KERN VHT User manual

KERN & Sohn GmbH
Ziegelei 1
D-72336 Balingen
email: [email protected]om
Phone: +49-[0]7433- 9933-0
Fax: +49-[0]7433-9933-149
Internet: www.kern-sohn.com
Operating Manual
Pallet truck scales
KERN VHT
Version 1.0
01/2009
GB
VHT-BA-e-0910

G KERN VHT
Version 1.0 01/2009
Operating instructions 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
5TRANSPORTATION & STORAGE..................................................................... 7
5.1 Testing upon acceptance ........................................................................................................ 7
5.2 Packaging.................................................................................................................................. 7
6UNPACKING, SETUP AND COMMISSIONING ................................................. 8
6.1 Site of installation, place of operation for scales ................................................................. 8
6.2 Scope of delivery...................................................................................................................... 9
6.3 Battery power supply............................................................................................................... 9
6.4 Commissioning....................................................................................................................... 10
6.5 Overview of display................................................................................................................ 10
6.6 Keyboard overview................................................................................................................. 12
7FUNCTIONS OF DISPLAY UNIT...................................................................... 13
7.1 Multiple range display............................................................................................................ 13
7.2 Prior to weighing: ZERO-POINT CHECK.............................................................................. 13
VHT-BA-e-0910
2

7.3 Gross weighing ...................................................................................................................... 13
7.4 Net weighing: TARING BY PRESSING A BUTTON ............................................................. 13
7.5 Net weighing: MANUAL TARE INPUT .................................................................................. 14
7.6 Input of the code number ...................................................................................................... 15
7.7 Parts counting ........................................................................................................................ 16
7.7.1 Piece counting by placing the parts ..................................................................................... 16
7.7.2 Piece counting by means of input piece weight................................................................... 17
7.8 Adding ..................................................................................................................................... 18
7.9 Weighing units switch-over................................................................................................... 18
7.10 PRINTING ................................................................................................................................ 19
7.11 PAPER CHANGE..................................................................................................................... 21
7.12 Change of date and time on the printout ............................................................................. 23
7.13 Set limit value ......................................................................................................................... 23
8SERVICE, MAINTENANCE, DISPOSAL .......................................................... 24
8.1 Cleaning .................................................................................................................................. 24
8.2 Service, maintenance............................................................................................................. 24
8.3 Disposal................................................................................................................................... 24
9ERROR MESSAGES ........................................................................................ 25
10 INSTANT HELP............................................................................................. 26
VHT-BA-e-0910 3

1 Technical Data
KERN VHT 2T0.2T
Readability (d) 200 g; 500 g; 1000 g
Weighing range
(max)
200 kg; 500 kg; 2000 kg;
Reproducibility 200 g; 500 g; 1000 g
Linearity 200 g; 500 g; 1000 g
Warm-up time 10 min
Allowable ambient
temperature -10° C .... + 40° C
Humidity of air max. 95 %
Weighing Units kg
Rechargeable
battery
12 V
Loading time of
battery 6 h
Auto Off 3 min
Net weight 125 kg
Dimensions:
VHT-BA-e-0910
4

2 Declaration of conformity
KERN & Sohn GmbH
D-72322 Balingen-Frommern
Postbox 4052
email: [email protected]
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
EC- Déclaration de conformité EC-Declaración de Conformidad
EC-Dichiarazione di conformità EC-Conformiteitverklaring
EC- Declaração de conformidade EC- Prohlášení o shode
EC-Deklaracja zgodności EC-Заявление осоответствии
D Konformitäts-
erklärung
Wir erklären hiermit, dass das Produkt, auf das sich diese Erklärung bezieht,
mit den nachstehenden Normen übereinstimmt.
GB Declaration of
conformity
We hereby declare that the product to which this declaration refers conforms
to the following standards.
CZ Prohlášení o
shode
Tímto prohlašujeme, že výrobek, kterého se toto prohlášení týká, je v souladu
s níže uvedenými normami.
E Declaración de
conformidad
Manifestamos en la presente que el producto al que se refiere esta
declaración está de acuerdo con las normas siguientes
F Déclaration de
conformité
Nous déclarons avec cela responsabilité que le produit, auquel se rapporte la
présente déclaration, est conforme aux normes citées ci-après.
I Dichiarazione di
conformitá
Dichiariamo con ciò che il prodotto al quale la presente dichiarazione si
riferisce è conforme alle norme di seguito citate.
NL Conformiteit-
verklaring
Wij verklaren hiermede dat het product, waarop deze verklaring betrekking
heeft, met de hierna vermelde normen overeenstemt.
P Declaração de
conformidade
Declaramos por meio da presente que o produto no qual se refere esta
declaração, corresponde às normas seguintes.
PL Deklaracja
zgodności
Niniejszym oświadczamy, że produkt, którego niniejsze oświadczenie
dotyczy, jest zgodny z poniższymi normami.
RUS Заявление о
соответствии
Мы заявляем, что продукт, ккоторому относится данная декларация,
соответствует перечисленным ниже нормам.
Electronic Scale: KERN VHB, VHE, VHS, VHT
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
EN 61000-3-3 : 1995
2006/95/EC EN 60950 : 1992/A1: 1993 / A3: 1995 / A4: 1997 / A11: 1997
Date: 24.09.2008 Signature:
Gottl. KERN & Sohn GmbH
Management
Gottl. KERN & Sohn GmbH, Ziegelei 1, D-72336 Balingen, Tel. +49-[0]7433/9933-0,Fax +49-[0]7433/9933-149
VHT-BA-e-0910 5

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 put on the weighing plate. The center of gravity of
the load should be in the middle of the 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 balance. 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
VHT-BA-e-0910
6

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
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.
VHT-BA-e-0910 7

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.
VHT-BA-e-0910
8

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.
6.2 Scope of delivery
Serial accessories:
Pallet truck scales
Operating Manual
Paper rolls
Rechargeable battery with power supply unit
6.3 Battery power supply
Battery compartment
The voltage supply takes place via an interchangeable battery module. With a full-
loaded battery module you can weigh approx. 35 hours without interruption (system
without printer).
If the loading status of the rechargeable battery is too low, the display shows:
“LO-BA”. If the battery is completely exhausted, the lifting truck switches off
automatically.
It is recommended to load the battery at least 6 hours. In that manner a loss of
battery capacity is avoided.
If the system is used in shift work or if the system has an integrated printer, it is
recommended to purchase a supplementary battery module.
The battery module is loaded using the delivered loading device. When loading, the
LED of the loading device is lighting. If that LED is off, the battery has been reloaded.
An overloading of the rechargeable battery is not possible as the loading device
switches off automatically.
VHT-BA-e-0910 9

6.4 Commissioning
To activate the weighing system, press the
ON/
UNIT
OFF
button.
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.
6.5 Overview of display
() PRE-
PRINT
TOTAL
C
ZERO
NET
Max 200 kg
d = 0.2 kg Max 500 kg
d = 0.5 kg Max 2000 kg
d = 1 kg
ON/
UNIT
OFF
pcs/kg/lb
The seven displays provide the following information:
◄The weighing system (incl. load) is stable
▬The indicated weight has a negative value
ZERO ◄the indicated weight is within the zero range
NET ◄the indicated value is the net weight
▼the indicated value is within the weighing range 1
▼the indicated value is within the weighing range 2
▼the indicated value is within the weighing range 3
VHT-BA-e-0910
10

DISPLAY- MESSAGES
The following messages may appear on the display:
Error message
Confirmation addition
Add piece quantity
Display of adjustment value
Taring carried out, dosing process
Confirmation dosing carried out
Display of parameter number
Dosing process cancelled
Display of hours setting
Display of minutes setting
Display of day setting
Display of month setting
Display of year setting
VHT-BA-e-0910 11

6.6 Keyboard overview
Each button provides two operating as well as one input function.
Key Operation function 1
(press shortly)
Operation function 2
(press longtime) Input function
Zero point correction Input code Enter
() PRE-
Taring Input tare weight
Entering numeric
values: Decreases the
numeric value of
flashing digit by 1.
PRINT
TOTAL
Print out the weight
value and add it to the
total weight
Check the subtotal and
print out the end total
Entering numeric
values: Increases the
numeric value of
flashing digit by 1.
Calculation of the
piece weight
Input of the piece
weight
Entering numeric
values: Confirms the
flashing value.
ON/
UNIT
OFF
Unit commutation On / Off Correction
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.
CAUTION
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.
VHT-BA-e-0910
12

7 Functions of display unit
7.1 Multiple range display
The size of the display steps depends on the measured weight:
from 0 to 200 kg the weight is displayed in 0.2 kg;
from 200 to 500 kg the weight is displayed in 0.5 kg;
from 500 to 2200 kg the weight is displayed in 1 kg.
Because of this weight-dependant size of the display step it is possible to weigh
smaller weights with more exactness. The display step does not change during
weighing. If e.g. a weight of 650 kg is weighed, the display step will not change to 0.5
kg, if the weighed quantity reaches 500 kg. The weight will continue to be displayed
in 1 kg-steps.
7.2 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 key.
7.3 Gross weighing
After the load was lifted, the display shows the gross value of the weighed weight.
7.4 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.
ÖLift the load.
ÖPress button
() PRE-
.
The display unit shows zero.
The lit up display “NET“, indicates that a tare weight is active.
ÖLoading 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.
ÖBy actuating the
() PRE-
button the gross weight can be read.
VHT-BA-e-0910 13

7.5 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.
ÖPress
() PRE-
button for approx. 3 seconds.
The most recently used tare value appears.
The segment on the right is flashing.
ÖPress [ ] button, if the displayed tare value will be used once more.
or:
ÖPress
() PRE-
button for approx. 3 seconds.
ÖPress the numeric up
PRINT
TOTAL
[ ] or down
() PRE-
[ ] button until the flashing number
has reached the desired value.
ÖTo move to the next segment, press the button [ ].
ÖRepeat this action until the display shows the desired tare value.
ÖTo activate the tare weight (but not for storing): Press the [ ] button for
three seconds, to confirm the value.
ÖThe tare weight is now activated.
Ö“NET” appears.
ÖIf the system is loaded at this moment, the net value of the weighed weight
appears on the display.
ÖIf the system is unloaded, the system indicates the entered tare value negative.
ÖThe entered value remains active until the weighing system is switched off or if a
zero setting is made.
VHT-BA-e-0910
14

7.6 Input of the code number
The display device offers the possibility to enter a code number of max. 5 positions.
Input of a code is a topic if the weighing system is equipped with a printer or other
additional devices in order to identify the different weighings at a later processing of
the data.
ÖPress button for approx. 3 seconds
On the display device appears the code entered as last. The right-hand cipher
flashes.
ÖPress anew the [] button, when the displayed code shall be maintained.
The code is activated and the balance returns into the weighing mode.
or:
ÖPress button
PRINT
TOTAL
[ ] or
() PRE-
[ ] in order to change the code.
On the display device appears a new code.
ÖPress [] button in order to accept the new code. The code is activated and
the balance returns into the weighing mode.
Ö
VHT-BA-e-0910 15

7.7 Parts counting
During piece counting parts can either be counted into a container or out of a
container. To count a greater number of parts the average weight per part has to be
determined with a small quantity (reference quantity).
The larger the reference quantity, the higher the counting exactness. High reference
must be selected for small parts or parts with considerably different sizes.
CAUTION
The larger the reference quantity, the more accurate the parts
counting.
ATTENTION! If the exactness during calculation is too low, the
indicator will show “ERR05”. Press any button to return to the piece
counting mode, and increase the quantity to be calculated.
7.7.1 Piece counting by placing the parts
ÖPress the button.
In the display appears e.g. „add10“. The ‘kg’ display vanishes and the ‘pcs’ display
appears.
ÖPut 10 sample parts onto the balance
ÖPress [] button
The process is finished and the quantity of parts is displayed.
or:
ÖChange the piece quantity using
PRINT
TOTAL
[ ] or
() PRE-
[ ] button.
The new piece quantity is displayed, e.g. „add50“.
ÖPlace the indicated quantity of pieces and press the [] button
The process is finished and the quantity of parts is displayed.
ÖPress
ON/
UNIT
OFF
The balance returns to the weighing mode, the weighed piece quantity now will be
deleted.
VHT-BA-e-0910
16

7.7.2 Piece counting by means of input piece weight
ÖPress the [ ] button.
In the display appears the piece weight entered as last. The right-hand cipher
flashes.
ÖPress the [] button in order to use again the displayed piece weight.
The weighed piece quantity is displayed.
or:
ÖChange the piece weight using
PRINT
TOTAL
[ ] or
() PRE-
[ ] button.
The new piece weight will be displayed.
ÖPress the [] button in order to use the new piece weight.
The weighed piece quantity is displayed.
ÖPress
ON/
UNIT
OFF
button for approx. 3 seconds.
The balance returns to the weighing mode, the weighed piece quantity now will be
deleted.
VHT-BA-e-0910 17

7.8 Adding
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.
ÖLoading the system with the load to be added
ÖTo add the weighed weight to the memory, press the
PRINT
TOTAL
button.
In the display appears shortly „AddEd“.
Then the balance returns automatically into the weighing mode.
If the balance is connected to a printer, the displayed value will be printed out.
The gross, net and tare weights are added.
or:
ÖTo read the total weight calculated so far, press the
PRINT
TOTAL
button for three seconds.
The display alternately displays for 3 seconds the consecutive numbers (number of
weighings) and the total value of the weighings in the memory.
ÖAs long as the total value is displayed, press the
PRINT
TOTAL
button for approx. 3
seconds.
The total value is printed out and at the same time the memory will be deleted.
ÖAs long as the total value is displayed, press the
ON/
UNIT
OFF
button.
The memory is deleted without printing the total value.
If during the display no button is pressed, the subtotal will remain in the memory and
the balance after approx. 60 seconds will automatically return to the weighing mode.
7.9 Weighing units switch-over
The balance has the possibility to switch over between the units kg and lb.
ÖPress button
ON/
UNIT
OFF
.
The weight of the placed sample is displayed for 5 seconds, after that the balance
returns automatically to the starting unit.
VHT-BA-e-0910
18

7.10 PRINTING
1 2 3
1. Interrupt the printing process
2. Paper forward feed, only if LED is lighting
3. LED, lights up during printing process
When the weighing system is equipped with a printer, current weighing data and
entered data can be printed out. Date and time are only printed out, if this option has
been installed.
ÖPress button.
ÖA printout will be made. The current weight is added to the addition memory
On the printout a gross weight with the letters „B/G“ and
A net weight with the letters „N“ will be indicated.
A manually entered tare weight will also be printed out and indicated by the
characters „PT“.
The total weight will be indicated by the characters „TOT“.
VHT-BA-e-0910 19

Example printout without code:
B/G 1234.5 kg
T 34.5 kg
N 1200.0 kg
No. 1
10/11/08 17:45
Example printout with code:
CODE 12345
B/G 1234.5 kg
T 34.5 kg
N 1200.0 kg
No. 1
10/11/08 17:45
Example piece counting printout without code:
B/G 1234.5 kg
T 34.5 kg
N 1200.0 kg
PcWt 1.234 kg
Qty 12345 PCs
No. 1
10/11/08 17:45
Example piece counting printout with code:
CODE 12345
B/G 1234.5 kg
T 34.5 kg
N 1200.0 kg
PcWt 1.234 kg
Qty 12345 PCs
No. 1
10/11/08 17:45
VHT-BA-e-0910
20