KERN WTB-BA-e-1214 User manual
KERN & Sohn GmbH
Ziegelei 1
D-72336 Balingen
E-Mail: info@kern-
sohn.com
Tel: +49-[0]7433- 9933-0
Fax: +49-[0]7433-9933-149
Internet: www.kern-sohn.com
Operating Manual
Electronical Compact Balance
KERN WTB
Version 1.4
07/2012
GB
WTB-BA-e-1214
WTB-BA-e-1214
2
English
1 Introduction
Thank you for purchasing a KERN WTB scale. These scales are rugged, simple to operate, and can be
used without connection to an external power supply. The scale has a menu system which allows it to
be adapted to your needs.
Please read through these Operating Instructions carefully, and always follow them!
1.1 Safety and the environment
–Read through these Operating Instructions carefully, even if you already have ex-
perience of KERN scales. Only ever use your scale as described in the Operating
Instructions. Be sure to follow the instructions for putting your new scale into
operation.
–Do not use the scale in a explosive environment.
– For connectiontothepowersupply use only the AC adapter delivered with the scale.
Before you connect the scale to the power supply check that the voltage stated on the
AC adapter is the same as the local power supply voltage. If it is not, do not connect
the AC adapter under any circumstances but contact your dealer.
– Although your scale is very ruggedly constructed, it is nevertheless a precision
instrument. Impacts to the weighing pan, or placing excessively heavy loads on it, can
damage the scale.
–Observe local and national environmental regulations when disposing of the scale.
The scale is fitted with a storage battery that contains heavy metals. Do not dispose
of the battery as normal waste! Observe local regulations for disposal of environmen-
tally harmful substances.
1.2 Selecting a location
Selecting a suitable location makes a decisive contribution to precise measurement results
and lengthens the service life of the scale:
– Choose a stable, vibration-free surface which is as horizontal as possible.
– Ensure there are no excessive fluctuations in temperature, and no direct sunlight.
– Make sure that the environmental conditions are met (Chapter 9.1).
– Avoid drafts (e.g. from fans or air conditioning).
– After any major change of geographical position, the scale should be newly adjusted
(calibrated) (Chapter 4.3).
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2 Puttingthescaleintooperation
2.1 Remove the transport arrestment
• Remove the 3 screws of the transport arrestment in the weighing-pan
support and the 3 plastic inserts between the weighing-pan support
and the scale housing.
• Place the weighing pan on the scale.
2.2 Leveling the scale
• Level the scale horizontally by turning the leveling screws. The air
bubble of the level indicator must lie within the black inner circle.
2.3 Power supply
The scale is normally powered by the built-in storage battery. The AC adapter is only used for charging
the storage battery. While the battery is being charged, the scale receives power from the power supply
network, so you can still work with the scale even if the battery needs recharging. Battery charging also
continues while the scale is switched off. The time required for recharging depends on how low the charge
in the battery has become. However, to avoid overcharging the battery, do not leave the scale connected
to the power supply with the AC adapter for more than 24 hours.
Battery operation (AC adapter not connected)
Observe the red LED above the battery symbol Y:
LED is not lit: The battery is sufficiently charged.
LED flashes: The charge of the battery is almost exhausted. Connect
the AC adapter as soon as possible to recharge the battery.
Charging the battery/operating from the power supply
The connecting socket for the AC adapter is located underneath the
balance adjacent to the front-left leveling screw. Remove the rubber
plug and connect the AC adapter to the scale and to the power supply.
Observe the red LED above the battery symbol d:
LED flashes: The scale is receiving power from the power supply
network, the battery is being charged.
LED is continuously lit: The battery is fully charged, the AC adapter
can be disconnected again.
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3 Dailyoperation
3.1 Switching the scale on and off
Toswitchthescaleon: Check that there is nothing on the weighing pan.
Press the ON/OFFkey until the display appears. After the scale has been
switched on, it performs a self-test in which all the segments and then
various items of information about the scale are briefly displayed. When
the weight display appears, the scale is ready to weigh and is
automatically set to zero (the LED above the a symbol is lit).
To switch the scale off: Press the ON/OFF key and hold it down until
“OFF” appears in the display. The display then goes out, and the scale
is switched off.
Energy-saving function and automatic switchoff
For battery operation the scale has an energy-saving function and
an automatic switchoff function which can be both activated and
deactivated in the menu (Chapter 4).
If the energy-saving function is activated (factory setting), when the
scale is powered from the battery it automatically switches into
“Standby” mode after two minutes if no weight change takes place
and no key is pressed. The display is filled with decimal points instead
of digits. As soon as a weight is placed on the pan or a key is pressed,
the scale returns to normal weighing mode.
If the automatic switchoff function is activated (it is deactivated at
the factory), the scale switches off automatically after 15 minutes in
“Standby” mode.
3.2 Simple weighing
• Set the scale to zero with the a key. The LED above the a symbol lights as confirmation.
• Place the item to be weighed on the pan. The LED above the a
symbol goes off.
• Read off the weighing result. The LED to the right of the weighing
result shows the current weighing unit (the unit can be changed in
the menu, see Chapter 4).
3.3 Weighing with tare
z000
0FF
......
z000
r478
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• Place the empty weighing container or packaging component on the weighing pan and press the TARE
key to tare the scale. The zero display appears and the LED above the NET (net weight) symbol is lit.
• Place the item to be weighed on the scale and read the result (net
weight of the item being weighed).
The saved tare weight is retained until you either define a new tare, or
press the TARE key when the weighing pan is empty, or switch off the
scale.
Defininglimitvalues
• Press the F key. The current upper limit value is displayed (the LED
above the + symbol is lit). If you want to set an upper limit value,
continue with the next step. If you want to set a lower limit value,
z000
t352
press the ON/OFF key and the LED above the symbol will be lit.
Every time the ON/OFFkey is pressed, the scale changes between the
upper and the lower limit value.
• The first digit of the selected limit value flashes and can now be
changed. If you do not want to change the first digit, press the F key
and the second digit will start to flash. Each time the F key is
pressed, the display moves to the next digit. After the last digit the
display returns to the first digit.
• To change the selected (flashing) digit, press the TARE key repeat-
edly until the desired number is displayed. Then press the F key to
move to the next digit and change this digit.
• To complete the input, press the a key. The scale stores the limit
value and returns to weighing mode.
4 The menu
r400
r400
r400
r400
r500
3.4 Weighing with limit values
You can define an upper and a lower limit value and thereby ensure that the amount of substance weighed
is always exactly within the defined tolerances.
Note: Limit-value monitoring is switched off at the factory and must be activated in the menu if required
(Chapter 4.2, menu item S3). You can also specify in the menu whether the balance should warn of
violations of limit values.
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Weighing with limit values
Weighing in Weighing Mode is made easier for you by the two LEDs above the UNDER and OVER symbols
as well as a beep. The behavior of the two LEDS and the beep depend on the respective setting in the menu
(Chapter 4.2, menu item S3). The table below shows how the two LEDs and the beep behave for various
settings in menu item S3.
S3 = No load on balance Load < lower limit value Load between limit values Load>upperlimit value
1
2
3
4
5
6
UNDER OVER
UNDER OVER
UNDER OVER
UNDER OVER
UNDER OVER
UNDER OVER
UNDER OVER
UNDER OVER
UNDER OVER
UNDER OVER
UNDER OVER
UNDER OVER
UNDER OVER
UNDER OVER
UNDER OVER
UNDER OVER
UNDER OVER
UNDER OVER
UNDER OVER
UNDER OVER
UNDER OVER
UNDER OVER
UNDER OVER
UNDER OVER
UNDER OVER
UNDER OVER
UNDER OVER
UNDER OVER
UNDER OVER
UNDER OVER
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The menu can be used to change the settings of the scale and activate functions. The menu consists of two
parts, the user menu and service mode (see overview in Chapter 4.2).
The user menu contains frequently used settings and functions and is easy to call up.
Service mode provides the same possibilities as the user menu as well as additional functions for the
service technician. To call up service mode a tool is required.
4.1 Operating the menu
Calling up the user menu
With the scale switched off, press the a key and hold it down. Switch on the scale with the ON/OFFkey.
“Setup” appears briefly in the display and then the first menu block of
the user menu (“S1”) appears.
Calling up service mode
Remark: If the scale is verified, the offical seal has to be destroyed.
Once this seal has been destroyed, the scale must be reverified by an
accredited organization, and a new offical seal must be affixed
before the instrument may be used as a verified scale again!
With the scale switched on, remove the cover of the storage battery
underneath the scale (6 screws). Remove the calibration plate (2
screws). To remove the calibration plate, the sticker has to be
destroyed which covers one of the two screws.
Use a small flat-tip screwdriver to short-circuit the two contacts in the
rectangular opening (see arrow).
“Setup” appears briefly in the display and then the first menu block
of service mode (“CTY”) appears.
Selecting the menu block
Press the ON/OFF key to confirm the setting in the current menu block
and then select the next menu block.
Changing the setting
After you have selected the desired menu block, you can use the
TARE key to switch between the available settings. The number of
available settings differs according to the menu block.
Confirming the setting
S1 OFF
S1 OFF
S2 ON
CTX EU
S2 ON
S2 OFF
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When the desired setting has been made (or if there is no need to change
the current setting), it must be confirmed by pressing the ON/OFF key.
The next menu block then appears automatically in the display.
Navigating backwards in the menu
If you wish to navigate backwards in the menu, i.e. display the
previous menu block again, you can do so at any time with the F key.
This way you can check the settings you made and change them
again if necessary.
Quitting the menu
When you have made all the desired settings, press the a key.
You will be asked whether you wish to save the settings (“SAVE”).
Note: This question also appears after the last menu block.
Saving the settings
If you want to save the settings, press the ON/OFF key. When the save
has been done, the scale automatically returns to weighing mode.
Rejecting the settings
If you do not want to save you changes, press the TARE key. The
display shows “Abort”. Press the ON/OFF key and the scale returns to
weighing mode without the changed settings being saved.
Restoring the factory settings
The factory settings can only be restored in servicemode in the menu
block “DEF” (“Default”). If you want to restore the factory settings,
select “DEF YES” and confirm with the ON/OFF key. Then press the
a key and confirm the “SAVE” prompt with the ON/OFF key. Note:
When the factory settings are restored, all individual settings are
lost!
4.3 Adjusting (calibrating) the scale
S2 OFF
S3 O
S3 O
S2 OFF
SAVE
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ABOMT
r478
DEF NO
DEFXES
SAVE
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4.2 Menu overview (user menu and service mode)
Menu block Settings Explanation
CTY Selects the region (determines which weighing units are available under “S5”)
EU Europe
GE USA
DEF Restores the factory settings
No Do not restore the factory settings
Yes Restore the factory settings (happens immediately after confirmation!)
S1 Automatic switchoff function (see description in Chapter 3.1)
Off Deactivates the automatic switchoff function
On Activates the automatic switchoff function
S2 Energy-saving mode (see description in Chapter 3.1)
On Activates the energy-saving mode
Off Deactivates the energy-saving mode
S3 Limit-value monitoring (see description in Chapter 3.4)
0No limit-value monitoring (F key and alarm via beep and LEDs deactivated)
1
2
3 Limit-value monitoring activated, behavior of LEDs and beep (see description in Chapter 3.4).
4
5
6
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Menu block Settings Explanation
S4 Adaptation to the environmental conditions (filter)
0 Very stable environmental conditions, weak filtering of the weighing signal
1 Normal environmental conditions, average filtering of the weighing signal
2Unstable environmental conditions, stronger filtering of the weighing signal
3 Very unstable environmental conditions, very strong filtering of the weighing signal
4 As for setting 0, but with slower updating of the display value
5As for setting 1, but with slower updating of the display value
6 As for setting 2, but with slower updating of the display value
7 As for setting 3, but with slower updating of the display value.
S5 Weighing unit
gGram
kg Kilogram (only available if the region is set to “EU” (Europe), see menu block “CTY”)
lb Pound (only available if the region is set to “GE” (USA), see menu block “CTY”)
oz Ounce (only available if the region is set to “GE” (USA), see menu block “CTY”)
S6 Brightness of the display
0Very bright
1 Bright
2 Dark
3 Very dark
DSP (S7) Type of display
On Weight value is only displayed when stable
Off Weight value is displayed continuously, irrespective of whether it is stable
S8 Resolution of the scale (only available in the user menu when “S9” = “On”)
Off 3000d
On 6000d/7500d (depending on the capacity of the scale)
S9 Access to menu item S8 from the user menu
Off Menu item S8 is not available in the user menu (S8 is only accessible in service mode)
On Menu item S8 is available in the user menu
S10 Extended display
Off Normal weight display depending on the resolution of the balance (see menu item S8)
On Only for tests: Display in d (max. scale capacity = 30,000d), keys a and b disabled
S11 Display of negative weight values
On Display of negative weight values disabled (display shows “oooooo”), taring not possible
Off Display of negative weight values enabled, taring possible (not allowed for certified balances)
S12 Speed of display when removing the load
On Return to zero by display is fast
Off Display returns to zero at normal speed
BAT Type of internal power supply
CH Rechargeable storage battery
D Commercial battery size “D” (IEC “R20”)
GEO Geo adjustment value (adaptation to local gravitational conditions, see table in Chapter 5)
0 ... 31 Factory setting according to region
CAL Scale adjustment (calibration)
No Do not perform adjustment
Yes Perform adjustment (see description in Chapter 4.3)
Except where the factory settings are shown bold, the factory setting depends on the country in which the balance was purchased, on the model of
the balance, or on the respective weights and measures law.
Only the menu blocks shown above with a gray background are available in the user menu; the other menu blocks are only accessible in service mode.
This manual suits for next models
4
Table of contents
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