KERN VHB User 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
Pallet truck scale
KERN VHB
Version 1.4
2018-03
GB
VHB-BA-e-1814

VHB-BA-e-1814
2
GB
KERN VHB
Version 1.4 2018-03
Operating instruction
Pallet truck scale
Table of Contents
1Technical data ................................................................................................... 4
2Declaration of conformity ................................................................................. 5
3Basic instructions for scales............................................................................ 6
3.1 Proper use................................................................................................................................. 6
3.2 Improper Use ............................................................................................................................ 6
3.3 Warranty.................................................................................................................................... 6
3.4 Monitoring of Test Resources................................................................................................. 7
4Basic safety instructions for scales ................................................................ 7
4.1 Pay attention to the instructions in the Operation Manual.................................................. 7
4.2 Personnel training.................................................................................................................... 7
5Transport and storage ...................................................................................... 7
5.1 Testing upon acceptance ........................................................................................................ 7
5.2 Packaging.................................................................................................................................. 7
6Unpacking, S etup and C ommis s ioning ........................................................... 8
6.1 Site of installation, place of operation for scales ................................................................. 8
6.2 Scope of delivery...................................................................................................................... 9
6.3 Battery operation...................................................................................................................... 9
6.4 Commissioning......................................................................................................................... 9
6.5 Overview of display................................................................................................................ 10
6.6 Keyboard overview................................................................................................................. 11
7Functions of dis play unit ................................................................................ 12
7.1 Prior to weighing: ZERO-POINT CHECK.............................................................................. 12
7.2 Gross weighing....................................................................................................................... 12
7.3 Net weighing: TARING BY PRESSING A BUTTON.............................................................. 12
7.4 Net weighing: MANUAL TARE INPUT................................................................................... 12
7.5 Addition of individual weighings.......................................................................................... 14

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8S ervice, maintenance, dis pos al ..................................................................... 15
8.1 Cleaning .................................................................................................................................. 15
8.2 Service, maintenance............................................................................................................. 15
8.3 Disposal................................................................................................................................... 15
9Error messages ............................................................................................... 15
10 Instant help................................................................................................... 16

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1 Technical data
KERN VHB 2T1
Readability (d) 1 kg
Weighing range (max) 2000 kg
Reproducibility 1 kg
Linearity ± 2 kg
Stabilization time 3 sec.
Allowable ambient
temperature
-10° C .... + 40° C
Humidity of air
max. 95 % (not condensing)
Weighing Units
kg, lb
Electric Supply
4 x 1.5V AA batteries
Operating time 80 h/approx.1700 weightings
Auto Off
3 min
Net weight
125 kg
Dimensions:

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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 Basic instructions for scales
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 instructions for scales
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.

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6 Unpacking, Setup and Commissioning
6.1 Site of installation, place of operation for scales
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:
The load must be lifted clear of the display unit’s case and other pallets.
Incorrect lifting of a load
Correct lifting of a load
The accuracy of the weighing system is falling by approximately 0.1 % per
degree if there is a slant of more than 2°. Holes and unevenness, too, have
this effect. A smooth floor is ideal.
Optimum accuracy in weighing results is achieved if the load centre is
between the forks. The forks are easily bent and twisted when the load is off-
centre. This may result in diminished accuracy. In verifiable models off-centre
loads, or slants affecting accuracy, activate the inclination switch which in turn
disconnects the display.
Non-optimal positioning of load
Optimal positioning of load
Temperature range: The maximum deviation for 0.1% of the weighed load is
between -10 and +40°C. Outside this temperature range deviations of up to
0.3% may occur.
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.
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 Scope of delivery
Standard accessory:
•Pallet truck scale
•4 x 1.5V AA batteries
•Operating Manual
6.3 Battery operation
To change the batteries, unscrew and take off the cover of the battery compartment
at the back of the display unit. Replace the used batteries with new ones (4 x 1.5V
AA batteries) (Pay attention to correct polarity) and reinsert the battery cover.
In order to save the battery, the balance switches automatically off after 3 minutes
without weighing.
Used batteries are indicated by “LO-BA“, on the display. Change the batteries
immediately.
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 Commissioning
To activate the weighing system, press the key.
The operating temperature for the electronic system and the weighing cells will have
been reached after three to five minutes. . Prior to this, deviations of c. 0.3% are
possible.
Loads should not be lifted before this zero adjust is complete.
ON/ OFF
UNIT
Cover battery compartment

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6.5 Overview of display
THE DISPLAY
The three displays provide the following information:
◄
The weighing system (incl. load) is stable
▬
The indicated weight has a negative value
NET
◄
The indicated value is a net weight
DISPLAY- MESSAGES
The following messages may appear on the display:
HELP 1
Weighing system overloaded
HELP 2
Taring impossible due to negative gross weight
HELP 3
Negative signal of load cells to A-D converter / slant
HELP 4
Entered tare weight is too high. Press the
key again in order to
cancel the HELP display and enter a new, reduced tare weight.
HELP 7
The signal of the load cells on the A-D converter is too high.
LO-BA
The storage battery status is too low; charge storage battery.
PRE-
TARE