [2], [0], [Enter].
9 Press [Protect] and [Enter]. 120 V 60 Hz Executes the PROT:CLEAR command, restoring the output. Prot turns
off and CV turns on.
10 Press [Shift] and [Current]. CURR:LEV 5 Indicates the default output current limit setting.
11 Press [.], [5], [Enter]. CURR:LEV .5 Sets the current limit to 0.5 amperes. The CC annunciator is on,
indicating that the unit is in current limit mode and the light bulbs are
dimmer because the output voltage has dropped in its attempt to
limit output current.
12 Press [Protect]. CURR:PROT ON You have enabled the overcurrent protection circuit. The circuit then
Scroll to CURR:PROT ON/OFF by tripped because of the output short. The CC annunciator turns off and
pressing ▲ or ▼ of the Function the OCP and Prot annunciators come on. The output current is near
key group. zero.
Select ON by pressing ▲ or ▼
of the Entry key group.
Press [Enter].

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3 Turn-On Checkout

Procedure Display Explanation

13 Press [Output On/Off]. 0.5 V 60 Hz The output is off and the Dis annunciator turns on.
14 Press [Protect]. CURR:PROT OFF You have disabled the overcurrent protection circuit. The Prot
Scroll to CURR:PROT ON/OFF by annunciator turns off.
pressing ▲ or ▼ of the Function
key group.
Select OFF by pressing ▲ or ▼
of the Entry key group.
Press [Enter].
15 Turn the unit off. The next time the unit turns on it will be restored to the *RST or
factory default state

68 Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide
 Turn-On Checkout 3

In Case of Trouble

Error messages
AC source failure may occur during power-on start-up, self-test, or during
operation. In either case, the display may show an error message that indicates
the reason for the failure.

Start-up errors
If start-up error messages appear on the front panel display when you turn on the
ac source, the ac source requires service.

Table 3-1 Power-on start-up errors

Error message
Error no. on the front Description
panel display
Err 60 ERR FPGA ID FPGA JTAG error
Err 61 ERR FPGA IMAGE FPGA image invalid
Err 62 ERR FPGA VER. Model detection FPGA version invalid
Err 63 ERR VOLT RAIL Analogue voltage rail failed
Err 64 ERR MODEL BIT Model detection FPGA model bit invalid
Err 65 ERR CHECKSUM Model detection EEPROM model checksum failed
Err 66 ERR MISMATCH Model detection between FPGA and EEPROM incompatible
Err 67 ERR EEPROM VER. EEPROM version is higher than expected

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3 Turn-On Checkout

Self-test errors
Pressing the [Shift] and [Error] keys will show the error number. Self-test error
messages appear as:
ERROR <n>, where “n” is a number listed in the following table. If this occurs, turn
the power off and then back on to see if the error persists. If the error message
persists, the ac source requires service.

Table 3-2 Power-on self-test errors

Error no. Failed test
Err 0 No error
Err 1 Non-volatile RAM RDO section checksum failed
Err 2 Non-volatile RAM CONFIG section checksum failed
Err 3 Non-volatile RAM CAL section checksum failed
Err 4 Non-volatile RAM WAVEFORM section checksum failed
Err 5 Non-volatile RAM STATE section checksum failed
Err 6 Non-volatile RAM LIST section checksum failed
Err 10 RAM self-test
Err 11 to Err 31 DAC self-test 1 to 21
Err 90 Non-volatile RAM IO DATA section checksum failed
Err 91 Non-volatile RAM ROM VERS checksum failed
Err 92 Non-volatile RAM SERIAL section checksum failed
Err 93 Non-volatile RAM MAC ADDR section checksum failed
Err 94 Non-volatile RAM LAN section checksum failed
Err 95 Non-volatile RAM HTTP section checksum failed
Err 96 Non-volatile RAM PERSONA section checksum failed
Err 97 Non-volatile RAM CAL INFO section checksum failed

70 Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide
 Turn-On Checkout 3

Runtime error messages

Under unusual operating conditions, the front panel display may show OVLD. This
indicates that the output voltage or current is beyond the range of the meter
readback circuit. If the front panel display indicates -- -- -- -- -- --, a GPIB
measurement is in progress. Appendix C, "Error Messages" lists other error
messages that may appear at runtime.

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3 Turn-On Checkout

THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK.

72 Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide
 Keysight Models 6811C, 6812C, and 6813C AC Power Solutions
User’s and Service Guide

4 Front Panel Operation

Introduction 74
Front Panel Description 75
System Keys 78
Function Keys 81
Entry Keys 99
Examples of Front Panel Programming 101

73
4 Front Panel Operation

Introduction
This chapter lists the following:
– A complete description of the front panel controls.
– Front panel programming examples that describes how to perform the
following:
– Access ac source information.
– Program the output voltage and frequency.
– Measure the output.
– Program the output pulses and lists.
– Trigger output changes.
– Configure LAN connection.

74 Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide
 Front Panel Operation 4

Front Panel Description

1 2 5 6 7

3 4

Figure 4-1 Front panel - overall view

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4 Front Panel Operation

1 Display 14-character vacuum fluorescent display for showing

programmed commands and measured values.
2 Annunciators Annunciators light to indicate the following operating modes
and status conditions:

1 Phase 1 is being controlled or metered.

CV The ac source output is in constant-voltage mode.

CC The ac source output is in constant-current mode.
Unr The ac source output is in an unregulated state.
Dis The ac source output is disabled (off).
Tran The ac source output is initialized to output a transient.
OCP The overcurrent protection state is enabled.
Prot One of the ac source's output protection features is activated.
Cal The ac source is in calibration mode.
Shift The Shift key is pressed to access an alternate key function.
Rmt The selected interface (GPIB or RS-232) is in a remote state.
Addr The interface is addressed to talk or to listen.
Err There is a message in the SCPI error queue.
SRQ The interface is requesting service from the controller.
Meter Front panel measurement functions are: AC only, DC only, or
AC+DC AC+DC.
Output The ac source output coupling is: AC only, or AC+DC
AC+DC

3 Line This turns the ac source on or off.

4 Voltage/ The rotary pulse generators let you set the output voltage
Frequency and frequency when the ac source is in local mode. Their
response is rate sensitive.
– Turning a control rapidly provides coarse control of the
value.
– Turning a control slowly provides fine control of the value.

76 Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide
 Front Panel Operation 4

5 System keys The system keys let you:

– Display ac source information
– Return to Local mode (front panel control)
– Set the ac source GPIB address
– Set the RS-232 interface communication baud rate and
parity bit
– Display SCPI error codes and clear the error queue
– Save and recall up to 16 instrument operating
configurations
6 Function keys Function access command menus that let you:
– Program output voltage, current limit, frequency, and
output waveforms
– Turn the output on and off
– Select metering functions
– Send immediate triggers from the front panel
– Program transient output functions
– Set and clear protection functions
– Select output phases
– Select the coupling for output and meter functions
– Monitor instrument status
– Configure LAN connection
– Perform LAN reset
7 Entry keys Entry keys let you:
– Enter programming values
– Increment or decrement programming values
– Calibrate the ac source

Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide 77
4 Front Panel Operation

System Keys
Refer to the examples later in this chapter for more details on the use of these
keys.

Figure 4-2 System keys

Press this key to access the alternate or shifted function of a key

as indicated in the blue text (such as ERROR). Release the key
after you press it. The Shift annunciator is lit, indicating that the
shifted keys are active.
Press to change the ac source's selected interface from remote
operation to local (front panel) operation. Pressing the key will
have no effect if the interface state is already Local,
Local-with-Lockout, or Remote-with-Lockout.

78 Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide
 Front Panel Operation 4

Press to access the system address menu. This menu lets you
configure the ac source's interface. Address Menu entries are
stored in non-volatile memory.
Display Command function
ADDRESS <value> Sets the GPIB Address
BAUDRATE <value> Selects baud rate (1200, 2400, 4800, 9600)
PARITY <char> Message parity (NONE, EVEN, ODD, MARK, SPACE)
<value> = a numeric value
<char> = a character string parameter
Press ▲ and ▼ of the Function key group to scroll through the command list.
Press ▲ and ▼ of the Entry key group to scroll through the parameter list.

Press to place the ac source into a previously stored state. You

can recall up to 16 (0 through 15) previously stored states.

Press to display the ac source's instrument information.

Display Information
MODEL: <char> Instrument model name
OPTION: <char> Instrument option
SERIAL NO.: <enter><char> Instrument serial number
FW REV: <enter><char> Instrument firmware revision
MAC: <enter><char> Instrument MAC address
USB VID: <char> Instrument USB vendor ID
USB PID: <char> Instrument USB product ID
<enter> = press the [Enter] key to display information.

Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide 79
4 Front Panel Operation

Press to display the system error codes stored in the SCPI error
queue. This action also clears the queue. If there is no error in the
queue, 0 is displayed.
Press to store an existing ac source state in non-volatile memory.
The parameters saved are listed under *SAV in the Keysight
Models 6811C, 6812C, and 6813C AC Power Solutions
Programming Guide. You can save up to 16 states (0 through 15).

80 Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide
 Front Panel Operation 4

Function Keys
Refer to the examples later in this chapter for more details on the use of these
keys.

Figure 4-3 Function keys

Immediate action keys

Immediate action keys immediately execute their corresponding function when
pressed. Other function keys have commands underneath them that are accessed
when the key is pressed.

This key toggles the output of the ac source between the on and
off states. It immediately executes its function as soon as you
press it. When off, the ac source output is disabled and the Dis
annunciator is on.

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4 Front Panel Operation

This key only applies to three-phase ac sources.

Sends an immediate trigger to the ac source.

Scrolling keys
Scrolling keys let you move through the commands in the presently selected
function menu.

These Function keys let you move through the choices in a

command list. Press ▲ to bring up the next command in the list.
Press ▼ to go back to the previous command in the list. Function
(Function keys) menus are circular; you can return to the starting position by
continuously pressing either key.

These shifted Function keys apply only to the Harmonic and List
functions. Press these keys to step through integers 0 through 50
when specifying the desired harmonic number, or 0 through 99
when specifying the desired list point. Hold down these keys to
rapidly access any harmonic or list point.
(Function keys)
These Entry keys let you scroll through choices in a parameter
list that apply to a specific command. Parameter lists are circular;
you can return to the starting position by continuously pressing
(Entry keys)
either key. If the command has a numeric range, these keys
increment or decrement the existing value.

82 Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide
 Front Panel Operation 4

LAN control keys

LAN control keys control the LAN functions of the ac source.

If is displayed, press [Enter] to display the information for the command or

NOTE
save the command settings.

If and are displayed use ▲ or ▼ of the Function keys or Entry keys to scroll
up or down to display the information.

Function command on
Function key press Entry key press Description
the front panel display

LAN STATUS: < ><info> Press [Enter] to display the Display LAN connectivity status.
information for command with
< > symbol.
Use ▲ or ▼ to
navigate between DHCP: ON | OFF Use ▲ or ▼ to navigate Set DHCP for LAN.
the LAN Menu between ON | OFF.
function Press [Enter] to save.
commands. AUTO DNS: ON | OFF Use ▲ or ▼ to navigate Set auto DNS for LAN.
between ON | OFF.
Press [Enter] to save.
MDNS: ON | OFF Use ▲ or ▼ to navigate Set MDNS for LAN.
between ON | OFF.
Press [Enter] to save.

IP: < ><info> Press [Enter] to display the Display IP address.

information for command with
< > symbol.

SUBNET: < ><info> Press [Enter] to display the Display subnet address.
information for command with
< > symbol.

GATEWAY: < ><info> Press [Enter] to display the Display gateway address.
information for command with
< > symbol.

Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide 83
4 Front Panel Operation

Function command on
Function key press Entry key press Description
the front panel display

DNS 1: < ><info> Press [Enter] to display the Display DNS1 address.
information for command with
< > symbol.
Use ▲ or ▼ to
navigate between DNS 2: < ><info> Press [Enter] to display the Display DNS2 address.
the LAN Menu information for command with
function < > symbol.
commands. HOSTNAME: < ><info> Press [Enter] to display the Display ac source hostname.
information for command with
< > symbol.

DOMAIN NAME: < ><info> Press [Enter] to display the Display ac source domain name.
information for command with
< > symbol.

IP CONF: < ><value> Press [Enter] then use keypad Configure IP address only when DHCP
to key in an exact value. is OFF.

SUBNET CONF: < ><value> Press [Enter] then use keypad Configure Subnet address only when
to key in an exact value. DHCP is OFF.

GATEWAY CONF: < ><value> Press [Enter] then use keypad Configure Subnet address only when
to key in an exact value. DHCP is OFF.

DNS 1 CONF: < ><value> Press [Enter] then use keypad Configure DNS 1 address only when
to key in an exact value. AUTO DNS is OFF.

DNS 2 CONF: < ><value> Press [Enter] then use keypad Configure DNS 2 address only when
to key in an exact value. AUTO DNS is OFF.
UPDATE? YES | NO Use ▲ or ▼ to navigate Update the configuration.
between YES | NO.
Press [Enter] to execute.
CONFIRM? YES | NO Use ▲ or ▼ to navigate Reset the LAN configuration to factory
between YES | NO. default conditions.
Press [Enter] to execute.

84 Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide
 Front Panel Operation 4

Meter display keys

Metering keys control the metering functions of the ac source.

If is displayed, press [Enter] to display the information for the command or

NOTE
save the command settings.

If and are displayed use ▲ or ▼ of the Function keys or Entry keys to scroll
up or down to display the information.

Function command on
Function key press Entry key press Description
the front panel display
<reading> V <reading> Hz - Display rms voltage and frequency.
<reading> V <reading> A - Display rms voltage and rms current.
Use ▲ or ▼ to <reading> A <reading> Hz - Display rms current and frequency.
navigate between
<reading> V <reading> W - Display rms voltage and power.
the Meter function
commands. <reading> CREST F - Display current crest factor.
<reading> A PK REP - Display peak current, repetitive.
<reading> A PK NR - Display peak current, non-repetitive.
<reading> VA - Display apparent power.
<reading> VAR - Display reactive power.
<reading> PFACTOR - Display power factor.
INP:COUP AC | DC | ACDC Use ▲ or ▼ to navigate Select meter coupling.
between AC | DC | ACDC.
Press [Enter] to save.
Use ▲ or ▼ to
navigate between CURR:RANGE HIGH | LOW Use ▲ or ▼ to navigate Select current measurement range.
the Input function between HIGH | LOW.
commands. Press [Enter] to save.
WINDOW KBESSEL | RECT Use ▲ or ▼ to navigate Select harmonic measurement
between KBESSEL | RECT. window meter.
Press [Enter] to save.

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4 Front Panel Operation

Function command on
Function key press Entry key press Description
the front panel display
<reading> A I:MAG: <index> - Display current harmonic magnitude.
<reading>° I:PHASE: <index> - Display current harmonic phase.
Use ▲ or ▼ to <reading> V V:MAG: <index> - Display voltage harmonic magnitude.
navigate between
<reading>° V:PHASE: <index> - Display voltage harmonic phase.
the Harmonic
function <reading> CURR:THD - Display current total % harmonic
commands. distortion.
<reading> VOLT:THD - Display voltage total % harmonic
Press [Shift] then distortion.
▲ or ▼ to
increment or
decrement the
index of the
Harmonic function
commands.

86 Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide
 Front Panel Operation 4

Output control keys

Output control keys control the output functions of the ac source.

If is displayed, press [Enter] to display the information for the command or

NOTE
save the command settings.

If and are displayed use ▲ or ▼ of the Function keys or Entry keys to scroll
up or down to display the information.

Function command on
Function key press Entry key press Description
the front panel display
VOLT <value> Use the keypad to key in an Set immediate AC output voltage.
exact value, alternatively use ▲
to increment or ▼ to
Use ▲ or ▼ to decrement.
navigate between Press [Enter] to save.
the Voltage
function VOLT:T <value> Use the keypad to key in an Set triggered output voltage.
commands. exact value, alternatively use ▲
to increment or ▼ to
decrement.
Press [Enter] to save.
VOLT:M FIXED | LIST | PULSE | Use ▲ or ▼ to navigate Select the voltage mode.
STEP between FIXED | LIST | PULSE |
STEP.
Press [Enter] to save.
OFFSET <value> Use the keypad to key in an Set immediate DC offset voltage.
exact value, alternatively use ▲
to increment or ▼ to
decrement.
Press [Enter] to save.

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4 Front Panel Operation

Function command on
Function key press Entry key press Description
the front panel display
OFFSET:T <value> Use the keypad to key in an Set triggered DC offset voltage.
exact value, alternatively use ▲
to increment or ▼ to
Use ▲ or ▼ to decrement.
navigate between Press [Enter] to save.
the Voltage
function OFFSET:M FIXED | LIST | PULSE | Use ▲ or ▼ to navigate Select the DC offset voltage mode.
commands. STEP between FIXED | LIST | PULSE |
STEP.
Press [Enter] to save.
SLEW <value> Use the keypad to key in an Set voltage slew in V/sec.
exact value, alternatively use ▲
to increment or ▼ to
decrement.
Press [Enter] to save.
SLEW:T <value> Use the keypad to key in an Set triggered voltage slew in V/sec.
exact value, alternatively use ▲
to increment or ▼ to
decrement.
Press [Enter] to save.
SLEW:M FIXED | LIST | PULSE | Use ▲ or ▼ to navigate Select the voltage slew mode
STEP between FIXED | LIST | PULSE |
STEP.
Press [Enter] to save.
OFF:SLW <value> Use the keypad to key in an Set DC offset slew in V/sec.
exact value, alternatively use ▲
to increment or ▼ to
decrement.
Press [Enter] to save.
OFF:SLW:T <value> Use the keypad to key in an Set triggered DC offset slew in V/sec.
exact value, alternatively use ▲
to increment or ▼ to
decrement.
Press [Enter] to save.
OFF:SLW:M FIXED | LIST | Use ▲ or ▼ to navigate Select the voltage slew mode.
PULSE | STEP between FIXED | LIST | PULSE |
STEP.
Press [Enter] to save.

88 Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide
 Front Panel Operation 4

Function command on
Function key press Entry key press Description
the front panel display
ALC INT | EXT Use ▲ or ▼ to navigate Select the voltage sense source.
between INT | EXT.
Press [Enter] to save.
Use ▲ or ▼ to
navigate between ALC:DET RTIME | RMS Use ▲ or ▼ to navigate Select the voltage sense detector.
the Voltage between RTIME | RMS.
function Press [Enter] to save.
commands.
CURR:LEV <value> Use the keypad to key in an Set immediate rms current limit.
exact value, alternatively use ▲
to increment or ▼ to
Use ▲ or ▼ to decrement.
navigate between Press [Enter] to save.
the Current
function CURR:PEAK <value> Use the keypad to key in an Set immediate peak current limit.
commands. exact value, alternatively use ▲
to increment or ▼ to
decrement.
Press [Enter] to save.
CURR:PEAK:T <value> Use the keypad to key in an Set triggered peak current limit.
exact value, alternatively use ▲
to increment or ▼ to
decrement.
Press [Enter] to save.
CURR:PEAK:M FIXED | LIST | Use ▲ or ▼ to navigate Select the peak current limit mode.
PULSE | STEP between FIXED | LIST | PULSE |
STEP.
Press [Enter] to save.

Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide 89
4 Front Panel Operation

Function command on
Function key press Entry key press Description
the front panel display
FREQ <value> Use the keypad to key in an Set immediate output frequency.
exact value, alternatively use ▲
to increment or ▼ to
Use ▲ or ▼ to decrement.
navigate between Press [Enter] to save.
the Freq function
commands. FREQ:T <value> Use the keypad to key in an Set triggered output frequency.
exact value, alternatively use ▲
to increment or ▼ to
decrement.
Press [Enter] to save.
FREQ:M FIXED | LIST | PULSE | Use ▲ or ▼ to navigate Select the frequency mode.
STEP between FIXED | LIST | PULSE |
STEP.
Press [Enter] to save.
SLEW <value> Use the keypad to key in an Set frequency slew in Hz/sec.
exact value, alternatively use ▲
to increment or ▼ to
decrement.
Press [Enter] to save.
SLEW:T <value> Use the keypad to key in an Set triggered frequency slew Hz/sec.
exact value, alternatively use ▲
to increment or ▼ to
decrement.
Press [Enter] to save.
SLEW:M FIXED | LIST | PULSE | Use ▲ or ▼ to navigate Select the frequency slew mode.
STEP between FIXED | LIST | PULSE |
STEP.
Press [Enter] to save.

90 Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide
 Front Panel Operation 4

Function command on
Function key press Entry key press Description
the front panel display
PHASE <value> Use the keypad to key in an Set immediate output phase.
exact value, alternatively use ▲
to increment or ▼ to
Use ▲ or ▼ to decrement.
navigate between Press [Enter] to save.
the Phase function
commands. PHASE:T <value> Use the keypad to key in an Set triggered output phase.
exact value, alternatively use ▲
to increment or ▼ to
decrement.
Press [Enter] to save.
PHASE:M FIXED | LIST | PULSE | Use ▲ or ▼ to navigate Select the phase mode.
STEP between FIXED | LIST | PULSE |
STEP.
Press [Enter] to save.
SHAPE SINE | SQUARE | CSIN | Use ▲ or ▼ to navigate Set immediate waveform shape.
<user> between SINE | SQUARE | CSIN |
<user>.
Use ▲ or ▼ to Press [Enter] to save.
navigate between
the Shape function SHAPE:T SINE | SQUARE | CSIN | Use ▲ or ▼ to navigate Set triggered waveform shape.
commands. <user> between SINE | SQUARE | CSIN |
<user>.
Press [Enter] to save.
SHAPE:M FIXED | LIST | PULSE | Use ▲ or ▼ to navigate Set waveform shape mode.
STEP between FIXED | LIST | PULSE |
STEP.
Press [Enter] to save.
CLIP <value> Use the keypad to key in an Set clipping level.
exact value, alternatively use ▲
to increment or ▼ to
decrement.
Press [Enter] to save.

Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide 91
4 Front Panel Operation

Function command on
Function key press Entry key press Description
the front panel display
WIDTH <value> Use the keypad to key in an Set the pulse width.
exact value, alternatively use ▲
to increment or ▼ to
Use ▲ or ▼ to decrement.
navigate between Press [Enter] to save.
the Pulse function
commands. COUNT <value> Use the keypad to key in an Set the number of output pulses.
exact value, alternatively use ▲
to increment or ▼ to
decrement.
Press [Enter] to save.
DCYCLE <value> Use the keypad to key in an Set the pulse duty cycle.
exact value, alternatively use ▲
to increment or ▼ to
decrement.
Press [Enter] to save.
PER <value> Use the keypad to key in an Set the pulse period count.
exact value, alternatively use ▲
to increment or ▼ to
decrement.
Press [Enter] to save.
HOLD WIDTH | DCYCLE Use ▲ or ▼ to navigate Set parameter that is held constant.
between WIDTH | DCYCLE.
Press [Enter] to save.
OUTP:COUP AC | DC Use ▲ or ▼ to navigate Select output coupling.
between AC | DC.
Press [Enter] to save.
Use ▲ or ▼ to
navigate between RST Press [Enter] to execute. Execute the *RST command.
the Output TTLT:SOUR BOT | EOT | LIST Use ▲ or ▼ to navigate Select trigger out source coupling.
function between BOT | EOT | LIST.
commands.
Press [Enter] to save.
TTLT:STATE ON | OFF Use ▲ or ▼ to navigate Set trigger out state.
between ON | OFF.
Press [Enter] to save.

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 Front Panel Operation 4

Function command on
Function key press Entry key press Description
the front panel display
IMP:STATE ON | OFF Use ▲ or ▼ to navigate Set output impedance programming.
between ON | OFF.
Press [Enter] to save.
Use ▲ or ▼ to
navigate between IMP:REAL <value> Use the keypad to key in an Set real part of output impedance.
the Output exact value, alternatively use ▲
function to increment or ▼ to
commands. decrement.
Press [Enter] to save.
IMP:REAC <value> Use the keypad to key in an Set reactive part of output impedance.
exact value, alternatively use ▲
to increment or ▼ to
decrement.
Press [Enter] to save.
PON:STATE RST | RCL0 Use ▲ or ▼ to navigate Select power-on state command.
between RST | RCL0.
Press [Enter] to save.
RI LATCHING | OFF | LIVE Use ▲ or ▼ to navigate Set remote inhibit mode.
between LATCHING | OFF | LIVE.
Press [Enter] to save.
DFI ON | OFF Use ▲ or ▼ to navigate Set discrete fault indicator state.
between ON | OFF.
Press [Enter] to save.
DFI:SOUR QUES | OPER | ESB | Use ▲ or ▼ to navigate Select the DFI source.
RQS | OFF between QUES | OPER | ESB |
RQS | OFF.
Press [Enter] to save.

Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide 93
4 Front Panel Operation

Protection and status control keys

The Protect and Status keys control the protection functions and status registers
of the ac source. Refer to “Chapter 4” of the Keysight Models 6811C, 6812C, and
6813CAC Power Solutions Programming Guide for more information on the status
registers.

If is displayed, press [Enter] to display the information for the command or

NOTE
save the command settings.

If and are displayed use ▲ or ▼ of the Function keys or Entry keys to scroll
up or down to display the information.

Function command on
Function key press Entry key press Description
the front panel display
PROT:CLEAR Press [Enter] to execute. Clear latched protection signal.
CURR:PROT ON | OFF Use ▲ or ▼ to navigate Set overcurrent protection function.
between ON | OFF.
Use ▲ or ▼ to
navigate between Press [Enter] to save.
the Protect VOLT:PROT ON | OFF Use ▲ or ▼ to navigate Set overvoltage protection function.
function between ON | OFF.
commands. Press [Enter] to save.
VOLT:PROT <value> Use the keypad to key in an Set overvoltage protection level.
exact value, alternatively use ▲
to increment or ▼ to
decrement.
Press [Enter] to save.
DELAY <value> Use the keypad to key in an Set a time delay for activating a
exact value, alternatively use ▲ protection fault.
to increment or ▼ to
decrement.
Press [Enter] to save.

94 Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide
 Front Panel Operation 4

Function command on
Function key press Entry key press Description
the front panel display

CLS Press [Enter] to execute. Execute the *CLS command.

STATUS:PRESET Press [Enter] to execute. Execute STATus:PRESet command.

Use ▲ or ▼ to ESR? <value> Press [Enter] to display the Return event status register value.
navigate between information for the command.
the Status function
commands. STB <value> - Return status byte register value.

OPER:EVEN? <value> Press [Enter] to display the Return STAT:OPER:EVENT? value.

information for the command.
OPER:COND <value> - Return STAT:OPER:COND? value.
QUES:EVEN? <value> Press [Enter] to display the Return STAT:QUES:EVENT? value.
information for the command.
QUES:COND <value> - Return STAT:QUES:COND? value.

Trigger and list control keys

The Trigger Control key controls output transient triggers. The List key controls
the generation of output lists. A list can contain up to 100 points, each of which
can specify an output change (or transient). Refer to “Chapter 4” of the Keysight
Models 6811C, 6812C, and 6813CAC Power Solutions Programming Guide for
more information about programming triggers and lists.

If is displayed, press [Enter] to display the information for the command or

NOTE
save the command settings.

If and are displayed use ▲ or ▼ of the Function keys or Entry keys to scroll
up or down to display the information.

Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide 95
4 Front Panel Operation

Function command on
Function key press Entry key press Description
the front panel display
INIT:IMMED Press [Enter] to execute. Initiate trigger immediately.
INIT:CONT ON | OFF Use ▲ or ▼ to navigate Initiate trigger continuously.
between ON | OFF.
Use ▲ or ▼ to
navigate between Press [Enter] to save.
the Trigger Control TRIG:SOUR BUS | IMM | TTLT | Use ▲ or ▼ to navigate Select transient trigger source.
function EXT between BUS | IMM | TTLT | EXT .
commands. Press [Enter] to save.
DELAY <value> Use the keypad to key in an Set trigger delay in seconds.
exact value, alternatively use ▲
to increment or ▼ to
decrement.
Press [Enter] to save.
ABORT Press [Enter] to execute. Abort all trigger sequences.
SYNC:SOUR PHASE | IMM Use ▲ or ▼ to navigate Select synchronous trigger source.
between PHASE | IMM.
Press [Enter] to save.
SYNC:PHASE <value> Use the keypad to key in an Set synchronous phase reference.
exact value, alternatively use ▲
to increment or ▼ to
decrement.
Press [Enter] to save.

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 Front Panel Operation 4

Function command on
Function key press Entry key press Description
the front panel display
COUNT <value> Use the keypad to key in an Set the number of times a list repeats.
exact value, alternatively use ▲
to increment or ▼ to
Use ▲ or ▼ to decrement.
navigate between Press [Enter] to save.
the List function
commands. DWEL: <index> <value> Use the keypad to key in an Set the list of output dwell times.
exact value, alternatively use ▲
to increment or ▼ to
Press [Shift] then decrement.
▲ or ▼ to
Press [Enter] to save.
increment or
decrement the FREQ: <index> <value> Use the keypad to key in an Set the list of output frequencies.
index of the List exact value, alternatively use ▲
function to increment or ▼ to
commands. decrement.
Press [Enter] to save.
FSLW: <index> <value> Use the keypad to key in an Set the list of output frequency slew
exact value, alternatively use ▲ rates.
to increment or ▼ to
decrement.
Press [Enter] to save.
IPK: <index> <value> Use the keypad to key in an Set the list of output peak current
exact value, alternatively use ▲ limits.
to increment or ▼ to
decrement.
Press [Enter] to save.
OFFS: <index> <value> Use the keypad to key in an Set the list of DC output voltages.
exact value, alternatively use ▲
to increment or ▼ to
decrement.
Press [Enter] to save.

Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide 97
4 Front Panel Operation

Function command on
Function key press Entry key press Description
the front panel display
OSLW: <index> <value> Use the keypad to key in an Set the list of DC offset voltage slew
exact value, alternatively use ▲ rate.
to increment or ▼ to
Use ▲ or ▼ to decrement.
navigate between Press [Enter] to save.
the List function
commands. PHASE: <index> <value> Use the keypad to key in an Set the list of output voltage phase
exact value, alternatively use ▲ angles.
to increment or ▼ to
Press [Shift] then decrement.
▲ or ▼ to
Press [Enter] to save.
increment or
decrement the
index of the List
function
commands.

98 Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide
 Front Panel Operation 4

Entry Keys
Refer to the examples later in this chapter for more details on the use of these
keys.

Figure 4-4 Entry Keys

These Entry keys let you scroll through choices in a parameter

list that apply to a specific command. Parameter lists are
circular; you can return to the starting position by continuously
pressing either key. If the command has a numeric range,
these keys increment or decrement the existing value.

to [0] through [9] are used for entering numeric values.

[.] is the decimal point.
For example, to enter 33.6, press: [3] [3] [.] [6] [Enter].

The backspace key deletes the last digit entered from the
keypad. This key lets you correct one or more wrong digits
before they are entered.

Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide 99
4 Front Panel Operation

This key executes the entered value or parameter of the

presently accessed command.
Until you press this key, the parameters you enter with the
other Entry keys are displayed but not entered into the ac
source.
– Before pressing [Enter] you can change or abort anything
previously entered into the display.
– After [Enter] is pressed, the ac source returns to Meter
mode in most cases. In Harmonic or List mode, the ac
source displays the next point in the list.
This key specifies an exponential power of 10. For example, the
value for 100 μs can be entered as either [.] [0] [0] [0] [1], or as
[1] [E] [–] [4].

This key, [–], is the minus sign.

This key aborts a keypad entry by clearing the value. This key is
convenient for correcting a wrong value or aborting a value
entry. The display then returns to the previously set function.
When editing a list, pressing [Clear Entry] truncates or clears
the list at the presently displayed list point.

This key accesses the calibration menu (Refer to Appendix B,

"Verification and Calibration" to calibrate your ac source).

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 Front Panel Operation 4

Examples of Front Panel Programming

You will find these examples on the following pages:
– “Example 1: Setting the output voltage amplitude” on page 102
– “Example 2: Setting the output frequency” on page 103
– “Example 3: Setting the DC offset” on page 104
– “Example 4: Setting a protection feature” on page 106
– “Example 5: Clearing protection conditions” on page 107
– “Example 6: Generating step, pulse, and list transients” on page 110
– “Example 7: Programming trigger delays and phase synchronization” on
page 117
– “Example 8: Using slew rates to generate waveforms” on page 119
– “Example 9: Measuring peak inrush current” on page 122
– “Example 10: Setting the GPIB address and RS-232 parameters” on page 125
– “Example 11: Saving and recalling operating states” on page 126
– “Example 12: Accessing the ac source information” on page 128
– “Example 13: Setting the LAN interface and accessing the LAN information” on
page 129
– “Example 14: Performing LAN reset” on page 131
The examples in the Keysight Models 6811C, 6812C, and 6813C AC Power
Solutions Programming Guide are similar to the ones in this section, except that
they use SCPI commands.

Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide 101
4 Front Panel Operation

1 Setting the output voltage amplitude

The maximum voltage that the ac source can output is limited by the peak value
NOTE of the waveform, which is 425 Vpeak. Since the output is programmed in units of
rms volts, the maximum value that can be programmed is dependent on the
peak-to-rms ratio of the selected waveform. For a sinewave, the maximum ac
voltage that can be programmed is 300 Vrms. For other waveforms the maximum
may be different.

When you turn on the ac source, the default output shape is a 60 Hz sinewave at
0 Vrms. There is no output from the ac source because the default output state is
OFF, as indicated by the Dis annunciator. Set the output to 120 Vrms as follows:

Action Display
You can set the voltage in any of three ways:
1 On the Function keypad, press [Voltage]. On VOLT 120
the Entry keypad, press [1] [2] [0] [Enter]. This
is the easiest way to enter an accurate value.
2 On the Function keypad, press [Voltage]. On VOLT 127
the Entry keypad, press ▲ or ▼ to increment or
decrement the existing value. This technique is
useful when you are making minor changes to
an existing value.
3 Rotate the front panel knob to obtain 120 V. 120 V 60 Hz
This method is best when you want to enter a
value without using the voltage menu.
Note: You will not see the new voltage on the
front panel meter unless the output is enabled.
To enable the output:
4 On the Function keypad, press [Output On/Off]. 120 V 60 Hz
The Dis annunciator will go off, indicating that
the voltage is now applied to the output
terminals.

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 Front Panel Operation 4

2 Setting the output frequency

When you turn on the ac source, the default output frequency is a 60 Hz.
Assuming the voltage output from Example 1 is in effect (120 Vrms sinewave),
change the frequency to 50 Hz as follows:

Action Display
You can set the frequency in the same way that you set the voltage:
1 On the Function keypad, press [Freq]. On the FREQ 50
Entry keypad, press [5] [0] [Enter].
2 On the Function keypad, press [Freq]. On the FREQ 50
Entry keypad, press ▲ or ▼ to increment or
decrement the existing value.
3 Rotate the front panel knob to obtain 50 Hz. FREQ 50
To verify the output, use the meter menu:
4 The Meter menu is presently displaying the 120 V 50 Hz
measured voltage and frequency of the selected
output phase. On the Function keypad, press ▲
or ▼ to scroll through all of the measurement
functions in the Meter Menu.

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4 Front Panel Operation

3 Setting the DC offset

Because the maximum voltage that the ac source can output is limited to 425
NOTE Vpeak, you cannot program a dc offset that will cause a previously programmed
ac voltage to exceed the 425 Vpeak limit (acpeak + offset 425 V).

The dc output capability of the ac source lets you independently control the dc
and ac components of the output voltage. Program a dc offset of 100 V as
follows:

Action Display
1 On the Function keypad, press [Voltage] and OFFSET 0
then press ▼ until you access the OFFSET
command.
2 On the Entry keypad, press [1] [0] [0] [Enter]. OFFSET 100
3 On the Function keypad, press [Shift] [Output] OUTP:COUP AC
to access the output coupling command.
Note: When the output coupling is set to ac, the
ac source regulates the dc output voltage to 0,
regardless of any programmed voltage offset.
4 On the Entry keypad, press ▼ and [Enter] to OUTP:COUP DC
change the output coupling to DC.
5 The ac source output now combines the 156 V 50 Hz
previously programmed ac rms voltage and the
dc offset voltage. This is indicated by the
OUTPUT AC+DC annunciator. The front panel
meter is measuring a 120 Vrms sinewave offset
by 100 Vdc. This is indicated by the METER
AC+DC annunciator.

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 Front Panel Operation 4

Action Display
To measure just the ac or just the dc portion of the output:
6 On the Function keypad, press [Input] to access INP:COUP ACDC
the metering functions.
7 On the Entry keypad, press ▼ until you access INP:COUP DC
the DC parameter and press [Enter]. This 100 V 50 Hz
changes the metering function to dc, which
measures just the dc portion of the output in
volts.
The meter annunciator indicates METER DC.
8 On the Function keypad, press [Input] again. On INP:COUP AC
the Entry keypad, press ▼ until you access AC 120 V 50 Hz
and press [Enter]. This changes the metering
function to ac, which measures just the ac
portion of the output in rms volts.
The meter annunciator indicates METER AC.

Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide 105
4 Front Panel Operation

4 Setting a protection feature

You can set the ac source to disable its output if it detects an overvoltage or
overcurrent fault condition. Other automatic fault conditions (such as
overtemperature) also will disable the output. Set the overcurrent protection
feature as follows:

Action Display
1 On the Function keypad, press [Protect]. PROT:CLEAR
2 On the Function keypad, press ▼ to obtain the CURR:PROT OFF
overcurrent command.
3 On the Entry keypad, press ▼ once to scroll to CURR:PROT ON
the ON parameter and press [Enter]. The OCP
annunciator will light, indicating that the
overcurrent protection circuit is on.
If you wish to set a time delay between the DELAY .1
detection of the fault and the disabling of the
output, scroll to the delay command on the
protection menu. The default delay is 100
milliseconds.
Enter the delay from the Entry keypad, such as DELAY .250
[.] [2] [5] [0] [Enter].
4 When you want to restore normal operation PROT:CLEAR
after the cause of the overcurrent condition
has been removed, scroll to the protection clear
command and press [Enter]. The OCP
annunciator then will go off.

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 Front Panel Operation 4

5 Clearing protection conditions

When the output Prot annunciator is on, the output of the ac source has turned
off due to one or more of the following conditions:

Table 4-1 Protection condition description, bit number, and weight

Annunciator Description Bit number Bit weight
OV Overvoltage protection has tripped 0 1
OCP RMS overcurrent protection has tripped 1 2
SOA Safe operating area has tripped 2 4
OT Overtemperature protection has tripped 4 16
RI An external remote inhibit signal has occurred 9 512
Rail Rail protection has tripped 11 2048

Action Display
1 You must first identify the cause of the
protection shutdown, and then eliminate its
cause before you can continue operating the
unit.
2 To identify the problem, press [Shift] [Status]. *CLS
3 On the Function keypad, press ▼ to obtain the
QUES:EVEN?
Questionable Event command.

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4 Front Panel Operation

Action Display
4 Press [Enter] to find out which bits have been QUES:EVEN 20
set in the Event Register.
Note: The value returned is the sum of all of the
binary weights of the bits that have been set.
For example, a value of 20 indicates that bit 2
(bit weight=4) and bit 4 (bit weight=16) have
been set. Refer to Table 4-1 for the bits and bit
weights that are assigned to the protection
conditions. Refer to Table 4-2 for information on
eliminating the cause of the protection
condition. Refer to “Chapter 4” in the Keysight
Models 6811C, 6812C, and 6813C AC Power
Solutions Programming Guide for a complete
discussion of the status system.

Table 4-2 Protection condition causes

Condition Action
OV condition Usually overvoltage conditions are caused by an external source forcing voltage
into the output of the ac source. Remove this external source to eliminate the
overvoltage. You can also program the overvoltage level to a higher value, or turn
the overvoltage protection off.
In other cases the output voltage may have exceeded the user-programmed
overvoltage level. In this case the unit may have inadvertently been programmed to
a voltage that exceeded the programmed overvoltage level. The
VOLTage:PROTection command sets the overvoltage protection level.
Note: The overvoltage protection level is programmed in peak, not rms volts.
OCP condition If the CURRent:PROTection:STATe command has been programmed to disable the
output when rms current limit is activated, the unit will shut down. The rms current
limit threshold is set by the CURRent command. In this case you must check to see
why the load is drawing more current than the limit that has been programmed by
the CURRent command.

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 Front Panel Operation 4

Table 4-2 Protection condition causes (continued)

Condition Action
SOA condition Protection circuits in the ac source let the load draw peak currents for short periods
of time that exceed the continuous capability of the unit. This allows loads that
require large inrush currents to turn on. The ac source will shut down if a
combination of peak current duration and internal component temperature exceeds
a predetermined limit.
When this occurs, it means that the load has been drawing peak output currents
that are beyond the capability of the ac source to supply for extended periods.
Slower output slew rates and reduced peak current limit settings can be used to
control the conditions that cause SOA shutdowns.
OT condition When the internal operating temperatures of the ac source exceed predetermined
thresholds, the output turns off. If this happens, you must let the unit cool down
before continuing operation.
RI condition If the Remote Inhibit input has been programmed to disable the output when it
receives an external signal, the unit will shut down. The Remote Inhibit input is set
by the OUTPut:RI:MODE command. In this case you must check to what external
event produced a signal on the RI input.
Rail condition The internal high voltage rail that provides power for the ac source's output is
continuously monitored for proper voltage level. If this voltage is not maintained
within predetermined levels, the output will shut down. This can happen if an
extenal source forces too much power into the ac source or if too much power is
drawn from the ac source.
Remove the external source to eliminate the rail condition. Slower output slew rates
and reduced peak current limit settings can also be used to control the conditions
that cause rail shutdowns.

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4 Front Panel Operation

6 Generating step, pulse, and list transients

The ac source voltage can be programmed in the following transient operating
modes:

Transient
Result
operating modes
STEP The output permanently change to its triggered value.
The output to change to its triggered value for a specific time, as determined by the
PULSE
Pulse menu parameters.
The output sequence through a number of values, as determined by points entered
LIST
in the List menu.
FIXED Disables transient operation for the selected function.

Step transient
The Voltage Menu lets you specify an alternate or triggered voltage level that the
ac source will apply to the output when it receives a trigger. Because the default
transient voltage level is zero volts, you must first enter a triggered voltage before
you can trigger the ac source to change the output amplitude. Refer to
“Chapter 4” of the Keysight Models 6811C, 6812C, and 6813C AC Power
Solutions Programming Guide for more information about programming triggers.
In the following example, the voltage output is set to 120 Vrms and then stepped
down to 102 Vrms.

Action Display
1 On the Function keypad, press [Output On/Off] 0V 60 Hz
to enable the output. The Dis annunciator will
go off.
2 Press [Voltage] to access the Voltage Menu. On VOLT 120
the Entry keypad, press [1] [2] [0] [Enter].
3 Access the Voltage Menu again and on the VOLT:T 0
Function keypad, press ▼ to access the
triggered voltage command.

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Action Display
4 On the Entry keypad, press [1] [0] [2] [Enter]. VOLT:T 102
5 Access the Voltage Menu again and on the VOLT:M STEP
Function keypad, press ▼ to access the voltage
mode command. It should be in the default
FIXED mode. An ac source function in the FIXED
mode does not respond to triggers. On the
Entry keypad, press ▼ to scroll through the
mode parameters. When you have STEP, press
[Enter].
6 Press [Trigger Control] and [Enter]. This INIT:IMMED
initiates (or enables) one immediate trigger
action.
7 Press [Shift] [Trigger]. This sends the ac source 102 V 60 Hz
an immediate trigger signal to change the
output voltage. The triggered voltage value now
becomes the VOLT value.

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Pulse transient
In the following example, the output is four 83.3-millisecond, 120 Vrms pulses at
60 Hz. The figure shows the trigger, pulse count, pulse period, and duty cycle.

From the Output Menu, execute the *RST command to reset the ac source. This
NOTE is necessary because any previously programmed functions remain in effect until
cleared.

Figure 4-5 Pulse transients

Action Display
1 Press [Voltage] to access the Voltage Menu. On VOLT 102
the Entry keypad, press [1] [0] [2] [Enter].
2 On the Function keypad, press ▼ to access the VOLT:T 120
triggered voltage command. On the Entry
keypad, press [1] [2] [0] [Enter].
3 Access the Voltage Menu again and on the VOLT:M PULSE
Function keypad, press ▼ to access the voltage
mode command. On the Entry keypad, press
▼to scroll through the mode parameters to
obtain PULSE and press [Enter].
4 Press [Pulse] to access the Pulse Menu. From WIDTH .0833
the Entry keypad, press [.] [0] [8] [3] [3] [Enter]
to enter a pulse width of 83.3 milliseconds.

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Action Display
5 Access the Pulse Menu and on the Function DCYCLE 33
keypad, press ▼ to access the duty cycle
command. From the Entry keypad, press [3] [3]
[Enter] to change the duty cycle to 33%.
6 Access the Pulse Menu and on the Function COUNT 4
keypad, press ▼ to access the pulse count. On
the Entry keypad, press [4] and [Enter].
7 Press [Trigger Control] and [Enter] to initiate INIT:IMMED
the transient trigger sequence.
8 Press [Shift] [Trigger]. This sends the ac source 102 V 60 HZ
an immediate trigger signal to generate the four
output pulses.
Note: The ac source output returns to 102 V at
the completion of the output pulses.

Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide 113
4 Front Panel Operation

List transient
Lists are the most flexible means of generating multiple or synchronized transient
outputs. The following figure shows a voltage output generated from a list. The
output shown represents three different ac voltage pulses (160 volts for 33
milliseconds, 120 volts for 83 milliseconds, and 80 volts for 150 milliseconds)
separated by 67-millisecond, 0-volt intervals.
The list specifies the pulses as three voltage points (point 0, 2, and 4), each with
its corresponding dwell point. The intervals are three zero-voltage points (point 1,
3, and 5) of equal intervals. The count parameter causes the list to execute twice
when started by a single trigger.

From the Output Menu, execute the *RST command to reset the ac source. This
NOTE is necessary because any previously programmed functions remain in effect until
cleared.

Figure 4-6 List transients

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Action Display
1 Press [Voltage] to access the Voltage Menu. VOLT:M FIXED
Then on the Entry keypad, press ▼ to access
the voltage mode command.
2 On the Entry keypad, press ▲ or ▼ to scroll VOLT:M LIST
through the mode parameters to obtain LIST
and press [Enter].
3 Access the List Menu by pressing [Shift] [List]. COUNT 2
The first menu command is the count. From the
Entry keypad, change the list count from the
default (1) to [2]. Press [Enter].
4 Access the List menu again and on the Function DWEL 0 .033
keypad, press ▼ until you access the dwell
time. This specifies the “on” time for each
voltage point, which is effectively the output
pulse width. The first dwell point (0) appears in
the display. On the Entry keypad, press [.] [0]
[3] [3] and [Enter].
5 Pressing the [Enter] key automatically advances DWEL 1 .067
to the step in the list. Enter the following values DWEL 2 .083
for dwell list points 1 through 5: .067, .083, DWEL 3 .067
.067, .150, .067. Press [Enter] to enter each DWEL 4 .150
value. When you finish, you will be at point 6, DWEL 5 .067
which is the end of the list. DWEL 6 EOL
Note: Press [Shift] [▲ Index] or [Shift]
[▼ Index] to access and edit any list point.
6 On the Function keypad, press ▼ until you VOLT 0 160
access the voltage list. This specifies the
amplitude of each output point during its
corresponding dwell period. The first voltage
list point (0) appears in the display. On the Entry
keypad, press [1] [6] [0] and [Enter].

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Action Display
7 Pressing the [Enter] key automatically advances VOLT 1 0
to the step in the list. Enter the following values VOLT 2 120
for voltage list points 1 through 5: 0, 120, 0, 80, VOLT 3 0
0. Press [Enter] to enter each value. When you VOLT 4 80
finish, you will be at point 6, which is the end of VOLT 5 0
the list. VOLT 6 EOL
Note: Press [Shift] [▲ Index] or [Shift]
[▼ Index] to access and edit any list point.
8 On the Function keypad, press ▼ until you STEP AUTO
access the step command. Check that it is at
the default mode (AUTO). This lets a single
trigger run your list for the specified count.
9 Press [Output On/Off] to enable the output. The 0V 60 Hz
Dis annunciator will go off.
10 Press [Trigger Control] and [Enter] to initiate INIT:IMMED
the transient trigger sequence.
11 Press [Shift] [Trigger]. This sends the ac source 0 V 60 Hz
an immediate trigger to generate the four
output pulses. The output returns to the
immediate value at the end of the list.
Note: To clear a list, press [Clear Entry]. This
truncates or clears the list at the presently
displayed list point. Each list must be accessed
and cleared separately.

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7 Programming trigger delays and phase synchronization

The ac source trigger system also lets you program trigger delays as well as
synchronize output changes to a specific phase angle of the output waveform.
In Example 1, the output transient is triggered immediately at the receipt of the
trigger signal. In Example 2, a delay time of approximately 16.7 milliseconds
elapses between the occurrence of the trigger and the start of the output
transient. In Example 3, the trigger source is programmed for phase
synchronization, which means that the transient occurs at the first occurrence of
the specified phase angle after the trigger signal is received.
Note that phase synchronization is referenced to an internal phase signal. The
output of the unit is normally offset by 0° with respect to this internal reference.
Because synchronized transient events always occur with respect to the internal
reference, the output will normally be in phase with the value programmed for
phase synchronization. (The Phase command can be used to change the offset of
the output with respect to the internal phase reference.)

Figure 4-7 Trigger delays and phase synchronization

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4 Front Panel Operation

Action Display
1 This example uses the default trigger VOLT 120
parameters. First, access the Voltage menu and VOLT:T 150
program the immediate and triggered voltage VOLT:M STEP
levels, followed by the voltage transient mode.
Then press [Trigger Control] and [Enter], INIT:IMMED
followed by [Shift] [Trigger].
2 In this example, you will set a trigger delay. VOLT 120
First, access the Voltage menu and program the VOLT:T 150
immediate and triggered voltage levels, VOLT:M STEP
followed by the voltage transient mode.
Press [Trigger Control]. Then on the Function DELAY 0
keypad, press ▼ until you access the delay DELAY .0167
parameter. On the Entry keypad, press [.] [0] [1]
[6] [7] [Enter].
Then press [Trigger Control] and [Enter], INIT:IMMED
followed by [Shift] [Trigger].
3 This example uses the phase sync mode with no VOLT 120
delay, but synchronized at 90. First, access the VOLT:T 150
Voltage menu and program the immediate and VOLT:M STEP
triggered voltage levels, followed by the voltage
transient mode.
Press [Trigger Control]. Then on the Function DELAY 0
keypad, press ▼ until you access the delay SYNC:SOUR PHASE
parameter. If necessary, set it to 0. On the
Function keypad, press ▼ until you access the
sync source command. On the Entry keypad,
press ▼ to obtain PHASE. Press [Enter].
Access the Trigger Control menu again and on SYNC:PHAS 90
the Function keypad, press ▼ to access the
sync phase reference parameter. On the Entry
keypad, program a 90° phase reference by
entering [9] [0] [Enter].
Then press [Trigger Control] and [Enter], INIT:IMMED
followed by [Shift] [Trigger].

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8 Using slew rates to generate waveforms

As shown in the previous examples there are a number of ways that you can
generate custom waveforms. Programmable slew rates provide additional
flexibility when customizing waveforms. The following figure illustrates how
programmable slew rates are applied in the transient operating modes.
In Example 1, an immediate slew rate of 50 volts/second is used whenever a new
output voltage is programmed. In Example 2, a triggered slew rate of 50 volts/
second steps the voltage level to its new value. 50 volts/second becomes the new
immediate slew rate in step mode. In Example 3, a triggered slew rate of 50 volts/
second is used at the start of the pulse. The immediate slew rate of infinity applies
at the trailing edge of the pulse. In Example 4, the slew rates are set by the values
in the voltage slew list.

Figure 4-8 Programming slew rates

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4 Front Panel Operation

Action Display
1 This example uses the immediate slew rate. VOLT:M FIXED
First, access the Voltage menu and on the
Function keypad, press ▼ until you access the
mode command. On the Entry keypad, press ▼
to obtain FIXED. Press [Enter].
Access the voltage menu and on the Function SLEW 50
keypad, press ▼ until you access the slew
command. On the Entry keypad, press [5] [0]
[Enter] to program a slew rate of 50 volts/
second.
Whenever a new immediate voltage value is
entered, the output will slew to the new level at
50 volts/second.
2 Step mode uses the triggered slew rate. First, VOLT 120
access the Voltage menu, program the VOLT:T 150
immediate and triggered voltage levels, and set SLEW:M STEP
the slew mode to STEP.
Access the Voltage menu and on the Function SLEW 9.9+E37
keypad, press ▼ to access the immediate slew
command. On the Entry keypad, enter a value
that equals infinity.
Access the Voltage menu and on the Function SLEW:T 50
keypad, press ▼ until you access the triggered
slew command. On the Entry keypad, enter a
value such as [5] [0] [Enter], which sets the
triggered slew rate to 50 volts/second.
Then press [Trigger Control] and [Enter], INIT:IMMED
followed by [Shift] [Trigger].
After the trigger has been sent, in step mode,
the triggered value becomes the new
immediate value.

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Action Display
3 Pulse mode uses the triggered slew rate at the VOLT 120
leading edge of the pulse, and the immediate VOLT:T 150
slew rate at the trailing edge of the pulse. First, SLEW:M PULSE
access the Voltage menu, program the
immediate and triggered voltage levels, and set
the slew mode to PULSE.
Access the Pulse menu and program the pulse COUNT 2
count, duty cycle, and pulse period. DCYCLE 33
PER .0166
Access the Voltage menu and on the Function SLEW 9.9+E37
keypad, press ▼ to access the immediate slew
command. On the Entry keypad, enter a value
that equals infinity.
Access the Voltage menu and on the Function SLEW:T 50
keypad, press ▼ until you access the triggered
slew command. On the Entry keypad, enter a
value such as [5] [0] [Enter], which sets the
triggered slew rate to 50 volts/second.
Then press [Trigger Control] and [Enter], INIT:IMMED
followed by [Shift] [Trigger].
4 When the voltage slew mode is set to LIST, the
slew rates are set by the values in the voltage
slew list. Refer to the List Transient example for
more information on how to program lists. You
must program the voltage values and dwell
times as explained in that example. You must
also program a slew rate for each point in the
list (even if it is 9.9+E37).

When specifying a dwell time, you must take the slew time into consideration. If
NOTE the dwell time at any given list point is less than the slew time at the same point,
the voltage will never reach its programmed level before the next list point
becomes active.

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9 Measuring peak inrush current

Peak inrush current is a non-repetitive measurement whereby the peak inrush
current occurs only when the unit under test is first turned on. In order to repeat
the measurement, you must turn the unit off and wait for any input filter
capacitors to discharge completely.
This example shows how you can measure the peak inrush current using the front
panel meter. The voltage is set to 120 Vrms and the output is triggered at an
output phase of 75°, which optimizes the conditions under which inrush current is
applied to the unit under test.

Action Display
1 Set the immediate voltage to 0. Press [Voltage], VOLT 0
then press [0] and [Enter].
2 Set the triggered voltage to 120 Vrms. In the VOLT:T 120
Voltage menu, on the Function keypad, press ▼
to access the triggered voltage command. Then
press [1] [2] [0] [Enter].
3 Set the voltage mode to step. In the Voltage VOLT:M STEP
menu, on the Function keypad, press ▼ to
access the mode command. On the Entry
keypad, press ▼ to scroll to STEP and press
[Enter].
4 Make sure the triggered voltage slew rate is set SLEW:T 9.9000+E37
to the fastest possible speed. In the Voltage
menu, access the triggered slew command. If
necessary, reset the slew rate to a faster speed.

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Action Display
5 Make sure the peak current and rms current CURR:LEV 6.5
limits are set to high values. In the Current CURR:PEAK 40
menu, access the rms current limit and then the
peak current limit commands. If necessary,
reset the rms current and the peak current limits
to higher values.
(Keysight 6811C units have an rms current limit
of 3.25 A. Keysight 6813C units have an rms
current limit of 13 A and a peak current limit of
80 A.)
6 Synchronize the trigger source with a reference SYNC:SOUR PHASE
phase angle. In the Trigger Control menu, on
the Function keypad, press ▼ to access the
sync source command. On the Entry keypad,
press ▼ to obtain PHASE and press [Enter].
7 Set the reference phase angle to 75. In the SYNC:PHAS 75
Trigger Control menu, on the Function keypad,
press ▼ to access the sync phase command.
Then press [7] [5] [Enter].
8 Initiate (or enable) the unit for one immediate INIT:IMMED
trigger from the front panel. Press [Trigger
Control] and [Enter].
9 Set the meter function to measure 0A PK NR
non-repetitive peak inrush current. In the Meter
menu, on the Function keypad, press ▼ to
access the peak inrush current display.
10 Enable the output by pressing [Output On/Off]. 0 V 60 HZ
11 Send the trigger to step the output from 0 V to 48 A PK NR
120 V. Press [Shift] [Trigger]. The inrush current
is displayed on the Meter.

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4 Front Panel Operation

With fast and/or large voltage transitions, the CC annunciator may turn on due
NOTE to current in the output capacitor. This is normal and will limit the rate of change
of output voltage. To prevent the CC operating mode from limiting the rate of
change of output voltage, program the peak current limit to a higher value.

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10 Setting the GPIB address and RS-232 parameters

Your ac source is shipped with the GPIB address set to 5. This address can only be
changed from the front panel using the Address menu located under the
[Address] key. This menu is also used to specify RS-232 parameters such baud
rate and parity.

Action Display
To set the GPIB address, proceed as follows:
1 On the System keypad, press [Address]. ADDRESS 5
2 Enter the new address. For example, Press [7] ADDRESS 7
[Enter].
To configure the RS-232 interface, proceed as follows:
1 On the System keypad, press [Address]. ADDRESS 5
2 Scroll through the Address menu by pressing ▼ BAUDRATE 1200
on the Function keypad. The baudrate PARITY EVEN
command selects the baudrate. The parity
command selects the parity.
3 The ▲ and ▼ keys on the Entry keypad lets you
select the command parameters.

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11 Saving and recalling operating states

You can save up to 16 states (from location 0 to location 15) in non-volatile
memory and recall them from the front panel. All programmable settings are
saved. List data, however, cannot be saved in state storage. Only one list is saved
in non-volatile memory.

Action Display
To save an operating state in location 1, proceed as follows:
1 Set the instrument to the operating state that
you want to save.
2 Save this state to location 1. Press [Shift] [Save] *SAV 1
[1] [Enter].
To recall a saved state in location 1, proceed as follows:
1 Recall the state saved in location 1 by pressing *RCL 1
[Recall] [1] [Enter].
To select the power-on state of the ac source, proceed as follows:
1 On the Function keypad, press [Shift] [Output], PON:STATE RST
and scroll through the Output menu until you
get to the PON state command.
2 Use the ▲ and ▼ keys on the Entry keypad to
select either RST or RCL0. RST sets the
power-on state of the unit as defined by the
*RST command. RCL0 sets the power-on state
of the unit to the state saved in *RCL location 0.
To clear the non-volatile memory of the ac source, proceed as follows:
1 On the Function keypad, press [Shift] [Output] *RST
and scroll to the *RST command. Then press
[Enter]. This returns the unit to the
factory-default settings.
2 Save these settings to location 1. Press [Shift] *SAV 1
[Save] [1] [Enter].

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Action Display
3 Repeat step 2 for memory locations 2 through *SAV 2
15. *SAV 3
*SAV 4
.
.
*SAV 15

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4 Front Panel Operation

12 Accessing the ac source information

You can display the ac source basic information such as model, option, serial
number, firmware revision, media access control (MAC) address, USB vendor
identification (VID), and USB product identification (PID).

Action Display
To display the ac source basic information, proceed as follows:
1 Press [Shift] [Info].
2 Use the ▲ and ▼ keys on the Function keypad MODEL: 6811C
to access the ac source basic information.

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13 Setting the LAN interface and accessing the LAN information

You can set the LAN interface and access the LAN information.

Action Display
To configure the LAN, proceed as follows:
1 Press [Shift] [LAN Menu]. LAN STATUS:
2 Use the ▲ and ▼ keys on the Function keypad DHCP: OFF
to display DHCP. Use the ▲ and ▼ keys on the
Entry keypad to turn DHCP:OFF. Then press
[Enter].
3 Use the ▲ and ▼ keys on the Function keypad
to display IP CONF, SUBNET CONF, or
GATEWAY CONF. Then press [Enter] to
configure IP CONF, SUBNET CONF, or
GATEWAY CONF. Enter the respective
configuration using the keypad of the Entry key
group.
4 Use the ▲ and ▼ keys on the Function keypad UPDATE? NO
to display the update option.
5 Use the ▲ and ▼ keys on the Entry keypad to UPDATE? YES
allow update. Then press [Enter].
To configure DNS 1 and DNS 2 after you turn off auto DNS, proceed as follows:
1 Press [Shift] [LAN Menu]. LAN STATUS:
2 Use the ▲ and ▼ keys on the Function keypad AUTO DNS: OFF
to display AUTO DNS. Use the ▲ and ▼ keys on
the Entry keypad to turn AUTO DNS: OFF. Then
press [Enter].
3 Use the ▲ and ▼ keys on the Function keypad
to display DNS 1 CONF or DNS 2 CONF. Then
press [Enter] to configure DNS 1 CONF or DNS
2 CONF. Enter the respective configuration
using the keypad of the Entry key group.

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4 Front Panel Operation

Action Display
4 Use the ▲ and ▼ keys on the Function keypad UPDATE? NO
to display the update option.
5 Use the ▲ and ▼ keys on the Entry keypad to UPDATE? YES
allow update. Then press [Enter].
To view LAN information, proceed as follows:
1 Press [Shift] [LAN Menu].
2 Use the ▲ and ▼ keys on the Function keypad LAN STATUS:
to access the LAN information of the ac source.

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14 Performing LAN reset

You can reset the LAN settings.

Action Display
To reset the LAN settings, proceed as follows:
1 Press [Shift] [LAN Reset]. CONFIRM? NO
2 Use the ▲ and ▼ keys on the Entry keypad to CONFIRM? YES
confirm the LAN reset. Then press [Enter].

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 Keysight Models 6811C, 6812C, and 6813C AC Power Solutions
User’s and Service Guide

5 Remote Control and

Firmware Update
Remote Control 134
Basic Firmware Update Utility Instructions for Keysight 681XC Series 139

133
5 Remote Control and Firmware Update

Remote Control
There are two ways to control the ac source.
– Program the instrument via SCPI, use Keysight IO Libraries.
– Control the instrument via a simulated front panel, use the instrument's Web
interface.

Keysight IO Libraries Suite

Keysight IO Libraries Suite is a collection free instrument control software that
automatically discovers instruments and allows you to control instruments over
the LAN, USB, GPIB, RS-232, and other interfaces. For more information, or to
download IO Libraries, go to www.keysight.com/find/iosuite.

6811C/6812C/6813C Web interface

You can monitor control the instrument from a Web browser by using the
instrument's Web interface. To connect, simply enter the instrument's IP address
or hostname in your browser's address bar and hit Enter.

If you see an error indicating 400: Bad Request, this is related to an issue with
NOTE “cookies” in your Web browser. To avoid this issue, either start the Web interface
by using the IP address (not host name) in the address bar, or clear cookies from
your browser immediately before starting the Web interface.

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 Remote Control and Firmware Update 5

Figure 5-1 Connect ac power source to simulated front panel

Check the checkbox below the picture of the instrument to enable an indicator on
the instrument's front panel. This is helpful if you have several 681XC Series
instruments and you wish to identify the one to which you are connected.
The Configure LAN tab on the top allows you to change the instrument's LAN
parameters; exercise caution when doing so, as you may interrupt your ability to
communicate with the instrument.

Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide 135
5 Remote Control and Firmware Update

Figure 5-2 Soft front panel

When you click the Control Instrument tab, the instrument will ask you for a
password (default is keysight and not case sensitive), and then it will open a new
page.
This interface allows you to use the instrument just as you would from the front
panel. Note the curved arrow keys that allow you to “turn” the knob.

Read warning.
NOTE
Be sure to read and understand the warning at the top of the Control Instrument
page.

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 Remote Control and Firmware Update 5

Special Symbols

Press [Enter] to display the information

for the command.

Press [Enter] to save the command

settings.

Press the ▲ or ▼ keys of the Function

or Entry keypads to display the
information.

Using Telnet
In an MS-DOS Command Prompt box type: telnet hostname 5024 where
hostname is the instrument’s hostname or IP address, and 5024 is the
instrument’s telnet port.
You should get a Telnet session box with a title indicating that you are connected
to the power system. Type the SCPI commands at the prompt.

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5 Remote Control and Firmware Update

Using Sockets

AC sources allow up to two simultaneous data socket, two control socket, and
NOTE two telnet connections to be made.

Keysight instruments have standardized on using port 5025 for SCPI socket
services. A data socket on this port can be used to send and receive ASCII/SCPI
commands, queries, and query responses. All commands must be terminated with
a newline for the message to be parsed. All query responses will also be
terminated with a newline.
The socket programming interface also allows a control socket connection. The
control socket can be used by a client to send device clear and to receive service
requests. Unlike the data socket, which uses a fixed port number, the port number
for a control socket varies and must be obtained by sending the following SCPI
query to the data socket: SYSTem:COMMunicate:TCPip:CONTrol?
After the port number is obtained, a control socket connection can be opened. As
with the data socket, all commands to the control socket must be terminated with
a newline, and all query responses returned on the control socket will be
terminated with a newline.
To send a device clear, send the string “DCL” to the control socket. When the
power system has finished performing the device clear it echoes the string “DCL”
back to the control socket.
Service requests are enabled for control sockets using the Service Request Enable
register. Once service requests have been enabled, the client program listens on
the control connection. When SRQ goes true the instrument will send the string
“SRQ +nn” to the client. The “nn” is the status byte value, which the client can use
to determine the source of the service request.

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 Remote Control and Firmware Update 5

Basic Firmware Update Utility Instructions for Keysight 681XC

Series
The following lists the prerequisite information, installation procedure, and
firmware update error troubleshooting.
The following are the prerequisite information for the basic firmware update utility
instructions for Keysight 681XC series.
– Do not update more than one 681X Series unit at a time.
– For Windows XP, the tool requires Service pack 3 onwards.
– Download and install the Keysight Basic Firmware Update Utility Tool.
– Go to C:\Program Files(x86)\Keysight\BasicFirmwareUpdate\Driver and open
either one of the following folders:
– x64 folder (for 64-bit PCs)
– x86 folder (for 32-bit PCs)
– Run one of the following to install the USB driver:
– dpinst_amd64.exe (for 64-bit PCs)
– dpinst_x86.exe (for 32-bit PCs)
– Download the firmware update (*.dfu) file.

Be sure to execute the firmware update procedure only under conditions of

NOTE reliable power and I/O connectivity to the instrument. For example, do not
update firmware with an intermittent LAN connection, a loose power cord, or
during a thunderstorm that may interrupt power. Loss of power or connectivity
may cause the firmware update to fail, possibly leading to instrument
inoperability.

The example shown is for a 681xC Series Instrument, but these instructions
NOTE apply to any instrument that uses the Keysight Basic Firmware Update Utility.

Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide 139
5 Remote Control and Firmware Update

Installation procedure
1 Double-click on the FirmwareUpdate.exe file to launch the Keysight Basic
Firmware Update Utility. Then click Browse to find the firmware update file to
load onto your instrument.

Figure 5-3 Keysight Basic Firmware Update Utility

140 Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide
 Remote Control and Firmware Update 5

2 Browse to find the firmware update file (*.dfu). Then click Open.

Figure 5-4 Keysight Basic Firmware Update Utility

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5 Remote Control and Firmware Update

3 Check the Description: on the lower left corner of the window to verify that the
file applies to the proper instrument. Then click Next.

Figure 5-5 Check description

142 Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide
 Remote Control and Firmware Update 5

4 Enter the appropriate LAN Sockets, LAN VISA, USB, or GPIB connection
information for your instrument. Then click Update.

– The ac source does not support updating firmware from instrument's front
NOTE panel.
– DO NOT use Recovery mode during normal firmware update instruction.

Figure 5-6 Update the interface to perform update

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5 Remote Control and Firmware Update

5 Verify the information shown on the screen and click Begin Update.

Figure 5-7 Begin update after verifying information

6 The utility tools will copy the firmware update file to the instrument. The utility
will then erase the current firmware and write the new firmware into memory.
7 The instrument will automatically restart itself with the new firmware. The
utility will verify that the memory has been written correctly.

Click Update another instrument to update another instrument with same

NOTE firmware.

144 Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide
 Remote Control and Firmware Update 5

Figure 5-8 Successfully updated firmware

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5 Remote Control and Firmware Update

Troubleshooting firmware update error

1 If the firmware update was interrupted or unsuccessful, click OK and Restart
Firmware Update to retry.

Figure 5-9 Firmware update failed

146 Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide
 Remote Control and Firmware Update 5

2 Repeat step 1 to step 3 from Installation procedure. Select Recover corrupted

firmware (USB only) and provide the model number (6811C, 6812C, or
6813C). Then click Update.

Figure 5-10 Recover corrupted firmware (USB only)

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5 Remote Control and Firmware Update

3 Verify the information shown on the screen and click Begin Update.

Figure 5-11 Begin update after verifying information from recovery of

corrupted firmware

4 If the tools prompt you to enter boot loader, turn the ac source off. Press and
hold [Trigger Control], [Output On/Off] and [.] keys on the front panel while
you turn the ac source on.

Figure 5-12 Enter boot loader using the ac source

148 Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide
 Remote Control and Firmware Update 5

Ensure the instrument front panel indicates BOOTLOADER before you click OK.
NOTE

Figure 5-13 After entering boot loader, click OK

5 The utility will copy the firmware update file to the instrument and write the
new firmware into memory.
6 The instrument will automatically restart itself with the new firmware. The
utility will verify that the memory has been written correctly.

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5 Remote Control and Firmware Update

Figure 5-14 Successfully updated firmware from troubleshooting

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 Keysight Models 6811C, 6812C, and 6813C AC Power Solutions
User’s and Service Guide

A Specifications
For the characteristics and specifications of the Keysight Models 6811C, 6812C, and 6813C
AC Power Solutions, refer to the data sheet at http://literature.cdn.keysight.com/litweb/
pdf/5992-2370EN.pdf.

151
A Specifications

THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK.

152 Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide
 Keysight Models 6811C, 6812C, and 6813C AC Power Solutions
User’s and Service Guide

B Verification and Calibration

Introduction 154
Performing the Verification Tests 157
Performing the Calibration Procedure 164
Front Panel Calibration 166
Changing the Calibration Password 174
Calibration Error Messages 175
Calibration Over the GPIB 176

153
B Verification and Calibration

Introduction
This appendix includes verification and calibration procedures for the Keysight
Models 6811C, 6812C, and 6813C AC Power Solutions. Instructions are given for
performing the procedures either from the front panel or from a controller over the
GPIB.
The verification procedures do not check all the operating parameters, but verify
that the ac source is performing properly.
Because the output of the ac source must be enabled during verification or
calibration, proceed with caution, since voltages and currents will be active at the
output terminals.

Perform the verification procedures before calibrating your ac source. If the ac

NOTE source passes the verification procedures, the unit is operating within its
calibration limits and does not need to be recalibrated.

LETHAL VOLTAGES. AC sources can supply 424 Vpeak at their output. DEATH
WARNING
on contact may result if the output terminals or circuits connected to the
output are touched when power is applied. These procedures must be
performed by a qualified electronics technician or engineer trained on this
equipment.

TENSIONS MORTELLES. Les AC source peuvent fournir 424 Vmaximum au

niveau de leur sortie. Tout contact peut entraîner la MORT si les circuits ou
bornes de sorties connectés à la sortie sont touchés lorsqu'ils sont sous
tension. Ces procédures doivent être réalisées par un ingénieur ou
technicien en électronique qualifié formé sur l'équipement.

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 Verification and Calibration B

Equipment required
The equipment listed in the following table, or the equivalent to this equipment, is
required for verification and calibration.

Table B-1 Equipment required

Equipment Characteristics Recommended model
Resolution: 10 nV @ 1 V
Digital voltmeter Readout: 8.5 digits Keysight 3458A
Accuracy: >20 ppm

Current monitor[a] 0.01 Ω, 200 ppm, 10 Watts Guildline 7320/0.01

Ratio transformer[b] 30:1 ratio, 50 ppm, 45 Hz to 1 kHz

10 Ω, 20A, 2000 Watts minimum for

Keysight 6811C/6812C/6813C
Load resistor
5 Ω, 20A, 2000 Watts minimum for
Keysight 6813C Option 019
Impedance resistor 1 Ω, 100 Watts minimum
GPIB controller Full GPIB capabilities Keysight 82375B GPIB/USB

[a] The 4- terminal current shunt is used to eliminate output current measurement error caused by voltage drops in
the load leads and connections. It has special current-monitoring terminals inside the load connection terminals.
Connect the voltmeter directly to these current-monitoring terminals.
[b] A ratio transformer is required only when verifying output voltage readback to MIL-STD-45662A 4:1 test
equipment ratio requirements.

Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide 155
B Verification and Calibration

Test setup
Figure B-1 shows the setup for the tests. Be certain to use load leads of sufficient
wire gauge to carry the full output current (see Chapter 2, "Installation").

Figure B-1 Verification and calibration test setup

156 Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide
 Verification and Calibration B

Performing the Verification Tests

The following procedures assume you understand how to operate the ac source
from the front panel as explained in Chapter 4, " Front Panel Operation".
When performing the verification tests from a GPIB controller, you may have to
consider the relatively slow settling times and slew rates of the ac source as
compared to computer and system voltmeters. Suitable WAIT statements can be
inserted into the test program to give the ac source time to respond to the test
commands.
Perform the following tests for operation verification in the order indicated.
1 Turn-on checkout procedure
2 AC voltage programming and measurement accuracy and DC voltage
programming and measurement accuracy
3 RMS current accuracy test

Turn-on checkout procedure

Perform the turn-on checkout as directed in Chapter 3, "Turn-On Checkout".

The ac source must pass turn-on self-test before you can proceed with the
NOTE verification tests.

AC voltage programming and measurement accuracy

This test verifies the voltage programming, GPIB measurement, and front panel
meter functions. Values read back over the GPIB should be the same as those
displayed on the front panel.
If more than one meter or if a meter and an oscilloscope are used, connect each to
the sense terminals by separate leads to avoid mutual coupling effects.

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B Verification and Calibration

Action Normal result

1 Make sure the ac source is turned off. Connect
the DMM and ratio transformer as shown in the
test setup in Figure B-1.
2 Turn on the ac source with no load. In the CV annunciator on.
Output menu, execute the *RST command to Output current near 0.
reset the unit. Enable the output by pressing
[Output On/Off]. Program the output voltage as
follows:
VOLT 300, FREQ 45, SHAPE:SIN, CURR 1

3 Record voltage readings at the DMM[a] and on Readings within specified

the front panel display. high range limits
(300 V/45 Hz).
4 Program FREQ 400
5 Record voltage readings at the DMM1 and on Readings within specified
the front panel display. high range limits
(300 V/400 Hz).
6 Program FREQ 1000, CURR:PEAK 40

7 Record voltage readings at the DMM[a] and on Readings within specified

the front panel display. high range limits
(300 V/1 kHz).
[a] Multiply the DMM reading by the transformer ratio if a ratio transformer is used.

158 Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide
 Verification and Calibration B

DC voltage programming and measurement accuracy

Disconnect the ratio transformer for this test.

NOTE

This test verifies the DC voltage programming, GPIB readback, and front panel
meter functions. Values read back over the GPIB should be the same as those
displayed on the front panel. Connect the negative terminal of the DMM to the
COM output terminal to determine the DC offset voltages.

Action Normal result

1 Make sure the ac source is turned off. Connect
the DMM directly to the sense terminals.
2 Turn on the ac source with no load. In the Output voltage at
Output menu, execute the *RST command to +425 VDC
reset the unit. Enable the output by pressing Output current near 0.
[Output On/Off]. Program the output voltage as
follows:
VOLT 0, OUTP:COUP DC, OFFSET 425
3 Record DC voltage readings at the DMM and on Readings within specified
the front panel display. dc voltage programming
and readback limits.
4 Program OFFSET –425 Output voltage at
–425 VDC
5 Record DC voltage readings at the DMM and on Readings within specified
the front panel display. dc voltage programming
and readback limits.

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B Verification and Calibration

RMS current accuracy test

This test verifies the accuracy of the current measurement in rms detection mode.

Action Normal result

1 Turn off the ac source and connect the DMM,
the 20 ohm load resistor and current shunt as
shown in Figure B-1 with S1 closed. Connect
the DMM across the current shunt.
2 Turn on the ac source. In the Output menu, CC annunciator on
execute the *RST command to reset the unit. Output current at 2.5 A
Enable the output by pressing [Output On/Off]. (Keysight 6811C) or 5.0 A
Program the output as follows: (all other models).
For Keysight 6811C:
VOLT 60, CURR:RANGE LOW, CURR:LEV 2.50
For all other models:
VOLT 120, CURR:RANGE LOW, CURR:LEV 5.00
3 Record the DMM voltage reading and calculate Readings within specified
the rms current. limits.
4 Program CURR:RANGE HIGH CC annunciator on
Output current at 2.5 A
(Keysight 6811C) or 5.0 A
(all other models).
5 Record the DMM voltage reading and calculate Readings within specified
the rms current. limits.

160 Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide
 Verification and Calibration B

Table B-2 Keysight 6811C verification test record

Model Keysight 6811C Report number_______________ Date________________
Test description Minimum specification Recorded results Maximum specification
Voltage programming and measurement accuracy

____________V
300 Vrms accuracy at 45 Hz 299.250 V 300.750 V
Front panel measurement Vrms 190 m Vrms +190 mV
____________V

____________V
300 Vrms accuracy at 400 Hz 298.200 V 301.800 V
Front panel measurement Vrms 400 mV Vrms +400 mV
____________V

____________V
300 Vrms accuracy at 1 kHz 296.700 V 303.300 V
Front panel measurement Vrms 700 mV Vrms +700 mV
____________V

DC programming and measurement accuracy

____________V
425 VDC accuracy 424.075 V 425.925 V
Front panel measurement VDC 0.363 V Vrms +0.363 V
____________V

____________V
425 VDC accuracy 424.075 V 425.925 V
Front panel measurement VDC 0.363 V Vrms +0.363 V
____________V

RMS current measurement accuracy

Low range Iout 0.00275 A ____________A Iout +0.00275 A

High range Iout 0.01125 A Iout +0.01125 A
(Iout = calculated output current @ 60 Hz) ____________A

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B Verification and Calibration

Table B-3 Keysight 6812C verification test record

Model Keysight 6812C Report number_______________ Date________________
Test description Minimum specification Recorded results Maximum specification
Voltage programming and measurement accuracy

____________V
300 Vrms accuracy at 45 Hz 299.250 V 300.750 V
Front panel measurement Vrms 190 mV Vrms +190 mV
____________V

____________V
300 Vrms accuracy at 400 Hz 298.200 V 301.800 V
Front panel measurement Vrms 400 mV Vrms +400 mV
____________V

____________V
300 Vrms accuracy at 1 kHz 296.700 V 303.300 V
Front panel measurement Vrms 700 mV Vrms +700 mV
____________V

DC programming and measurement accuracy

____________V
425 VDC accuracy 424.075 V 425.925 V
Front panel measurement VDC 0.363 V Vrms +0.363 V
____________V

____________V
425 VDC accuracy 424.075 V 425.925 V
Front panel measurement VDC 0.363 V Vrms +0.363 V
____________V

RMS current measurement accuracy

Low range Iout 0.0040 A ____________A Iout +0.0040 A

High range Iout 0.0125 A Iout +0.0125 A
(Iout = calculated output current @ 60 Hz) ____________A

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 Verification and Calibration B

Table B-4 Keysight 6813C verification test record

Model Keysight 6813C Report number_______________ Date________________
Test description Minimum specification Recorded results Maximum specification
Voltage programming and measurement accuracy

____________V
300 Vrms accuracy at 45 Hz 299.250 V 300.750 V
Front panel measurement Vrms 190 mV Vrms +190 mV
____________V

____________V
300 Vrms accuracy at 400 Hz 298.200 V 301.800 V
Front panel measurement Vrms 400 mV Vrms +400 mV
____________V

____________V
300 Vrms accuracy at 1 kHz 296.700 V 303.300 V
Front panel measurement Vrms 700 mV Vrms +700 mV
____________V

DC programming and measurement accuracy

____________V
425 VDC accuracy 422.575 V 427.425 V
Front panel measurement VDC 0.363 V Vrms +0.363 V
____________V

____________V
425 VDC accuracy 422.575 V 427.425 V
Front panel measurement VDC 0.363 V Vrms +0.363 V
____________V

RMS current measurement accuracy

Low range Iout 0.0040 A ____________A Iout +0.0040 A

High range Iout 0.0125 A Iout +0.0125 A
(Iout = calculated output current @ 60Hz) ____________A

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B Verification and Calibration

Performing the Calibration Procedure

Table B-1 lists the equipment required for calibration. Figure B-1 shows the test
setup.

You do not have to do a complete calibration each time. You may calibrate only
NOTE the voltage or current and proceed to “Saving the calibration constants” on
page 173. However, before you calibrate OVP, you must first calibrate the output
voltage.

The following parameters may be calibrated:

– AC output voltage
– output voltage measurement
– overvoltage protection (OVP)
– AC output current
– output current measurement
– output impedance
Before calibrating the output impedance, you must first calibrate the output
voltage and the output current.

164 Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide
 Verification and Calibration B

Front panel calibration menu

The Entry keypad is used for calibration functions.

Press this key to access the calibration menu.

Display Command function

CAL ON <value> Turns calibration mode on when the correct password value
is entered.
CAL OFF Turns calibration mode off.
CAL:LEV <char> Advance to next step in sequence (P1, P2, P3, or P4).
CAL:DATA <value> Input a calibration measurement.
CAL:VOLT:OFFSET Begin voltage offset calibration.
CAL:VOLT:DC Begin dc voltage calibration sequence.
CAL:VOLT:AC Begin ac voltage calibration sequence.
CAL:VOLT:PROT Begin voltage protection calibration.
CAL:CURR:AC Begin ac current calibration sequence.
CAL:CURR:MEAS Begin current measurement calibration sequence.
CAL:IMP Begin output impedance calibration sequence.
CAL:SAVE Saves the calibration constants in non-volatile memory.
CAL:PASS <value> Set new calibration password.

Notes:
– value = a numeric value
– char = a character string parameter
– Press ▲ and ▼ of the Function key group to scroll through the command list.
– Press ▲ and ▼ of the Entry key group to scroll through the parameter list.

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B Verification and Calibration

Front Panel Calibration

LETHAL VOLTAGES. AC sources can supply 424 Vpeak at their output. DEATH
WARNING
on contact may result if the output terminals or circuits connected to the
output are touched when power is applied. These procedures must be
performed by a qualified electronics technician or engineer trained on this
equipment.

TENSIONS MORTELLES. Les AC source peuvent fournir 424 Vmaximum au

niveau de leur sortie. Tout contact peut entraîner la MORT si les circuits ou
bornes de sorties connectés à la sortie sont touchés lorsqu'ils sont sous
tension. Ces procédures doivent être réalisées par un ingénieur ou
technicien en électronique qualifié formé sur l'équipement.

The following procedures assume you understand how to operate front panel keys
(see Chapter 4, " Front Panel Operation").

Enable calibration mode

Action Display
1 Reset the unit by selecting [Output], scrolling to *RST
the *RST command and pressing [Enter].
2 To begin calibration press [Shift] [Calibration], CAL ON 0.0
scroll to CAL ON and press [Enter].
3 Enter the calibration password from Entry
keypad and press [Enter]. If the password is
correct the Cal annunciator will come on.
If CAL DENIED appears, then an internal switch CAL DENIED
has been set to prevent the calibration from
being changed.
If the password is incorrect, an error occurs.
If the active password is lost, the calibration OUT OF RANGE
function can be recovered by setting an internal
switch that defeats password protection.

166 Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide
 Verification and Calibration B

Calibrating and entering voltage offset values

Connect the negative terminal of the DMM to the COM output terminal. Note that
some calibration points are negative; be sure to enter the CAL:DATA as negative
values when required.

Action Display
1 Connect the DMM (dc volts mode) directly to
the ac source. Do not connect the ratio
transformer or load resistor shown in
Figure B-1.
2 Press [Shift] [Calibration], scroll to the CAL CAL:VOLT:OFFSET
VOLT OFFSET command, and press [Enter].
3 Press [Shift] [Calibration], scroll to the CAL LEV CAL:LEV P1
P1 command, and press [Enter] to select the
first calibration point.
4 Press [Shift] [Calibration], scroll to CAL DATA CAL:DATA 0.00
0.00, and use the Entry keypad to enter the DC
voltage value displayed on the DMM.
5 Press [Shift] [Calibration], scroll to the CAL LEV CAL:LEV P2
P1 command, use ▼ on the Entry keypad to
scroll to the P2 parameter, and press [Enter].
This selects the second calibration point.
6 Press [Shift] [Calibration], scroll to CAL DATA CAL:DATA 0.00
0.00, and use the Entry keypad to enter the DC
voltage value displayed on the DMM.
7 Press [Shift] [Calibration], scroll to the CAL LEV CAL:LEV P3
P1 command, use ▼ on the Entry keypad to
scroll to the P3 parameter, and press [Enter].
8 Press [Shift] [Calibration], scroll to CAL DATA CAL:DATA 0.00
0.00, and use the Entry keypad to enter the DC
voltage value displayed on the DMM.

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B Verification and Calibration

Action Display
9 Press [Shift] [Calibration], scroll to the CAL LEV CAL:LEV P4
P1 command, use ▼ on the Entry keypad to
scroll to the P4 parameter, and press [Enter].
10 Press [Shift] [Calibration], scroll to CAL DATA CAL:DATA 0.00
0.00, and use the Entry keypad to enter the DC
voltage value displayed on the DMM.

The ac source is now holding the new voltage offset calibration constants in RAM.

Calibrating and entering DC voltage gain values

Connect the negative terminal of the DMM to the COM output terminal. Note that
some calibration points are negative; be sure to enter the CAL:DATA as negative
values when required.

Action Display
1 Connect the DMM (dc volts mode) directly to
the ac source. Do not connect the ratio
transformer or load resistor shown in
Figure B-1.
2 Press [Shift] [Calibration], scroll to the CAL CAL:VOLT:DC
VOLT DC command, and press [Enter].
3 Press [Shift] [Calibration], scroll to the CAL LEV CAL:LEV P1
P1 command, and press [Enter] to select the
first calibration point.
4 Press [Shift] [Calibration], scroll to CAL DATA CAL:DATA 0.00
0.00, and use the Entry keypad to enter the DC
voltage value displayed on the DMM.
5 Press [Shift] [Calibration], scroll to the CAL LEV CAL:LEV P2
P1 command, use ▼ on the Entry keypad to
scroll to the P2 parameter, and press [Enter].
This selects the second calibration point.

168 Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide
 Verification and Calibration B

Action Display
6 Press [Shift] [Calibration], scroll to CAL DATA CAL:DATA 0.00
0.00, and use the Entry keypad to enter the DC
voltage value displayed on the DMM.
7 Press [Shift] [Calibration], scroll to the CAL LEV CAL:LEV P3
P1 command, use ▼ on the Entry keypad to
scroll to the P3 parameter, and press [Enter].
8 Press [Shift] [Calibration], scroll to CAL DATA CAL:DATA 0.00
0.00, and use the Entry keypad to enter the DC
voltage value displayed on the DMM.

The ac source is now holding the new dc voltage gain calibration constants in
RAM.

Calibrating and entering AC rms voltage gain values

Action Display
1 Connect the DMM (ac volts mode) directly to
the ac source using the ratio transformer shown
in Figure B-1.
2 Press [Shift] [Calibration], scroll to the CAL CAL:VOLT:AC
VOLT AC command, and press [Enter].
3 Press [Shift] [Calibration], scroll to the CAL LEV CAL:LEV P1
P1 command, and press [Enter] to select the
first calibration point.
4 Press [Shift] [Calibration], scroll to CAL DATA CAL:DATA 0.00
0.00, and use the Entry keypad to enter the
product of the transformer ratio times the AC
voltage value displayed on the DMM.
5 Press [Shift] [Calibration], scroll to the CAL LEV CAL:LEV P2
P1 command, use ▼ on the Entry keypad to
scroll to the P2 parameter, and press [Enter].
This selects the second calibration point.

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B Verification and Calibration

Action Display
6 Press [Shift] [Calibration], scroll to CAL DATA CAL:DATA 0.00
0.00, and use the Entry keypad to enter the
product of the transformer ratio times the AC
voltage value displayed on the DMM.
7 Press [Shift] [Calibration], scroll to the CAL LEV CAL:LEV P3
P1 command, use ▼ on the Entry keypad to
scroll to the P3 parameter, and press [Enter].
8 Press [Shift] [Calibration], scroll to CAL DATA CAL:DATA 0.00
0.00, and use the Entry keypad to enter the
product of the transformer ratio times the AC
voltage value displayed on the DMM.
9 Press [Shift] [Calibration], scroll to the CAL LEV CAL:LEV P4
P1 command, use ▼ on the Entry keypad to
scroll to the P4 parameter, and press [Enter].
10 Press [Shift] [Calibration], scroll to CAL DATA CAL:DATA 0.00
0.00, and use the Entry keypad to enter the
product of the transformer ratio times the AC
voltage value displayed on the DMM.

The ac source is now holding the new ac rms voltage calibration constants in
RAM.

170 Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide
 Verification and Calibration B

Calibrating the OVP trip point

Action Display
1 Press [Shift] [Calibration], scroll to the CAL CAL:VOLT:PROT
VOLT PROT command, and press [Enter].
2 Wait for the ac source to compute the OVP
calibration constant. The display returns to
Meter mode when the OVP calculation is
complete.

The ac source is now holding the new OVP calibration constants in RAM.

Calibrating and entering rms current values

Action Display
1 Connect the DMM (ac rms mode), current
shunt, and load resistor as shown in Figure B-1
with S1 closed.
2 Press [Shift] [Calibration], scroll to the CAL CAL:CURR:AC
CURR AC command, and press [Enter].
3 Press [Shift] [Calibration], scroll to the CAL LEV CAL:LEV P1
P1 command, and press [Enter].
4 Press [Shift] [Calibration], scroll to CAL DATA CAL:DATA 0.00
0.00 command. Calculate the rms current value
(DMM ac rms voltage/shunt resistance), and
use the Entry keypad to enter the rms current.
5 Press [Shift] [Calibration], scroll to the CAL LEV CAL:LEV P2
P1 command, use ▼ on the Entry keypad to
scroll to the P2 parameter, and press [Enter].

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B Verification and Calibration

Action Display
6 Press [Shift] [Calibration], scroll to CAL DATA CAL:DATA 0.00
0.00 command. Calculate the rms current value
(DMM ac rms voltage/shunt resistance), and
use the Entry keypad to enter the rms current.

The ac source is now holding the new rms current calibration constants in RAM.

Calibrating and entering rms current measurement values

Action Display
1 Connect the DMM (ac rms mode), current
shunt, and load resistor as shown in Figure B-1
with S1 closed.
2 Press [Shift] [Calibration], scroll to the CAL CAL:CURR:MEAS
CURR MEAS command, and press [Enter].
3 Press [Shift] [Calibration], scroll to the CAL LEV CAL:LEV P1
P1 command, and press [Enter].
4 Press [Shift] [Calibration], scroll to CAL DATA CAL:DATA 0.00
0.00 command. Calculate the rms current value
(DMM ac rms voltage/shunt resistance), and
use the Entry keypad to enter the rms current.
5 Press [Shift] [Calibration], scroll to the CAL LEV CAL:LEV P2
P1 command, use ▼ on the Entry keypad to
scroll to the P2 parameter, and press [Enter].
6 Press [Shift] [Calibration], scroll to CAL DATA CAL:DATA 0.00
0.00 command. Calculate the rms current value
(DMM ac rms voltage/shunt resistance), and
use the Entry keypad to enter the rms current.

The ac source is now holding the new rms current calibration constants in RAM.

172 Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide
 Verification and Calibration B

Calibrating the output impedance

Action Display
1 Connect only the output impedance resistor
across the output of the ac source. Do not
connect any other equipment.
2 Press [Shift] [Calibration], scroll to the CAL IMP CAL:IMP
command, and press [Enter].
3 Wait for the ac source to compute the output
impedance calibration constant. The display
returns to Meter mode when the calculation is
complete.

The ac source is now holding the new output impedance calibration constants in
RAM.

Saving the calibration constants

Storing calibration constants overwrites the existing ones in non-volatile

NOTE memory. If you are not sure you want to permanently store the new constants,
omit this step. The ac source calibration will then remain unchanged.

Action Display
1 Press [Shift] [Calibration], scroll to the CAL CAL:SAVE
SAVE command, and press [Enter].
2 Press [Shift] [Calibration], select CAL OFF, and CAL OFF
press [Enter] to exit Calibration mode. *RST and
*RCL will also set the calibration state to OFF.

Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide 173
B Verification and Calibration

Changing the Calibration Password

The factory default password is 0. You can change the password when the ac
source is in calibration mode (which requires you to enter the existing password).
Proceed as follows:

Action Display
1 Begin by pressing [Shift] [Calibration] and CAL ON 0.0
scrolling to the CAL ON command.
2 Enter the existing password from Entry keypad
and press [Enter].
3 Press [Shift] [Calibration] and scroll to the CAL CAL:PASS 0
PASS command.
4 Enter the new password from the keypad. You
can use any number with up to six digits and an
optional decimal point. If you want the
calibration function to operate without requiring
any password, change the password to 0 (zero).

If you want the calibration function to operate without requiring any password,
NOTE change the password to 0 (zero).

174 Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide
 Verification and Calibration B

Calibration Error Messages

Errors that can occur during calibration are shown in the following table.

Table B-5 GPIB calibration error messages

Error Meaning
401 CAL switch prevents calibration (This is a hardware disable)
402 CAL password is incorrect
403 CAL not enabled
404 Computed readback cal constants are incorrect
405 Computed programming cal constants are incorrect
406 Incorrect sequence of calibration commands

Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide 175
B Verification and Calibration

Calibration Over the GPIB

You can calibrate the ac source by using SCPI commands within your controller
programming statements. Be sure you are familiar with calibration from the front
panel before you calibrate from a controller. Each front panel calibration
command has a corresponding SCPI command.
The SCPI calibration commands are explained in “Chapter 3” of the Keysight
Models 6811C, 6812C, and 6813C AC Power Solutions Programming Guide.
Calibration error messages that can occur during GPIB calibration are shown in
Table B-5.

176 Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide
 Keysight Models 6811C, 6812C, and 6813C AC Power Solutions
User’s and Service Guide

C Error Messages
Error Number List 178

177
C Error Messages

Error Number List

This appendix gives the error numbers and descriptions that are returned by the
ac source. Error numbers are returned in two ways:
– Error numbers are displayed on the front panel
– Error numbers and messages are read back with the SYSTem:ERRor? query.
SYSTem:ERRor? returns the error number into a variable and returns two
parameters: an NR1 and a string.
The following table lists the errors that are associated with SCPI syntax errors and
interface problems. It also lists the device dependent errors. Information inside the
brackets is not part of the standard error message, but is included for clarification.
When errors occur, the Standard Event Status register records them in bit 2, 3, 4,
or 5:

Table C-1 Error numbers

Error number Error string [description/explanation/examples]
Command Errors –100 through –199 (sets Standard Event Status register bit #5)
–100 Command error [generic]
–101 Invalid character
–102 Syntax error [unrecognized command or data type]
–103 Invalid separator
–104 Data type error [e.g., “numeric or string expected, got block data”]
–105 GET not allowed
–108 Parameter not allowed [too many parameters]
–109 Missing parameter [too few parameters]
–112 Program mnemonic too long [maximum 12 characters]
–113 Undefined header [operation not allowed for this device]
–121 Invalid character in number [includes “9” in octal data, etc.]
–123 Numeric overflow [exponent too large; exponent magnitude >32 k]
–124 Too many digits [number too long; more than 255 digits received]

178 Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide
 Error Messages C

Table C-1 Error numbers (continued)

Error number Error string [description/explanation/examples]
–128 Numeric data not allowed
–131 Invalid suffix [unrecognized units, or units not appropriate]
–138 Suffix not allowed
–141 Invalid character data [bad character, or unrecognized]
–144 Character data too long
–148 Character data not allowed
–150 String data error
–151 Invalid string data [e.g., END received before close quote]
–158 String data not allowed
–160 Block data error
–161 Invalid block data [e.g., END received before length satisfied]
–168 Block data not allowed
–170 Expression error
–171 Invalid expression
–178 Expression data not allowed
Execution errors –200 through –299 (sets Standard Event Status register bit #4)
–200 Execution error [generic]
–221 Settings conflict [check current device state]
–222 Data out of range [e.g., too large for this device]
–223 Too much data [out of memory; block, string, or expression too long]
–224 Illegal parameter value [device-specific]
–225 Out of memory
–270 Macro error
–272 Macro execution error
–273 Illegal macro label
–276 Macro recursion error

Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide 179
C Error Messages

Table C-1 Error numbers (continued)

Error number Error string [description/explanation/examples]
–277 Macro redefinition not allowed
System Errors –300 through –399 (sets Standard Event Status register bit #3)
–310 System error [generic]
–350 Too many errors [errors beyond 9 lost due to queue overflow]
Query Errors –400 through –499 (sets Standard Event Status register bit #2)
–400 Query error [generic]
–410 Query INTERRUPTED [query followed by DAB or GET before response complete]
Query UNTERMINATED [addressed to talk, incomplete programming message
–420
received]
–430 Query DEADLOCKED [too many queries in command string]
–440 Query UNTERMINATED [after indefinite response]
Self-test Errors 0 through 99 (sets Standard Event Status register bit #3)
0 No error
1 Non-volatile RAM RD0 section checksum failed
2 Non-volatile RAM CONFIG section checksum failed
3 Non-volatile RAM CAL section checksum failed
4 Non-volatile RAM WAVEFORM section checksum failed
5 Non-volatile RAM STATE section checksum failed
6 Non-volatile RAM LIST section checksum failed
7 Non-volatile RAM RST section checksum failed
10 RAM self-test
11 - 31 DAC self-test error, expected <n>, read <reading>
40 Voltage self-test error, output 1
41 Voltage self-test error, output 2
42 Voltage self-test error, output 3
43 Current self-test error, output 1

180 Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide
 Error Messages C

Table C-1 Error numbers (continued)

Error number Error string [description/explanation/examples]
44 Current self-test error, output 2
45 Current self-test error, output 3
60 FPGA JTAG error
61 FPGA image invalid
62 Model Detection FPGA version invalid
63 Analog voltage rail failed
64 Model Detection FPGA model bit invalid
65 Model Detection EEPROM model checksum failed
66 Model Detection between FPGA and EEPROM incompatible
67 EEPROM version is higher than expected
70 Fan voltage failure
71 3.3V voltage failed
72 5V voltage failed
80 Digital I/O self-test error
90 Non-volatile RAM IO DATA section checksum failed
91 Non-volatile RAM ROM VERS section checksum failed
92 Non-volatile RAM SERIAL section checksum failed
93 Non-volatile RAM MAC ADDR section checksum failed
94 Non-volatile RAM LAN section checksum failed
95 Non-volatile RAM HTTP section checksum failed
96 Non-volatile RAM PERSONA section checksum failed
97 Non-volatile RAM CAL INFO section checksum failed
Device-Dependent Errors 100 through 32767 (sets Standard Event Status register bit #3)
200 Outgrd not responding
201 Front panel not responding
210 Ingrd receiver framing error

Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide 181
C Error Messages

Table C-1 Error numbers (continued)

Error number Error string [description/explanation/examples]
211 Ingrd uart overrun status
212 Ingrd received bad token
213 Ingrd receiver buffer overrun
214 Ingrd input buffer overrun
215 Outgrd output buffer overrun
216 RS-232 receiver framing error
217 RS-232 receiver parity error
218 RS-232 receiver overrun error
219 Ingrd inbuf count sync error
220 Front panel uart overrun
221 Front panel uart framing
222 Front panel uart parity
223 Front panel buffer overrun
224 Front panel timeout
401 CAL switch prevents calibration
402 CAL password is incorrect
403 CAL not enabled
404 Computed readback cal constants are incorrect
405 Computed programming cal constants are incorrect
406 Incorrect sequence of calibration commands
481 Model bit detection failed
501 LAN disconnect
502 LAN invalid IP address
503 LAN duplicate IP address
504 LAN failed to renew DHCP lease
505 LAN failed to configure

182 Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide
 Error Messages C

Table C-1 Error numbers (continued)

Error number Error string [description/explanation/examples]
506 LAN failed to initialize
507 LAN VXI-11 fault
600 Systems in mode:list have different list lengths
601 Requested voltage and waveform exceeds peak voltage capability
602 Requested voltage and waveform exceeds transformer volt-second rating
603 Command only applies to RS-232 interface
604 Trigger received before requested number of pre-trigger readings
605 Requested RMS current too high for voltage range
606 Waveform data not defined
607 VOLT, VOLT:SLEW, and FUNC:SHAP modes incompatible
608 Measurement overrange
609 Output buffer overrun
610 Command cannot be given with present SYST:CONF setting
614 Measurement error occurred
900 Firmware update failed

Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide 183
C Error Messages

THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK.

184 Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide
 Keysight Models 6811C, 6812C, and 6813C AC Power Solutions
User’s and Service Guide

D Option 019
2000 VA Output Capability 186
Specifications for Option 019 187

185
D Option 019

2000 VA Output Capability

The 2000 VA Output Capability Option 019 is available on the Keysight 6813C
Option 019 AC Power Source (2000VA).
Option 019 increases the output VA capability of the standard Keysight 6813C AC
Power Source from 1750 VA to 2000 VA. To achieve the increased output VA
capability, the output rms voltage, DC voltage and rms current ratings have
increased slightly, to the maximum ratings documented in Table D-1. The primary
restriction that this increased output imposes on Option 019 units as compared to
standard units, is the reduction in the output frequency range to between 45 and
100 Hz.

186 Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide
 Option 019 D

Specifications for Option 019

Table D-1 lists the specifications changes for units with Option 019. Performance
specifications are warranted over the ambient temperature range of 0 to 40 °C.
Unless otherwise noted, specifications are for a sine wave with a resistive load at a
frequency range of 45 Hz to 100 Hz, after a 30-minute warm-up.

Table D-1 Performance specifications

Parameter Keysight 6813C Option 019
Phases 1
Maximum Output Ratings
Power 2000 VA
DC power 1500 W
RMS voltage 308 V
DC voltage ±436 V
Isolation to ground 308 Vrms/436 Vdc

RMS current (in real-time mode) 16 A

DC current 10 A
Repetitive peak current 48 A
Non-repetitive peak current (inrush) 48 A
3 at 16 A
Crest factor (current)
(crest factor is higher at lower currents)
Output frequency range DC; 45 Hz to 100 Hz
Programming accuracy (rms detection mode at 25°C ± 5°C), ±(% of output + offset)
RMS voltage (45 to 100 Hz) 0.15% + 0.3 V
Frequency 0.01% + 10 μHz
DC voltage 0.5% + 0.3 V
Measurement accuracy (at 25 °C ± 5 °C), ±(% of output + offset)
RMS voltage (45 to 100 Hz) 0.03% + 100 mV

Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide 187
D Option 019

Table D-1 Performance specifications

Parameter Keysight 6813C Option 019
Frequency 0.01% + 0.01 Hz
DC voltage 0.03% + 150 mV

Table D-2 Supplemental characteristics

Parameter Keysight 6813C Option 019
AC input voltage range 230 Vac (±10%) (230 Vac nominal)
Net weight 30.1 kg (66.4 lbs)
Shipping weight 34.59 kg (76.26 lbs)

188 Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide
 Keysight Models 6811C, 6812C, and 6813C AC Power Solutions
User’s and Service Guide

E Option 020
Keysight Dual Power Analyzer Description 190
Front Panel Menus - Additions 192
Rear Panel Connections 193
Installation 194
Front Panel Programming 201
Power Analyzer Input Specifications 205
Verification Procedure 209
Calibration Procedure 213

189
E Option 020

Keysight Dual Power Analyzer Description

The Keysight Dual Power Analyzer Option 020 is available on the following ac
sources:
– Keysight 6811C AC Power Source (375VA)
– Keysight 6812C AC Power Source (750VA)
– Keysight 6813C AC Power Source (1750VA)
Option 020 consists of an additional Power Analyzer input on the back of the ac
source, an external current shunt, and a cable to connect the current shunt to the
ac source. Option 020 adds the following capabilities to the above listed ac source
models:
– Voltage and current measurement inputs on the rear panel, with capabilities
similar to the output voltage and current measurements available in standard
Keysight ac sources.
– The ability to use any shunt for the external current measurement, allowing
current measurements over a very wide range of magnitudes.
– Precisely synchronized measurements between the rear panel Power Analyzer
input and the ac source output. This is possible because the Power Analyzer
input has its own dedicated measurement buffer.
– New measurement commands that may be used in evaluating uninterruptible
power supplies (for example measuring transfer time, peak voltage, and phase
locked loop performance).
– Frequency modulation of the ac source output.
As shown in the following figure, the Keysight Dual Power Analyzer also includes a
Keysight supplied current shunt, which must be connected to the output of the
equipment under test to make accurate voltage and current measurements. The
specifications and supplemental characteristics of the Keysight Dual Power
Analyzer are documented toward the end of this document.

190 Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide
 Option 020 E

Figure E-1 Option 020 Typical Connections

Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide 191
E Option 020

Front Panel Menus - Additions

The Power Analyzer input uses the same front panel menu commands that are
used to measure the Main Output of the ac source. The following menu
commands have been added to let you access the Power Analyzer input, control
the output frequency modulation, and calibrate the Power Analyzer input. In most
cases you will need to press the ▲ or ▼ on the Function key pad to access the
menu item. Press ▲ or ▼ on the Entry key to access the parameter.

Function command on
Function key press Description
the front panel display

1 115V 60 Hz Display the Main Output measurement when is selected.

Press Phase Select

to toggle between 2 120V 60 Hz Display the Power Analyzer measurement when  is selected.
1 and 2.
FM OFF Enable or disable output frequency modulation (OFF or ON).
FM:FREQ 50 Specify the modulating frequency of the output.
Use ▲ or ▼ to
navigate between
the Freq function FM:DEV 10 Specify the peak deviation of the output frequency modulation.
commands.

Use ▲ or ▼ to FREQ:SRC VOLT Specify the frequency input source (VOLT or CURR)
navigate between
the Input function
commands

192 Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide
 Option 020 E

Entry key press Function key press Entry command Description

CAL:CURR: EXT Begin external current calibration
Use ▲ or ▼ to navigate
between the Calibration CAL:VOLT: EXT Begin external voltage calibration
function commands
SHUNT Enter a value for the external shunt in ohms

With no signal connected to the Power Analyzer input, the 2 front panel display
NOTE may return a very high frequency value. This is normal, since there is no external
frequency for the measurement circuit to detect.

Rear Panel Connections

Power Analyzer input with

removable connector plug

Figure E-2 Rear panel - overall view

Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide 193
E Option 020

Installation
Turn the unit off before connecting any wires.
The Power Analyzer input to the ac source has both voltage and current sense
inputs. Each sense input has a HI and a LO connection. The center pin of the
connector is not used. The maximum isolation voltage to ground is 300 Vac
(± 425 Vdc).
Use the 1-meter, Keysight supplied cable and connect the Power Analyzer input
to the external shunt. Note that the cable connectors are keyed so that the cable
will only fit one way. Disconnect the cable from the unit by pulling it straight back.

You should always connect the V SENSE inputs for the Power Analyzer input to
NOTE operate properly, even if you are not making voltage measurements. This is
because frequency measurements are made by sensing the voltage signal, and
many of the power analyzer measurements depend on an accurate frequency
measurement. If a voltage signal is not available, use
SENSe:FREQuency:SOURce (or its front panel equivalent) to select and measure
the frequency from the current signal instead.

194 Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide
 Option 020 E

Cable connections are shown in the following figure.

Figure E-3 Measurement cable connections

The insulator on the cover must not be removed because it provides ESD
CAUTION protection to the AC source. Please contact Keysight Technical Support for
cable length adjustment.
L'isolateur sur le couvercle ne doit pas être retiré car il fournit une protection
ESD pour la AC source. Veuillez contacter l'assistance technique de Keysight
pour le réglage de longueur du câble.

SAFETY HAZARD. The connector screw terminals will be at line potential

WARNING during operation.

RISQUE DE SÉCURITÉ. Les bornes à vis du connecteur seront au potentiel de

ligne pendant le fonctionnement.

Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide 195
E Option 020

External shunt line and load connections

The Keysight supplied current shunt has both input (line) and output (load)
connectors. The customer must supply the cables to connect the ac lines to and
from the external current shunt. Keysight supplies one hooded cable cover for the
input of the ac source and two hooded cable covers for the shunt. All three of
these covers are assembled and installed in the same way. It is the customer's
responsibility to use these covers when making line cable connections. Note that
a different cable cover is provided for the ac output of the ac source.
The following figure shows the Load and Line connectors on the external current
shunt. Note the location of the line, neutral and ground connectors and connect
your cables accordingly. Note that the connections on the output of the ac source
are not in the same order on the barrier block as on the shunt barrier block.

SAFETY HAZARD. You must secure the power safety cover that was removed
WARNING after completing all connections. This is because the connector screw
terminals will be at line potential during operation.

RISQUE DE SÉCURITÉ. Vous devez fixer fermement le couvercle de sécurité

d'alimentation qui a été retiré après avoir réalisé toutes les connexions. Les
bornes à vis du connecteur seront en effet au potentiel de ligne pendant le
fonctionnement.

196 Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide
 Option 020 E

Figure E-4 Line connections

Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide 197
E Option 020

Figure E-5 Shunt box connection orientation

For the best safety practice, ensure that the shunt box is placed with its label
WARNING always facing up. See Figure E-5 for the correct shunt box connection
orientation set up.

Pour les meilleures pratiques de sécurité, veillez à ce que la boîte de

dérivation soit placée avec son étiquette vers le haut. Consultez la
Figure E-5 pour la configuration adéquate de l'orientation de connexion de la
boîte de dérivation.

198 Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide
 Option 020 E

Check the external current shunt setting

After you have completed your cable connections, you can turn on and check out
the ac source as described in the Chapter 3, "Turn-On Checkout". One additional
step in checking out a unit with Option 020 installed, is to make sure that the
correct shunt value has been entered in the unit. To check the shunt value setting,
proceed as follows:

Action Display
1 Turn on the ac source and wait for the unit to
finish its internal self-test.
2 Press [Shift] [Calibration] and scroll to the SHUNT 0.01
SHUNT command.
3 Check to see if the resistance value on the
display matches the value written on the
outside of the external current shunt.
If it matches, press [Meter] to return to meter
mode. You are done.
If it does not match, you must enter the correct
value. Proceed as follows:
4 Press [Shift] [Calibration], scroll to CAL ON and CAL ON 0.0
press [Enter]. If necessary, enter the calibration
password from Entry keypad and press [Enter].
If the password is correct the Cal annunciator
will come on.
5 Press [Shift] [Calibration], and scroll to the SHUNT 0.01
SHUNT command. Enter the shunt value written
on the outside of the external current shunt
exactly as it is written on the label. Then press
[Enter].
6 Press [Shift] [Calibration], scroll to CAL SAVE, CAL:SAVE
and press [Enter].

Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide 199
E Option 020

Action Display
7 Press [Shift] [Calibration], select CAL OFF, and CAL OFF
press [Enter] to exit calibration.

The shunt value that you enter applies only to the Power Analyzer input and has
NOTE no effect on ac source output measurements. Therefore, ignore the 1 and 2
annunciators while entering the shunt value.

200 Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide
 Option 020 E

Front Panel Programming

Setting the output frequency modulation

The following steps describe how to set the output frequency modulation.

Action Display
1 Press [Freq] on the Function keypad. Then FM:FREQ 1
scroll to the FM:FREQ command to enter a
modulating frequency. Use the numeric keypad
to enter a modulating value and press [Enter].
2 Press [Freq] to set the peak frequency deviation FM:DEV 10
of the output frequency modulation. Then scroll
to the FM:DEV command to enter a frequency
deviation. Use the numeric keypad to enter a
value and press [Enter].
The deviation frequency must be less than the
programmed output frequency by at least
0.001 Hz. Otherwise, it will result in Error 613.
3 Enable frequency modulation by pressing FM ON
[Freq], scroll to FM OFF, select the ON
parameter and press [Enter].

Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide 201
E Option 020

Using the front panel display with the Power Analyzer input
The following describes how to select the measurement source.

Action Display
Press [Meter] to return the display to Meter mode. 2 115V 60 Hz
Press [Phase Select] at any time to toggle between
the Main Output and the Power Analyzer input. The
left-most digit of the front panel display will
indicate either 1 for the Main Output, or 2 for the
Power Analyzer input. If the 2 front panel display
returns a very high frequency value, it usually
means that there is no signal connected to the
Power Analyzer input.
Note that the [Phase Select] key also selects the
measurement source to which the current range
setting applies. The current range command is
located in the input menu.

Making Power Analyzer input measurements

All measurements are based on acquiring and subsequently processing waveform
information. Waveform information is acquired either from the ac source output or
from the Power Analyzer input. When the ac source is on, it continually takes
measurements and updates the front panel meter from whichever measurement
source is active. The [Meter] key accesses the measurement functions from the
front panel. This menu applies to both the ac source output and the Power
Analyzer input.

The Shift Harmonic functions also apply to the Power Analyzer input.
NOTE
If the display indicates OVLD, the measurement capability of the unit has been
exceeded.

Use the Meter menu for making Power Analyzer input measurements.

202 Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide
 Option 020 E

Action Display
1 Press [Phase Select] to toggle to the Power 2 115V 3.04A
Analyzer input. A 2 will appear on the display
when the Power Analyzer input is selected.
2 Press [Meter] and ▼ repeatedly to access the
following measurement functions:
– rms voltage and frequency (the default) 2 <reading>V <reading>Hz

– rms voltage and rms current 2 <reading>V <reading>A

– rms current and frequency (the default) 2 <reading>A <reading>Hz

– rms voltage and power 2 <reading>V <reading>W

– current crest factor 2 <reading> CREST F

– peak current, repetitive 2 <reading>A PK REP

– peak current, non-repetitive 2 <reading>A PK NR

– apparent power 2 <reading> VA

– reactive power 2 <reading> VAR

– power factor 2 <reading> PFACTOR

The ac source uses the output frequency value when calculating many of the
output measurements. For ac source output measurements, the ac source uses
the programmed output frequency value. For the Power Analyzer input, the ac
source uses the frequency measured at the V SENSE input channel. This is the
default setting. You can also select the I SENSE input channel as the frequency
measurement source.

Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide 203
E Option 020

The following describes how to use the input menu for selecting the frequency
source.

Action Display
If a voltage signal is not available to measure the 2 115V 60 Hz
output frequency, you must select the current
measurement as the frequency source. Press
[Input], scroll to FREQ:SRC VOLT, select the CURR
parameter and press [Enter].

204 Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide
 Option 020 E

Power Analyzer Input Specifications

Table E-1 lists the specifications of the Keysight Dual Power Analyzer Option 020.
Performance specifications are warranted over the ambient temperature range of
0 to 40 °C. Unless otherwise noted, specifications are for a sine wave with a
resistive load at a frequency range of 45 Hz to 1 kHz, with the Keysight supplied
current shunt, after a 30-minute warm-up.

Table E-1 Performance specifications

Parameter Keysight 6813C Option 020
Measurement accuracy (at 25 °C ±5 °C), ±(% of output + offset)
RMS voltage
(45 to 100 Hz) 0.03% + 100 mV
(>100 to 500 Hz) 0.1% + 100 mV
(>500 Hz to 1 kHz): 0.2% + 100 mV
DC voltage 0.03% + 150 mV
RMS current high range
(45 to 100 Hz) 0.05% + 10 mA
(>100 to 500 Hz) 0.05% + 15 mA
(>500 Hz to 1 kHz) 0.05% + 30 mA
RMS current low range
(45 to 100 Hz) 0.05% + 1.5 mA
(>100 to 500 Hz) 0.05% + 8 mA
(>500 Hz to 1 kHz) 0.05% + 25 mA
Repetitive pk current high range (45 Hz 1 kHz) 0.05% + 150 mA
Repetitive pk current low range (45 Hz 1 kHz) 0.03% + 150 mA
Power (VA) low range
(45 to 100 Hz) 0.1% + 1.5 VA + 1.2 mVA/V
(>100 to 500 Hz) 0.1% + 2 VA + 1.2 mVA/V
(>500 Hz to 1 kHz) 0.1% + 6 VA + 1.2 mVA/V

Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide 205
E Option 020

Table E-1 Performance specifications

Parameter Keysight 6813C Option 020
Power (VA) high range
(45 to 100 Hz) 0.1% + 1.5 VA + 12 mVA/V
(>100 to 500 Hz) 0.1% + 2 VA + 12 mVA/V
(>500 Hz to 1 kHz) 0.1% + 6 VA + 12 mVA/V
Power (Watts) low range
(45 to 100 Hz) 0.1% + 0.3 W + 1.2 mW/V
(>100 to 500 Hz) 0.1% + 1.2 W + 1.2 mW/V
(>500 Hz to 1 kHz) 0.1% + 2.5 W + 1.2 mW/V
Power (Watts) high range
(45 to 100 Hz) 0.1% + 0.3 W + 12 mW/V
(>100 to 500 Hz) 0.1% + 1.2 W + 12 mW/V
(>500 Hz to 1 kHz) 0.1% + 2.5 W + 12 mW/V
Power Factor 0.01
Harmonic measurement accuracy (50/60 Hz, at 25 °C ±5 °C), (% of output + offset)
Voltage magnitude 0.03% + 100 mV + 0.2%/kHz
Current magnitude (low range) fundamental 0.03% + 1.5 mA
Harmonics 2 to 49 0.03% + 1 mA + 0.2%/kHz
Current magnitude (high range) fundamental 0.05% + 5 mA
Harmonics 2 to 49 0.05% + 3 mA + 0.2%/kHz
Isolation to ground 300 Vrms/425 Vdc

Measurement ranges
AC voltage 0 to 300 Vrms
DC voltage ± 425 V
±80 A peak (high range)
Current ±8 A peak (low range)
13 Arms maximum continuous

206 Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide
 Option 020 E

Table E-1 Performance specifications

Parameter Keysight 6813C Option 020
Average measurement resolution
RMS voltage 10 mV
RMS current 2 mA
THD (for a fundamental amplitude ≥5% of full scale): 5% of reading + 0.1%
Average measurement resolution
Measurement source synchronization < 100 ns
Measurement buffer length 4096 points
Measurement/Generation synchronization ≤ 50 μs
Measurement acquisition sampling rate range 25 to 250 μs
Voltage/Current digitization accuracy 12 bits
Voltage/Current digitization resolution 16 bits
Harmonic measurement time (amplitude)
Meas:Curr:Harm? <n> 400 ms
Meas:Array:Curr:Harm? 10 s

Table E-2 Supplemental characteristics

Parameter Keysight 6811C Option 020 Keysight 6812C Option 020 Keysight 6813C Option 020
Net weight 30 kg (66.1 lbs) 31 kg (68.3 lbs)
Shipping
34.49 kg (76.04 lbs) 35.49 kg (78.24 lbs)
weight

Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide 207
E Option 020

Verification and calibration for Option 020

This section includes verification and calibration procedures for the Keysight Dual
Power Analyzer Option 020. Add these procedures to those described in
Appendix B.
The verification procedures do not check all the operating parameters, but verify
that the ac source is performing properly.
The output of the ac source must be enabled during verification or calibration, as
such, proceed with caution since the voltages and currents will be active at the
output terminals.

Perform the verification procedures before calibrating your ac source. If the ac

NOTE source passes the verification procedures, the unit is operating within its
calibration limits and does not need to be re-calibrated.

LETHAL VOLTAGES. AC sources can supply 425 V peak at their output.

WARNING DEATH on contact may result if the output terminals or circuits connected to
the output are touched when power is applied. These procedures must be
performed by a qualified electronics technician or engineer trained on this
equipment.

TENSIONS MORTELLES. AC source peuvent fournir 425 V maximum à leur

sortie. Tout contact peut entraîner la MORT si les circuits ou bornes de
sorties connectés à la sortie sont touchés lorsqu'ils sont sous tension. Ces
procédures doivent être réalisées par un ingénieur ou technicien en
électronique qualifié formé sur l'équipement.

Equipment Required
The equipment listed in the following table, or the equivalent to this equipment, is
required for verification and calibration.

208 Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide
 Option 020 E

Table E-3 Equipment required for option 020

Equipment Characteristics Recommended Model
5-pin connector plug This connector is supplied with the ac source when ordered with Option 020. 0360-2681
Resolution: 10 nV at 1 V
Digital voltmeter Readout: 8.5 digits Keysight 3458A
Accuracy: >20 ppm

Current monitor[a] 0.01 Ω, ±200 ppm Guildline 7320/0.01

Load resistor 30 Ω, 100 W minimum
Capacitor
1.0 μF, 50 V 0160-3490
(calibration only)
Function generator
50 mV, 500 mV, 60 Hz sine wave capability Keysight 33120A
(calibration only)
HP Series 200/300 or
GPIB controller Full GPIB capabilities
equivalent

[a] The 4-terminal current shunt is used to eliminate output current measurement error caused by voltage drops in the load leads and
connections. Connect the voltmeter directly to these current-monitoring terminals.

Verification Procedure
The following verification procedures assume you understand how to operate the
ac source from the front panel as explained in Chapter 4, " Front Panel Operation".
Perform the following tests for operation verification in the order indicated.
1 Turn-on checkout.
2 Voltage measurement accuracy.
3 Current measurement accuracy.

The ac source must pass turn-on self-test before you can proceed with the
NOTE verification.

Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide 209
E Option 020

Test setup

Figure E-6 Verification/Calibration test setup

210 Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide
 Option 020 E

Power Analyzer voltage measurement accuracy

This test verifies the accuracy of the Power Analyzer voltage measurements. The
Phase 2 annunciator on the left side of the display, must be on for the front panel
to display Power Analyzer input measurements. Part A in Figure E-6 shows the
setup. Measure the ac output voltage directly at the output terminals.

Action Normal result

1 Make sure the ac source is turned off. Connect
the DMM to the output terminals the ac source.
Connect the Power Analyzer voltage sense
terminals (V SENSE) to the Main Output
terminals of the ac source (see Part A in
Figure E-6).
2 Turn on the ac source with no load. In the
Output menu, execute the *RST command to *RST
reset the unit to its factory default state.
3 If the Phase 2 annunciator does not appear on
the right side of the display, press the [Phase 2
0V 60 Hz
Select] key.
4 Program the output voltage to 150 volts and set
CV annunciator on
the output current limit to its maximum value.
5 Enable the output by pressing [Output On/Off]. Output voltage near 150 V
2 front panel reading
6 Record voltage readings at the DMM and on the
within 145 mV of DMM
front panel display.
reading
7 Program the output voltage to 300 volts. Output voltage near 300 V
2 front panel reading
8 Record voltage readings at the DMM and on the
within 190 mV of DMM
front panel display.
reading

Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide 211
E Option 020

Power Analyzer current measurement accuracy

This test verifies the accuracy of the Power Analyzer current measurements. The
Phase 2 annunciator on the left side of the display, must be on for the front panel
to display Power Analyzer input measurements. Part A in Figure E-6 shows the
setup. Use the Keysight supplied current shunt. It has the accuracy specified in
Table E-3. Use wire of sufficient size to carry the maximum rated current of the ac
source.

Check to make sure that the internal shunt value in the ac source matches the
NOTE value written on the external current shunt. Refer to “Check the external current
shunt setting” on page 199.

Action Normal result

1 Turn off the ac source. Connect the 30 Ω load
resistor, current shunt, and the DMM across the
current shunt. Connect the Power Analyzer
current terminals (I SENSE) across the current
shunt (see part A in Figure E-6).
2 Turn on the ac source. In the Output menu,
execute the *RST command to reset the unit to *RST
its factory default state.
3 If the Phase 2 annunciator does not appear on
the right side of the display, press the [Phase 2 0V 60 Hz
Select] key.
4 Program the output voltage to 100 volts and set
CC annunciator on, output
the current limit to 3 amperes. Enable the
current near 3 amperes
output by pressing [Output On/Off].
5 Record the DMM voltage reading and calculate
2 front panel reading
the rms current. Divide the DMM reading by the
within 11.5 mA of
current monitor resistor value. Record the front
measured output current
panel reading.

212 Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide
 Option 020 E

Calibration Procedure
Table E-3 lists the equipment required for calibration. Figure E-6 shows the test
setup. The following procedures assume you understand how to operate front
panel keys (see Chapter 4, " Front Panel Operation").

LETHAL VOLTAGES. AC sources can supply 425 V peak at their output.

WARNING DEATH on contact may result if the output terminals or circuits connected to
the output are touched when power is applied. These procedures must be
performed by a qualified electronics technician or engineer trained on this
equipment.

TENSIONS MORTELLES. AC source peuvent fournir 425 V maximum à leur

sortie. Tout contact peut entraîner la MORT si les circuits ou bornes de
sorties connectés à la sortie sont touchés lorsqu'ils sont sous tension. Ces
procédures doivent être réalisées par un ingénieur ou technicien en
électronique qualifié formé sur l'équipement.

Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide 213
E Option 020

Summary of front panel calibration menu

The Entry keypad is used for calibration functions.

Entry key press Function key press Display Command function

Use ▲ or ▼ to Turn the calibration mode on when the correct password value
CAL ON <value>
navigate between is entered.
the Calibration
CAL OFF Turn the calibration mode off.
Press to access the function
calibration menu. commands CAL:LEV <char> Advance to the next step in sequence (P1, P2, P3, or P4).
CAL:DATA <value> Input a calibration measurement.
SHUNT <value> Enter a value for the external current shunt in ohms.
CAL:VOLT:OFFSET Begin voltage offset calibration.
CAL:VOLT:DC Begin DC voltage calibration sequence.
CAL:VOLT:AC Begin AC voltage calibration sequence.
CAL:VOLT:PROT Begin voltage protection calibration.
CAL:VOLT:EXT Begin external voltage calibration sequence.
CAL:CURR:AC Begin AC current calibration sequence.
CAL:CURR:MEAS Begin current measurement calibration sequence.
CAL:CURR:EXT Begin external current calibration sequence.
CAL:IMP Begin output impedance calibration sequence.
CAL:SAVE Saves the calibration constants in non-volatile memory.
CAL:PASS <value> Set new calibration password.

214 Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide
 Option 020 E

Enable calibration mode

Action Display
1 Reset the unit by pressing [Shift] [Output], and *RST
then press [Enter].
2 Press [Shift] [Calibration], enter the calibration CAL ON 0.0
password from Entry keypad, and press [Enter].
If the password is correct, the Cal annunciator
will come on. (If no password has been set, just
press [Enter].)

Calibrating and entering Power Analyzer voltage calibration values

Action Display
3 Connect a Keysight 3458A DMM (in *RST
synchronous AC volts mode) to the ac source
output terminals. Short the Power Analyzer
voltage terminals (V SENSE) to ensure no DC
offset error.
4 Press [Shift] [Calibration], scroll to CAL:VOLT:EXT
CAL VOLT EXT, and press [Enter].
5 Leave the ac source on and remove the short
from the Power Analyzer voltage terminals.
6 Connect the Power Analyzer voltage sense
terminals to the Main Output terminals of the ac
source (see part A in Figure E-6).
7 Press [Shift] [Calibration], scroll to CAL LEV P1 CAL:LEV P1
and press [Enter]. The ac source will output
300 Vac 60 Hz sine wave.
8 Press [Shift] [Calibration], scroll to CAL DATA, CAL:DATA 0.00
and use the Entry keypad to enter the voltage
value displayed on the Keysight 3458A DMM.

Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide 215
E Option 020

Action Display
9 Press [Shift] [Calibration], scroll to CAL SAVE CAL SAVE
and press [Enter].

Calibrating and entering Power Analyzer current calibration values

Action Display
10 Short the Power Analyzer current sense
terminals (I SENSE) to ensure no DC offset
error.
11 Press [Shift] [Calibration], scroll to CAL:CURR:EXT
CAL CURR EXT and press [Enter].
12 Leave the ac source on and remove the short
from the Power Analyzer current terminals.
13 Connect the Power Analyzer current terminals
to the output of the function generator (see part
B in Figure E-6). Set the function generator
output to 50 mV, 60 Hz.
14 Connect the Power Analyzer current terminals
to the Keysight 3458A input terminals.
Note that the Keysight 3458A must be in
synchronous ac volts mode and a 1.0 μF
capacitor must be installed across the Keysight
3458A input terminals.
15 Press [Shift] [Calibration], scroll to CAL LEV P1, CAL LEV P1
and press [Enter].
16 Press [Shift] [Calibration] and scroll to CAL:DATA 0.00
CAL DATA. Use the Entry keypad to enter the
voltage value displayed on the Keysight 3458A
DMM.
17 Change the function generator output setting to
500 mV.

216 Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide
 Option 020 E

Action Display
18 Press [Shift] [Calibration], scroll to CAL LEV P1 CAL:LEV P2
command, on the Entry keypad, use ▼ to scroll
to the P2 parameter, and press [Enter].
19 Press [Shift] [Calibration] and scroll to the CAL:DATA 0.00
CAL DATA. Use the Entry keypad to enter the
voltage value displayed on the Keysight 3458A
DMM.
20 Press [Shift] [Calibration], scroll to CAL SAVE CAL SAVE
and press [Enter].

Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide 217
E Option 020

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218 Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide
 Keysight Models 6811C, 6812C, and 6813C AC Power Solutions
User’s and Service Guide

F Option 026
Auxiliary Output Capability 220
Front Panel Menus - Additions 221
Rear Panel Connections 222
Installation 222
Front Panel Programming 223
Auxiliary Output Specifications 224
Calibration Procedure 225

219
F Option 026

Auxiliary Output Capability

The Keysight Technologies Auxiliary Output Option 026 is available on the
following ac sources:
– Keysight 6812C AC Power Source (750VA)
– Keysight 6813C AC Power Source (1750VA)
Option 026 consists of an auxiliary 26 Vrms output located on the rear panel of the
ac source. This is a programmable output with a maximum output current of
100 mArms. The output frequency tracks the frequency of the main output of the
ac source. Option 026 adds the following capabilities to the above listed ac source
models:
– AC voltage and phase are programmable, in immediate mode only.
– Software calibration is available for both voltage and phase. Calibration is
performed at a single frequency (400 Hz). Note that there is no compensation
for frequency-dependent voltage variation or phase shift.
– The auxiliary output waveform and frequency are always the same as the main
output.
– For a sine wave output, the maximum programmed rms voltage value is
26.02 V. For any waveform, the programmed rms voltage value may not result
in a peak voltage of more than 36.8 V.
– Current limit is not programmable.
– DC voltage is not available.

220 Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide
 Option 026 F

Front Panel Menus - Additions

The following menu commands have been added to let you program the auxiliary
output. In most cases you will need to press the ▲ or ▼ on the Function key pad
to access the menu item. Press ▲ or ▼ on the Entry key to access the parameter.

Function key press Description

VOLT:AUX <value> Set auxiliary output voltage.

Use ▲ or ▼ to navigate between
the Voltage function commands

PHASE:AUX <value> Set auxiliary output phase.

Use ▲ or ▼ to navigate between
the Freq function commands.

Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide 221
F Option 026

Rear Panel Connections

Auxiliary output with

removable connector

Figure F-1 Rear panel - overall view

Installation
Turn the unit off before connecting any wires.
The auxiliary output has a HI and a LO connection. Two pins are designated HI and
the other two pins are designated LO. The maximum isolation voltage to ground is
300 Vac (± 425 Vdc).

You should always use both pins of the HI and the LO outputs. This promotes
NOTE current sharing among the output pins.

222 Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide
 Option 026 F

Front Panel Programming

Setting the auxiliary output

The following steps describe how to set the auxiliary output voltage and phase.

Action Display
1 Set the auxiliary output voltage by pressing VOLT:AUX 10
[Voltage]. Then scroll to the VOLT:AUX
command. Use the numeric keypad to enter a
voltage and press [Enter].
2 Set the auxiliary output phase by pressing PHASE:AUX 25
[Shift] [Phase]. Then scroll to the PHASE:AUX
command. Use the numeric keypad to enter a
phase and press [Enter].
The deviation frequency must be less than the
programmed output frequency by at least
0.001 Hz. Otherwise, it will result in Error 613.
3 Enable the auxiliary output by pressing
[Output On/Off].

Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide 223
F Option 026

Auxiliary Output Specifications

Table A-1 lists the specifications of the Keysight Auxiliary Output Option 026.
Performance specifications are warranted over the ambient temperature range of
0 to 40 °C Unless otherwise noted, specifications are for a sine wave with a
resistive load at a frequency range of 400 Hz.

Table F-1 Performance specifications

Parameter Option 026
Maximum output ratings
RMS voltage 0 to 26 V
RMS current 100 mA

Frequency[a] 400 Hz

[a] The frequency of the auxiliary output tracks the main output.

Table F-2 Supplemental characteristics

Parameter Option 026
Short circuit current (sustainable indefinitely) >100 mArms

Phase
Offset relative to main output ≤1 degree
Phase control range ±360 degree
Programming resolution
Output voltage 10 mV
Output phase 0.1 degree
Net weight 30 kg (66.1 lbs)
Shipping weight 34.49 kg (76.04 lbs)

224 Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide
 Option 026 F

Calibration Procedure
This section includes calibration procedures for the Auxiliary Output Option 026.
Add these procedures to those described in Appendix B.
The output of the ac source must be enabled during calibration, as such, proceed
with caution since voltages and currents will be active at both the auxiliary and
the main output terminals.

Perform the verification procedures before calibrating your ac source. If the ac

NOTE source passes the verification procedures, the unit is operating within its
calibration limits and does not need to be re-calibrated.

LETHAL VOLTAGES. AC sources can supply 425 V peak at their output.

WARNING DEATH on contact may result if the output terminals or circuits connected to
the output are touched when power is applied. These procedures must be
performed by a qualified electronics technician or engineer trained on this
equipment.

TENSIONS MORTELLES. AC source peuvent fournir 425 V maximum à leur

sortie. Tout contact peut entraîner la MORT si les circuits ou bornes de
sorties connectés à la sortie sont touchés lorsqu'ils sont sous tension. Ces
procédures doivent être réalisées par un ingénieur ou technicien en
électronique qualifié formé sur l'équipement.

Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide 225
F Option 026

Equipment Required
The equipment listed in the following table, or the equivalent to this equipment, is
required for verification and calibration.

Table F-3 Equipment required

Equipment Characteristics Recommended Model
This connector is supplied with the ac source when ordered with Option
4-pin connector plug 1252-1488
026.
Resolution: 10 nV at 1 V
Digital voltmeter Readout: 8.5 digits Keysight 3458A
Accuracy: better than 20 ppm
Keysight 53132A or
Universal Counter
equivalent
10:1 probes (2)
HP Series 200/300 or
GPIB Controller Full GPIB capabilities
equivalent

226 Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide
 Option 026 F

Summary of Front Panel Calibration Menu

The Entry keypad is used for calibration functions.

Entry key press Function key press Display Command function

Use ▲ or ▼ to Turn the calibration mode on when the correct password value
CAL ON <value>
navigate between is entered.
the Calibration
CAL OFF Turn the calibration mode off.
Press to access the function
calibration menu. commands CAL:LEV <char> Advance to the next step in sequence (P1, P2, P3, or P4).
CAL:DATA <value> Input a calibration measurement.
SHUNT <value> Enter a value for the external current shunt in ohms.
CAL:VOLT:OFFSET Begin voltage offset calibration.
CAL:VOLT:DC Begin DC voltage calibration sequence.
CAL:VOLT:AC Begin AC voltage calibration sequence.
CAL:VOLT:AUX Begin auxiliary voltage calibration
CAL:VOLT:PROT Begin voltage protection calibration.
CAL:VOLT:EXT Begin external voltage calibration sequence.
CAL:CURR:AC Begin AC current calibration sequence.
CAL:CURR:MEAS Begin current measurement calibration sequence.
CAL:CURR:EXT Begin external current calibration sequence.
CAL:IMP Begin output impedance calibration sequence.
CAL:PHAS:AUX Begin auxiliary phase calibration
CAL:SAVE Saves the calibration constants in non-volatile memory.
CAL:PASS <value> Set new calibration password.

Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide 227
F Option 026

Enable calibration mode

Action Display
1 Reset the unit by pressing [Shift] [Output], and *RST
then press [Enter].
2 Press [Shift] [Calibration], enter the calibration CAL ON 0.0
password from Entry keypad, and press [Enter].
If the password is correct, the Cal annunciator
will come on. (If no password has been set, just
press [Enter].)

Calibrating the auxiliary output voltage

Action Display
3 Disconnect all loads from the ac source.
Connect the DMM across the output terminals
of the auxiliary output using the 4-pin
connector provided. Make sure the DMM is
operating in AC voltage mode.
4 Press [Shift] [Calibration], scroll to CAL:VOLT:AUX
CAL VOLT AUX, and press [Enter].
5 Press [Shift] [Calibration], scroll to CAL LEV P1, CAL:LEV P1
and press [Enter].
6 Press [Shift] [Calibration], scroll to CAL DATA, CAL:DATA 0.00
and use the Entry keypad to enter the AC
voltage value displayed on the DMM. Then
press [Enter].
7 Press [Shift] [Calibration], scroll to CAL SAVE, CAL:SAVE
and press [Enter].
8 Press [Shift] [Calibration], select CAL OFF, and CAL OFF
press [Enter] to exit calibration mode. *RST and
*RCL will also set the calibration state to OFF.

228 Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide
 Option 026 F

Calibrating the auxiliary output phase

Action Display
1 Disconnect all loads from the ac source. Reset *RST
the ac source by selecting [Shift] [Output],
scrolling to *RST, and pressing [Enter]. Make
sure that the Dis annunciator on the front panel
is on.
2 Use a clip lead and connect the LO terminal of
the auxiliary output to the ACC terminal of the
main output.
3 Program the main output of the ac source to
26 Vrms at 400 Hz. Program the auxiliary output
of the ac source to 26 Vrms. Press [Output On/
Off] to enable the outputs.
4 Set the 53132A controls as follows:
– Other measurement: Phase 1 to 2
– Channel 1 and 2 impedance: 1 MΩ
– Channel 1 and 2 coupling: AC
– Channel 1 and 2 attenuator: 10 times
5 Connect input 2 of the 53132A to the auxiliary
output with a 10:1 probe, positive lead to Hi out
and negative lead to Low out (common to main
output low).

Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide 229
F Option 026

Action Display
6 Connect input 1 of the 53132A to the main
output with a 10:1 probe, positive lead to AC out
and negative lead to ACC out (common to
auxiliary output low).
Note: The 10:1 probes must be properly
compensated for the 1 MΩ inputs to ensure that
the probes do not contribute a phase offset
error. Compensation may be easily done by
connecting both probes to the same ac source
output and adjusting the compensation for one
probe to produce a reading of 0.0 degrees on
the 53132A counter.
7 Enable calibration mode as previously
described.
8 Press [Shift] [Calibration], scroll to CAL:PHAS:AUX
CAL PHAS AUX, and press [Enter].
9 Press [Shift] [Calibration], scroll to CAL LEV P1 CAL:LEV P1
and press [Enter].
10 Using the universal counter (or equivalent
instrument), monitor the phase of the auxiliary
output with respect to the main output.
11 Press [Shift] [Calibration], scroll to CAL DATA, CAL:DATA 0.00
use the Entry arrow keys (▲ or ▼) to adjust the
calibration parameter until the measured phase
difference is zero or as close to zero as possible.
The actual phase at the instrument output
changes immediately in response to the arrow
keys. This is the only time that the arrow keys
operate in this live mode.
12 When the measured phase difference has been
adjusted to zero, press [Enter].
13 Press [Shift] [Calibration], scroll to CAL SAVE, CAL:SAVE
and press [Enter].

230 Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide
 Option 026 F

Action Display
14 Press [Shift] [Calibration], select CAL OFF, and CAL OFF
press [Enter] to exit calibration mode. *RST and
*RCL will also set the calibration state to OFF.

Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide 231
F Option 026

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232 Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide
 Keysight Models 6811C, 6812C, and 6813C AC Power Solutions
User’s and Service Guide

G Line Voltage Conversion

Line Voltage Conversion 234

233
G Line Voltage Conversion

Line Voltage Conversion

LETHAL VOLTAGES. AC Sources can supply 424 V peak at their output. DEATH
WARNING
on contact may result if the output terminals or circuits connected to the
output are touched when power is applied. Hazardous voltages can remain
active inside the unit even after it has been turned off. These procedures
must be performed by a qualified electronics technician or engineer trained
on this equipment.

TENSIONS MORTELLES. Source AC peuvent fournir 424 V maximum à leur

sortie. Tout contact peut entraîner la MORT si les circuits ou bornes de
sorties connectés à la sortie sont touchés lorsqu'ils sont sous tension. Des
tensions dangereuses peuvent rester actives à l'intérieur de l'unité, même
après l'avoir mise hors tension. Ces procédures doivent être réalisées par un
ingénieur ou technicien en électronique qualifié formé sur l'équipement.

The line conversion process is for use by trained personnel only. To avoid
WARNING dangerous electrical shock, do not perform any line conversion unless you
are qualified to do so.

Le processus de conversion de ligne ne doit être effectué que par du

personnel formé. Afin d'éviter tout choc électrique dangereux, n'effectuez
pas de conversion de ligne si vous ne disposez pas de la qualification
requise.

Open the unit

1 Turn off the ac power to the unit and disconnect the power cord from the
power outlet.
2 Remove the four screws that secure the two carrying straps and outer cover
(use a T25 Torx drive).
3 Slightly spread the bottom of the cover and pull it back to remove it from the
front panel.

234 Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide
 Line Voltage Conversion G

4 Observe the two LEDs that are visible in the cutouts on each side of the unit. If
either LED is on, there is hazardous voltage inside the unit. Wait until the LED
goes out before proceeding (this may take several minutes).

Check the jumper wire (Model 6811C/6812C only)

1 Locate the line voltage jumper wire in the cutout at the side of the unit by the
line cord (see Figure G-1).
2 For 100 V or 120 V operation, install the jumper on the lug labeled:100/120.
For 200 V, 208 V, or 230 V operation, install the jumper on the lug labeled:
200/220.

Check the two rocker switches (all Models)

1 Locate the rocker switches in the cutout at the side of the unit by the on/off
switch.
2 Configure the rocker switches according to the line voltage shown in the
accompanying label. When configuring a unit for 208 V, use the settings
shown for 200 V.

Check the power transformer connector (all Models)

This procedure is only required if you are changing the input voltage between
NOTE 100 V and 120 V or between 200/208 V and 230 V.

1 Remove the screws securing the inner cover (use a T15 Torx drive).
2 Remove the inner cover.
3 Remove the screws securing the PC board behind the front panel (use a T15
Torx drive).
4 You need only to lift the board out of the way, you do not need to disconnect
any cables.
5 Locate the connector in front of the power transformer.
6 For 100 V, 200 V, or 208 V operation, install the plug on the connector labeled:
200 V input.

Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide 235
G Line Voltage Conversion

For 120 V or 230 V operation, install the plug on the connector labeled:
240 V input.
7 Replace the PC board and inner cover.

Be sure to replace all of the screws removed in step 1 and step 3.

NOTE

Close the unit

1 Replace the outer cover.
2 Change the label on the rear panel to reflect the changed input voltage rating.
3 Reconnect the power and turn on the unit.

Ensure that all assembly parts are in proper condition after performing the
WARNING line voltage conversion procedure.

Veillez à ce que toutes les pièces de l'ensemble soient en bon état après
avoir effectué la procédure de conversion de tension de ligne.

– Line voltage conversion does not require any fuse changes.

NOTE
– Calibration is recommended after the line voltage conversion process to
ensure that the guaranteed specifications are met and that the instrument
functions as intended.

236 Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide
 Line Voltage Conversion G

Figure G-1 Line voltage conversion components

Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide 237
G Line Voltage Conversion

THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK.

238 Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide
A digital connector, 42 inspection, 42
dimensions, 45
accessories, 26 L
airflow, 44 E
annunciators, 76 LAN control keys, 83
Addr, 76 entry keys, 99 LAN menu, 83
Cal, 76 0 to 9, 99 LAN reset, 84
CC, 76 backspace, 99 lethal voltages, 154
CV, 76 calibration, 100 list, 110, 114
Dis, 76 clear entry, 100 list control keys, 95
Err, 76 decimal, 99 list, 97
f 1, 76 enter, 100 load regulation, 37
Meter AC+DC, 76 exponential, 100 load voltage drops, 51
OCP, 76 minus, 100 location, 44
Output AC+DC, 76 up/down, 99
Prot, 76 error messages, 69 M
Rmt, 76 error numbers, 178
Shift, 76 manuals, 26
SRQ, 76 F measure
ac, 105
Tran, 76
Unr, 76 FLT connections, 55 ac+dc, 104
AWG ratings, 51 function keys, 81 dc, 105
output, 81 meter display keys, 85
phase select, 82 harmonic, 86
C trigger control, 82 input, 85, 192, 193, 214,
cables, 26 up index/down index, 82 227
calibration, 164 up/down, 82 meter, 85
ac rms voltage gain, 169
dc voltage gain, 168 G N
enable, 166
equipment, 156 general information, 26 non-volatile memory
error messages, 175 GPIB, 125 clearing, 126
GPIB, 176 address, 125 storing, 80
menu, 165 connections, 57
output impedance, 173 ground earth, 6 O
OVP trip point, 171 guide, programming, 26
guide, users, 26 OCP condition, 108
password, 174
OT condition, 109
rms current, 171, 172
saving, 173 H output
ac+dc, 104
setup, 156
hazardous voltages, 154 characteristic, 32
voltage offset, 167
clearing output
capabilities, 30
cleaning, 43 I protection, 107
connections, 49
INH connections, 55 connector, 42
D input setting DC offset, 104
connections, 46 setting output
damage, 42
power, 26 protection, 106
digital connections, 55
inrush current capability, 35 setting the amplitude, 102

Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide 239
 setting the frequency, 103 rack mounting, 44
output control keys, 87 rail condition, 109
current, 89 real time voltage regulation, 37
frequency, 90, 192, 221 recalling operating states, 126
output, 92 RI condition, 109
phase, 91 RMS voltage regulation, 37
pulse, 92 RS-232
shape, 91 connector, 58
voltage, 87 data format, 57
output coupling interface, 57
ac, 40, 104 parameters, 125
dc, 40, 104
output impedance S
less than 1 ohm, 38
reactive, 38 safety class, 5
real, 38 safety summary, 5
OV condition, 108 safety warning, 6
OVLD, 71 saving operating states, 126
self-test, 63
P self-test errors, 70
sense connections, 52
parts shift annunciator, 64
operator replaceable, 26 SOA condition, 109
peak current status control keys, 94
capability, 33 status, 95
limit, 33 system keys, 78
peak inrush capacitance, 34 address, 79
peak inrush current error, 80
measuring, 122 information, 79
phase synchronization, 117 local, 78
power cord, 42 recall, 79
installation, 46 save, 80
power receptacle, 5 shift, 78
preliminary checkout, 63
protection T
OCP, 107
OT, 107 trigger keys, 95
OV, 107 trigger control, 96
Rail, 107
RI, 107
SOA, 107
protection keys, 94
protect, 94
pulse, 112

R
rack mount kit, 26

240 Keysight Models 6811C, 6812C, and 6813C User’s and Service Guide
This information is subject to change
without notice. Always refer to the
Keysight website for the latest
revision.

© Keysight Technologies 2017-2020

Edition 3, September 2020

Printed in Malaysia

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06811-90002
www.keysight.com