KERN GAB 3K1DM, GAB 6K2DM, GAB 15K5DM, GAB 30K10DM, GAS 3K1DM Operating Instructions Manual

KERN & Sohn GmbH

Ziegelei 1
D-72336 Balingen
E-Mail: [e-mail]

Tel: +49-[0]7433- 9933-0
Fax: +49-[0]7433-9933-149
Internet: www.kern-sohn.com

Operating instruction
Compact balance

KERN GAB/GAS/FAB

Version 2.0
01/2007

GB

GAB/GAS/FAB-BA-e-0720

GAB/GAS/FAB-BA-e-0720

2

GB

KERN GAB/GAS/FAB

Version 2.0 01/2007

Operating instruction
Compact Balance

Table of Contents

1 Technical data__________________________________________________ 4
2 Declaration of conformity ________________________________________

6

3 Basic Information (General)_______________________________________

8

3.1 Proper use_______________________________________________________ 8

3.2 Improper Use ____________________________________________________ 8

3.3 Warranty ________________________________________________________ 8

3.4 Monitoring of Test Resources_______________________________________ 9

4 Basic Safety Precautions_________________________________________ 9

4.1 Pay attention to the instructions in the Operation Manual________________ 9

4.2 Personnel training ________________________________________________ 9

5 Transport and storage ___________________________________________ 9

5.1 Testing upon acceptance __________________________________________ 9

5.2 Packaging _______________________________________________________ 9

6 Unpacking, Setup and Commissioning ____________________________

10

6.1 Installation Site, Location of Use ___________________________________ 10

6.2 Unpacking ______________________________________________________ 11

6.2.1 Setup ______________________________________________________________ 11

6.2.2 Scope of delivery _____________________________________________________ 11

6.3 Mains supply or battery operation __________________________________ 11

6.4 Initial Commissioning ____________________________________________ 13

6.5 Adjustment _____________________________________________________ 13

6.6 Adjusting_______________________________________________________ 13

6.7 Verification _____________________________________________________ 15

7 Operation_____________________________________________________

18

7.1 Operating elements ______________________________________________ 18

7.1.1 Keyboard overview for both model ranges__________________________________ 18

7.1.2 Display Overview GAB _________________________________________________ 19

7.1.3 Display Overview FAB _________________________________________________ 19

7.2 Operation_______________________________________________________ 20

7.2.1 How to turn on/off balance ______________________________________________ 20

7.2.2 Resetting balance to zero_______________________________________________ 20

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7.2.3 Tare weighing (taring)__________________________________________________ 21

8 Service, maintenance, disposal___________________________________ 22

8.1 Cleaning _______________________________________________________ 22

8.2 Service, maintenance_____________________________________________ 22

8.3 Disposal________________________________________________________ 22

9 Instant help ___________________________________________________ 23

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1 Technical data

KERN GAB 3K1DM GAB 6K2DM GAB 15K5DM GAB 30K10DM
Readability / calibration

value

1 g / 2 g 2 g / 5 g 5 g / 10 g 10 g / 20 g

Weighing range 1.5 kg / 3 kg 3 kg / 6 kg 7.5 kg / 15 kg 15 kg / 30 kg
Warm-up time 10 minutes 10 minutes 10 minutes 10 minutes
Recommended

adjustment weight incl.
category

3 kg (M3) 6 kg (M3) 15 kg (M3) 30 kg (M3)

Operating temperature - 5° C .... + 40° C

Humidity of air max. 80 % (not condensing)
Housing (B x D x H) mm 236 x 282 x 102 - 108 286 x 363 x 102 - 124
We i g h i n g p l a t e (w x d ) m m 230 x 180 280 x 260
Weight kg (net) 2 3,2

KERN GAS 3K1DM GAS 6K2DM GAS 15K5DM GAS 30K10DM
Readability / calibration

value

1 g / 2 g 2 g / 5 g 5 g / 10 g 10 g / 20 g

Weighing range 1.5 kg / 3 kg 3 kg / 6 kg 7.5 kg / 15 kg 15 kg / 30 kg
Warm-up time 10 minutes 10 minutes 10 minutes 10 minutes
Recommended

adjustment weight incl.
category

3 kg (M3) 6 kg (M3) 15 kg (M3) 30 kg (M3)

Operating temperature - 5° C .... + 40° C

Humidity of air max. 80 % (not condensing)
Housing (B x D x H) mm 236 x 282 x 102 - 108 286 x 363 x 102 - 124
Weighing plate (w x d)

mm

230 x 180 280 x 260

Weight kg (net) 2 3,2
Reverse display yes yes

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KERN FAB 3K1DIPM FAB 6K2DIPM FAB 15K5DIPM
Readability / calibration

value

1 g / 2 g 2 g / 5 g 5 g / 10 g

Weighing range 1.5 kg / 3 kg 3 kg / 6 kg 7.5 kg / 15 kg
Warm-up time 10 minutes 10 minutes 10 minutes
Recommended

adjustment weight incl.
category

3 kg

(M3)

6 kg

(M3)

15 kg

(M3)

Operating temperature - 5° C .... + 40° C

Humidity of air max. 95 % (not condensing)
Housing (B x D x H) mm 260 x 320 x 130
Weighing plate (w x d)

mm

229 x 196

Weight kg (net) 3,2
Protection classification

IP 65

Yes, battery operation only

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2 Declaration of conformity

KERN & Sohn GmbH

D-72322 Balingen-Frommern
Postbox 4052
email: [e-mail]

Phone: 0049-[0]7433- 9933-0
Fax: 0049-[0]7433-9933-149
Internet: www.kern-sohn.de

Declaration of conformity

Declaration of conformity for apparatus with CE mark

Konformitätserklärung für Geräte mit CE-Zeichen

Déclaration de conformité pour appareils portant la marque CE

Declaración de conformidad para aparatos con marca CE

Dichiarazione di conformità per apparecchi contrassegnati con la marcatura CE

English

We hereby declare that the product to which this declaration refers conforms to the
following standards.

Deutsch

Wir erklären hiermit, dass das Produkt, auf das sich diese Erklärung bezieht, mit den
nachstehenden Normen übereinstimmt.

Français

Nous déclarons avec cela responsabilité que le produit, auquel se rapporte la présente
déclaration, est conforme aux normes citées ci-après.

Español

Manifestamos en la presente que el producto al que se refiere esta declaración está de
acuerdo con las normas siguientes

Italiano

Dichiariamo con ciò che il prodotto al quale la presente dichiarazione si riferisce è
conforme alle norme di seguito citate.

Electronic Scale: KERN GAB, GAS, FAB

Mark applied EU Directive Standards

89/336/EEC EMC
73/23/EEC, 92/31/EEC, 93/68/EEC

EN 45501
EN 55011, Group 1, Class B
EN 61000-3-3 : 1995
EN 60950

Date: 10.01.2007 Signature:

Gottl. KERN & Sohn GmbH
Management

Gottl. KERN & Sohn GmbH, Ziegelei 1, D-72336 Balingen, Tel. +49-[0]7433/9933-0,Fax +49-[0]7433/9933-149

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KERN & Sohn GmbH

D-72322 Balingen-Frommern
Postbox 4052
email: [e-mail]

Phone: 0049-[0]7433- 9933-0
Fax: 0049-[0]7433-9933-149
Internet: www.kern-sohn.de

Declarations of conformity

Declaration of conformity for apparatus with CE mark

Konformitätserklärung für Geräte mit CE-Zeichen

Déclaration de conformité pour appareils portant la marque CE

Declaración de conformidad para aparatos con marca CE

Dichiarazione di conformità per apparecchi contrassegnati con la marcatura CE

English

We hereby declare that the product to which this declaration refers conforms to the
following standards.

This declaration is only valid with the certificate of conformity by a notified body.

Deutsch

Wir erklären hiermit, dass das Produkt, auf das sich diese Erklärung bezieht, mit den
nachstehenden Normen übereinstimmt.

Diese Erklärung gilt nur in Verbindung mit der Konformitätsbescheinigung einer
benannten Stelle.

Français

Nous déclarons avec cela responsabilité que le produit, auquel se rapporte la présente
déclaration, est conforme aux normes citées ci-après.

Cette déclaration est valide seulement avec un certificat de conformité d´un
organisme notifié.

Español

Manifestamos en la presente que el producto al que se refiere esta declaración está de
acuerdo con las normas siguientes

Esta declaración solo será válida acompañada del certificado de conformidad de
una institución nombrada.

Italiano

Dichiariamo con ciò che il prodotto al quale la presente dichiarazione si riferisce è
conforme alle norme di seguito citate.

Questa dichiarazione sarà valida solo se accompagnata dal certificato di conformità
di un ente riconosciuto.

Electronic Scale: KERN GAB, GAS, FAB

EU Directive Standards

EC-type-approval
certificate no.

Issued by

90/384/EEC, 93/68/EEC EN 45501 T6171

NMI

Date: 10.01.2007

Signature:

Gottl. KERN & Sohn GmbH
Management

Gottl. KERN & Sohn GmbH, Ziegelei 1, D-72336 Balingen, Tel. [phone],Fax [phone]

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3 Basic Information (General)

3.1 Proper 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
plate. As soon as a stable weighing value is reached the weighing value can be read.

3.2 Improper Use

Do not use balance for dynamic weighings. 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
draining fluids from a container on the balance.)
Do not leave permanent load on the weighing plate. 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
damage 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.

3.3 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 and damage caused 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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3.4 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.

4 Basic Safety Precautions

4.1 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.

4.2 Personnel training

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

5 Transport and storage

5.1 Testing upon acceptance

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

5.2 Packaging

Keep all parts of the original packaging in case you need to return the appliance.
Only use original packaging for returning.
Before sending, disconnect all connected cables and loose/movable parts.
Secure all parts such as power packs etc. against dislocation and damage.

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6 Unpacking, Setup and Commissioning

6.1 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.

Therefore, observe the following for the installation site:

- 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 charging of the material to be weighed, weighing container and

windshield.

Major display deviations (incorrect weighing results) may be experienced should
electromagnetic fields (e.g. due to mobile phones or radio equipment), static
electricity accumulations or instable power supply occur. Change location or remove
source of interference.

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6.2 Unpacking

Carefully remove the balance from the packaging, remove plastic cover and setup
balance at the intended workstation.

6.2.1 Setup

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

6.2.2 Scope of delivery

Serial accessories:

KERN GAB / GAS / FAB

• Balance

• Operating Manual

• Mains adapter

6.3 Mains supply or battery operation

Power is supplied via the external mains adapter. The stated voltage value must be
the same as the local voltage.
Only use original KERN mains adapters. Using other makes requires consent by
KERN.

Output voltage mains adaptor: 3.2 V to 6.0 V CD (polarity: inside PLUS)
The balance switches off automatically according to the pre-defined disconnecting

time. To achieve this, keep the MODE key pressed down for 6 seconds, then tap the

MODE key repeatedly and store the selected disconnecting time by pressing the
TARE key.

The following applies:

• P 0: Balance not turning off.

• P 1: Balance turning off automatically after 20 minutes

• P 2: Balance turning off automatically after 60 minutes

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For battery operation unscrew the battery cover at the bottom.
Insert two 1.5 V batteries (D type). Screw battery cover back on.

Model GAB / GAS

Model FAB

Battery cover Connection of mains adapter
under batteries

Empty batteries are indicated on the display by „ „. Press ON/OFF-key and
replace the batteries immediately.

Battery cover

Connection of mains adapter

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6.4 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.

6.5 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. To receive accurate measuring
values it is also recommended to adjust the balance periodically in weighing
operation.

6.6 Adjusting

With an adjustment weight, the weighing accuracy can be checked and re-adjusted
at any time.

Attention:

In the verified balances the adjustment is not possible.
(see chapter 6.7 Verification).

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Procedure when adjusting:

Observe stable environmental conditions. A warming up time (see chapter 1) is
required for stabilization.

Operation Display

Switch off the balance

Press and hold the TARE key and operate the ON/OFF key.

Release the TARE key. If display message deviates from (C1 7 / see on
right), this can be changed by pressing the MODE key. Afterwards
press the TARE key.

XX = model related display

41 = GAB / GAS 3K1DM / 42 = GAB / GAS 6K2DM
43 = GAB / GAS 15K5DM / 34 = GAB / GAS 30K10DM
41 = FAB 3K1DIPM / 42 = FAB 6K2DIPM
43 = FAB 15K5DIPM

Press the TARE key.

Press MODE key (value should be between 1000 and 25000).
Note: The display value is instable (extremely shock sensitive)

Press MODE key produces a value of c. 5000
(Ensure stable ambient conditions, do not load weighing plate)

Press resetting key, if value deviates from 5000

Place adjustment weight (See chpt. 1 technical specifications) carefully
in the centre of the weighing plate, press MODE key.
a value of c. 35000 appears, if deviation is in excess of 5000,
repeat sequence of operation.
Note: The display value is instable
(extremely shock sensitive)

Remove adjustment weight, adjustment complete.
Operate the adjustment switch at the bottom end of the balance (See
picture below) adjustment will be stored. Turn off balance by
pressing the ON/OFF key.

C1 7

L003b

C3

13842

5,010 kg

5,000 kg

CAL

kg

35,000 kg

P-EP

C2 XX

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Model GAB / GAS Model FAB

Adjustment switch

• The adjustment switch is positioned next to the front foot screw underneath
the balance.

• Press a long blunt object (e.g. pencil lead) in the housing hole.

6.7 Verification

General introduction:
According to EU directive 90/384/EEC balances must be officially verified if they are

used as follows (legally controlled area):

a) For commercial transactions if the price of goods is determined by weighing.
b) For the production of medicines in pharmacies as well as for analyses in the

medical and pharmaceutical laboratory.
c) For official purposes
d) For manufacturing final packages

In cases of doubt, please contact your local trade in standard.

Adjustment switch

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Verification instructions
An EU type approval exists for balances described in their technical data as

verifyable. If a balance is used where obligation to verify exists as described above, it
must officially verified and re-verified in regular intervals.
Re-verification of a balance is carried out according to the respective national
regulations. The validity for verification of balances in Germany is e.g. 2 years.
The legal regulation of the country where the balance is used must be observed!
The adjustment switch is inside the balance. After verification the balance is sealed at
the indicated positions.

Verification of the balance is invalid without the "seal".

Position of the “official seals“:

GAB / GAS 3K1DM GAB / GAS 15K5DM

GAB / GAS 6K2DM GAB / GAS 30K10DM

Seals

Seals

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FAB 3K1DIPM
FAB 6K2DIPM
FAB 15K5DIPM

Seals

Balances with obligation to verify must be taken out of operation if:

- The weighing result of the balance is outside the error limit. Therefore

load balance at regular intervals with known test weight and compare the
display value.

- The reverification deadline has been exceeded.

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7 Operation

7.1 Operating elements

Similar for models GAB/GAS / FAB

7.1.1 Keyboard overview for both model ranges

ON/OFF key

TARE key

Selection key / auto power function

Zeroing key

Weighing
plate

Display

Adaptable
feet

Bubble level

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7.1.2 Display Overview GAB

Stability display

Illuminated when display of

weight value is stable

indicated

Zeroing display

Illuminated when display of

weight is zero

Net display

Illuminated when tare value

is stored

7.1.3 Display Overview FAB

Stability display

Illuminated when display of

weight value is stable

indicated

Zeroing display

Illuminated when display of

weight is zero

Net display

Illuminated when tare value

is stored

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7.2 Operation

7.2.1 How to turn on/off balance

1. To turn on the balance press the ON/OFF key.
The balance will carry out a self-test

2. The balance is ready for weighing when the
weight display appears.

3. To turn the balance off, keep the ON/OFF key
pressed down for 1-2 seconds.

7.2.2 Resetting balance to zero

Environmental influences can lead to the exact figure of “0.00“ not being displayed in
spite of an empty weighing dish. It is, however, possible to reset your balance to zero
at any time and thus ensure that weighing really does commence at zero. Setting to
zero when a weight is applied is only possible within a certain type-dependent range.
In the event that the balance cannot be reset to zero with an applied weight, this
range has been exceeded.

1. If the balance despite of uncharged weighing
plate does not show exactly zero, press the
Reset key.

2. Your balance will be set to zero after a short
standby time.

OK

OK

OK

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7.2.3 Tare weighing (taring)

The dead weight of any weighing container can be tared off by pressing the button in
order to ensure the net weight of the goods to be weighed in subsequent weighings is
always displayed.

1. Place empty tare container on the weighing plate.
The total weight of the container is displayed.

2. To tare, press the TARE key.

3. Zero will be displayed once taring is complete and
the symbol NET for net weight will appear. The
balance is now ready for operation.

Information:
The balance is able to only store one taring value at

a time.

When the balance is unloaded the saved taring

value is displayed with negative sign.

To delete the stored tare value, remove all items

form the weighing plate and press then the TARE
key.

OK

OK

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8 Service, maintenance, disposal

8.1 Cleaning

Before cleaning, please disconnect the appliance from the operating voltage.

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 and
wipe 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.

8.2 Service, maintenance

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

8.3 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.

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9 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.

• Batteries are inserted incorrectly or empty

• Maximum load for balance exceeded

The displayed weight is permanently
changing

• Draught/air movement

-

• Table/floor vibrations

• The weighing plate is in contact with

foreign matter.

• Electromagnetic fields / static charging
(choose different location/switch off
interfering device if possible)

The weighing value is obviously

• The display of the balance is not at zero

wrong

• Adjustment is no longer correct.

• Great fluctuations in temperature.

• Electromagnetic fields / static charging

(choose different location/switch off
interfering device if possible)

Should other error messages occur, switch balance off and then on again. If the error
message remains inform manufacturer.