KERN & Sohn GmbH
Ziegelei 1
D-72336 Balingen
email: info@kern-sohn.com
Operating instructions
Pallet truck scales
KERN VHM_M
Version 1.2
07/2010
GB
Phone: +49-[0]7433- 9933-0
Fax: +49-[0]7433-9933-149
Internet: www.kern-sohn.com
VHM_M-BA-e-1012
GB
KERN VHM_M
Version 1.2 07/2010
Table of Contents
1 Technical Data ................................................................................................... 3
2 Declaration of conformity ................................................................................. 5
3 Basic 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
4 Basic safety instructions for scales ................................................................ 7
4.1 Pay attention to the instructions in the Operation Manual ......................................................... 7
4.2 Personnel training ...................................................................................................................... 7
5 Transportation & Storage ................................................................................. 7
5.1 Testing upon acceptance ........................................................................................................... 7
5.2 Packaging / return transport ....................................................................................................... 7
6 Unpacking, Setup and Commissioning ........................................................... 7
6.1 Site of installation, place of operation for scales ........................................................................ 7
6.2 Scope of supply .......................................................................................................................... 9
6.3 Rechargeable battery operation................................................................................................. 9
6.4 Commissioning ........................................................................................................................... 9
Operating instructions Pallet truck scale
7 Display unit ...................................................................................................... 10
7.1 Overview of displays ................................................................................................................ 10
7.2 Keyboard overview................................................................................................................... 11
8 Adjustment....................................................................................................... 12
8.1 Zeroing ..................................................................................................................................... 12
8.2 Performance of adjustment ...................................................................................................... 13
9 Verification....................................................................................................... 19
10 Operation ...................................................................................................... 21
10.1 Prior to weighing: ZERO-POINT CHECK................................................................................. 21
10.2 Gross weighing......................................................................................................................... 21
10.3 Net weighing............................................................................................................................. 21
10.3.1 Taring by pressing a button ............................................................................................. 21
10.3.2 Numerical input of tare (PRE-TARE)............................................................................... 22
10.4 Addition of individual weighings ............................................................................................... 23
11 Service, maintenance, disposal.................................................................. 25
11.1 Cleaning ................................................................................................................................... 25
11.2 Service, maintenance............................................................................................................... 25
11.3 Disposal.................................................................................................................................... 25
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VHM_M-BA-e-1012
1 Technical Data
KERN VHM 2T2M
Readability (d) 2 kg
Weighing range (max) 2000 kg
Minimum load (Min) 40 kg
Verification value (e) 2 kg
Verification class III
Reproducibility 2 kg
Linearity ± 2 kg
Recommended adjustment
weight, not added (class)
Warm-up time 10 min
Allowable ambient temperature -10° C .... + 40° C
Humidity of air max. 95 %
Rechargeable battery
Auto Off 30 min
Net weight 125 kg
2 t (M1)
(not condensing)
12 V
Service life 35 h
Loading time 6 h
VHM_M-BA-e-1012
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Dimensions:
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VHM_M-BA-e-1012
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
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
German
Français
Español
Italiano
We hereby declare that the product to which this declaration refers conforms to the
following standards.
Wir erklären hiermit, dass das Produkt, auf das sich diese Erklärung bezieht, mit den
nachstehenden Normen übereinstimmt.
Nous déclarons avec cela responsabilité que le produit, auquel se rapporte la présente
déclaration, est conforme aux normes citées ci-après.
Manifestamos en la presente que el producto al que se refiere esta declaración está de
acuerdo con las normas siguientes
Dichiariamo con ciò che il prodotto al quale la presente dichiarazione si riferisce è
conforme alle norme di seguito citate.
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
EN 50082-1 : 1992
EN 61000-3-2 : 1995/A1: 1998 / A2:1998
2006/95/EC EN 60950 : 1992/A1: 1993 / A3: 1995 / A4: 1997 / A11: 1997
Date: 14. Jan. 2010 Signature:
Gottl. KERN & Sohn GmbH, Ziegelei 1, D-72336 Balingen, Tel. +49-[0]7433/9933-0,Fax +49-[0]7433/9933-149
EN 61000-3-3 : 1995
Gottl. KERN & Sohn GmbH
Management
VHM_M-BA-e-1012
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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 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.
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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VHM_M-BA-e-1012
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 Transportation & 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 / return transport
Ö Keep all parts of the original packaging for a possibly
required return.
Ö Only use original packaging for returning.
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.
VHM_M-BA-e-1012
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On the installation site observe the following:
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 offcenter. 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.
Because condensed water may arise in the electronic system, fast
temperature changes should be avoided. For acclimatization the balance
should be switched off in case of larger temperature differences.
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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VHM_M-BA-e-1012
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