KERN-SOHN ADB 200-4 Instructions

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KERN & Sohn GmbH

Ziegelei 1

E-Mail: info@kern-sohn.com

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

Internet: www.kern-sohn.com

Operating instructions Analytical balance

KERN ADB-A / ADB-C / ADJ

Version 3.2

D-72336 Balingen

Fax: +49-[0]7433-9933-149

2020-11 GB

ADB_ADJ-BA-e-2032

KERN ADB_ADJ

Operating instructions Analytical balance

Version 3.2 2020-11

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 (Gen eral) .......................................................................... 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 Precauti o ns .............................................................................. 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

8.1 ADJ Models ............................................................................................................................. 14

8.2 Models ADB ............................................................................................................................ 15

9 Basic Operation ........................................................................................... 17

9.1 Start-up .................................................................................................................................... 17

9.2 Switch into stand-by mode .................................................................................................... 17

10 Applications ................................................................................................. 20

11 Menu ............................................................................................................. 23

11.1 Navigation in the menu .......................................................................................................... 23

11.2 Menu overview ........................................................................................................................ 25

12 RS232C-interface ......................................................................................... 26

12.1 Technical data ......................................................................................................................... 26

12.2 Interface cable ........................................................................................................................ 27

12.3 Interface parameters .............................................................................................................. 27

12.3.1 Baud rate .............................................................................................................................. 27

12.3.2 Output condition ................................................................................................................... 28

12.4 Sample protocols (KERN YKB-01N) ..................................................................................... 28

13 Servicing, maintenance, disposal .............................................................. 29

14 Instant help ................................................................................................... 30

14.1 Error messages ...................................................................................................................... 30

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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

0,001 ct

600 ct

0,002 ct

± 0.004ct

Permissible ambient condi ti o n

+10° C to +30° C

Interface

RS232C

Default weighing unit g g ct Readability (d) 0,0001 g 0,0001 g

0,0001 g

Weighing range (max) 120 g 210 g

120 g

Reproducibility 0,0002 g 0,0002 g

0,0002 g

Linearity ± 0.0004 g ± 0.0004 g

± 0,0004 g

Recommended adjusting weight not supplied (class)

100 g (E2) 200 g (E2) 100 g (E2)

Adjustment points 100 g 100 g 100 g

- 200 g Stabilization time 4 sec. Warm-up tim e 8 h Weighing Units Smallest part weight for piece

1 mg (under laboratory conditions)

g, oz, ct, lb

counting

10 mg (under normal conditi o ns )

Reference quantities at piece counting

10, 20, 50,100, 1000

Weighing plate, stainless steel ø 90 mm Dimensions Housing

(B x D x H) mm

230 x 310 x 330

230 x 310 x 230

Net weight (kg) 4,4 3,8

Humidity of air 20 ~ 85 % relative (not condensing) Power supply unit

Input voltage Balance

Input voltage

AC 100 - 240 V, 50-60 Hz 2,0 A

DC 12 V, 2 A

ADB_ADJ-BA-e-2032 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

600 ct

0,002 ct

± 0,0004 g

Warm-up tim e

8 h

Smallest part weight for piece

1 mg (under laboratory conditions)

Reference quantities at piece counting

Dimensions Housing (B x D x H) mm

Permissible ambient condi ti o n

+10° C to +30° C

Power supply unit Input voltage

Readability (d) 0,0001 g 0,0001 g

Weighing range (max) 120 g 210 g

Reproducibility 0,0002 g 0,0002 g

Linearity ± 0.0004 g ± 0.0004 g

Adjusting weight internal Stabilization time 4 sec

Weighing Units

counting

10 mg (under normal condi ti o ns )

g, oz, ct, lb

10, 20, 50,100, 1000

Weighing plate, stainless steel ø 90 mm

0,0001 g

120 g

0,0002 g

± 0.004ct

230 x 310 x 330 230 x 310 x 230

Net weight (kg) 4,9 3,8

Humidity of air 20 ~ 85 % relative (not condensing)

AC 100 - 240 V, 50 - 60 Hz 2,0 A

Balance Input voltage

DC 12 V, 2A

Interface RS232C

2 Declaration of Conformity

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

www.kern-sohn.com/ce

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3 Device o verview

Pos.

Designation

3.1 Components

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 windshie ld doors 9 Mains adapter connection

ADB_ADJ-BA-e-2032 5

3.2 Keyboard overview

Key Designation Function

ON/OFF key

CAL key  Adjustment

TARE key

MODE key

MENU key

PRINT key

 Turn on/off  Exit menu

 Taring  Zeroing  Save setting

 Switch-over weighing unit  Selecting an application

 How to save the reference  Switch on/off background illumination of display

 Change setting in the menu  Print out the displayed value

(keep the button pressed for a long time)

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3.3 Overview of display

Display Description

Stability display The balance is in stand-by mode

g Weighing unit [Gram]

ct lb

Pcs

Weighing unit [Carat] Weighing unit [Pound] Weighing unit [Ounce] Application parts counting Application percentage determination

ADB_ADJ-BA-e-2032 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 f ault s and des tr uct ion 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

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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 T ransport 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-2032 9

 Secure all parts agains t shi fting and damage as depicted.

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7 Unpacking, Setup and Commi s si oning

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 (co ndensation 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-2032 11

7.2 Unpacking, checking and installation

Prior to any installation and assembly works, the balance must be separated from the mains supply.

Open packaging and remove all parts carefully. Verify that there has been no da mag e and that all packing items are present.

Scope of delivery / serial accessories

• Balance

• Mains adapter

• Operating instructions

 Install the balance at the intended workplace.

The right place is decisive for the accuracy of the weighing results of highresolution 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.

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7.4 Electric power supply

Do not connect the scales to the power grid unless the information on

consent by KERN.

Connect the mains adapter to the connecting socket on the backside of

As soon as the balance is supplied with energy,

The error message <P FAIL> indicates that the balance was

The balance is ready for weighing once the weight indication appears.

Select a country-speci fi c mains pl ug . Check, whether the voltage acceptance on the scales is set correctly.

the instrument (sticker) matches the local mains volt ag e. Only use KERN original mains adapter. Using other makes requires

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.

the balance and to the power mains.

The display unit lights up. the indicator [ ] is displayed.

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.

disconnected from power supply without pressing the ON/OFF button. Remedy: Press ON/OFF. The device will carry out a display test.

ADB_ADJ-BA-e-2032 13

8 Adjustment

In case of the adjustment error (e.g. object on the plate) the following error

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 Models ADJ

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).

Procedure:

message will be displayed: <CAL NO>, repeat the adjustment procedure.

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8.1.2 Manual initiation of internal adjustment

After the successful adjustment the scales will be

In case of the adjustment error (e.g. object on the plate) the following error message will be displayed:

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

Execution:

Press CAL button in the weighing mode.

8.2 Models ADB

• Carry out adjustment as near as possible to the balance’s maximum weight (required adjustment weight see chap. 1). In fo abo ut adj us t m ent weights can be found on the Internet at: http://www.kern-sohn.com

The adjustment is carried out automatical l y.

automatically switched back to the weighing mode.

<CAL NO>, repeat the adjustment procedure.

• 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].

ADB_ADJ-BA-e-2032 15

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 windshi eld door .



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.



16 ADB_ADJ-BA-e-2032

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

 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 fro m the mains .  The balance starts in the mode, in which it has been switched off.

Press ON/OFF key, the display disappears

The power symbol [ ] will be displayed.

ADB_ADJ-BA-e-2032 17

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 weig hing and application units.

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9.6 Weighing with tare

When the balance is unloaded the saved taring value is displayed with

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.

• negative sign.

• To delete the stored tare value, remove load from weighing pan and press the TARE key.

Wait for stability display, then press the TARE key

The zero display appears.

Weigh the material, the net weight will be indicated.

ADB_ADJ-BA-e-2032 19

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 socalled 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

3. Set to zero/taring

2. Call application

Press the MODE key repeatedly until „Pcs“ is displayed.

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

20 ADB_ADJ-BA-e-2032

4. Weigh-in reference parts

of the minimum weight of the piece (see chap. 1 „Technical

The reference weight will remain stored even after the weighing balance

Place as many counted pieces to add-up as required by the set reference piece number.

Sample protocol (KERN YKB-01N)

100 pcs s

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 t he weighing plate.

5. Count the item s

Place load on pan and read the number o f pie c es.

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

7. Printing

The display value will be printed out by connecting an optional printer and pressing the PRINT key (factory setting).

• Take care data“).

• was turned off until the reference is reset.

ADB_ADJ-BA-e-2032 21

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 %.

Sample protocol (KERN YKB-01N)

49.99 % s

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 w eig ht.

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

6. Printing

The displayed value will be printed out by connecting an optional printer and pressing the PRINT key (factory setting).

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

22 ADB_ADJ-BA-e-2032

11 Menu

menu items showing the current settings one by

11.1 Navigation in the menu

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.

Select menu items

 Press the TARE key to select the individual

one.

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-2032 23

 Co nfirm 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)

How to save settings and to exit the menu

 Press t he 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.

Cancel

 Press again the ON/OFF key, no changes will

be saved. The balance retur ns aut om ati c all y into weighing mode.



24 ADB_ADJ-BA-e-2032

11.2 Menu overview

Adjustment mode

C1 - 0

Automatic internal adjustment (ADJ models)

C1 - 2

Manual internal adjustment (ADJ models)

Reference quantity

C2 – 0*

C3 – 1*

1D Zero-point Tracking

C3 - 2

2D Zero-point Tracking

Baud rate

C4 - 0

1200

C4 - 1*

2400

C4 - 2

4800

Output for stable and instable weighing values

C6 - 1*

switched off

Automatic internal

C7 - 0*

2 hours

C7 - 1

3 hours

C8 - 1

Medium interference degree

C8 - 2

High interference degree

Menu item Settings Description

External adjustment (ADB models: always use this setting)

C1 – 1

C2 - 1 20 C2 - 2 50 C2 - 3 100 C2 - 4 1000

Note: At the models with internal adjustment weight the adjustment with external weight is not recommended..

Automatic zero point correction

Data output C5 - 0 Automatic output of stable weighing values

Sound by pressing the button

C3 - 0 No Zerot Tracking

C3 - 3 3D Zero-point Tracking C3 - 4 4D Zero-point Tracking C3 - 5 5D Zero-point Tracking C3 - 6 Not documented

C4 - 3 9600

C5 - 1 Via remote control command W (w) C5 - 2 Continuous data output

C5 – 3* C6 – 0 switched on

after pressing PRINT key

adjustment interval (only ADJ models)

Filter C8 - 0* Low interference degree

* = factory setting

C7 - 2 4 hours C7 - 3 6 hours C7 - 4 8 hours

C8 - 3 Not documented

ADB_ADJ-BA-e-2032 25

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

Baud rate 1200 / 2400 / 4800 / 9600 optional Parity 8 bits, no parity / 1 stop bit / 1 start bit

Pin 2: Receive data Pin 3: Transmit data Pin 5: Signal ground

26 ADB_ADJ-BA-e-2032

12.2 Interface cable

Balance 9-poles

PC 9-poles

Balance 9-poles

Printer 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-2032 27

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 C5 - 1

Automatic output of stable weighing values 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

ASCII Hex <CR> <LF>

O 4F 0D 0A T 54 0D 0A C 43

Function such as ON/OFF key Function such as TARE key Function such as CAL key

Function

M 4D W 57

w 77

0D 0D

0A 0A

Function such as MODE key Function such as PRINT key

Function such as PRINT key

28 ADB_ADJ-BA-e-2032

13 Servicing, maintenance, di s pos al

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-2032 29

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/ faul ty).

• Power supply interrupted.

The displayed weight is permanently changing

The weighing result is obviously incorrect

• Draught/air movement

• 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 display of the balance is not at zero

• Adjustment is no longer correct.

• The balance is on an uneven surface.

• Great fluctuations in temperature.

• Warm-up time was ignored.