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
Analytical balance

KERN ADB-A / ADB-C / ADJ

Version 3.1
2019-03
GB

ADB_ADJ-BA-e-1931
 KERN ADB_ADJ
GB Version 3.1 2019-03
Operating instructions Analytical balance

Contents
1 Technical data ................................................................................................ 3
2 Declaration of Conformity ............................................................................. 4
3 Device overview ............................................................................................. 5
3.2 Keyboard overview................................................................................................................... 6
3.3 Overview of display .................................................................................................................. 7
4 Basic Information (General) .......................................................................... 8
4.1 Intended use ............................................................................................................................. 8
4.2 Improper Use ............................................................................................................................ 8
4.3 Warranty .................................................................................................................................... 8
4.4 Monitoring of Test Resources ................................................................................................. 9
5 Basic Safety Precautions .............................................................................. 9
5.1 Pay attention to the instructions in the Operation Manual .................................................. 9
5.2 Personnel training .................................................................................................................... 9
6 Transport and storage ................................................................................... 9
6.1 Testing upon acceptance ........................................................................................................ 9
6.2 Packaging / return transport ................................................................................................... 9
7 Unpacking, Setup and Commissioning ..................................................... 11
7.1 Installation Site, Location of Use .......................................................................................... 11
7.2 Unpacking, checking and installation .................................................................................. 12
7.3 Levelling .................................................................................................................................. 12
7.4 Electric power supply ............................................................................................................ 13
7.5 Initial Commissioning ............................................................................................................ 13
7.6 Connection of peripheral devices ......................................................................................... 13
8 Adjustment ................................................................................................... 14
8.2 Models ADB ............................................................................................................................ 17
9 Basic Operation ........................................................................................... 19
9.1 Start-up .................................................................................................................................... 19
9.2 Switch into stand-by mode .................................................................................................... 19
10 Applications ................................................................................................. 22
11 Menu ............................................................................................................. 25
11.1 Navigation in the menu .......................................................................................................... 25
11.2 Menu overview ........................................................................................................................ 27
12 RS232C-interface ......................................................................................... 28
12.1 Technical data ......................................................................................................................... 28
12.2 Interface cable ........................................................................................................................ 29
12.3 Interface parameters .............................................................................................................. 29
12.3.1 Baud rate .............................................................................................................................. 29
12.3.2 Output condition ................................................................................................................... 30
12.4 Sample protocols (KERN YKB-01N) ..................................................................................... 30
13 Servicing, maintenance, disposal .............................................................. 31
14 Instant help................................................................................................... 32
14.1 Error messages ...................................................................................................................... 32

2 ADB_ADJ-BA-e-1931
1 Technical data

KERN ADB 100-4 ADB 200-4 ADB 600-C3

Product no. / type ADB 100-4A ADB 200-4A ADB 600-C3
Default weighing unit g g ct
0,001 ct
Readability (d) 0,0001 g 0,0001 g
0,0001 g
600 ct
Weighing range (max) 120 g 210 g
120 g
0,002 ct
Reproducibility 0,0002 g 0,0002 g
0,0002 g
± 0.004ct
Linearity ± 0.0004 g ± 0.0004 g
± 0,0004 g
Recommended adjusting weight
100 g (E2) 200 g (E2) 100 g (E2)
not supplied (class)
Adjustment points 100 g 100 g 100 g
- 200 g -
Stabilization time 4 sec.
Warm-up time 8h
Weighing Units g, oz, ct, lb
Smallest part weight for piece 1 mg (under laboratory conditions)
counting
10 mg (under normal conditions)
Reference quantities at
10, 20, 50,100, 1000
piece counting
Weighing plate, stainless steel ø 90 mm
Dimensions Housing
230 x 310 x 330 230 x 310 x 230
(B x D x H) mm
Net weight (kg) 4,4 3,8
Permissible ambient condition +10° C to +30° C
Humidity of air 20 ~ 85 % relative (not condensing)
Power supply unit
AC 100 - 240 V, 50-60 Hz 2,0 A
Input voltage
Balance
DC 12 V, 2 A
Input voltage
Interface RS232C

ADB_ADJ-BA-e-1931 3
KERN ADJ 100-4 ADJ 200-4 ADJ 600-C3
Product no. / Type TADJ 100-4-A TADJ 200-4-A TADJ 600-C3-A
Default weighing unit g g ct
0,001 ct
Readability (d) 0,0001 g 0,0001 g
0,0001 g
600 ct
Weighing range (max) 120 g 210 g
120 g
0,002 ct
Reproducibility 0,0002 g 0,0002 g
0,0002 g
± 0.004ct
Linearity ± 0.0004 g ± 0.0004 g
± 0,0004 g
Adjusting weight internal
Stabilization time 4 sec
Warm-up time 8h
Weighing Units g, oz, ct, lb
Smallest part weight for piece 1 mg (under laboratory conditions)
counting 10 mg (under normal conditions)
Reference quantities at
10, 20, 50,100, 1000
piece counting
Weighing plate, stainless steel ø 90 mm
Dimensions Housing
230 x 310 x 330 230 x 310 x 230
(B x D x H) mm
Net weight (kg) 4,9 3,8
Permissible ambient condition +10° C to +30° C
Humidity of air 20 ~ 85 % relative (not condensing)
Power supply unit
AC 100 - 240 V, 50 - 60 Hz 2,0 A
Input voltage
Balance
DC 12 V, 2A
Input voltage
Interface RS232C

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

www.kern-sohn.com/ce

4 ADB_ADJ-BA-e-1931
3 Device overview
3.1 Components

Pos. Designation
1 Glass windshield
2 Interface RS 232
3 Weighing pan
4 Bubble level
5 Display
6 Keyboard
7 Foot screws
8 Handle for operation of the side windshield doors
9 Mains adapter connection

ADB_ADJ-BA-e-1931 5
3.2 Keyboard overview

Key Designation Function

 Turn on/off
ON/OFF key
 Exit menu

CAL key  Adjustment

 Taring
TARE key  Zeroing
 Save setting

 Switch-over weighing unit

MODE key
 Selecting an application

 How to save the reference

MENU key  Switch on/off background illumination of display
(keep the button pressed for a long time)

 Change setting in the menu

PRINT key
 Print out the displayed value

6 ADB_ADJ-BA-e-1931
3.3 Overview of display

Display Description

Stability display
The balance is in stand-by mode
g Weighing unit [Gram]
ct Weighing unit [Carat]

lb Weighing unit [Pound]

oz Weighing unit [Ounce]

Pcs Application parts counting

% Application percentage determination

ADB_ADJ-BA-e-1931 7
4 Basic Information (General)
4.1 Intended use
The balance you purchased is intended to determine the weighing value of material
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
pan. As soon as a stable weighing value is reached the weighing value can be read.

4.2 Improper Use

Do not use balance for dynamic add-on weighing procedures, if small amounts of
goods to be weighed are removed or added. The “stability compensation“ installed in
the balance may result in displaying an incorrect measuring value! (Example: Slowly
draining fluids from a container on the balance.)
Do not leave permanent load on the weighing pan. This may damage the measuring
system.
Impacts and overloading exceeding the stated maximum load (max) of the balance,
minus a possibly existing tare load, must be strictly avoided. Balance may be
damaged by this.
Never operate balance in explosive environment. The serial version is not explosion
protected.
The structure of the balance may not be modified. This may lead to incorrect
weighing results, safety-related faults and destruction of the balance.
The balance may only be used according to the described conditions. Other areas of
use must be released by KERN in writing.

4.3 Warranty

Warranty claims shall be voided in case

• Our conditions in the operation manual are ignored

• The appliance is used outside the described uses
• The appliance is modified or opened
• Mechanical damage or damage by media, liquids, natural wear and tear
• The appliance is improperly set up or incorrectly electrically connected
• The measuring system is overloaded

8 ADB_ADJ-BA-e-1931
4.4 Monitoring of Test Resources
In the framework of quality assurance the measuring-related properties of the
balance and, if applicable, the testing weight, must be checked regularly. The
responsible user must define a suitable interval as well as type and scope of this test.
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. In
KERN's accredited DKD calibration laboratory test weights and balances may be
calibrated (return to the national standard) fast and at moderate cost.

5 Basic Safety Precautions

5.1 Pay attention to the instructions in the Operation Manual

Carefully read this operation manual before setup and commissioning,

even if you are already familiar with KERN balances.

5.2 Personnel training

The appliance may only be operated and maintained by trained personnel.

6 Transport and storage

6.1 Testing upon acceptance
When receiving the appliance, please check packaging immediately, and the
appliance itself when unpacking for possible visible damage.

6.2 Packaging / return transport

 Keep all parts of the original packaging for a possibly

required return.
 Only use original packaging for returning.
 Prior to dispatch disconnect all cables and remove
loose/mobile parts.
 Pack weighing plate + accessories and power supply unit
separately.
 Secure glass windshield against slipping (e.g. using an
adhesive strip).

ADB_ADJ-BA-e-1931 9
  Secure all parts against shifting and damage as depicted.

10 ADB_ADJ-BA-e-1931
7 Unpacking, Setup and Commissioning
7.1 Installation Site, Location of Use
The balances are designed in a way that reliable weighing results are achieved in
common conditions of use.
You will work accurately and fast, if you select the right location for your balance.

On the installation site observe the following:

• 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.
Non-permitted condensation (condensation of air humidity on the appliance)
may occur if a cold appliance is taken to a considerably warmer environment.
In this case, acclimatize the disconnected appliance for ca. 2 hours at room
temperature.
• Avoid static charge of goods to be weighed or weighing container.

If electro-magnetic fields or static charge occur, or if the power supply is unstable

major deviations on the display (incorrect weighing results) are possible. In that case,
the location must be changed.

ADB_ADJ-BA-e-1931 11
7.2 Unpacking, checking and installation
Open packaging and remove all parts carefully.
Verify that there has been no damage and that all packing items are present.

Scope of delivery / serial accessories

• Balance
• Mains adapter
• Operating instructions

Prior to any installation and assembly works, the balance must

be separated from the mains supply.

 Install the balance at the intended workplace.

The right place is decisive for the accuracy of the weighing results of high-
resolution analytic balances (see chap. 7.1).
 Remove the transportation lock (only models ADJ)

 Put the following parts upon in the right order

• Carrier of weighing plate
• Weighing pan

7.3 Levelling
 Level balance with foot screws until the air bubble of the water balance is in the
prescribed circle.

Check levelling regularly.

12 ADB_ADJ-BA-e-1931
7.4 Electric power supply

Select a country-specific mains plug.

Check, whether the voltage acceptance on the scales is set correctly.

Do not connect the scales to the power grid unless the information on
the instrument (sticker) matches the local mains voltage.
Only use KERN original mains adapter. Using other makes requires
consent by KERN.
Important:
 Prior to commissioning check the mains cable for damage.
 Make sure that the mains adapter will not be in touch with liquids.
 The mains plug must be accessible at any time.
Connect the mains adapter to the connecting socket on the backside of
the balance and to the power mains.
The display unit lights up. As soon as the balance is supplied with energy,
the indicator [ ] is displayed.

The error message <P FAIL> indicates that the balance was
disconnected from power supply without pressing the ON/OFF button.
Remedy:
Press ON/OFF. The device will carry out a display test.
The balance is ready for weighing once the weight indication appears.

7.5 Initial Commissioning

In order to obtain exact results with the electronic balances, your balance must have
reached the operating temperature (see warming up time chap. 1). During this
warming up time the balance must be connected to the power supply (mains,
accumulator or battery).

The accuracy of the balance depends on the local acceleration of gravity.

Strictly observe hints in chapter Adjustment.

7.6 Connection of peripheral devices

Before connecting or disconnecting of additional devices (printer, PC) to the data
interface, always disconnect the balance from the power supply.
With your balance, only use accessories and peripheral devices by KERN, as they
are ideally tuned to your balance.

ADB_ADJ-BA-e-1931 13
8 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 for the first commissioning, after each
change of location as well as in case of fluctuating environment temperature.
To receive accurate measuring values it is also recommended to adjust the balance
periodically in weighing operation.
Observe stable environmental conditions. A warming up time (see chapter 1) is
required for stabilization. Ensure that there are no objects on the weighing pan.

8.1 ADJ Models

8.1.1 Automatic adjustment using a built-in weight

Menu setting <C1-0>, see chapter 11.2.

Automatic adjustment is performed:

• having detected a change in temperature by 2°C from the previous adjustment,
• a defined time interval has elapsed, selectable 2, 3, 4, 6, 8 hours
(C7-0 – C7-4, see chapter 11.2).

14 ADB_ADJ-BA-e-1931
Procedure:

In case of the adjustment error (e.g. object on the plate) the following error
message will be displayed: <CAL NO>, repeat the adjustment procedure.

ADB_ADJ-BA-e-1931 15
8.1.2 Manual initiation of internal adjustment

Menu setting <C1-2>, see chapter 11.2.

Execution:

Press CAL button in the weighing mode.

The adjustment is carried out automatically.

After the successful adjustment the scales will be

automatically switched back to the weighing mode.
In case of the adjustment error (e.g. object on the plate)
the following error message will be displayed:
<CAL NO>, repeat the adjustment procedure.

16 ADB_ADJ-BA-e-1931
8.2 Models ADB
• Carry out adjustment as near as possible to the balance’s maximum
weight (required adjustment weight see chap. 1). Info about adjustment
weights can be found on the Internet at: http://www.kern-sohn.com
• Observe stable environmental conditions. Stabilisation requires a certain
warm-up time.
• Ensure that there are no objects on the weighing pan.
• Ensure menu setting <C1-1>, see chap. 11.2
• In the ADB 200-4A model, adjustment is possible using a 100 g weight,
but this is not the best way in terms of measurement technique.
• For the ADB 600-C3 models, remember that the selected weighing unit is
[gram].

Procedure:

Press CAL in the weighing mode.

The device will display the value of the required

adjustment weight (e.g. 100 g).
In the ADB 200-4A model, select <CAL 200> by
pressing TARE.

Press CAL again, you will see the indication <CAL in>.

No objects may be left on the weighing plate.


Wait until the <CAL dn>, indication, then carefully set
the adjustment weight in the centre of the weighing
plate and close the windshield door.

ADB_ADJ-BA-e-1931 17
 
When the adjustment is successfully completed, you
will see the <CAL up> indication.

Remove the adjustment weight, the balance will be

switched back to the weighing mode.

18 ADB_ADJ-BA-e-1931
9 Basic Operation
9.1 Start-up

As soon as the balance is supplied with energy, the

indicator [ ] is displayed.

To switch on press the ON/OFF key.

The balance carries out a display test.

As soon as the weight display appears, the balance is
ready for weighing.

9.2 Switch into stand-by mode

Press ON/OFF key, the display disappears

The power symbol [ ] will be displayed.

 In stand-by mode the balance is ready for operation immediately after

switching-on without warm-up time.
 To switch off the balance completely, disconnect the cable from the mains.
 The balance starts in the mode, in which it has been switched off.

ADB_ADJ-BA-e-1931 19
9.3 Zeroing
In order to obtain optimal weighing results, reset to zero the balance before weighing.

Unload the balance.

Press the TARE key.

Wait until the zero display appears.

9.4 Sample weighing

Place the goods to be weighed and close the

windshield.

Wait for stability display .
Read weighing result.

Overload warning
Overloading exceeding the stated maximum load (max) of the device, minus
a possibly existing tare load, must be strictly avoided. This could damage the
instrument.
Exceeding the maximum load is indicated by the display „E “. Unload
weighing system or reduce preload.

9.5 Unit Conversion

By repeatedly pressing of the MODE key the weighed value can be switched over to
the available weighing and application units.

20 ADB_ADJ-BA-e-1931
9.6 Weighing with tare
The dead weight of any weighing container may be tared away by pressing a button,
so that the following weighing procedures show the net weight of the goods to be
weighed.

Set balance to zero

Deposit empty weighing container. The result is

displayed.

Wait for stability display, then press the TARE key

The zero display appears.

Weigh the material, the net weight will be indicated.

• When the balance is unloaded the saved taring value is displayed with
negative sign.
• To delete the stored tare value, remove load from weighing pan and
press the TARE key.

ADB_ADJ-BA-e-1931 21
10 Applications
10.1 Parts counting
Before the balance can count parts, it must know the average part weight (i.e. the
reference). Proceed by putting on a certain number of the parts to be counted. The
balance determines the total weight and divides it by the number of parts, the so-
called reference quantity. Counting is then carried out on the basis of the calculated
average piece weight.

1. Select the reference piece number

In weighing mode call up menu item „C2“, see chap.
11.1
Select the desired reference number of pieces using
the PRINT key, see chap. 11.2.
Confirm setting by pressing the TARE key.
Exit menu using ON/OFF key: Confirm query „SAVE“
by pressing the TARE key.
The balance returns automatically into weighing mode

2. Call application

Press the MODE key repeatedly until „Pcs“ is

displayed.

3. Set to zero/taring
Press the TARE key to set the balance to zero or to
tare when using a weighing container.

22 ADB_ADJ-BA-e-1931
 4. Weigh-in reference parts
Place as many counted pieces to add-up as required
by the set reference piece number.
Press the MENU key to save the reference whereupon
the weighing scale automatically calculates an average
weight per part.
Remove reference weight. The balance is now in parts
counting mode and counts all units on the weighing
plate.

5. Count the items

Place load on pan and read the number of pieces.

6. Switch-over display between number of items

and weight
Use the MODE key to switch-over the display to the
available units, see chap. 9.5

Sample protocol 7. Printing

(KERN YKB-01N) The display value will be printed out by connecting an
optional printer and pressing the PRINT key (factory
100 pcs s setting).

• Take care of the minimum weight of the piece (see chap. 1 „Technical
data“).

• The reference weight will remain stored even after the weighing balance
was turned off until the reference is reset.

ADB_ADJ-BA-e-1931 23
10.2 Percent determination
Percentage calculation facilitates weight display in percent related to a reference
weight equivalent to 100 %.

1. Call application
Press the MODE key several times until „%“ is
displayed.

2. Set to zero/taring
Press the TARE key to set the balance to zero or to
tare when using a weighing container.

3. Reference setting (100 % value)

Put a reference weight which corresponds to 100 %.
Store reference by pressing the MENU key.

Remove reference weight.

4. Percent determination
Place goods to be weighed on balance.
The weight of the sample is displayed in percentage in
terms of the reference weight.

5. Switch-over the display between percentage

and weight
Use the MODE key to switch-over the display to the
available units, see chap. 9.5

Sample protocol 6. Printing

(KERN YKB-01N) The displayed value will be printed out by connecting
an optional printer and pressing the PRINT key (factory
49.99 % s setting).

The reference weight (100 %) will remain stored even after the weighing
balance was turned off until the reference is reset.

24 ADB_ADJ-BA-e-1931
11 Menu
11.1 Navigation in the menu

1. Access to menu
 In weighing mode print first the MENU key, then
the PRINT key. The first menu item „C1“
showing the current setting will be displayed.

2. Select menu items

 Press the TARE key to select the individual
menu items showing the current settings one by
one.

3. Change settings
 Press the PRINT key to change the setting of a
selected menu item. Each time the PRINT key
is pressed the next setting will be displayed.

ADB_ADJ-BA-e-1931 25
  Confirm setting with TARE key, the next menu
item will be displayed.
Either carry out more settings or exit and save
menu (see step 4 or 5)

4. How to save settings and to exit the menu

 Press the ON/OFF key, „SAVE“ will be
displayed.

 Any changes carried out are stored by pressing

the TARE key. The balance returns
automatically into weighing mode.

5. Cancel
 Press again the ON/OFF key, no changes will
be saved. The balance returns automatically
into weighing mode.

26 ADB_ADJ-BA-e-1931
11.2 Menu overview

Menu item Settings Description

Adjustment mode C1 - 0 Automatic internal adjustment (ADJ models)
External adjustment (ADB models:
C1 – 1
always use this setting)
C1 - 2 Manual internal adjustment (ADJ models)
Reference quantity C2 – 0* 10
C2 - 1 20
C2 - 2 50
C2 - 3 100
C2 - 4 1000
Automatic C3 - 0 No Zerot Tracking
zero point correction C3 – 1* 1D Zero-point Tracking
C3 - 2 2D Zero-point Tracking
C3 - 3 3D Zero-point Tracking
C3 - 4 4D Zero-point Tracking
C3 - 5 5D Zero-point Tracking
C3 - 6 Not documented
Baud rate C4 - 0 1200
C4 - 1* 2400
C4 - 2 4800
C4 - 3 9600
Data output C5 - 0 Automatic output of stable weighing values
C5 - 1 Via remote control command W (w)
C5 - 2 Continuous data output
Output for stable and instable weighing values
C5 – 3*
after pressing PRINT key
Sound by pressing C6 – 0 switched on
the button C6 - 1* switched off
Automatic internal C7 - 0* 2 hours
adjustment interval (only C7 - 1 3 hours
ADJ models)
C7 - 2 4 hours
C7 - 3 6 hours
C7 - 4 8 hours
Filter C8 - 0* Low interference degree
C8 - 1 Medium interference degree
C8 - 2 High interference degree
C8 - 3 Not documented

* = factory setting

ADB_ADJ-BA-e-1931 27
12 RS232C-interface
For the connection of a peripheral device (printer, computer) the balance is as per
series equipped with a RS232C-interface.

The following conditions must be met to provide successful communication between

the weighing balance and the peripheral devices.
• Connect balance using a suitable cable with the interface of the peripheral
device. Faultless operation requires an adequate KERN interface cable.
• Communication parameters (baud rate, bits and parity) of balance and
peripheral device must match.

This data exchange is asynchronous using ASCII - Code.

12.1 Technical data

Connection 9 pin d-subminiature bushing

Pin 2: Receive data

Pin 3: Transmit data
Pin 5: Signal ground

Baud rate 1200 / 2400 / 4800 / 9600 optional

Parity 8 bits, no parity / 1 stop bit / 1 start bit

28 ADB_ADJ-BA-e-1931
12.2 Interface cable

Balance PC
9-poles 9-poles
2 3

3 2

5 5

Balance Printer
9-poles 9-poles
2 3

3 2

5 5

12.3 Interface parameters

12.3.1 Baud rate

In this menu point the data transfer is adapted to different RS232C-peripheral
devices. The baud rate determines the speed of the data transfer via the serial
interface. For a faultless data transfer, balance and peripheral device must be set to
the same value.

Call up menu item „C4“, see chap. 11.1

Use the PRINT key to select the desired setting.
Options:
C4 - 0 1200 Baud
C4 - 1 2400 baud
C4 - 2 4800 baud
C4 - 3 9600 baud

Save / back to weighing mode, see chap. 11.1

ADB_ADJ-BA-e-1931 29
 12.3.2 Output condition
The data transfer type is determined in this menu item

Call up menu item „C5“, see chap. 11.1

Use the PRINT key to select the desired setting.
Options:
C5 - 0 Automatic output of stable weighing values
C5 - 1 Via remote control command W (w)
C5 - 2 Continuous data output
C5 - 3 Output for stable and instable weighing values
after pressing PRINT key
Save / back to weighing mode, see chap. 11.1

12.4 Sample protocols (KERN YKB-01N)

+ 10.0000 g s Stable/positive weighing value

- 10.0000 g us Instable/negative weighing value

100 pcs s Parts counting (stable weighing value)

49.99 % s Percentage determination (stable weighing value)

12.5 Remote control instructions

Command Terminator
Function
ASCII Hex <CR> <LF>

O 4F 0D 0A Function such as ON/OFF key

T 54 0D 0A Function such as TARE key

C 43 0D 0A Function such as CAL key

M 4D 0D 0A Function such as MODE key

W 57 0D 0A Function such as PRINT key

w 77 0D 0A Function such as PRINT key

30 ADB_ADJ-BA-e-1931
13 Servicing, maintenance, disposal

Before any maintenance, cleaning and repair work disconnect the

appliance from the operating voltage.

13.1 Cleaning
Please do not use aggressive cleaning agents (solvents or similar agents), but a
cloth dampened with mild soap suds. Ensure that no liquid penetrates into the
device. Polish with a dry soft cloth.
Loose residue sample/powder can be removed carefully with a brush or manual
vacuum cleaner.
Spilled weighing goods must be removed immediately.

13.2 Servicing, maintenance

 The appliance may only be opened by trained service technicians who are
authorized by KERN.
 Before opening, disconnect from power supply.

13.3 Disposal
Disposal of packaging and appliance must be carried out by operator according to
valid national or regional law of the location where the appliance is used.

ADB_ADJ-BA-e-1931 31
14 Instant help
In case of an error in the program process, briefly turn off the balance and disconnect
from power supply. The weighing process must then be restarted from the beginning.

Help:
Fault Possible cause

The displayed weight does

not glow. • The balance is not switched on.
• The mains supply connection has been interrupted
(mains cable not plugged in/faulty).
• Power supply interrupted.

The displayed weight is • Draught/air movement

permanently changing
• Table/floor vibrations
• Weighing pan has contact with other objects.
• Electromagnetic fields / static charging (choose a
different location / switch off interfering device if
possible)

The weighing result is • The display of the balance is not at zero

obviously incorrect
• Adjustment is no longer correct.
• The balance is on an uneven surface.
• Great fluctuations in temperature.
• Warm-up time was ignored.
• Electromagnetic fields / static charging (choose a
different location / switch off interfering device if
possible)

14.1 Error messages

E Weighing range exceeded; the set load exceeds the weighing range.
Unload the balance.

E Weighing range exceeded, e.g. weighing plate not installed.

CAL-no Adjustment error.

32 ADB_ADJ-BA-e-1931