KERN KFP-V20NM User manual

KERN & Sohn GmbH
Ziegelei 1
D-72336 Balingen
E-Mail: [e-mail]
Phone: +49-[0]7433- 9933-0
Fax: +49-[0]7433-9933-149
Internet: www.kern-sohn.com
Installation instructions floor scale
KERN KFP_V20NM
Version 1.1
12/2015
GB
KFP V20NM-IA-e-1511

2 KFP V20NM-IA-e-1511
GB
KERN KFP_V20NM
Version 1.1 12/2015
Ins tallation ins tructions floor scale
Contents
1General ........................................................................................................... 3
2Technical data................................................................................................ 3
3Basic 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
4Basic Safety Precautions.............................................................................. 5
4.1 Pay attention to the instructions in the Operation Manual.......................................................... 5
4.2 Personnel training....................................................................................................................... 5
5Transport and storage................................................................................... 5
5.1 Testing upon acceptance ........................................................................................................... 5
5.2 Packaging / return transport....................................................................................................... 5
6Unpacking, 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 ......................................................................................................... 10
7Operation...................................................................................................... 10
7.1 Operation limits......................................................................................................................... 11
7.2 Operation with access ramps................................................................................................... 11
7.3 Load/unload weighing system.................................................................................................. 11
8Service, maintenance, disposal.................................................................. 12
8.1 Daily check ............................................................................................................................... 12
8.2 Cleaning ................................................................................................................................... 12
8.3 Service, maintenance............................................................................................................... 12
8.4 Disposal.................................................................................................................................... 12
8.5 Instant help............................................................................................................................... 13
9Service documentation ............................................................................... 14
9.1 Overview, setting regulation, tolerances .................................................................................. 14
9.2 Check and adjustment of the corner load................................................................................. 16
10 Deadload and Overload settings................................................................ 18

KFP V20NM-IA-e-1511 3
1 General
These installation instruction contain all data necessary for placing and
commissioning the following weighing bridges:
KERN KFP 600V20SNM
KERN KFP 600V20NM
KERN KFP 1500V20SNM
KERN KFP 1500V20NM
KERN KFP 3000V20NM
KERN KFP 3000V20LNM
2 Technical data
Model Weighing
range
Max
Readability
d Verification
value
e
Minimum
load
Min
Cable
length
approx.
Net weight
approx.
kg
g
g
kg
m
kg
KFP 600V20SNM 600 200 200 4 5 105
KFP 600V20NM 600 200 200 4 5 135
KFP 1500V20SNM 1500 500 500 10 5 105
KFP 1500V20NM 1500 500 500 10 5 135
KFP 3000V20NM 3000 1000 1000 20 5 135
KFP 3000V20LNM 3000 1000 1000 20 5 151

4 KFP V20NM-IA-e-1511
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

KFP V20NM-IA-e-1511 5
3.5 Monitoring of Test Resources
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
Carefully read this operation manual before setup and commissioning,
even if you are already famili
ar with KERN balances.
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
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.

6 KFP V20NM-IA-e-1511
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.

KFP V20NM-IA-e-1511 7
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!
•Floor scale
•Weighing cell feet
•User manual
1. Remove outer packaging and packaging material.
2. Remove covers.
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.

8 KFP V20NM-IA-e-1511
Scope of delivery:
•Weighing bridge with assembled connection cable
•4 weighing cell feet
•2 eye bolts
•Operating instructions
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

KFP V20NM-IA-e-1511 9
6.3 Assembly, levelling
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.
+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.

10 KFP V20NM-IA-e-1511
6.4 Connecting a display unit
Attention
Put the connecting cable to the display unit in a manner that it is protected against
damage.
Description of the connection cable:
terminal Color State
EXC+ [IN+] red voltage +
SIG + [OUT+] blue signal +
SIG -[OUT-] green signal -
EXC -[IN- ] yellow voltage -
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.
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.

KFP V20NM-IA-e-1511 11
7.1 Operation limits
•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:
Weighing ranges 600kg 1500kg 3000kg 6000kg
With centrical load 900kg 2250kg 4500kg 9000kg
With side stress 600kg 1500kg 3000kg 6000kg
With one-sided loading 300kg 750kg 1500kg 3000kg
With single-wheel load 600kg 1500kg 3000kg 6000kg
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 V20NM-IA-e-1511
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 V20NM-IA-e-1511 13
8.5 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 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)
Should other error messages occur, switch balance off and then on again. If the error
message remains inform manufacturer.

14 KFP V20NM-IA-e-1511
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.
9.1Overview, setting regulation, tolerances
Testing and setting regulations:
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

KFP V20NM-IA-e-1511 15
Verification data and tolerances as per OIML
-1
-0,75
-0,5
-0,25
0
0,25
0,5
0,75
1
0500 1000 1500
[kg]
[g]
-2
-1,5
-1
-0,5
0
0,5
1
1,5
2
01000 2000 3000
[kg]
[g]
-0,4
-0,3
-0,2
-0,1
0
0,1
0,2
0,3
0,4
0100 200 300 400 500 600
[kg]
[g]
600kg
1500kg
3000kg
6000kg

16 KFP V20NM-IA-e-1511
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 V20NM-IA-e-1511 17
Adjustment on the analogue print
Adjustment of weighing cell J2 takes place at the potentiometer VR1.
Adjustment of weighing cell J3 takes place at the potentiometer VR2.
Adjustment of weighing cell J4 takes place at the potentiometer VR3.
Adjustment of weighing cell J5 takes place at the potentiometer VR4.
Increase the value turning to the right, reduce the value turning to the left.

18 KFP V20NM-IA-e-1511
10 Deadload and Overload settings
Kern model
max. Preload* (kg)
* = additional initial load Center Overload
Protection circa (kg) Corner Overload Protection circa (kg) Loadcell Capacity (kg)
KFP 600V20SNM
90
NA
N/A
500kg
KFP 600V20NM
120
NA
N/A
500kg
KFP 1500V20SNM
90
NA
N/A
1000kg
KFP 1500V20NM
120
NA
N/A
1000kg
KFP 3000V20NM
120
NA
N/A
1500kg
KFP 3000V20LNM
150
NA
N/A
1500kg
Platform type Platform
dimension (mm)
Loadcell
TC
Class
Emax
Emin
Y
n
Dead-load
Tmin
Tmax
Cable-
Type
No.
-1
-4
-3
(kg)
-5 -6
length
(kg)
(g)
(m)
KFP 600V20SNM
1000x1000x80 CZL-8C-0.5T D09-03.19 C3 500 0 10000 3000
90kg
-10 40 5
KFP 600V20NM
1500x1250x80 CZL-8C-0.5T D09-03.19 C3 500 0 10000 3000
120kg
-10 40 5
KFP 1500V20SNM
1000x1000x80
CZL-8C-1T
D09-03.19
C3
1000
0
10000
3000
90kg
-10
40
5
KFP 1500V20NM
1500x1250x80 CZL-8C-1T D09-03.19 C3 1000 0 10000 3000
120kg
-10 40 5
KFP 3000V20NM
1500x1250x80 CZL-8C-1.5T D09-03.19 C3 1500 0 10000 3000
120kg
-10 40 5
KFP 3000V20LNM
1500x1500x80
CZL-8C-1.5T
D09-03.19
C3
1500
0
10000
3000
150kg
-10
40
5

KFP 1500V20SNM
KFP 600V20SNM
870 870
1000
860
1000
92
860
85
12
13
7
4
5
6
3
2
1
10
14
9
15
16
11
8

KFP 1500V20NM
KFP 600V20NM
125012501250125012501250125012501250
1360
1120
92
85
1
2
4
3
13
10
7
6
5
8
15
14
9
16
16
11
12