KERN & SOHN KFS-TM User Manual
KERN & Sohn GmbH
Ziegelei 1
E-Mail: info@kern-sohn.com
Phone: +49-[0]7433- 9933-0
Internet: www.kern-sohn.com
Operating and Inst allation
Display Unit
KERN KFS-TM
Version 1.0
12/2014
Instructions
GB
D-72336 Balingen
Fax: +49-[0]7433-9933-149
KFS-TM-BA_IA-e-1410
KERN KFS-TM
Display unit
GB
Version 1.0 12/2014
Operating and installa t ion instructions
Contents
1 Technical data ................................................................................................... 4
2 Appliance overview ........................................................................................... 5
2.1 Overview of display .................................................................................................... 6
2.2 Keyboard overview .................................................................................................... 8
2.3 Audio signal ............................................................................................................... 9
3 Basic Information (Gen eral) ............................................................................. 9
3.1 Utilisation in accordance with specification. ............................................................... 9
3.2 Improper Use ............................................................................................................. 9
3.3 Warranty ...................................................................................................................10
3.4 Monitoring of Test Resources ...................................................................................10
4 Basic Safety Precauti o ns ................................................................................ 10
4.1 Pay attention to the instructions in the Operation Manual .........................................10
4.2 Personnel training .....................................................................................................10
5 Transport and storage .................................................................................... 11
5.1 Testing upon acceptance ..........................................................................................11
5.2 Packaging / return transport ......................................................................................11
6 Unpacking and placing ................................................................................... 11
6.1 Installation Site, Location of Use ...............................................................................11
6.2 Scope of delivery / standard accessories: .................................................................12
6.3 Unpacking/installation ...............................................................................................12
6.4 Mains connection ......................................................................................................14
6.5 Adjustment ................................................................................................................14
6.6 Linearization .............................................................................................................17
6.7 Verification ................................................................................................................19
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7 Operation ......................................................................................................... 21
7.1 Start-up .....................................................................................................................21
7.2 Switching Off ............................................................................................................21
7.3 Zeroing .....................................................................................................................21
7.4 Simple weighing ........................................................................................................21
7.5 Weighing with tare ....................................................................................................22
7.6 Counting ...................................................................................................................22
7.6.1 Determination of the average piece weight by weighing ................................................. 23
7.6.2 Numeric input of the average piece weight ..................................................................... 24
7.7 Totalization ...............................................................................................................25
7.7.1 Manual totalizing .............................................................................................................. 26
7.7.2 Automatic adding-up ........................................................................................................ 30
7.8 Tolerance check .......................................................................................................32
7.8.1 Tolerance check for target quantity ................................................................................. 35
7.8.2 Tolerance check for target weight.................................................................................... 37
8 Function menu ................................................................................................. 40
9 RS 232C interface ............................................................................................ 44
9.1 Technical data ..........................................................................................................44
9.2 Remote control instructions.......................................................................................45
10 Servicing, maintenance, disposal .............................................................. 46
10.1 Cleaning ...................................................................................................................46
10.2 Servicing, maintenance .............................................................................................46
10.3 Disposal ....................................................................................................................46
11 Error messages, troubleshooting guide .................................................... 47
12 Installing display unit / weighing bridge .................................................... 48
12.1 Technical data ..........................................................................................................48
12.2 Weighing system design ...........................................................................................48
12.3 Connecting a platform ...............................................................................................49
12.4 Configuring display devices ......................................................................................50
KFS-TM-BA_IA-e-1410 3
1 Technical data
KERN KFS-TM
Display 6-digit
Weighing Units g, kg
Display LCD 16.5 mm digits with back lighting
DMS weighing cells
Range calibration We recommend ≥ 50 % max.
Electric Supply
Mains adapter secondary voltage 12V, 500 mA
Housing 260 x 150 x 65
Admissible
ambient temperature
Net weight 1.5 kg
Rechargeable battery
(optional)
Operating / charge time
Table leg
incl. wall fixture
80-100 Ω. Max. 4 item per 350 Ω;
Sensitivity 2-3 mV/V
Input voltage 220 V – 240 V, 50 Hz
0°C – 40°C
40 h / 12 h
Standard
Data output RS232
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2 Appliance overview
1. Display “weight”
2. Display “average item weight“
3. Display “quantity”
4. Tolerance margin, see chap. 7.8
5. ON/OFF key
6. Tare and zero set key
7. Numeric keys
8. Function keys
9. RS-232
10. Input connection load cell cable
11. Table leg / wall unit
12. End stop table leg / tripod
13. Mains adapter connection
14. Adjustment switch
KFS-TM-BA_IA-e-1410 5
Weight display
Display average piece weight
2.1 Overview of display
Display quantity
• Weight dis play
Here the weight of your goods is displayed in [kg].
Indicator [] next to symbol displays:
TARE Net weight
a
• Display average piece weight
Here the average reference weight of a sample is displayed in [g]. This value is either
numerically entered by user or calculated by weighing on balance.
Stability display
Zeroing display
6 KFS-TM-BA_IA-e-1410
• Display quantity
Here the current piece quantity (PCS = pieces) or in totalizing mode the sum
of the placed parts is displayed, see chapter 7.7.
Indicator [] next to symbol displays:
TOTAL Total number of pieces
+ Target quantity of items above upper tolerance limit
-
• Other displays
BUSY
LIGHT
Target quantity of items within tolerance limits
Target quantity of items below lower tolerance limit
• Power supply via line adapter
• Status display battery (optional)
• Saving / calculating weighing data
• Piece below minimum weight of piece
KFS-TM-BA_IA-e-1410 7
2.2 Keyboard overview
Button Function
Turn on/off
Taring (> 2 % Max)
Zero setting (< 2 % Max)
For entering of item weight by weighing see chap. 7.6.1
This value is saved to the weighing balance memory
For numeric entry of item weight see chap. 7.6.2
….
Reference optimisation
Set / call limits for tolerance control
Addition in sum memory
Exit menu, return to weighing mode
Call up total
Calculate weighing data via interface
Call function menu
Confirm selection in menu
Numeric keys
Decimal point
Delete key
Arrow keys for navigating around menu and for setting a
decimal place in numeric entries.
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2.3 Audio signal
1 x briefly Confirm by pressing key
1 x longer Saving was successful
2 x briefly Invalid entry
3 x briefly Missing entry
continuous
Tolerance control depending on
menu setting ”F1 Co“, see chap. 8
3 Basic Information (General)
3.1 Utilisation in accord a n ce with sp ecif ication.
The display unit acquired by you is used in combination with a weighing plate and
serves to determine the weighing value of material to be weighed. I t i s inten ded t o be
used as a “non-automatic weighing system”, i.e. the material to be weighed is
manually and carefully placed in the centre of the weighing plate. As soon as a sta ble
weighing value is reached the weighing value can be read.
3.2 Improper Use
Do not use display unit 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 display unit. (Example: Slowly
draining fluids from a container on the balance.)
Do not leave permanent load on the weighing pan. This may damage the measuring
system.
Impacts and overloading exceeding the stated maximum load (max) of the weighing
plate, minus a possibly existing tare load, must be strictly avoided. Both, the weig hing
plate and the display unit may be damaged during this process.
Never operate display unit in explosive environment. The serial version is not
explosion protected.
Changes to the display unit's design are not permitted. This may lead to incorrect
weighing results, safety-related faul ts and des tr uct ion of the display unit.
The display unit may only be operated in accordance with the described default
settings. Other areas of use must be released by KERN in writing.
KFS-TM-BA_IA-e-1410 9
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 or damage by media, liquids, natural wear and tear
• The appliance is improperly set up or incorrectly electrically connected
• The measuring system is overloaded
3.4 Monitoring of Test Resources
In the framework of quality assurance the measuring-related properties of the display
unit 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 display units’ test substances and the test weights required for this. In
KERN’s accredited DKD calibration laboratory test weights and display units 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 familiar with KERN balances.
4.2 Personnel training
The appliance may only be operated and maintained by trained personnel.
10 KFS-TM-BA_IA-e-1410
5 T ransport 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 such as the glass wind screen, the
weighing platform, power unit etc. against shifting and
damage.
6 Unpacking and placing
6.1 Installation Site, Location of Use
The display units are designed in a way that reliable weighing results are achieved in
common conditions of use.
Precise and fast work is achieved by selecting the right place for your display unit
and your weighing plate.
On the installation site observe the following:
• Place the display unit and the weighing plate on a stable, even surface.
• Avoid extreme heat as well as temperature fluctuation caused by installing
next to a radiator or in the direct sunlight;
• Protect the display unit and the weighing plate against direct draft from open
windows or doors.
• Avoid jarring during weighing;
• Protect the display unit and the weighing plate against high humidity, vapours
and dust.
• Do not expose the display unit 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 static charge of goods to be weighed or weighing container.
KFS-TM-BA_IA-e-1410 11
Wall fixture
• For display unit, see chapter 2
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 / standard accessories:
• Mains adapter
• Table leg incl. wall fixture
• Protective cover
• Operating manual
6.3 Unpacking/installation
Carefully remove the display unit from packaging, remove plastic cover and place it
in the designated work area.
Mount the display unit in a way that facilitates operation and where it is easy to see.
To be used with table leg and wall fixture
Push table leg in guide rail [11] up to end stop [12], see chap. 2.
Using with tripod (optional)
12 KFS-TM-BA_IA-e-1410
(Example of illustration)
To position the display hig her up, the display unit may be mounted on an optionally
available tripod (KERN IFB-A01/A02).
KFS-TM-BA_IA-e-1410 13
6.4 Mains connection
Power is supplied via the external mains adapter. The stated voltage value must be
the same as the local voltage.
Only use original KERN mains adapters. Using other makes requires consent by
KERN.
6.5 Adjustment
As the acceleration value due to gravity is not the same at every location on earth,
each display unit with connected weighing plate must be coordinated - in compliance
with the underlying physical weighing principle - to the existing acceleration due to
gravity at its place of location (only if the weighing system has not already been
adjusted to the location in the factory). This adjustment process must be carried out
for the first commissioning, after each change of location as well as in case of
fluctuating environment temperature. To receive accurate measuring values it is also
recommended to adjust the display unit periodically in weighing operation.
• Provide adjustment weight.
• The required adjustment wei g ht depends on the capacity of the
weighing system. Carry out adjustment as near as possible to the
scale’s maximum weight. Info about test weights can be found on the
Internet at: http://www.kern-sohn.com
• Observe stable environmental conditions. Stabilisation requires a certain
warm-up time.
14 KFS-TM-BA_IA-e-1410
Call up menu:
Switch-on balance and during the selftest press .
Ensure that there are no objects on the weighing pan.
Reset to zero if necessary by pressing .
Go to weighing mode and press and hold for approx. 5-6 seconds until
FUNC followed by F0 iSn appears. Release button.
Press repeatedly until F2 dm is displayed.
On verified weighing systems press the adjustment switch!
Press and select the set weighing scales type by .
= Single-range balance
= Dual range balance
= Multi-interval balance
Acknowledge with .
Press repeatedly until „CAL“ will be displayed.
KFS-TM-BA_IA-e-1410 15
Acknowledge by and select desired setting with .
= Linearization
= Adjustment
How to carry out adjustment:
Confirm menu setting nonLin with .
Ensure that there are no objects on the weighing pan.
LoAd will be displayed after standstill control has been carried out.
Put the required adjustment weight carefully in the centre of the weighing pan.
After successful adjustment, the weighing scales will carry out a selftest.
During this selftest remove the adjustment weight and the weighing scales will
automatically return to weighing mode.
An adjusting error or incorrect adjusting weight will be indicated by the error
message; repeat adjustment procedure.
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• Carrying out linearization is restricted to specialist staff possessing
see chapter “testing instruments control”.
MAX
LOAD 1
LOAD 2
LOAD 3
LOAD 4
3kg
0.5kg
1kg
2kg
3kg
6kg
1kg
2kg
4kg
6kg
15kg
3kg
5kg
10kg
15kg
30kg
10kg
15kg
20kg
30kg
60 kg
10kg
20kg
40kg
60kg
120 kg
30kg
60kg
60kg
150kg
300 kg
50kg
100kg
200kg
300kg
600 kg
100kg
200kg
400kg
600kg
1.5 t
3000kg
5000kg
1000kg
1500kg
3 t
5000kg
1000kg
2000kg
3000kg
6.6 Linearization
Linearity shows the greatest deviation of a weight display on the scale to the value of
the respective test weight according to plus and minus over the entire weighing
range. If linearity deviation is discovered during a monitoring of test resources, you
can improve this by means of linearization.
Tab. 1: Adjustment weights „LOAD1 – LOAD4“
well acquainted with the workings of weighing scales.
• The test weights to be used must be adapted to the weighing scale’s
specifications; see chapter “monitoring of test resources”.
• Observe stable environmental conditions. Stabilisation requires a
certain warm-up time.
• Do not remove the adjustment weight during linearization in step
LOAD 1 to LOAD 4, merely increase it instead. Conversely do not
remove the adjustment weight during step LOAD 4 to LOAD 1,
merely increase it instead.
• After successful linearisation you will have to carry out calibration;
KFS-TM-BA_IA-e-1410 17
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