KERN & Sohn GmbH

Ziegelei 1 Tel: +49-[0]7433- 9933-0

D-72336 Balingen Fax: +49-[0]7433-9933-149
E-Mail: info@kern-sohn.com Internet: www.kern-sohn.com

Operating Instructions
Precision balance

KERN EMB
Version 3.6
10/2016
GB

EMB-BA-e-1636
 KERN EMB
GB Version 3.6 10/2016
Operating Instructions
Precision balance

Table of contents:
1 Technical data ................................................................................................ 3
2 Fundamental information (general) .............................................................. 6
2.1 Intended use .............................................................................................................. 6
2.2 Inappropriate use ....................................................................................................... 6
2.3 Guarantee.................................................................................................................. 6
2.4 Monitoring the test substances .................................................................................. 6
3 Fundamental safety information................................................................... 7
3.1 Observe the information in the operating instructions ................................................ 7
3.2 Staff training .............................................................................................................. 7
4 Transport and storage ................................................................................... 7
4.1 Acceptance check...................................................................................................... 7
4.2 Packaging / return transport ...................................................................................... 7
5 Unpacking, installation and commissioning ............................................... 8
5.1 Place of installation, place of use ............................................................................... 8
5.2 Unpacking.................................................................................................................. 9
5.2.1 Installation................................................................................................................................... 9
5.2.2 List of items supplied .................................................................................................................. 9
5.3 Battery Operation....................................................................................................... 9
5.4 Mains supply .............................................................................................................. 9
5.5 Initial start-up ............................................................................................................. 9
5.6 Adjustment................................................................................................................10
5.7 Underfloor weighing ..................................................................................................11
6 Operation ...................................................................................................... 12
6.1 Overview of the keypad ............................................................................................12
6.2 Operating instructions ...............................................................................................12
6.2.1 Weighing................................................................................................................................... 12
6.2.2 Taring........................................................................................................................................ 12
6.2.3 Units.......................................................................................................................................... 13
6.2.4 Dosage und Zero-tracking ........................................................................................................ 13
6.2.5 AUTO-OFF function.................................................................................................................. 14
6.2.6 Reset function ........................................................................................................................... 15
7 Maintenance, upkeep, disposal .................................................................. 16
7.1 Cleaning ...................................................................................................................16
7.2 Maintenance, upkeep ...............................................................................................16
7.3 Disposal ....................................................................................................................16
8 Troubleshooting........................................................................................... 17
9 Declaration of Conformity ........................................................................... 18

2 EMB-BA-e-1636
1 Technical data

KERN EMB EMB EMB EMB EMB

100-3 200-3 200-2 500-1BE 500-1
Readout (d) 0,001 g 0,001 g 0,01 g 0,1 g 0,1 g

Weighing range (Max) 100 g 200 g 200 g 500 g 500 g

Reproducibility 0,001 g 0,001 g 0,01g 0,1 g 0,1 g

Linearity ± 0,005 g ± 0,005g ± 0,02 g ± 0,2 g ± 0,2 g

Adjusting weight (not in- 100 g 200 g 200 g 500g 500g
cluded) (class) (F1) (F1) (M1) (M2) (M2)
Stabilization time 2-3 sec.
AUTO-OFF-Function
3 min.
(in battery mode)
Units g, oz, ozt, dwt

Operating temperature +5°C… +35°C

Air humidity max. 80 % (non-condensing)

170x240
170x240 x39 170x240
Case (W x D x H) mm 170x240x54
x39 Color: x39
Black
Weighing plate mm Ø 82 Ø 82 Ø 105 Ø 150
AA
Battery supply (standard) 9V Block 9V Block
(2x1.5V)
Mains adapter (optional) 300 mA / 9V

Underfloor weighing Hanging loop below the cover plate as standard

EMB-BA-e-1636 3
KERN EMB EMB EMB EMB
600-2 1000-2 1200-1 2000-2
Readout (d) 0,01 g 0,01 g 0,1 g 0,01 g

Weighing range (Max) 600 g 1000 g 1200 g 2000 g

Reproducibility 0,01 g 0,01g 0,1 g 0,01 g

Linearity ± 0,03 g ± 0,05 g ± 0,3 g ± 0,05 g

Adjusting weight (not in- 500 g 1000 g 1000 g 2000 g
cluded) (class) (F2) (F1) (M1) (F1)
Stabilization time 2-3 sec.
AUTO-OFF-Function
3 min.
(in battery mode)
Units g, oz, ozt, dwt

Operating temperature +5°C… +35°C

Air humidity max. 80 % (non-condensing)

Case (W x D x H) mm 170x240x39 170x240x52 170x240x39 170x240x52

Weighing plate mm Ø 105 Ø 150

Battery supply (standard) 9V Block

Mains adapter (optional) 300 mA / 9V

Underfloor weighing Hanging loop below the cover plate as standard

4 EMB-BA-e-1636
KERN EMB EMB EMB EMB EMB
2200-0 3000-1 5.2K1 5.2K5 6000-1
Readout (d) 1g 0,1 g 1g 5g 0,1 g

Weighing range (Max) 2200 g 3000 g 5200 g 5200 g 6000 g

Reproducibility 1g 0,1 g 1g 5g 0,1 g

Linearity ±2g ± 0,3 g ±3g ± 10 g ± 0,3 g

Adjusting weight (not in- 2000 g 3000 g 5000 g 5000 g 5000 g
cluded) (class) (M1) (M1) (M1) (M1) (M1)
Stabilization time 2-3 sec.
AUTO-OFF-Function
3 min.
(in battery mode)
Units g, oz, ozt, dwt

Operating temperature +5°C… +35°C

Air humidity max. 80 % (non-condensing)

Case (W x D x H) mm 170x240x39

Weighing plate mm Ø 150

AA AA
Battery supply (standard) 9V Block 9V Block 9V Block
(2x1.5V) (2x1.5V)
Mains adapter (optional) 300 mA / 9V

Underfloor weighing Hanging loop below the cover plate as standard

EMB-BA-e-1636 5
2 Fundamental information (general)

2.1 Intended use

The balance you have acquired serves to determine the weighing value of the mate-
rial to be weighed. It is intended to be used as a “non-automatic“ balance, i.e. the
material to be weighed is manually and carefully placed in the centre of the weighing
plate. The weighing value can be read off after a stable weighing value has been
obtained.

2.2 Inappropriate use

Do not use the balance for dynamic weighing. In the event that small quantities are
removed or added to the material to be weighed, incorrect weighing results can be
displayed due to the “stability compensation“ in the balance. (Example: Slowly drain-
ing fluids from a container on the balance.)
Do not leave a permanent load on the weighing plate. This can damage the measur-
ing equipment.
Be sure to avoid impact shock and overloading the balance in excess of the pre-
scribed maximum load rating (max.), minus any possible tare weight that is already
present. This could cause damage to the balance.
Never operate the balance in hazardous locations. The series design is not explo-
sion-proof.
Structural alterations may not be made to the balance. This can lead to incorrect
weighing results, faults concerning safety regulations as well as to destruction of the
balance.
The balance may only be used in compliance with the described guidelines. Varying
areas of application/planned use must be approved by KERN in writing.

2.3 Guarantee
The guarantee is not valid following
- non-observation of our guidelines in the operating instructions
- use outside the described applications
- alteration to or opening of the device
- mechanical damage and damage caused by media, liquids
- natural wear and tear
- inappropriate erection or electric installation
- overloading of the measuring equipment

2.4 Monitoring the test substances

The metrology features of the balance and any possible available adjusting weight
must be checked at regular intervals within the scope of quality assurance. For this
purpose, the answerable user must define a suitable interval as well as the nature
and scope of this check. Information is available on KERN’s home page (www.kern-
sohn.com) with regard to the monitoring of balance test substances and the test
weights required for this. Test weights and balances can be adjusted quickly and at
a reasonable price in KERN’s accredited DKD calibration laboratory (return to na-
tional normal).

6 EMB-BA-e-1636
3 Fundamental safety information

3.1 Observe the information in the operating instructions

Please read the operating instructions carefully before erecting and commissioning,
even if you already have experience with KERN balances.

3.2 Staff training

The device may only be operated and looked after by trained members of staff.

4 Transport and storage

4.1 Acceptance check

Please check the packaging immediately upon delivery and the device during un-
packing for any visible signs of external damage.

4.2 Packaging / return transport

 Keep all parts of the original packaging for a possibly required re-
turn.

 Only use original packaging for returning.

 Prior to dispatch disconnect all cables and remove loose/mobile

parts.

 Reattach possibly supplied transport securing devices.

 Secure all parts such as the glass wind screen, the weighing plat-
form, power unit etc. against shifting and damage.

EMB-BA-e-1636 7
5 Unpacking, installation and commissioning

5.1 Place of installation, place of use

The balance is constructed in such a way that reliable weighing results can be
achieved under normal application conditions.
By selecting the correct location for your balance, you will be able to work quickly
and precisely.

Therefore please observe the following at the place of installation:

• Place the balance on a firm, level surface;

• Avoid extreme heat as well as temperature fluctuation caused by installing

next to a radiator or in the direct sunlight;

• Protect the balance against direct draughts due to open windows and doors;

• Avoid jarring during weighing;

• Protect the balance against high humidity, vapours and dust;

• Do not expose the device to extreme dampness for longer periods of time. In-
admissible bedewing (condensation of air moisture on the device) can occur if
a cold device is taken into a significantly warmer environment. In this case,
please acclimatise the device for approx. 2 hours at room temperature after it
has been disconnected from the mains.

• Avoid static charging of the material to be weighed, weighing container and

windshield.

Major display deviations (incorrect weighing results) are possible if electromagnetic

fields occur as well as due to static charging, currents and instable power supply. It is
then necessary to change the location.

8 EMB-BA-e-1636
5.2 Unpacking
Carefully remove the balance from its packaging, remove the plastic wrapping and
position the balance in its intended working location.

5.2.1 Installation
Install the balance in such a fashion that the weighing plate is absolutely horizonta

5.2.2 List of items supplied

Standard accessories:

KERN EMB
• Balance
• Operating manual
• Batteries (2 x 1,5 V) or 1 x 9 V

5.3 Battery Operation

Remove the battery cover from the bottom of the balance. Connect 2 x 1,5V or 1 x 9V
batteries (EMB 200-2/EMB600-2 Block-Battery 9 V). Re-insert the battery cover.
Battery conservation through automatic power-off 3 minutes after ending a weighing
operation.
When the battery power is used up the display will show “LO“. Press the key and
change the batteries at once.
When the balance is not in use for a longer period of time remove batteries and keep
them separately. Leakage of battery liquid might damage the balance.

5.4 Mains supply

Electric power supply is by means of the external mains supply circuit. The printed
voltage level must comply with the local voltage.
Only use original KERN mains supply circuits. The use of other makes is subject to
approval by Kern.

5.5 Initial start-up

A warm-up time of 3 minutes stabilises the measured values after switching on.

The accuracy of the balance depends on the local acceleration of the fall.
Please be sure to observe the information in the chapter on adjusting.

EMB-BA-e-1636 9
5.6 Adjustment
As the acceleration value due to gravity is not the same at every location on earth,
each balance must be coordinated – in compliance with the underlying physical
weighing principle - to the existing acceleration due to gravity at its place of location (
only if the balance has not already been adjusted to the location in the factory). This
adjustment process must be carried out during the initial start-up, after change in
location and variation of surrounding temperature. It is also recommendable to adjust
the balance periodically during weighing operation in order to obtain exact measured
values.
Using a precision weight, the accuracy of the balance can be checked at any time
and adjusted.
Adjustment procedure:

Check that the surrounding conditions are stable.

A short warm-up time of about 3 minutes is recommended for stabilisation.

• Use the key to switch the balance on.

• Press the key and hold depressed for approx. 10 seconds until “CAL“ ap-
pears on the display.
• Release the key; the size of the calibration weight is shown on the display
(see chapter 1, Technical Data).
• Now place the calibration weight in the centre of the weighing plate.
• “F“ will appear for a brief period of time before the balance switches off / then
the automatic return to the weighing mode depending on model).
• Remove the calibration weight. Calibration is completed.

In case of an adjusting error or a wrong adjusting weight “E“ will appear. Repeat the
adjusting procedure.
Keep the adjusting weight near the balance. Daily verification of the balance accu-
racy is recommended for quality assured applications.

10 EMB-BA-e-1636
5.7 Underfloor weighing
Objects which, because of their size or shape, cannot be put on the scale, can be
weighed by means of underfloor weighing.

Proceed as follows:

• Switch off the balance.

• Turn the balance over.
• Open the cover plate (1) on the base of the balance.
• Hang on the hook for underfloor weighing (2).
• Place the balance over an opening.
• Hang the item to be weighed on the hook and carry out weighing.

1 2

Fig. 1: Setting up the balance for underfloor weighings

• For the underfloor weighing use only the original hook of KERN.

• Take care that all hanged items are stable enough to hold the
goods which you wish to weigh (!!Danger of breaking!!).
CAUTION • Never hang goods more than the maximum permitted weight
(!!Danger of breaking!!).

After completing the underfloor weighing, the opening in the floor of the
balance must be closed again (dust protection).

EMB-BA-e-1636 11
6 Operation

6.1 Overview of the keypad

Key Pressed briefly Pressed for 10 sec

Switching the balance on

Unit changing
Tara-Function

Switching the balance off Adjusting function

6.2 Operating instructions

6.2.1 Weighing
 The balance is switched on by pressing the key.

 The balance performs auto-diagnostics (for 2 s) and then displays "0".

 If the weighing object is heavier than the weighing range the display indicates "E"
(=Overload).

 The balance is switched off by pressing the key once.

6.2.2 Taring
 Place tare cup on the weighing plate and press key. The weighing indication
changes now to "0".The weight of the cup is now memorised.

 Fill weighing object in the cup, read measuring value.

 By pressing key, after the terminated weighing operation "0" appears again in
the display.

The taring procedure can be repeated several times, for instance to produce a mix-
ture of several components.

The limit is reached when the total weighing range has been used.

After removal of the tare cup the total weight appears as a negative value with „-„
mark.

12 EMB-BA-e-1636
6.2.3 Units

Different foreign weighing units are integrated into the various balance models .
Change the Units with the key.
Press an hold the key , few seconds later change the unit.

Display Conversion factor

1g=
Gramm g 1.
Unze oz 0.035273962
Troy Unze ozt 0.032150747
Pennyweight dwt 0.643014931

6.2.4 Dosage und Zero-tracking

When the Auto-Zero-function is activated, any slight changes of the zero readout are
automatically tared.
In the event that small quantities are removed or added to the material to be
weighed, incorrect weighing results can be displayed due to the “stability compensa-
tion“ in the balance. (Example: Slowly draining fluids from a container on the bal-
ance.)
Having dosages with slight changes of weight it is recommended to deactivate this
function.
With switched off Zero-Tracking the display however is more unstably.

Activate/deactivate Zero-Tracking
 When the balance is switched off, press the OFF -key and keep it pressed

 Do not release the OFF -key. Press also the ON/TARE-key and keep it pressed

 Keep the ON/TARE-key pressed, however release the OFF -key

 Press OFF -key anew

 Keep both keys pressed until in the display “tr” appears

 Release both keys. The balance is situated in the menu.

 Press the ON/TARE-key until „tr“ appears

 Confirm with the OFF key

EMB-BA-e-1636 13
 Press the ON/TAREkey to switch among the settings:

Display Mode

„tr“ ON Auto-Zero on

„tr“ OFF Auto-Zero off

 Confirm with the OFF key. Wait until the balance automatically returns to weigh-
ing mode

6.2.5 AUTO-OFF function

For battery operation the balance has an automatic switch off function which can be
activated and deactivated in the menu.
Please follow the below instruction for the setting:
 When the balance is switched off, press the OFF -key and keep it pressed

 Do not release the OFF -key. Press also the ON/TARE-key and keep it pressed

 Keep the ON/TARE-key pressed, however release the OFF -key

 Press OFF -key anew

 Keep both keys pressed until in the display “tr” appears

 Release both keys. The balance is situated in the menu.

 Press the ON/TARE-key until „AF“ appears

 Confirm with the OFF key

 Press the ON/TAREkey to switch among the settings:

Display Mode

„AF“ ON Battery conservation through automatic

power-off 3 minutes after ending a
weighing operation.

„AF“ OFF AUTO-OFF function deactivated.

 Confirm with the OFF key. Wait until the balance automatically returns to weigh-
ing mode

14 EMB-BA-e-1636
6.2.6 Reset function
Factory setting reset.

 When the balance is switched off, press the OFF -key and keep it pressed

 Do not release the OFF -key. Press also the ON/TARE-key and keep it pressed

 Keep the ON/TARE-key pressed, however release the OFF -key

 Press OFF -key anew

 Keep both keys pressed until in the display “tr” appears

 Release both keys. The balance is situated in the menu.

 Press the ON/TARE-key until „rSt“ appears

 Confirm with the OFF key

 Press the ON/TAREkey to switch among the settings:

Display Mode

„rst“ YES Factory setting reset

„rst“ NO No factory setting reset

 Confirm with the OFF key. Wait until the balance automatically returns to weigh-
ing mode

EMB-BA-e-1636 15
7 Maintenance, upkeep, disposal

7.1 Cleaning
Please disconnect the device from the operating voltage before cleaning.

Only use a cloth dampened with mild suds and not aggressive cleaning agents (sol-
vents or similar). Please ensure that fluids are not able to get into the device and rub
off using a clean, soft cloth.
Loose sample residue/powder can be removed carefully using a brush or hand vac-
uum cleaner.
Remove any spilt material to be weighed immediately.

7.2 Maintenance, upkeep

The device may only be opened by trained service engineers authorised by KERN.
Disconnect from the mains supply before opening.

7.3 Disposal
The operating company shall dispose of the packaging and the device in compliance
with the valid national or regional law of the operating location.

16 EMB-BA-e-1636
8 Troubleshooting
The balance should be switched off for a short time following an interruption in the
programme sequence and disconnected from the mains supply. It is then necessary
to repeat the weighing process from the beginning.

Help:
Interruption Possible cause

Weight display is not illuminated. • The balance is not switched on.

• The batteries are wrongly inserted, the
batteries are empty
• No batteries are attached
• The mains supply connection has been
interrupted (mains cable not plugged
in/faulty).
• Power supply interrupted. .

The weight display changes continu- • Draught/air movement

ally
• Table/floor vibrations
• The weighing plate is in contact with for-
eign matter.
• Electromagnetic fields / static charging
(choose different location/switch off inter-
fering device if possible)

The weighing result is obviously in- • The balance display is not set to zero
correct
• Adjustment is no longer correct.
• Great fluctuations in temperature.
• Electromagnetic fields / static charging
(choose different location/switch off inter-
fering device if possible)

Switch the balance off if other error messages should appear and then switch on
again. Contact the manufacturer if the error message does not disappear.

EMB-BA-e-1636 17
9 Declaration of Conformity

To view the current EC/EU Declaration of Conformity go to:

www.kern-sohn.com/ce

18 EMB-BA-e-1636