KERN KFE-TM User manual

KERN & Sohn GmbH
Ziegelei 1
Phone: +49-[0]7433- 9933-0
D-72336 Balingen
Fax: +49-[0]7433-9933-149
E-Mail: [e-mail]
Internet: www.kern-sohn.com
Návod na obsluhu a inštaláciu(EN)
KERN KFE/SFE nerezová váha pre
potravinársky priemysel(SK)
Version 1.3
06/2013
GB
KFE-TM-BA_IA-e-1313

GB
KERN KFE-TM
Version 1.3 06/2013
Operating and installation instructions
Display unit
Contents
1 Technical data ................................................................................................... 4
2 Appliance overview........................................................................................... 5
2.1 Keyboard overview .................................................................................................... 6
2.1.1 Numerical input via the navigation buttons ........................................................................ 7
2.2 Overview of display.................................................................................................... 7
3 Basic Information (General) ............................................................................. 8
3.1 Proper use................................................................................................................. 8
3.2 Improper Use............................................................................................................. 8
3.3 Warranty.................................................................................................................... 8
3.4 Monitoring of Test Resources.................................................................................... 9
4 Basic Safety Precautions.................................................................................. 9
4.1 Pay attention to the instructions in the Operation Manual.......................................... 9
4.2 Personnel training...................................................................................................... 9
5 Transport and storage ...................................................................................... 9
5.1 Testing upon acceptance........................................................................................... 9
5.2 Packaging / return transport ...................................................................................... 9
6 Unpacking and installation............................................................................. 10
6.1 Installation Site, Location of Use...............................................................................10
6.2 Unpacking and installation........................................................................................10
6.3 Scope of delivery / serial accessories:......................................................................10
6.4 Transit Securing .......................................................................................................11
6.5 Mains connection......................................................................................................11
6.6 Storage battery operation (optional)..........................................................................11
6.7 Adjustment................................................................................................................12
6.8 Linearization .............................................................................................................15
6.9 Verification................................................................................................................16
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7 Operation ......................................................................................................... 18
7.1 Start-up.....................................................................................................................18
7.2 Switching Off ............................................................................................................18
7.3 Zeroing .....................................................................................................................18
7.4 Simple weighing........................................................................................................18
7.5 Weighing with taring .................................................................................................19
7.6 Weighing with tolerance range .................................................................................19
7.7 Manual totalizing.......................................................................................................22
7.8 Automatic adding-up.................................................................................................24
7.9 Animal weighing........................................................................................................25
8 Menu................................................................................................................. 26
8.1 Navigation in the menu.............................................................................................26
8.2 Overview...................................................................................................................26
9 Service, maintenance, disposal ..................................................................... 28
9.1 Cleaning ...................................................................................................................28
9.2 Service, maintenance ...............................................................................................28
9.3 Disposal....................................................................................................................28
9.4 Error messages........................................................................................................29
10 Instant help................................................................................................... 30
11 Installing display unit / weighing bridge.................................................... 31
11.1 Technical data..........................................................................................................31
11.2 Weighing system design...........................................................................................31
11.3 How to connect the platform.....................................................................................32
11.4 Configure display unit ...............................................................................................33
12 Enclosure Declaration of conformity / Type approval / Test certificate. 36
KFE-TM-BA_IA-e-1313 3

1 Technical data
KERN
KFE-TM
Display
6-digit
Solution verifiable
6.000 e
Verification class
III
Weighing ranges
2
Divisions
1,2,5,…10, n
Display
LCD 22 mm digits with back lighting
DMS weighing cells
80-100 . Max. 4 items per 350 ;
Sensitivity 2-3 mV/V
Electric Supply
Input voltage 220 V – 240 V, 50 Hz
Mains adapter secundary voltage 12V, 500 mA
6 x 1.5 V, 4 Ah
Rechargeable battery
(optional)
Service life – background illumination OFF 45 h
Loading time 12 h
Admissible
ambient temperature
-10°C – 40°C
Net weight
1.9 kg
Protection type
IP 65 as per DIN EN 60529
Dimensions:
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2 Appliance overview
Front view:
1. Weight display
2. Keyboard
Rear view:
3. Wall bracket
4. Connection power supply (mains adapter)
5. Fastening screws
6. Connection platform
7. Position of seal / housing screw
KFE-TM-BA_IA-e-1313 5

2.1 Keyboard overview
Key
Function
Turn on/off
Zeroing
Navigation key
Confirm entry
Taring
Navigation key 
Scroll forward in menu
At numeric input increase flashing digit
Add weighing value to summation memory
Display sum total
Delete total added memory
Change between gross and net weight
Navigation key 
Digit selection to the right
Switch-over weighing unit
ESC
Back to menu/weighing mode
KFE-TM-BA_IA-e-13136

2.1.1 Numerical input via the navigation buttons
Key
Function
Digit selection to the left
Delete
Digit selection to the right
Increase flashing digit
Terminate input
2.2 Overview of display
Display
Significance
HI
OK
LO
Status indicatoren for weighing with tolerance range
HI: Weighed goods over default tolerance
OK: Weighed goods within default tolerance
OK: Load below specified tolerance
ZERO
Indicator zero display
TARE
Indicator for saved tare value
NET
The displayed weighing value is a net weighing value
GROSS
The displayed weighing value is a gross weighing value
STABLE
Stability display
AUTO
Function for „Automatic totalizing“ is activated
ANIMAL
Animal weighing mode is activated
Charging status of rechargeable battery (optional)
KFE-TM-BA_IA-e-1313 7

3 Basic Information (General)
3.1 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 centre of the weighing plate. As soon as a
stable weighing value is reached the weighing value can be read.
3.2 Improper Use
Do not use display unit for dynamic weighings. 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 plate. 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
weighing 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 faults and destruction 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.
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
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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.
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 such as the glass wind screen, the
weighing platform, power unit etc. against shifting and
damage.
KFE-TM-BA_IA-e-1313 9

6 Unpacking and installation
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.
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 Unpacking and installation
Take the display unit carefully out of its packaging, remove the plastic jacket and
install it at the designated work space. Mount the display unit in a way that facilitates
operation and where it is easy to see.
6.3 Scope of delivery / serial accessories:
For display unit, see chapter 2
Mains adapter
Operating instructions
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6.4 Transit Securing
Please note, if the display unit is used together with platform with transportation lock,
this transportation lock must be released prior to use.
See operating instructions attached to the respective platform.
6.5 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.
6.6 Storage battery operation (optional)
Before the first use, the battery should be charged by connecting it to the mains
power supply for at least 12 hours.
The appearance of the rechargeable battery symbol in the weight display indicates
that the battery is almost exhausted. The unit will be ready for operation for approx.
another 10 hours before switching off automatically. Charge the battery with the help
of the supplied power pack.
The rechargeable battery symbol shows the charge status of the rechargeable
battery:
Voltage has dropped below prescribed minimum.
Battery very low.
Battery is completely discharged
KFE-TM-BA_IA-e-1313 11

6.7 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.
The adjustment is locked for verified balances.
In order to unlock the access, the seal must be destroyed and the
jumper on the printed circuit board must be fitted (see chap. 6.9).
Attention:
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.
The weight to be used depends on the capacity of the scale. 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.
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Call-up menu
In weighing mode press and at the same time and
the first menu block will appear.
Press repeatedly until is displayed.
Press , password query will appear.
Press , , subsequently until the first menu item
is shown.
Press repeatedly until is displayed.
Confirm by .
Press repeatedly until the currently balance typ will be
displayed.
= Singel range
= Dual range
= Multi interval


Confirm by .
Press repeatedly until will be displayed.
Confirm by and select by .
= Justierung
= Linearisierung

KFE-TM-BA_IA-e-1313 13

Procedure
Confirm menu setting by .
Ensure that there are no objects on the weighing plate.
Wait for stability display, then press .

The currently set adjustment weight will be displayed.
Either use the displayed adjustment weight or change it with
, and (numerical input see chapter 2.1.1), the
active digit is flashing.
Confirm by , „LoAd“ will be shown.
Carefully place adjusting weight in the centre of the weighing
plate. Wait for stability display, then press .
After the adjustment the balance will carry out a self-test.
Remove adjusting weight during selftest, balance will return
into weighing mode automatically.
An adjusting error or incorrect adjusting weight will be
indicated by the error message; repeat adjustment
procedure.
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6.8 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 testing instrument control, you can
improve this by means of linearization.
Carrying out linearization is restricted to specialist staff possessing well
acquainted with the workings of weighing scales.
The linearisation is locked for verified weighing systems.
In order to unlock the access, the seal must be destroyed and the
jumper on the printed circuit board must be fitted (see chap. 6.9).
Attention:
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.
The test weights to be used must be adapted to the weighing scale’s
specifications; see chapter 3.4 “testing instruments control”.
Observe stable environmental conditions. Stabilisation requires a
certain warm-up time.
After successful linearization you will have to carry out calibration; see
chapter “testing instruments control”
Procedure:
Call-up menu setting , see chap. 6.7.

Acknowledge with .
Ensure that there are no objects on the weighing plate.
Wait for stability display „STABLE“, then press . When
“LoAd 1“ is displayed, put the first adjustment weight (1/3
max) carefully in the centre of the weighing platform.
Wait for stability display „STABLE“, then press . When
“LoAd 2“ is displayed, put the second adjustment weight
(2/3 max) carefully in the centre of the weighing platform.
KFE-TM-BA_IA-e-1313 15

Wait for stability display „STABLE“, then press . When
“LoAd 3“ is displayed, put the third adjustment weight (1/3
max) carefully in the centre of the weighing platform.
Wait for stability display „STABLE“, then press .
After the adjustment the balance will carry out a self-test.
Remove adjusting weight during selftest, the appliance will
return into weighing mode automatically.
An adjusting error or incorrect adjusting weight will be
indicated by the error message; repeat adjustment
procedure.
6.9 Verification
General introduction:
According to EU directive 90/384/EEC or 2009/23EG balances must be officially
verified if they are used as follows (legally controlled area):
a) For commercial transactions if the price of goods is determined by weighing.
b) For the production of medicines in pharmacies as well as for analyses in the
medical and pharmaceutical laboratory.
c) For official purposes
d) For manufacturing final packages
In cases of doubt, please contact your local trade in standard.
Verification notes:
An EU type approval exists for balances described in their technical data as
verifyable. If a balance is used where obligation to verify exists as described above, it
must verified and re-verified in regular intervals.
Re-verification of a balance is carried out according to the respective national
regulations. The validity for verification of balances in Germany is e.g. 2 years.
The legal regulation of the country where the balance is used must be observed!
Verification of the balance is invalid without the seal.
The seal marks attached on verified balances point out that the balance may
only be opened and serviced by trained and authorised specialist staff. If the
seal mark is destroyed, verification looses its validity. Please observe all
national laws and legal regulations. In Germany a re-verification will be
necessary.
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Position of seals and jumper
Access to conductor plate:
Remove seal
Open display unit
For adjustment / access
to the configuration
menu the jumper „CAL“
must be fitted.
KFE-TM-BA_IA-e-1313 17

7 Operation
7.1 Start-up
Press and the instrument will carry out a self-test. As soon as the weight
display appears, the instrument will be ready to weigh.
7.2 Switching Off
Press and the display will disappear.
7.3 Zeroing
Resetting to zero corrects the influence of light soiling on the weighing plate.
To unload the weighing system
Press and zero display as well as indicator ZERO will appear.
7.4 Simple weighing
Place goods to be weighed on balance.
Wait until stability display STABLE appears.
Read weighing result.
Overload warning
Overloading exceeding the stated maximum load (max) of the device, minus
a possibly existing tare load, must be strictly avoided. This could damage the
instrument.
Exceeding maximum load is indicated by the display of “ol“, and an audio
sound. Unload weighing system or reduce preload.
18 KFE-TM-BA_IA-e-1313

7.5 Weighing with taring
Deposit weighing vessel. After successful stop check press the button. Zero
display and indicator NET appear.
The weight of the container is now internally saved.
Weigh the material, the net weight will be indicated.
After removing the weighing container, the weight of the weighing container
appears as negative display.
The taring process can be repeated any number of times, e.g. when adding
several components for a mixture (adding). The limit is reached when the whole
weighing range is exhausted.
To change between gross weight and net weight, press .
To delete the tare value, remove load from weighing plate and press .
7.6 Weighing with tolerance range
You can set an upper or lower limit when weighing with tolerance range and thus
ensure that the weighed load remains exactly within the set limits.
During tolerance controls such as dispensing, portioning or sorting the unit will
indicate whether a value exceeds or falls short of limits with an optical [LO, OK, HI]
as well as an audio signal according to the setting in the menu block “F4
oFF_BEEP“; see chapter 8.2.
Selectable mode
Description
Acoustic signal switched off, only optical signal active
bp 1
[LO], [OK] or [HI]
If load is within tolerance range, [ok] will be displayed
bp 2
and audio signal will be sounded.
If the load is beyond the tolerance range [ok] will be
bp 3
shown and the audio signal will sound.
KFE-TM-BA_IA-e-1313 19

1. Call up menu

In weighing mode press and at the same time and
the first menu block will appear.
2. Set limit values
Keep on pressing until the display used for entering the
lower limit SET LO appears.
Press and current setting will be displayed.
To enter the lower limit, e. g. 1000 Kg, press the navigation
keys (See chpt. 2.1.1); the currently enabled digit will be
flashing.
Confirm input by .
Select SET HI by pressing .
Press and the current setting for the upper limit will be
displayed.
Press the navigation keys (See chpt. 2.1.1) to enter the
upper limit, e.g. 1,100 kg; the currently enabled digit will be
flashing.
Confirm input by .
Press and the unit will return to the menu
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