KERN & Sohn GmbH
Ziegelei 1
D-72336 Balingen
email: info@kern-sohn.com
Tel: +49-[0]7433- 9933-0
Fax: +49-[0]7433-9933-149
Internet: www.kern-sohn.com
Instruction Manual
Pocket scale
KERN TAB
Version 1.1
03/2013
GB
TAB-BA-e-1311
2
GB
KERN TAB
Version 1.1 03/2013
Instruction Manual
Pocket scale
Contents
1 Technical data ................................................................................................ 3
2 Basic Information (General) .......................................................................... 4
2.1 Proper use ................................................................................................................................. 4
2.2 Improper Use............................................................................................................................. 4
2.3 Warranty .................................................................................................................................... 4
2.4 Monitoring of Test Resources ................................................................................................. 4
3 Basic Safety Precautions .............................................................................. 5
3.1 Pay attention to the instructions in the Operation Manual .................................................. 5
3.2 Personnel training .................................................................................................................... 5
4 Transportation & Storage .............................................................................. 5
4.1 Testing upon acceptance ........................................................................................................ 5
4.2 Packaging .................................................................................................................................. 5
5 Appliance overview ....................................................................................... 6
6 Unpacking, Setup and Commissioning ....................................................... 7
6.1 Installation Site, Location of Use ............................................................................................ 7
6.2 Unpacking ................................................................................................................................. 7
6.2.1 Scope of delivery ........................................................................................................................ 7
6.3 Battery operation and change ................................................................................................. 8
6.4 Initial Commissioning .............................................................................................................. 8
6.5 Adjustment ................................................................................................................................ 8
6.6 Adjusting ................................................................................................................................... 8
7 Operation Mode ............................................................................................. 9
7.1 Keyboard overview ................................................................................................................... 9
7.2 Operation ................................................................................................................................. 10
7.2.1 Weighing ................................................................................................................................... 10
7.2.2 Taring........................................................................................................................................ 11
7.2.3 External weighing units ............................................................................................................. 12
7.3 Display background illumination .......................................................................................... 12
8 Service, maintenance, disposal .................................................................. 13
8.1 Cleaning................................................................................................................................... 13
8.2 Service, maintenance ............................................................................................................. 13
8.3 Disposal ................................................................................................................................... 13
9 Instant help ................................................................................................... 14
TAB-BA-e-1311
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KERN
TAB 20-3
Weighing range (max)
20 g
Readability (d)
0.001 g
Recommended adjustment weight,
added
10 g
(F2)
Weighing Units
ct, g, gn
Stabilization time (typical)
3 sec.
Operating temperature
+ 10° C …. + 30° C
Humidity of air
15 % - 80 % (non-condensing)
Dimensions of the housing
(W x D x H) [mm]
95 x 133 x 33
Weighing plate [mm]
Ø 18
Weight (net)
200 g
1 Technical data
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2 Basic Information (General)
2.1 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.
2.2 Improper Use
Do not use 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
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.
2.3 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
2.4 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.
TAB-BA-e-1311
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Carefully read this operation manual before setup and
commissioning, even if you are already familiar with KERN
balances.
Versions in other languages are non-binding translations.
The only binding version is the original document in German.
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.
Reattach possibly supplied transport securing devices.
Secure all parts such as the glass wind screen, the
weighing platform, power unit etc. against shifting and
damage.
3 Basic Safety Precautions
3.1 Pay attention to the instructions in the Operation Manual
3.2 Personnel training
The appliance may only be operated and maintained by trained personnel.
4 Transportation & Storage
4.1 Testing upon acceptance
When receiving the appliance, please check packaging immediately, and the
appliance itself when unpacking for possible visible damage.
4.2 Packaging
TAB-BA-e-1311
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1
Wind screen / hinged cover serving as pressure and dust protection
2
Adjustment weight
3
Weighing surface
4
Weighing vessel
5 Appliance overview
TAB-BA-e-1311
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Pocket scale
Batteries
Instruction Manual
Adjustment weight
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 appliance for ca. 2 hours at room temperature.
Avoid static charge of goods to be weighed and weighing container.
The occurrence of electromagnetic fields, electrostatic charging as well as instable
power supply may result in considerable display variations (incorrect weighing
results). In that case, the location must be changed.
6.2 Unpacking
Carefully remove the balance from the packaging, remove plastic cover and setup
balance at the intended workstation.
6.2.1 Scope of delivery
Serial accessories:
TAB-BA-e-1311
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6.3 Battery operation and change
Switch on scale by and wait for “0.0“ to appear
on the screen
Press and hold until “ZERO“ appears flashing
Confirm by pressing and the value of the
adjustment weight will be shown flashing
Position the adjustment weight; after a while “PASS“
appears; this concludes the adjustment process.
Afterwards the scale switches off automatically.
In order to save the battery, the balance switches automatically off after 30 seconds
without weighing.
If the balance is not used for a longer time, take out the batteries and store them
separately. Leaking battery liquid could damage the balance.
6.4 Initial Commissioning
The warm-up period after the start stabilises the measured values.
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.
Procedure when adjusting:
Observe stable environmental conditions.
TAB-BA-e-1311
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Key
Description
Function
Short key pressing
CAL-key
Adjusting (Press and hold key for a long time)
Backlighting ON/OFF
UNIT-key
Weighing units switch-over
TARE button
Tare = Return display to zero
ON/OFF-switch
Turn on/off
7 Operation Mode
7.1 Keyboard overview
TAB-BA-e-1311
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Start balance by pressing
The balance shows for approx. 3 seconds
„HELLO“ in the display and then goes to „0.0“.
Now it is ready for operation.
If display does not show ”0“, press .
Put on items to be weighed,
weighed value is displayed.
(Example)
If the material to be weighed is heavier than the
weighing range, the display will show „OVER"
(=Overload).
7.2 Operation
7.2.1 Weighing
TAB-BA-e-1311
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Press to switch on scale by
and wait for “0.0“
display.
Put the tare vessel on the weighing plate and
press the button.
The scale display returns to „“0.0“.
(Example)
Pour object to be weighed into container and read
the measured value.
(Example)
Renewed pressing of
after the weighing process results in “0” returning
to the display screen.
7.2.2 Taring
The taring process can be repeated any number of times, e.g. when adding several
components for a mixture (adding).
The limit is reached when the whole weighing range is exhausted.
After removing the taring container the total weight is displayed as negative display.
TAB-BA-e-1311
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Press
to switch on scale and wait for “0.0“
display.
Use to select the different units g, ct und gn.
Pour object to be weighed into container and read
the measured value.
(Example)
Gram g *
ct
gn
20 g
100.00 ct
308.64 gn
7.2.3 External weighing units
The following weighing units are available:
*default setting
7.3 Display background illumination
The display unit can be kept on or off. For this press shortly .
TAB-BA-e-1311
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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.
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.
TAB-BA-e-1311
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9 Instant help
Fault
Possible cause
The displayed weight does not glow.
The balance is not switched on.
Batteries are inserted incorrectly or empty
No batteries inserted.
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)
In case of a fault in the program sequence, the balance should be shortly switched
off. The weighing process must then be restarted from the beginning.
Help:
Should other error messages occur, switch balance off and then on again. If the error
message remains inform manufacturer.
TAB-BA-e-1311
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