KERN KFC-TM User manual
KERN & Sohn GmbH
Ziegelei 1
72336 Balingen-Frommern
Germany
Operating and Installation
Instructions Display units
KERN KFC-TM
Type TKFC-TM-A
Version 1.2
2022-08
GB
KFC-TM-A-BA_IA-e-2212
2 TKFC-TM-A-BA_IA-e-2212
GB
KERN KFC-TM
Version 1.1 2022-08
Operating and installation instructions
Display units
Contents
1Technical data................................................................................................ 4
2Declaration of conformity ............................................................................. 5
3Appliance overview ....................................................................................... 6
3.1 Keyboard overview..................................................................................................................... 7
3.1.1 Numeric entry ............................................................................................................................. 8
3.1.2 Overview of displays................................................................................................................... 9
4Basic Information (General)........................................................................ 10
4.1 Proper use................................................................................................................................ 10
4.2 Improper Use............................................................................................................................ 10
4.3Warranty................................................................................................................................... 10
4.4 Monitoring of Test Resources .................................................................................................. 11
5Basic Safety Precautions............................................................................ 11
5.1 Pay attention to the instructions in the Operation Manual........................................................ 11
5.2 Personnel training..................................................................................................................... 11
6Transport and storage................................................................................. 11
6.1 Testing upon acceptance ......................................................................................................... 11
6.2 Packaging / return transport..................................................................................................... 11
7Unpacking, Installation and Commissioning............................................. 12
7.1 Installation Site, Location of Use.............................................................................................. 12
7.2 Unpacking, Scope of delivery................................................................................................... 12
7.3 Error message.......................................................................................................................... 13
7.4 Mains connection...................................................................................................................... 13
7.4.1 Turning On the Power .............................................................................................................. 14
7.5 Rechargeable battery operation (optional)............................................................................... 15
7.6 Load rechargeable battery ....................................................................................................... 15
7.7 Initial Commissioning................................................................................................................ 16
7.8 Connection of peripheral devices............................................................................................. 16
7.9 Adjustment................................................................................................................................ 17
7.9.1 External adjustment “CalExt”.................................................................................................... 18
7.9.2 External adjustment with user-defined adjustment weight „cALEud“....................................... 19
7.9.3 Gravitation constant Adjustment site „GrAAdJ“........................................................................ 20
7.9.4 Gravitation constant installation site „GrAuSE“ ........................................................................ 21
7.10 Verification................................................................................................................................ 22
8Basic Operation ........................................................................................... 24
8.1 Start-up..................................................................................................................................... 24
8.2 Switching Off ............................................................................................................................ 24
8.3 Zeroing ..................................................................................................................................... 24
TKFC-TM-A-BA_IA-e-2212 3
8.4 Simple weighing ....................................................................................................................... 24
8.5 Additional decimal digit............................................................................................................. 25
8.6 Switch-over weighing unit (verified appliances) ....................................................................... 25
8.7 Weighing with tare.................................................................................................................... 26
9Operating concept....................................................................................... 27
10 Application Weighing.................................................................................. 29
10.1 Application-specific settings ..................................................................................................... 29
10.2 Description of individual functions............................................................................................ 30
10.2.1 Take over the placed weight as PRE-TARE value .............................................................. 30
10.2.2 Enter the known tare weight numerically............................................................................. 31
10.2.3 Data-Hold function ............................................................................................................... 31
10.2.4 Percent weighing.................................................................................................................. 32
10.2.5 Weighing with multiplication factor....................................................................................... 32
10.2.6 Quick-change button............................................................................................................ 33
10.2.7 Application units................................................................................................................... 34
11 Application Counting................................................................................... 35
11.1 Application-specific settings ..................................................................................................... 35
11.2 Using the application................................................................................................................ 36
11.2.1 Piece counting...................................................................................................................... 36
11.3.1 Check counting .................................................................................................................... 38
12 Application Checkweighing........................................................................ 41
12.1 Application-specific settings ..................................................................................................... 41
12.2 Using the application................................................................................................................ 42
12.2.1 Target weighing.................................................................................................................... 42
12.2.2 Checkweighing..................................................................................................................... 44
13 Setup menu .................................................................................................. 46
13.1 Navigation in the menu............................................................................................................. 46
13.2 Application menu...................................................................................................................... 46
13.3 Setup menu .............................................................................................................................. 46
13.3.1 Overview setup menu non-verifiable weighing systems...................................................... 47
13.3.2 Overview setup menu verified weighing systems................................................................ 52
14 KERN Communications Protocol (KERN Interface Protocol) .................. 56
14.1 Issue functions.......................................................................................................................... 57
14.1.1 Data output after pressing the PRINT button “MANuAL” ..................................................... 57
14.1.2 Automatic data output „Auto“ ............................................................................................... 58
14.1.3 Continuous data output „cont“.............................................................................................. 59
14.1.4 Data format........................................................................................................................... 60
20 Servicing, maintenance, disposal .............................................................. 61
20.1 Cleaning ................................................................................................................................... 61
20.2 Servicing, maintenance............................................................................................................ 61
20.3 Disposal.................................................................................................................................... 61
20.4 Error messages ........................................................................................................................ 62
21 Instant help................................................................................................... 63
4 TKFC-TM-A-BA_IA-e-2212
1 Technical data
KERN
KFC-TM
Item no./ Type
TKFC-TM-A
Display
LCD 6 digits, height 50 mm with back lighting
Resolution (verifiable)
3000 e
Single (Max.) 3.000 e
Dual Range/Dual intervall 2x3.000 e
Resolution (non-verifiable)
30.000 d
Weighing ranges
2
Divisions
1,2,5, 10, n
Weighing Units
g, kg
Functions
Weighing with tolerance range, Counting function, Animal
weighing
DMS weighing cells
87-1100 .
(minimum/maximum resistance)
Data output
RS-232, USB-Device, WLAN, analogue (0-10V, 4-
20mA), Ethernet, Bluetooth via KUP (optional)
Electric Supply
Input voltage power supply unit 100 V –240 V
Input voltage appliance 6V DC, 1000mA
Housing
220 x 150 x 73
Admissible
ambient temperature
10°C –40°C (verified)
Net weight
0,8 kg
Internal rechargeable
battery
Operating / charge time
Service life background illumination ON: 21 h
Operating period background illumination OFF: 43 h
Charging time: 12 h
Tripod
KERN EOB-A02B, EOC-A05, optional
Support base
incl. wall bracket
Standard
6 TKFC-TM-A-BA_IA-e-2212
3 Appliance overview
1. Weighing plate
2. Display
3. Keyboard
4. Mains adapter connection
5. Input connection load cell cable
6. Connection KUP
TKFC-TM-A-BA_IA-e-2212 7
3.1 Keyboard overview
Button
Function in Operating mode
Function in Menu
➢Turn on/off
➢Invoke setup menu
➢Zeroing
➢Navigation key
➢Select menu item
➢Taring
➢Long pressing
Invoke application menu
➢Quick-change button
short pressing:
Unit commutation
➢Navigation key ➔
➢Activate menu item
➢Confirm selection
➢Calculate weighing data via
interface
➢Navigation key
➢Select menu item
➢Pre-Tare in weighing mode
➢Weigh Ref pcs in counting mode
➢Check menu in checkweighing
mode
➢Holdfunction in weighing mode
-
➢Change between:
„GROSS“ „NET“ „TARE“
-
8 TKFC-TM-A-BA_IA-e-2212
3.1.1 Numeric entry
Button
Designation
Function
Navigation key ➔
Select cipher
Confirm entry. Press button repeatedly for every
digit. Wait until the numeric input window
extinguishes.
Navigation key
Reduce flashing cipher (0 –9)
Navigation key
Increase flashing cipher (0 –9)
TKFC-TM-A-BA_IA-e-2212 9
3.1.2 Overview of displays
Position
Display
Description
1
Stability display
2
>0<
Zero display
3
Minus display
4
Tolerance marks for check weighing
5
Rechargeable battery charge indicator
6
Units display / Pcs/ %
selectable g, kg, lb, gn, dwt, oz,ozt, FFA
or
Application icon [Pcs] for piece counting
or [%] for determination of percentage
7
Data transfer running
8
WiFi-symbol
9
AP
Autoprint enabled
10
Weighing data can be found in the sum
memory
11
G
Display gross weight value
12
NET
Display net weight value
13
HOLD
Hold/ animal weighing function
14
PTARE
Pre-Tare function
15
W1W2
Display of selected
weighing range
LO
OK
HI
10 TKFC-TM-A-BA_IA-e-2212
4 Basic Information (General)
4.1 Proper use
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. It is intended to be
used as a “non-automatic weighing system”, i.e. the material to be weighed is manually
and carefully placed in the center of the weighing plate. As soon as a stable weighing
value is reached, the weighing value can be read.
4.2 Improper Use
Our balances are non-automatic balances and not provided for use in dynamic
weighing processes. However, the balances can also be used for dynamic weighing
processes after verifying their individual operative range, and here especially the
accuracy requirements of the application.
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 balance,
minus a possibly existing tare load, must be strictly avoided. Balance may be
damage by this.
Never operate the 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.
4.3 Warranty
Warranty claims shall be voided in case:
•Our conditions in the operation manual are ignored
•The appliance is used beyond 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
TKFC-TM-A-BA_IA-e-2212 11
4.4 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.
5 Basic Safety Precautions
5.1 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.
5.2 Personnel training
The appliance may only be operated and maintained by trained personnel.
6 Transport and storage
6.1 Testing upon acceptance
When receiving the appliance, please check packaging immediately, and the appliance
itself when unpacking for possible visible damage.
6.2 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.
12 TKFC-TM-A-BA_IA-e-2212
7 Unpacking, Installation and Commissioning
7.1 Installation Site, Location of Use
The balances 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 balance on a firm, level surface.
•Avoid extreme heat as well as temperature fluctuation caused by installing next
to a radiator or in the direct sunlight.
•Protect the balance against direct draughts due to open windows and doors.
•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.
•Avoid static charge of goods to be weighed or weighing container.
•Do not operate in areas with hazard of explosive material or in potentially
explosive atmospheres due to materials such as gasses, steams, mists or
dusts.
•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.
•If electro-magnetic fields or static charge occur, or if the power supply is
unstable major deviations on the display (incorrect weighing results) are
possible. In that case, the location must be changed.
7.2 Unpacking, Scope of delivery
Remove device and accessories from packaging, remove packaging material and
install the device at the planned work place. Check if that there has been no damage
and that all packing items are present.
Scope of delivery / serial accessories:
•Display Unit
•Mains adapter
•Support base incl. wall bracket
•Operating instructions
TKFC-TM-A-BA_IA-e-2212 13
7.3 Error message
As soon as an error message appears in the balance display, the
balance must not more be used.
7.4 Mains connection
Select a country-specific power plug and insert it in the mains adapter.
Check, whether the voltage acceptance on the scales is set correctly. Do
not connect the scales to the power mains unless the information on the
scales (sticker) matches the local mains voltage.
Only use KERN original mains adapter. Using other makes requires
consent by KERN.
Important:
➢Before starting your weighing balance, check the mains cable for
damage.
➢Ensure that the power unit does not come into contact with liquids.
➢Ensure access to mains plug at all times.
14 TKFC-TM-A-BA_IA-e-2212
7.4.1 Turning On the Power
Connect scale to power supply.
The balance carries out a selftest. Then the balance is set into stand-by mode.
The weighing balance will remain switched on as long as it is connected to the
power supply. Press the key to turn on/off the display.
To switch on the balance, press the key.
When the zero display appears, the balance is ready for operation.
To switch off press the key. During this process the weighing balance will
be moving into ready mode.
The weighing balance will be ready for operation immediately after activation
without requiring any time to warm up.
TKFC-TM-A-BA_IA-e-2212 15
7.5 Rechargeable battery operation (optional)
ATTENTION
The rechargeable battery and the battery match with each
other. Only use the delivered mains adapter.
Do not use the balance during the loading process.
The rechargeable can only be replaced by the same or by a
type recommended by the manufacturer.
The rechargeable battery is not protected against all
environmental influences. If the rechargeable battery is
exposed to certain environmental influences, it may set on
fire or explode. Persons may be injured or material damage
may occur.
Protect the rechargeable battery against fire and heat.
Do not bring the rechargeable battery in contact with fluids,
chemical substances or salt.
Do not expose the rechargeable battery to high pressure or
microwaves.
Under no circumstances the rechargeable batteries and the
charging unit may be modified or manipulated.
Do not use a defective, damaged or deformed rechargeable
battery.
Do not connect or short-circuit the electrical contacts of the
rechargeable battery with metallic objects.
Liquid may squirt out from a damaged rechargeable battery.
If the liquid gets into contact with the skin or the eyes, the
skin and the eyes may be irritated.
Ensure the correct polarity when inserting or changing the
rechargeable battery (see instructions in the battery
compartment)
The rechargeable battery operation is overridden when the
mains adapter is connected. For weighing in mains
operation > 48 hrs. the rechargeable batteries must be
removed! (Danger of overheating).
If the rechargeable battery starts to smell, being hot,
changing the colour or being deformed, it must be
immediately unplugged from mains supply and from the
balance if possible.
7.6 Load rechargeable battery
The rechargeable battery pack (Option) is charged using the mains cable supplied.
Before the first use, the rechargeable battery package should be charged by
connecting it to the mains power cable for at least 15 hours.
To save the rechargeable battery, in menu (see chap.13.3.1.) the automatic switch-
off function <Autoff> can be activated.
If the capacity of the rechargeable batteries is exhausted, <Lo Bat> appears in the
display. Connect the power cable as soon as possible to load the rechargeable
battery. Charging time until complete recharging is approx. 8 h.
16 TKFC-TM-A-BA_IA-e-2212
7.7 Initial Commissioning
In order to obtain exact results with the electronic balances, your balance must have
reached the operating temperature (see warming up time chap.1). During this
warming up time the balance must be connected to the power supply (mains,
rechargeable accumulator).
The accuracy of the balance depends on the local acceleration of gravity.
Strictly observe hints in chapter Adjustment.
7.8 Connection of peripheral devices
Before connecting or disconnecting of additional devices (printer, PC) to the data
interface, always disconnect the balance from the power supply.
With your balance, only use accessories and peripheral devices by KERN, as they
are ideally tuned to your balance.
TKFC-TM-A-BA_IA-e-2212 17
7.9 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.
•In weighing systems with a resolution of < 15 000 dividing steps, an
adjustment is recommended.
In weighing systems with a resolution of < 15 000 dividing steps, a
linearisation is recommended.
•Prepare the required adjustment weight. The adjustment weight to be
used depends on the capacity of the weighing system. Carry out
adjustment as near as possible to the weighing system’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.
•Ensure that there are no objects on the weighing pan.
•Avoid vibration and air flow.
•Always carry out adjustment with the standard weighing platform in
place.
In verified weighing systems the menu item for adjustment „CAL“ is blocked.
To disable the access lock, destroy the seal mark and actuate the
adjustment switch.
Please note:
After destruction of the seal the weighing system must be re-verified by an
authorised agency and a new verification wire/seal mark fitted before it can
be reused for applications subject to verification.
18 TKFC-TM-A-BA_IA-e-2212
7.9.1 External adjustment “CalExt”
Invoke setup menu:
In weighing mode press adjustment switch on the lower
side of the display unit.
„X10“ appears.
Press . „AdJuSt“ is displayed.
Acknowledge with . „cAL“ is displayed.
Press again. The menu item for the external
adjustment „cALEXt“ is displayed.
Press . The value of the required adjustment weight
appears.
(example)
Press , „Zero“ followed by „PutLoAd“ is displayed.
Followed by the value of the adjustment weight. At this
display place the adjustment weight.
(example)
Press . „Wait“, followed by „reMUld“ is displayed.
Remove the adjustment weight from the weighing pan.
The balance changes automatically into weighing mode.
Adjustment has now been completed successfully.
TKFC-TM-A-BA_IA-e-2212 19
Setting menu item „cAL“:
•„cALEXt“: Adjustment with external adjustment weight
•„cALEud“: Adjustment with external user-defined adjustment weight
•„GrAAdJ“: Place of adjustment
•„GrAuSE“: Installation site of the balance
7.9.2 External adjustment with user-defined adjustment weight „cALEud“
Invoke setup menu:
In weighing mode press adjustment switch on the lower
side of the display unit.
„X10“ appears.
Press . „AdJuSt“ is displayed.
Acknowledge with . „cAL“ is displayed.
Press again. The menu item for the external
adjustment „cALEXt“ is displayed.
Press . „cALEud“ is displayed. Acknowledge with
. The display to enter the adjustment weight
appears. The active decimal digit is flashing.
Enter value of the required adjustment weight using arrow
keys and acknowledge with .
„Zero“ followed by „PutLoAd“ is displayed. Followed by
the value of the adjustment weight. At this display place
the adjustment weight.
(example)
20 TKFC-TM-A-BA_IA-e-2212
Press . „Wait“, followed by „reMUld“ is displayed.
Remove the adjustment weight from the weighing pan.
The balance changes automatically into weighing mode.
Adjustment has now been completed successfully.
In case of an adjustment error (e.g. objects on the weighing plate) the display will
show the error message “Wrong”. Switch off balance and repeat the adjustment
process.
7.9.3 Gravitation constant Adjustment site „GrAAdJ“
Invoke setup menu:
In weighing mode press adjustment switch on the lower
side of the display unit.
„X10“ appears.
Press . „AdJuSt“ is displayed.
Acknowledge with . „cAL“ is displayed.
Press again. The menu item for the external
adjustment „cALEXt“ is displayed.
Press repeatedly until „GrAAdJ“ is displayed
Acknowledge with .
The current setting will be displayed. The active digit is
flashing.
(example)
Enter the required value and confirm by button.
Weighing balance returns to menu.
Press repeatedly button to exit menu.
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