KERN & Sohn GmbH
Ziegelei 1
D-72336 Balingen
E-Mail: info@kern-sohn.com
Operating instruction
Pallet truck scale
KERN VHB/VHS
Version 1.2
11/2010
GB
Tel: +49-[0]7433- 9933-0
Fax: +49-[0]7433-9933-149
Internet: www.kern-sohn.com
VHB/VHS-BA-e-1012
GB
KERN VHB/VHS
Version 1.2 11/2010
Operating instruction
Pallet truck scale
Table of Contents
1 TECHNICAL DATA............................................................................................. 3
2 DECLARATION OF CONFORMITY ................................................................... 4
3 BASIC INSTRUCTIONS FOR SCALES ............................................................. 5
3.1 Proper use................................................................................................................................. 5
3.2 Improper Use ............................................................................................................................ 5
3.3 Warranty .................................................................................................................................... 5
3.4 Monitoring of Test Resources................................................................................................. 6
4 BASIC SAFETY INSTRUCTIONS FOR SCALES .............................................. 6
4.1 Pay attention to the instructions in the Operation Manual .................................................. 6
4.2 Personnel training.................................................................................................................... 6
5 TRANSPORT AND STORAGE........................................................................... 6
5.1 Testing upon acceptance ........................................................................................................ 6
5.2 Packaging.................................................................................................................................. 6
6 UNPACKING, SETUP AND COMMISSIONING ................................................. 7
6.1 Site of installation, place of operation for scales ................................................................. 7
6.2 Scope of delivery...................................................................................................................... 8
6.3 Battery operation...................................................................................................................... 8
6.4 Commissioning......................................................................................................................... 8
6.5 Overview of display.................................................................................................................. 9
6.6 Keyboard overview................................................................................................................. 10
7 FUNCTIONS OF DISPLAY UNIT...................................................................... 11
7.1 Prior to weighing: ZERO-POINT CHECK.............................................................................. 11
7.2 Gross weighing ...................................................................................................................... 11
7.3 Net weighing: TARING BY PRESSING A BUTTON ............................................................. 11
7.4 Net weighing: MANUAL TARE INPUT .................................................................................. 11
7.5 Addition of individual weighings .......................................................................................... 13
8 SERVICE, MAINTENANCE, DISPOSAL .......................................................... 16
8.1 Cleaning .................................................................................................................................. 16
8.2 Service, maintenance............................................................................................................. 16
8.3 Disposal................................................................................................................................... 16
9 INSTANT HELP ................................................................................................ 17
2
VHB/VHS-BA-e-1012
1 Technical data
KERN VHB 2T1 VHB 2T1
Readability (d) 1 kg 1 kg
Weighing range (max) 2000 kg 2000 kg
Reproducibility 1 kg 1 kg
Linearity ± 2 kg ± 2 kg
Stabilization time 3 sec. 3 sec.
Allowable ambient
temperature
Humidity of air max. 95 % (not condensing) max. 95 % (not condensing)
Weighing Units kg, lb kg, lb
Electric Supply 4 x 1.5V AA batteries 4 x 1.5V AA batteries
Operating time 80 h/approx.1700 weightings
Auto Off 3 min 3 min
Net weight 125 kg 125 kg
Dimensions:
-10° C .... + 40° C -10° C .... + 40° C
35 h/approx.700 weightings
with print function
80 h/approx.1700 weightings
without print function
VHB/VHS-BA-e-1012
3
2 Declaration of conformity
KERN & Sohn GmbH
D-72322 Balingen-Frommern
Postbox 4052
email: info@kern-sohn.de
Phone: 0049-[0]7433- 9933-0
Fax: 0049-[0]7433-9933-149
Internet: www.kern-sohn.de
Declaration of conformity
EC-Konformitätserklärung EC-Declaration of -Conformity
Déclaration de conformité EC-Declaración de Conformidad
ECEC-Dichiarazione di conformità EC-Conformiteitverklaring
EC- Declaração de conformidade EC- Prohlášení o shode
EC-Deklaracja zgodności EC-Заявление о соответствии
D
GB
CZ
E
F
I
NL
P
PL
RUS
Konformitätserklärung
Declaration of
conformity
Prohlášení o
shode
Declaración de
conformidad
Déclaration de
conformité
Dichiarazione di
conformitá
Conformiteitverklaring
Declaração de
conformidade
Deklaracja
zgodności
Заявление о
соответствии
Electronic Scale: KERN VHB, VHE, VHS, VHT, VHM_M
Mark applied EU Directive Standards
2004/108/EC EN 55022:1994 / A1: 1995 / A2: 1997 Class A
2006/95/EC EN 60950 : 1992 / A1: 1993 / A3: 1995 / A4: 1997 / A11: 1997
Wir erklären hiermit, dass das Produkt, auf das sich diese Erklärung bezieht,
mit den nachstehenden Normen übereinstimmt.
We hereby declare that the product to which this declaration refers conforms
with the following standards.
Tímto prohlašujeme, že výrobek, kterého se toto prohlášení týká, je v souladu
s níže uvedenými normami.
Manifestamos en la presente que el producto al que se refiere esta
declaración está de acuerdo con las normas siguientes
Nous déclarons avec cela responsabilité que le produit, auquel se rapporte la
présente déclaration, est conforme aux normes citées ci-après.
Dichiariamo con ciò che il prodotto al quale la presente dichiarazione si
riferisce è conforme alle norme di seguito citate.
Wij verklaren hiermede dat het product, waarop deze verklaring betrekking
heeft, met de hierna vermelde normen overeenstemt.
Declaramos por meio da presente que o produto no qual se refere esta
declaração, corresponde às normas seguintes.
Niniejszym oświadczamy, że produkt, którego niniejsze oświadczenie
dotyczy, jest zgodny z poniższymi normami.
Мы заявляем, что продукт, к которому относится данная декларация,
соответствует перечисленным ниже нормам.
EN 50082-1: 1992
EN 61000-3-2: 1995 / A1: 1998 / A2:1998
EN 61000-3-3: 1995
Date: 14.01.2010 Signature:
Gottl. KERN & Sohn GmbH, Ziegelei 1, D-72336 Balingen, Tel. +49-[0]7433/9933-0,Fax +49-[0]7433/9933-149
4
Gottl. KERN & Sohn GmbH
Management
VHB/VHS-BA-e-1012
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
VHB/VHS-BA-e-1012
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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.
6
VHB/VHS-BA-e-1012
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 offcentre. 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.
VHB/VHS-BA-e-1012
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6.2 Scope of delivery
Standard accessory:
• Pallet truck scale
• 4 x 1.5V AA batteries
• Operating Manual
• Paper roll (KERN VHS)
6.3 Battery operation
Cover battery compartment
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
ON/ OFF
To activate the weighing system, press the
UNIT
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.
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VHB/VHS-BA-e-1012
6.5 Overview of display Example: KERN VHB
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
PRETARE
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.
VHB/VHS-BA-e-1012
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6.6 Keyboard overview
Each key provides an operating as well as an input function.
Operating function
TA R E
PRE-
TARE
TOTAL
KERN VHB
KERN VHS
ON/ OFF
UNIT
Zero setting and
automatic tare
Input of tare
Adding
Adding
Printing
On / Off
Confirm and enter numeric
values. Shifts the flashing digits
to the left
Entering numeric values:
Decreases the numeric value of
flashing digit by 1.
Entering numeric values:
Increases the numeric value of
flashing digit by 1.
Entering numeric values:
Increases the numeric value of
flashing digit by 1.
Delete
IMPORTANT
The actuation of a key will only be accepted if the load is stable and the message
“load stable” is lit up. The display unit only carries out functions as long as the load is
stable.
WARNING
If the weighed weight exceeds the set maximum, the display will show: “ERRO2”. To
prevent damage to the display unit or the weighing cells, please lighten the load of
the weighing system instantly.
SLANT
The verifiable model of the weighing system will display stripes only if a slant
exceeds 2°. If this is the case, place the weighing system on an even base.
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VHB/VHS-BA-e-1012
7 Functions of display unit
7.1 Prior to weighing: ZERO-POINT CHECK
Prior to each weighing process ensure that the system is unloaded and clear of
obstructions. The display unit provides automatic zero adjustment. This means, that
small deviations from the zero-point are corrected automatically. If the display unit
does not correct the zero-point automatically you will have to carry out a manual
correction with the help of the
7.2 Gross weighing
After the load was lifted, the display shows the gross value of the weighed weight.
7.3 Net weighing: TARING BY PRESSING A BUTTON
The display unit offers an option that allows tare weights to be reset to zero by
pressing a button. In this way net weight changes can be traced. After taring, the
display unit will once again start at the smallest display step.
¾ Lift the load.
¾ Press
The display unit shows zero.
The lit up display “NET“, indicates that a tare weight is active.
TARE
button
TARE
key.
¾ Loading and unloading the net load.
The net value for the weighed weight is shown on the display.
For unloading this will be a negative value.
¾ The system reverts to standard weighing mode when a zero adjustment is carried
out in an unloaded state.
7.4 Net weighing: MANUAL TARE INPUT
You may enter the tare weight at any time, that is, regardless whether the scales are
in a loaded or unloaded state. To achieve higher accuracy, a tare weight with a
higher resolution may be entered, regardless of the size of the weight and the display
steps of the indicator.
PRE-
¾ Press
The most recently used tare value appears.
The segment on the right is flashing.
¾ Press the
TARE
button
TARE
key for three seconds if the indicated tare value is to be used again
or
VHB/VHS-BA-e-1012
11
PRE-
¾ Press
¾ Press the numeric
TARE
button
TOTAL
up or down
PRETARE
key until the flashing number has reached
the desired value.
¾ To move to the next segment, press the key
¾ Repeat this action until the display shows the desired tare value.
TARE
¾ To activate the tare weight (but not for storing): Press the
TARE
key for three
seconds, to confirm the value.
The tare weight is now activated.
“NET” appears.
If the system is loaded at this moment, the net value of the weighed weight
appears on the display.
If the system is unloaded, the system indicates the entered tare value negative.
The entered value remains active until the weighing system is turned off, a new
tare weight entered, a new load tared (See 7.3.) or if a reset to zero is carried
out:
PRE-
¾ The weighing system is loaded: Press the
TARE
key for two seconds. The tare
value will be reset to zero and the system reverts to standard weighing mode.
or
¾ The weighing system is unloaded: Press
TARE
button A reset to zero is
carried out and the system reverts to standard weighing mode.
¾ To activate and store the tare weight: Confirm all segments by pressing the
key.
The tare weight is now activated and stored.
“NET” appears.
If the system is loaded at this moment, the net value of the weighed weight
appears on the display.
If the system is unloaded, the entered tare value is shown negative.
The entered value remains active even after the system was turned off, until a
new tare weight is entered, a new load tared (See 7.3.) or a reset to zero is
carried out.
PRE-
¾ The weighing system is loaded: Press the
TARE
key for two seconds. The tare
value will be reset to zero and the system reverts to standard weighing mode.
or
¾ The weighing system is unloaded: Press button. A reset to zero is carried
out and the system reverts to standard weighing mode.
TARE
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VHB/VHS-BA-e-1012
7.5 Addition of individual weighings
The display unit offers an option that allows the addition of weighings and the display
of the total weight. When the tare weight is active, the net weight is automatically
added up.
¾ Loading the system with the load to be added
¾ To add the weighed weight to the memory, press the
The displayed value is stored and simultaneously added to the summation
TOTAL
key.
memory.
The display alternately shows consecutive numbers (number of weighings) and
the total value (summation memory).
If the weighing system has been equipped with a printer, the value shown is
printed at the same time (KERN VHS).
After a few seconds the system automatically reverts to standard weighing
mode.
or
¾ To read the total weight calculated so far, press the
The display alternately shows the consecutive numbers (number of weighings)
TOTAL
key for three seconds.
and the total.
After a few seconds the system automatically reverts to standard weighing
mode.
¾ Whilst the total value is displayed, you may delete the memory by pressing the
TOTAL
key.
If the system is equipped with a printer, an overview print is made (KERN VHS)
The display shows the sequence number 00 and the initial value 0.0 kg.
The system automatically reverts to standard weighing mode.
Important:
¾ Please note that the balance must be unloaded between the individual weighing
procedures.
¾ Additional summation is also possible after the scales were turned on or off. The
stored values are kept after the scales were turned off.
VHB/VHS-BA-e-1012
13
7.6 PRINT OUT (KERN VHS)
1 2 3
1. Stop printing process
2. Paper feed, only when LED display on
3. LED, illuminated during printing
If the weighing system has been equipped with a printer, actual weighing data can be
printed out.
¾ Press the key.
A print is made. The weight is at the same time stored and added in the
memory (see 7.5).
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VHB/VHS-BA-e-1012
In the printout a gross weight is indicated with the letters “B/G” and a net weight with
the letter “N”. A keyed in tare weight will also be printed and is indicated with the
letters “PT”. The total weight is shown with the letters “TOT”.
Example printout:
01 B/G 6.8 kg
02 B/G 158.2 kg
03 N 426.5 kg
04 N 1200.0 kg
04 PT 150.0 kg
04 TOT 1791.5 kg
7.7 PAPER CHANGE (KERN VHS)
Thermal roll
Roll diameter max. 32 mm
Wide 58 mm
¾ Turn off the weighing system.
¾ Pull the lever until the cover group is released from its locking position. To avoid
damage to the lever do not use excessive force.
¾ Insert the paper roll with the loose end pointing forward at the top of the printer.
¾ Hold on to the loose end when closing the printer, so that it will be visible once the
printer is closed.
¾ To close the printer:
¾ Press on both sides of the cover group simultaneously.
Or
¾ Press on the middle of the cover group, near the paper exit.
¾ To cut the paper correctly:
¾ Pull the paper towards the tear bar from one side to the other.
VHB/VHS-BA-e-1012
15
8 Service, maintenance, disposal
8.1 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 and
wipe with a dry soft cloth.
8.2 Service, maintenance
The appliance may only be opened by trained service technicians who are authorized
by KERN.
The same maintenance guidelines apply to the chassis of the mobile weighing
system as those for simple manual pallet trucks. Experience has taught us that the
integrated weighing system continues to function even if the chassis was damaged
by overloading.
General rules:
As the steering wheels are mounted at the front, it is better to pull rather than
push the manual pallet truck.
If the lifting device is not used, the manual lever should be left in centre
position. This prolongs the life span of the seals.
To prevent damages to the electronic system and weighing cells it is
necessary that welding work on the entire weighing system is carried out
exclusively by technical specialists.
The bearings of the wheels (with the exception of polyurethane) as well as the
joints in the load roller section should be regularly cleaned and greased.
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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VHB/VHS-BA-e-1012
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 displayed weight is permanently
changing
The weighing value is obviously
wrong
Should other error messages occur, switch balance off and then on again. If the error
message remains inform manufacturer.
• The balance is not switched on.
• The batteries are empty
• Draught/air movement
• Sites with vibration.
• The weighing plate is in contact with
foreign matter.
• Electromagnetic fields / static charging
(choose different location/switch off
interfering device if possible)
• The display of the balance is not at zero
• Adjustment is no longer correct.
• Great fluctuations in temperature.
• Electromagnetic fields / static charging
(choose different location/switch off
interfering device if possible)
VHB/VHS-BA-e-1012
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