KERN & Sohn GmbH
Ziegelei 1
D-72336 Balingen
E-Mail: info@kern-sohn.com
Phone: +49-[0]7433- 9933-0
Fax: +49-[0]7433-9933-149
Internet: www.kern-sohn.com
Installation instructions weighing bridge (600 kg)
KERN KFP V20
Version 1.3
10/2013
GB
KFP V20_600-6000-IA-e-1313
GB
KERN KFP V20
Version 1.3 10/2013
Installation instructions weighing bridge (600 kg)
Contents
1 General ........................................................................................................... 3
2 Technical data ................................................................................................ 3
3 Basic Information (General) .......................................................................... 4
3.1 Documentation ........................................................................................................................... 4
3.2 Proper use .................................................................................................................................. 4
3.3 Improper Use .............................................................................................................................. 4
3.4 Warranty ..................................................................................................................................... 4
3.5 Monitoring of Test Resources .................................................................................................... 5
4 Basic Safety Precautions .............................................................................. 5
4.1 Pay attention to the instructions in the Operation Manual.......................................................... 5
4.2 Personnel training ....................................................................................................................... 5
5 Transport and storage ................................................................................... 5
5.1 Testing upon acceptance ........................................................................................................... 5
5.2 Packaging / return transport ....................................................................................................... 5
6 Unpacking, Setup and Commissioning ....................................................... 6
6.1 Installation Site, Location of Use ................................................................................................ 6
6.2 Unpacking, Scope of delivery ..................................................................................................... 7
6.3 Assembly, levelling ..................................................................................................................... 9
6.4 Connecting a display unit ......................................................................................................... 11
7 Operation ...................................................................................................... 11
7.1 Operation limits ......................................................................................................................... 12
7.2 Operation with access ramps ................................................................................................... 12
7.3 Load/unload weighing system .................................................................................................. 12
8 Service, maintenance, disposal .................................................................. 13
8.1 Daily check ............................................................................................................................... 13
8.2 Cleaning ................................................................................................................................... 13
8.3 Service, maintenance ............................................................................................................... 13
8.4 Disposal .................................................................................................................................... 13
8.5 Instant help ............................................................................................................................... 14
9 Service documentation ............................................................................... 15
9.1 Overview, setting regulation, tolerances .................................................................................. 15
9.2 Check and adjustment of the corner load................................................................................. 17
10 Preload, Deadload and Overload settings ................................................. 19
2 KFP V20_600-6000-IA-e-1313
1 General
Model
Weighing
range
Max
Readabil
ity d
Verificati
on value
e
Minimum
load
Min
Preload
additive
Cable
length
approx.
Net
weight
approx.
kg g g
kg
kg m kg
KFP 600V20SM
600
200
200
4
120
5
110
KFP 600V20M
600
200
200
4
120
5
170
KFP 1500V20SM
1500
500
500
10
300
5
110
KFP 1500V20M
1500
500
500
10
300
5
170
KFP 3000V20M
3000
1000
1000
20
500
5
170
KFP 3000V20LM
3000
1000
1000
20
500
5
195
KFP 6000V20M
6000
2000
2000
40
1000
5
208
These installation instruction contain all data necessary for placing and
commissioning the following weighing bridges:
KERN KFP 600V20SM
KERN KFP 600V20M
KERN KFP 1500V20SM
KERN KFP 1500V20M
KERN KFP 3000V20M
KERN KFP 3000V20LM
KERN KFP 6000V20M
2 Technical data
KFP V20_600-6000-IA-e-1313 3
3 Basic Information (General)
3.1 Documentation
These installation instruction contain all data necessary for placing and
commissioning the weighing bridges KERN KFP V20.
In combination with a display unit, described below as weighing system, for operation
configuration, please refer to the operating instructions of the display unit.
3.2 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 balcance”, 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.
3.3 Improper Use
Do not leave permanent load on the weighing bridge. This may damage the
measuring system.
Impacts and overloading exceeding the stated maximum load (max) of the weighing
system, minus a possibly existing tare load, must be strictly avoided. The weighing
system could be damaged.
Never operate in an explosive environment. The serial version is not explosion
protected.
Changes to the weighing system's design are not permitted. This may lead to
incorrect weighing results, safety-related faults and destruction of the balance.
The weighing system unit may only be operated in accordance with the described
default settings. Other areas of use must be released by KERN in writing.
3.4 Warranty
Warranty claims shall be voided in case
Our conditions in the operation manual are ignored
The appliance is used outside the described uses
Structural changes of the device
Mechanical damage and damage caused by media, liquids
Natural wear and tear
The appliance is improperly set up or incorrectly electrically connected
Overload of the measuring system
4 KFP V20_600-6000-IA-e-1313
3.5 Monitoring of Test Resources
Carefully read this operation manual before setup and commissioning,
even if you are already familiar with KERN balances.
Keep all parts of the original packaging for a possibly
required return.
Only use original packaging for returning.
Prior to dispatch disconnect all cables and remove
loose/mobile parts.
Reattach possibly supplied transport securing devices.
Secure all parts against shifting and damage.
In the framework of quality assurance the measuring-related properties of the
weighing system 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 weighing system test substances and the test weights required
for this. In KERN's accredited DKD calibration laboratory test weights and weighing
systems may be calibrated (return to the national standard) fast and at moderate
cost.
4 Basic Safety Precautions
4.1 Pay attention to the instructions in the Operation Manual
4.2 Personnel training
The appliance may only be operated and maintained by trained personnel.
The installation of a display unit must only be carried out by a well acquainted
specialist with the workings of weighing balances.
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 / return transport
KFP V20_600-6000-IA-e-1313 5
6 Unpacking, Setup and Commissioning
6.1 Installation Site, Location of Use
The weighing bridges 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 weighing
system.
On the installation site observe the following:
Place the weighing system on a firm, level surface.
The floor at the installation site must be able to carry safely the weight of the
maximally loaded weighing bridge at the resting points. At the same time it
should be sufficiently stable, that no vibrations may occur during weighing
work.
In the installation site possibly no vibrations, e.g. by neighbouring machines
should occur.
Do not use the weighing system in an explosive environment.
Avoid extreme heat as well as temperature fluctuation caused by installing
next to a radiator or in the direct sunlight.
Protect the weighing system against direct draughts e.g. due to open windows
and doors.
Use weighing system only in dry environment, protect it 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.
Avoid jarring during weighing.
Avoid static charge of goods to be weighed or weighing container.
Keep away chemicals (such as liquids or gasses), which could attack and
damage the balance inside or from outside.
Keep IP protection of the device.
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 KFP V20_600-6000-IA-e-1313
6.2 Unpacking, Scope of delivery
CAUTION
+ Danger for the back!
The weighing bridge is relatively heavy. Always use a suitable
lifting device to lift it out of the packaging or to transport it to
the required installation site.
+ Do not step under the suspended load, risk of injury!
Eye bolts
Covering weighing cell feet
Adjustable weighing cell feet
Covering Junction-Box
1. Remove outer packaging and packaging material.
2. Remove covers and .
3. Assemble eye bolts
4. Lift the weighing bridge equally off the packaging material, see caution note.
Secure the weighing bridge that it cannot fall down when it is lifted.
5. Ensure that the contents of package is complete.
KFP V20_600-6000-IA-e-1313 7
Scope of delivery:
According to the version, for assembling the weighing bridge the following accessories
(optional) must be available:
(A) 2 access ramps
or
(B) 1 access ramp and 1 foot plate set
or
(C) 2 foot plate sets
Weighing bridge with assembled connection cable
4 weighing cell feet
2 eye bolts
Operating instructions
8 KFP V20_600-6000-IA-e-1313
6.3 Assembly, levelling
+ The weighing bridge must be aligned with the help of a
water level.
+ All setting feet must rest equally.
Verified weighing systems:
In case of verified weighing systems the weighing bridge must be
firmly fixed on the floor. This is essential for the reproducibility of
the measuring results. Optionally using two access ramps or two
pairs of foot plates or a combination of both.
Accurate weighing results require a weighing bridge with perfect horizontal
alignment. During initial installation and after each change of work area it is
necessary to level the weighing bridge.
Placing the weighing bridge:
1. Prior to the final placing, install the four weighing cell feet.
2. Place the weighing bridge equally on the installation site and check if it is in an
even position and all four feet are in contact with the floor. Level the weighing
bridge by turning the weighing cell feet. For this purpose use an external levelling
appliance, e.g. a water level.
3. Remove the eye bolts, re-assemble the covers of the eye bolts and weighing cell
feet.
4. Ensure that the connecting cable is not damaged or squeezed during lifting and
placing.
Placing the weighing bridge with access ramps and/or foot plates:
Prior to step 2 (see Placing the weighing bridge) mark and fix the position of the
ramps or the foot plates.
Place the weighing bridge equally on the installation site. In the area of the
installation site of the weighing bridge, especially in the area of the weighing cell
feet, observe the evenness and the horizontal alignment of the foot plates and
ramps. Compensate minor height differences with the help of the adjustable
weighing cell feet. For this purpose use an external levelling appliance, e.g. a
water level.
Remove the eye bolts, re-assemble the covers of the eye bolts and weighing cell
feet.
Ensure that the connecting cable is not damaged or squeezed during lifting and
placing.
KFP V20_600-6000-IA-e-1313 9
Installation of the weighing bridge in pits for barrier-free access
Order the suitable pit frame as accessory.
Assembly see installation instructions of the pit frame.
10 KFP V20_600-6000-IA-e-1313
6.4 Connecting a display unit
terminal
Color
State
EXC+ [IN+]
red
voltage +
SIG + [OUT+]
green
signal +
SIG -[OUT-]
white
signal -
EXC -[IN- ]
black
voltage -
So a continuous optimal performance is guaranteed:
Avoid falling load, shock loads and impacts from the side!
For weighing operation, all objects must be placed
centrically of the weighing bridge and may not hang over
the edges or the ramps.
Check adjustment at regular intervals.
Attention
Put the connecting cable to the display unit in a manner that it is protected against
damage.
Description of the connection cable:
7 Operation
Information about
Network connection (power is supplied via the connecting cable of the
display unit)
Initial Commissioning
Connection of peripheral devices
Adjustment, linearization and verification (only the complete balance is
verifiable, i.e. weighing bridge in conjunction with a suitable display unit)
and the correct operation you will in the operating instructions included in the scope
of delivery of the display unit.
KFP V20_600-6000-IA-e-1313 11
7.1 Operation limits
Weighing ranges
600kg
1500kg
3000kg
6000kg
With centrical load
3000kg
4500kg
4500kg
9000kg
With side stress
2000kg
3000kg
3000kg
6000kg
With one-sided loading
1000kg
1500kg
1500kg
3000kg
With single-wheel load
400kg
800kg
800kg
800kg
The weighing bridges are designed extremely robust. However the load limits
according to the following table should not be exceeded!
Depending on the type of load receptacle, the static carrying capacity, i.e. the
maximum admissible load is:
7.2 Operation with access ramps
The load plate of the weighing bridge is an active weighing element, the access
ramps are passive, i.e. during the weighing process all wheels of the conveying
vehicles must rest on the load plate.
The air gap between the load plate and the access ramps must be free. Especially
for weighing of grainy or small-piece weighing goods, the gap should be controlled
regularly and kept clear.
7.3 Load/unload weighing system
Place the load on the scales using a lifting truck, a crane or a forklift truck. Ensure
that the load is not swinging when it is placed onto the scales.
Lift the load first vertically at least 10 cm above the scales before it is removed or
newly placed.
12 KFP V20_600-6000-IA-e-1313
8 Service, maintenance, disposal
Before any maintenance, cleaning and repair work disconnect the
appliance from the operating voltage.
8.1 Daily check
Ensure that all four feet are in contact with the floor.
Ensure that the connecting cable to the display unit and the network connection
cable of the display unit are not damaged.
Ensure that the balance is free from dirt, especially under the edges of the
balance.
8.2 Cleaning
Remove regularly corrosive substances.
Keep IP protection.
Protect weighing cells against splash water.
When using optional ramps or foot plates, keep clean the air gap at the edge of
the weighing bridge.
Wipe the surfaces with a damp cloth.
Only use common household cleaners.
Do not use water jet or high-pressure cleaner.
8.3 Service, maintenance
The appliance may only be opened by trained service technicians who are
authorized by KERN.
Ensure that the weighing system is regularly calibrated, see chap. 3.5 Testing
instruments control.
8.4 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.
KFP V20_600-6000-IA-e-1313 13
8.5 Instant help
Fault
Possible cause
The displayed weight is permanently
changing
Draught/air movement
Floor vibrations
Weighing plate has contact with other
objects.
Electromagnetic fields / static charging
(choose different location/switch off
interfering device if possible)
The weighing result is obviously
incorrect
No zero display with unloaded balance
Adjustment is no longer correct.
Great fluctuations in temperature.
Weighing bridge on an uneven surface.
Electromagnetic fields / static charging
(choose different location/switch off
interfering device if possible)
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:
Should other error messages occur, switch balance off and then on again. If the error
message remains inform manufacturer.
14 KFP V20_600-6000-IA-e-1313
9 Service documentation
This chapter is only intended for a balance specialist!
The weighing bridges are carried out in DMS sensor technology, at
every corner a DMS weighing cell is installed.
The analogue-digital transformation occurs in the display unit. Also all
the balance and country-specific data are stored there.
Capacity
600 kg
1500 kg
3000 kg
6000 kg
Readability
200 g
500 g
1000 g
1000 g
Min
4 kg
10 kg
20 kg
40 kg
Max
600 kg
1500 kg
3000 kg
6000 kg
1/3 corner load
200 kg
500 kg
1000 kg
2000kg
Tolerance
200 g
500 g
1000 g
2000g
9.1 Overview, setting regulation, tolerances
Testing and setting regulations:
KFP V20_600-6000-IA-e-1313 15
Verification data and tolerances as per OIML
-1
-0,75
-0,5
-0,25
0
0,25
0,5
0,75
1
0 500 1000 1500
[kg]
[g]
-2
-1,5
-1
-0,5
0
0,5
1
1,5
2
0 1000 2000 3000
[kg]
[g]
-0,4
-0,3
-0,2
-0,1
0
0,1
0,2
0,3
0,4
0 100 200 300 400 500 600
[kg]
[g]
600kg
1500kg
3000kg
6000kg
16 KFP V20_600-6000-IA-e-1313
9.2 Check and adjustment of the corner load
Check of the corner load:
Place the test weights in the centre of the load plate
and tare.
The balance displays -0-.
Place the test weights successively on all four
corners.
Now the deviations are displayed with sign, write
down the values. If there are deviations out of the
tolerances (see chap. 9.1), an adjustment will be
necessary.
Adjustment of corner load:
Preparation:
For a better control of the modifications which occur
during adjustment, select in the configuration menu
the highest readability for control purposes.
Open connection box
Adjustment rule:
The corner (weighing cell) with the biggest negative
deviation must be set to zero. Do not re-adjust this corner
even after several adjustment sequences.
KFP V20_600-6000-IA-e-1313 17
Adjustment on the analogue print
Adjustment of weighing cell J2 takes place at the potentiometer VR1 and VR2.
Adjustment of weighing cell J3 takes place at the potentiometer VR3 and VR4.
Adjustment of weighing cell J4 takes place at the potentiometer VR5 and VR6.
Adjustment of weighing cell J5 takes place at the potentiometer VR7 and VR8.
Increase the value turning to the right, reduce the value turning to the left.
18 KFP V20_600-6000-IA-e-1313
Kern model
max. Preload* (kg)
* = additional initial load
Deadload** (kg)
**= already applied
preload
Center Overload
Protection circa
(kg)
Corner Overload
Protection circa
(kg)
Loadcell
Capacity (kg)
KFP 600V20SM
0
100kg
1500 kg
500kg
500kg
KFP 600V20M
0
160kg
1500 kg
500kg
500kg
KFP 1500V20SM
0
100kg
3000 kg
1000kg
1000kg
KFP 1500V20M
0
160kg
3000 kg
1000kg
1000kg
KFP 3000V20M
0
160kg
4500 kg
1500kg
1500kg
KFP 3000V20LM
0
160kg
4500 kg
1500kg
1500kg
KFP 6000V20M
0
160kg
9000 kg
3000kg
3000kg
Platform type
Platform dimension
(mm)
Loadcell
TC
Class
Max
E
max
E
min
Y
n
Dead-load
T
min
T
max
Cable-
Type
No.
Preload
-1
-4 -3
(kg)
-5 -6
length
(kg)
(kg)
(g)
(m)
KFP 600V20SM
1000x1000x80
H8C
D09-03.19R2
C3
0
500kg
0
15000
3000
100kg
-10
40
5
KFP 600V20M
1500x1250x80
H8C
D09-03.19R2
C3
0
500kg
0
15000
3000
160kg
-10
40 5 KFP 1500V20SM
1000x1000x80
H8C
D09-03.19R2
C3
0
1000kg
0
15000
3000
100kg
-10
40
5
KFP 1500V20M
1500x1250x80
H8C
D09-03.19R2
C3
0
1000kg
0
15000
3000
160kg
-10
40
5
KFP 3000V20M
1500x1250x80
H8C
D09-03.19R2
C3
0
1500kg
0
15000
3000
160kg
-10
40 5 KFP 3000V20LM
1500x1500x80
H8C
D09-03.19R2
C3
0
1500kg
0
15000
3000
160kg
-10
40
5
KFP 6000V20M
1500x1500x100
SQB
TC6911
C 0 3000kg
0
10000
3000
160kg
-10
40
5
10 Preload, Deadload and Overload settings
19 KFP V20_600-6000-IA-e-1313
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