KERN & Sohn GmbH
Ziegelei 1
E-Mail: info@kern-sohn.com
Tel: +49-[0]7433- 9933-0
Internet: www.kern-sohn.com
Operating and Inst allation
Instructions Display device
KERN KFS-T
Version 1.3
10/2012
GB
D-72336 Balingen
Fax: +49-[0]7433-9933-149
KFS-T-BA_IA-e-1213
KERN KFS-T
Display unit
GB
Version 1.3 10/2012
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 ............................................................................................................... 8
3 Basic Information (Gen eral) ............................................................................. 9
3.1 Proper use ................................................................................................................. 9
3.2 Improper Use ............................................................................................................. 9
3.3 Warranty .................................................................................................................... 9
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 .................................................................................... 10
5.1 Testing upon acceptance ..........................................................................................10
5.2 Packaging / return transport ......................................................................................10
6 Unpacking and placing ................................................................................... 11
6.1 Installation Site, Location of Use ...............................................................................11
6.2 Scope of delivery / serial accessories: ......................................................................11
6.3 Unpacking/installation ...............................................................................................12
6.4 Mains connection ......................................................................................................13
6.5 Adjustment ................................................................................................................13
6.6 Linearization .............................................................................................................16
7 Operation ......................................................................................................... 18
7.1 Start-up .....................................................................................................................18
7.2 S
witching Off ............................................................................................................18
7.3 Zeroing .....................................................................................................................18
7.4 Simple weighing ........................................................................................................18
7.5 Weighing with tare ....................................................................................................19
2 KFS-T-BA_IA-e-1213
7.6 Counting ...................................................................................................................19
7.6.1 Determination of the average piece weight by weighing ................................................. 20
7.6.2 Numeric input of the average piece weight ..................................................................... 21
7.7 Totalization ...............................................................................................................22
7.7.1 Manual totalizing .............................................................................................................. 23
7.7.2 Automatic adding-up ........................................................................................................ 27
7.8 Tolerance check .......................................................................................................29
7.8.1 Tolerance check for target quantity ................................................................................. 32
7.8.2 Tolerance check for target weight.................................................................................... 34
8 Function menu ................................................................................................. 37
9 RS 232C interface ............................................................................................ 41
9.1 Printer mode .............................................................................................................42
9.2 Remote control instructions.......................................................................................42
10 Service, maintenance, disposal .................................................................. 43
10.1 Clean ........................................................................................................................43
10.2 Service, maintenance ...............................................................................................43
10.3 Disposal ....................................................................................................................43
11 Error messages, troubleshooting guide .................................................... 44
12 Installing display unit / weighing bridge .................................................... 45
12.1 Technical data ..........................................................................................................45
12.2 Weighing system design ...........................................................................................45
12.3 How to connect the platform .....................................................................................46
12.4 Configuring display devices ......................................................................................47
13 Declaration of conformity ........................................................................... 52
KFS-T-BA_IA-e-1213 3
1 Technical data
KERN KFS-T
Display 6-digit
Divisions 1,2,5,…10n
Weighing Units kg
Display LCD 16.5 mm digits with back lighting
DMS weighing cells
Range calibration We recommend ≥ 50 % max.
Electric Supply
Housing 260 x 150 x 65
Admissible
ambient temperature
Net weight 1.5 kg
Rechargeable battery
(optional)
Operating / charge time
Support base
incl. wall bracket
80-100 Ω. Max. 4 item per 350 Ω;
Sensitivity 2-3 mV/V
Input voltage 220 V – 240 V, 50 Hz
Power pack secondary voltage 12V, 500mA
0°C – 40°C
40 h / 12 h
Standard
Data output RS232
4 KFS-T-BA_IA-e-1213
2 Appliance overview
1. Display “weight”
2. Display “average item weight“
3. Display “quantity”
4. Tolerance margin, see chpt. 7.6
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. Guide rail support base / stand
12. End stop support base / stand
13. Mains adapter connection
KFS-T-BA_IA-e-1213 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-T-BA_IA-e-1213
• Display quantity
Here the current piece quantity (PCS = pieces) or in totalizing mode the sum
Sum of the placed parts is displayed, see chapter 7.8.
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-T-BA_IA-e-1213 7
How to select menu items
2 x briefly
Invalid entry
2.2 Keyboard overview
Key Function
Turn on/off
Taring (>2 % Max)
Zero setting (< 2 % Max)
Change menu settings
For entering of item weight by weighing see chpt. 7.6.1
For numeric entry of item weight see chpt. 7.6.2
Reference optimisation
….
2.3 Audio signal
1 x briefly Confirm by pressing key
Set / call limits for tolerance check
Addition in sum memory
Exit menu, return to weighing mode
Calculate weighing data via interface
Call function menu
Numeric keys
Decimal point
Delete key
1 x longer Saving was successful
3 x briefly Missing entry
continuous
8 KFS-T-BA_IA-e-1213
Tolerance check depends on
menu setting ”14.bu”, see chap. 8
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 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 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
KFS-T-BA_IA-e-1213 9
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 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.
10 KFS-T-BA_IA-e-1213
• For display unit, see chapter 2
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.
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 / serial accessories:
• Mains adapter
• Support base incl. wall bracket
• Protective cover
• Operating instructions
KFS-T-BA_IA-e-1213 11
Wall bracket
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 support base and wall bracket
Push support base in guide rail [11] up to end stop [12], see chap. 2.
Using with tripod (optional)
To position the display higher up, the display unit may be mounted on an optionally
available tripod. (KERN IFB-A01/A02).
12 KFS-T-BA_IA-e-1213
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 weight depends on the capacity of the
weighing system. Carry out adjustment as near as possible to the
scale’s maximum weight. Information about test weights you will find in
the internet under: http://www.kern-sohn.com
• Observe stable environmental conditions. Stabilisation requires a certain
warm-up time.
KFS-T-BA_IA-e-1213 13
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.
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.
Acknowledge by and select desired setting with .
= Linearization
= Adjustment
14 KFS-T-BA_IA-e-1213
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 self test. During
this self test 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.
KFS-T-BA_IA-e-1213 15
• 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
5kg
10kg
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 testing instrument control, 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 “testing instruments control”.
• Observe stable environmental conditions. Stabilisation requires a
certain warm-up time.
• Do not remove the adjustment weight during linearization in step
LAOD 1 to LOAD 4, merely increase it instead. Conversely do not
remove the adjustment weight during step LAOD 4 to LOAD 1,
merely increase it instead.
• After successful linearisation you will have to carry out calibration;
16 KFS-T-BA_IA-e-1213
• An adjusting error or incorrect adjusting weight will be indicated by the error
and .
Call menu item linearization , see chap. 6.5
Confirm menu setting with .
Ensure that there are no objects on the weighing plate.
“LoAd 1” will be displayed after standstill control has been carried out. Put the
first adjustment weight approx. 1/4 Max (see table 1) carefully in the centre of the
weighing pan.
“LoAd 2” will be displayed after standstill control has been carried out.
Put the second adjustment weight approx. 2/4 max (see table 1) carefully in the
centre of the weighing pan. “LoAd 3” will be displayed after standstill control has
been carried out.
Put the third adjustment weight approx. 3/4 max (see table 1) carefully in the
centre of the weighing pan. “LoAd 4” will be displayed after standstill control has
been carried out.
Put the forth adjustment weight approx. 4/4 max (see table 1) carefully in the
centre of the weighing pan.
After successful standstill control the balance carries out a selftest, then it
automatically returns to weighing mode.
message; repeat adjustment procedure.
• You can cancel adjustment by pressing any key with the exception of
KFS-T-BA_IA-e-1213 17
Overloading exceeding the stated maximum load (max) of the device, minus a
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.
Resetting range ± 2 % max.
To unload the weighing system
Press , the zero display as well as the indicator [] next to a will
appear.
7.4 Simple weighing
Place goods to be weighed on balance.
Wait for stability display [].
Read weighing result.
Overload warning
possibly existing tare load, must be strictly avoided. This could damage the
instrument.
Exceeding maximum loads is indicated by the display of “O-err“, and an audio
sound. Unload weighing system or reduce preload.
18 KFS-T-BA_IA-e-1213
The average piece weight can only be determined by stable weighing
7.5 Weighing with tare
Deposit weighing vessel. After successful standstill control press the button.
Zero display and the indicator [] next to TARE 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 tare procedure can be repeated as many times as necessary, for example
with initial weighing of several components for a mix (add-on weighing). The limit
is reached when the total weighing range capacity is full.
To delete the tare value, remove load from weighing plate and press .
7.6 Counting
During piece counting parts can either be counted into a container or out of a
container. To count a greater number of parts the average weight per part has to be
determined with a small quantity (reference quantity). The larger the reference
quantity, the higher the counting exactness.
High reference must be selected for small parts or parts with considerably different
sizes.
values.
If weighing values are under zero, the piece counter display shows a
negative number of items.
The message light appearing on the display indicates that load falls below
minimum weight value.
Delete incorrect entries by pressing .
The accuracy of an average item weight can be improved at any time
during additional counting processes. For this purpose add additional
items and press . After the reference optimization sounds a signal
tone. As the additional pieces increase the base for the calculation, the
reference also becomes more exact.
KFS-T-BA_IA-e-1213 19
Count the items
7.6.1 Determination of the average piece weight by weighing Set reference
Reset balance to zero or tare the empty weighing container if necessary.
Place on the weighing plate a known number (e.g. 10 items) of individual pieces
as a reference.
Wait for the stability display, than enter the number of individual items via the
numeric keypad.
Acknowledge with .
The balance determines the average piece weight.
Tare if necessary, place weighing good and read off the number of items.
Delete reference
Press and the average unit weight will be deleted.
20 KFS-T-BA_IA-e-1213
7.6.2 Numeric input of the average piece weight
Set reference
Enter established item weight by pressing numeric keys and confirm by .
Count the items
Tare if necessary, place weighing good and read off the number of items.
Delete reference
Press and the average unit weight will be deleted.
KFS-T-BA_IA-e-1213 21
Currently placed weight
Selected item weight
Preview: currently placed quantity of
items + current total number of items
7.7 Totalization Adding-up during weight display:
Weight display: Currently placed weight
Item weight display: Selected item weight
Item quantity display: Currently placed quantity of items
Currently placed quantity of items
Adding-up during item display:
Press and the display changes to item display.
Weight display: Currently placed item quantity
Item weight display: Currently placed item quantity + total of added
display values
Item quantity display: Total of added-up display values
Currently placed quantity of items
Current total number of items
22 KFS-T-BA_IA-e-1213
Currently placed weight
Selected item weight
7.7.1 Manual totalizing
With this function the individual weighing values are added into the summation
memory by pressing and edited, when an optional printer is connected.
Menu setting:
„F11 AC“ „5 AC 1“, see chap. 8
„F7 UA“ „4 UA 5“ see chap. 8
Calculate the average item weight (see chap. 7.6.1) or enter it manually (see
chap. 7.6.2).
Place weighing goods A.
Currently placed quantity of items
Wait for stability display, then press . The displayed value (e.g. 50 pieces) will
be added to the summation memory and printed if an optional printer is
connected.
****************
NO: 1
GS: 5.0000kg
UW: 100g
PCS: 50pcs
****************
Remove the weighed good. More weighed goods can only be added when the
display ≤ zero.
KFS-T-BA_IA-e-1213 23
Place goods to be weighed B.
Wait for stability display, then press . The displayed value (e.g. 20 pieces) will
be added to the summation memory and printed if an optional printer is
connected.
****************
NO: 2
GS: 2.0000kg
UW: 100g
PCS: 20pcs
****************
The total weight, the number of weighings as well as the total number of pieces
will shortly appear (Indicator [] next to TOTAL).
Afterwards the display will change to the currently placed unit quantity (indicator
[] next to PCS)
Add more weighed goods as described before.
Please note that the weighing system must be unloaded between the individual
weighing procedures.
This process may be repeated 99 times or till such time as the capacity of the
weighing system has been exhausted.
24 KFS-T-BA_IA-e-1213
Total weight
Number weighing proces s es
Display and output sum „Total“:
Unload the weighing pan and press , the total weight, the number of
weighings, followed by the total number of pieces will be shown for 2 sec and
printed if an optional printer is connected.
Indicator:
Total number of pieces
Printout example:
****************
Total
NO: 2
WT: 7.0000kg
PCS: 70pcs
****************
KFS-T-BA_IA-e-1213 25
Delete weighing data:
Press to display the total weight, the number of weighing procedures and
the total quantity for 2 sec. During this display press .
26 KFS-T-BA_IA-e-1213
7.7.2 Automatic adding-up
With this function the individual weighing values are automatically added into the
summation memory when the balance is unloaded and edited, when an optional
printer is connected.
Menu setting:
Adding-up:
Calculate the average item weight (see chap.. 7.6.1) or enter it manually
(see chap.. 7.6.2).
Place weighing goods A.
After the standstill control sounds a signal tone, the weighing value will be
added into the summation memory.
Remove the weighed good. When an optional printer is connected, data
will be edited.
„F11 AC“ „5 AC 0“, see chap. 8
„F7 UA“ „4 UA 5“ see chap. 8
****************
NO: 1
GS: 5.0000kg
UW: 100g
PCS: 50pcs
****************
More weighed goods can only be added when the display ≤ zero.
Place goods to be weighed B.
After the standstill control sounds a signal tone, the weighing value will be
added into the summation memory.
Remove the weighed good.
The total weight, the number of weighings as well as the total number of
pieces will shortly appear (Indicator [] next to TOTAL).
When an optional printer is connected, data will be edited.
****************
NO: 2
GS: 2.0000kg
UW: 100g
PCS: 20pcs
****************
KFS-T-BA_IA-e-1213 27
Add more weighed goods as described before.
Please note that the weighing system must be unloaded between the
individual weighing procedures.
This process may be repeated 99 times or till such time as the capacity of the
weighing system has been exhausted.
Display and output sum „Total“:
Unload the weighing pan and press , the total weight, the number of
weighings, followed by the total number of pieces will be shown for 2 sec
and printed if an optional printer is connected.
****************
Total
NO: 2
WT: 7.0000kg
PCS: 70pcs
****************
Delete weighing data:
Press to display the total weight, the number of weighing procedures
and the total quantity for 2 sec. During this display press .
28 KFS-T-BA_IA-e-1213
7.8 Tolerance check
The weighing scales allow weighing goods according to a target quantity or target
weight within specified tolerances. With this function one can also check if the
weighing good is within a defined tolerance range. Reaching target quantity is
indicated by an audio sound (if enabled in menu) and a visual signal
(Tolerance margin ) displayed.
For menu settings, see chapter 8:
Target quantity / target
weight with tolerances
Accurate target quantity /
accurate target weight
without tolerance
Audio signal:
The audio sound depends on the settings made in menu block “F4 bU“, see chpt 8.
Options:
14 bu0 Acoustic signal turned off
14 bu 1 Audio signal will ring out when load is within tolerance range.
14 bu 2 Audio signal will ring out when load is beyond tolerance range.
Optical signal:
The triangular tolerance marker [ ] in the display of the display shows whether the
goods to be weighed are within the two tolerance limits.
2 limits Menu setting “F3 Pn / 13.Pn 2”,
see chap.. 8
1 limit Menu setting “F3 Pn / 13.Pn 1”,
see chap.. 8
Target quantity / target weight exceeds maximum tolerance limit
Target quantity / target weight within tolerance range
Target quantity / target weight below minimum tolerance limit
KFS-T-BA_IA-e-1213 29
Tolerance check „Counting“
Activate function
For menu setting “F0 SEL 2“ see chpt. 8
Tolerance check „Weighing“
30 KFS-T-BA_IA-e-1213
Display limits
Tolerance check for target weight
1.
Press to display the lower limit for target weight including current setting.
Press to display the upper limit for target weight including current setting.
Tolerance check for target quantity
2.
Press to display the lower limit for target quantity including current setting.
Press to display the upper limit for target quantity including current setting.
Return to weighing mode using
KFS-T-BA_IA-e-1213 31
If required, delete the current setting by pressing .
7.8.1 Tolerance check for target quantity
Activate menu setting „F0 sel / SEL 2“, see chap.7.8 „Activate function“.
Set limit values
Press to display the lower limit including current setting.
Use the numeric keys to enter the quantity for the lower limit (such as 70 units)
and confirm by pressing .
The upper limit will be displayed with the current setting.
Delete with if necessary.
Use the numeric keys to enter the quantity for the upper limit (such as 80 units)
and confirm by pressing .
32 KFS-T-BA_IA-e-1213
Start tolerance check
Specify unit weight, see chap. 7.6.1 or 7.6.2
Place load and wait until tolerance margin [] appears. With the help of the
indicator check if the weighed goods are under, inside or over the default
tolerance.
Depending on the setting in the menu an additional audio signal may be sounded.
Target quantity below tolerance:
Target quantity within tolerance:
Target quantity exceeds tolerance:
KFS-T-BA_IA-e-1213 33
7.8.2 Tolerance check for target weight
Activate menu setting „F0 sel / SEL 1“, see chap.7.8 „Activate function“.
Set limit values
Press to display the lower limit including current setting.
Delete with if necessary.
Use the numeric keys to enter the weight for the lower limit value (such as 3 kg)
and confirm by pressing .
The upper limit for the target weight including current setting will be displayed.
Delete with if necessary.
34 KFS-T-BA_IA-e-1213
Use the numeric keys to enter the upper limit (such as 4 kg) and confirm by .
KFS-T-BA_IA-e-1213 35
Start tolerance check
Place load and wait until tolerance indicator [] appears. With the help of the
tolerance indicator check if the weighed goods are under, inside or over the
default tolerance.
Depending on the setting in the menu an additional audio signal may be sounded.
Target weight below tolerance:
Target weight within tolerance:
Target weight exceeds tolerance:
36 KFS-T-BA_IA-e-1213
8 Function menu
Navigation in the menu:
Call up menu
In weighing mode keep pressed until FSEt appears.
Release button. The first menu item F0. SEL is displayed.
Select menu items
With help of , the individual menu items can be
selected one after the other.
etc.
KFS-T-BA_IA-e-1213 37
to the menu.
Change settings
Confirm setting
Confirm selected menu item with and the current
setting will be shown.
Change setting in selected menu item by pressing .
Confirm required setting with and the appliance returns
Return to weighing
mode
Press to return to weighing mode .
38 KFS-T-BA_IA-e-1213
1 SEL2*
Tolerance check for counting
standstill control is not yet displayed.
with standstill control.
Tolerance marker is only displayed above zero
range.
Tolerance marker is displayed for the whole
range.
13 Pn 0
13 Pn 1*
14 bu0*
14 bu1
14 bu2
2 Ao1
Automatic limiting point correction on, 0.5 d
2 Ao2*
Automatic limiting point correction on, 1 d
2 Ao3
Automatic limiting point correction on, 2 d
2 Ao4
Automatic limiting point correction on, 4 d
3 Ap0*
AUTO OFF function disabled
4 UA0
Output via RS232C interface disabled
4 UA1*
Continuous data output
4 UA2
Continuous data output of stable weighing values
One output for stable weighing value. No output
stabilization.
Remote control commands, see chap. 9.2.8 /
output after pressng the PRINT button
Standard printer setting, output after pressing the
PRINT button
4 UA6
Not documented
*
Overview:
Menu item Availabl e sett i ngs
F0 SEL
Enable tolerance check
F1 Co
Display conditions of the tolerance
marker
F2 Li
Tolerance range
F3 Pn
Number of limiting points
F4 bU
Audio signal
F5 Ao
Automatic zero point correction
(zero tracking)
1 SEL0
1 SEL1*
11 Co0
11 Co 1*
12 Li 0
12 Li 1*
2 Ao0
Tolerance check disabled
Tolerance check for weighing
Tolerance marker is always displayed, even if
Tolerance marker is only displayed in connection
1- Limiting point (OK/ -)
2- Limiting points (+/OK/-)
Audio sound during tolerance check disabled
Audio sound when load is within tolerance limits
Audio sound when load is beyond tolerance limits
Automatic zero tracking off
F6 AP
Automatic shutdown for battery
operation
F7 UA
RS-232 mode
F8 bl.
Baud rate
3 Ap1
4 UA3
4 UA4
4 UA5
41 bl 0
41 bl1
41 bl 2
41 bl 3
Instrument will be switched off after 3 minutes of
inactivity of display unit or weighing bridge.
for stable weighing values. Renewed output after
1200 bps
2400 bps
4800 bps
9600 bps
KFS-T-BA_IA-e-1213 39
For automatic totalizing see chap. 7.7.2
edited, when an optional printer is connected.
Manual totalizing, see chap. 7.7.1
printer is connected.
Automatic background illumination on when
weighing pate is loaded or key pressed.
F9 PA
Parity
42 Pr0*
44 Pr1
44 Pr2
F10 S0 Sd0 on*
Sd0 of
F11 AC 5 AC 0
5 AC 1*
F12 bk
Display background illumination
5 bkL0
5 bkL1*
5 bkL2
No parity bit
Odd parity
Even parity
Autom. printout enabled on zero display
Autom. printout disabled on zero display
With this function the individual weighing values
are automatically added into the summation
memory when the balance is unloaded and
With this function the individual weighing values
are added into the summation memory by
pressing and edited, when an optional
Background illumination off
Continuous background lighting
Factory settings are marked by *.
40 KFS-T-BA_IA-e-1213
PC
Balance
Pin nr.
Signal
Input/Output
Function
3
TXD
Output
Transmit data
TXD
RXGNRX
TXD
GN
3
2 5 2
3
5
9 RS 232C interface
The RS 232C interface allows a bi-directional data exchange from the balance to
external devices. This data exchange is asynchronous using ASCII - Code.
The following conditions must be met to provide successful communication between
the weighing system and the printer.
• Use a suitable cable to connect the display unit to the interface of the printer.
Faultless operation requires an adequate KERN interface cable.
• Communication parameters (Baud rate, parity, see chap. 8) of display device
and printer must match.
Pin allocation of balance output plug:
2 RXD Input Receive data
4 DTR Output HIGH
5 GND - Signal ground
6 - -
7 - -
8 - -
9 GND - Signal ground
Interface cable:
D-SUB9P
D-SUB9P
KFS-T-BA_IA-e-1213 41
ST
Stable value
US
Instable value
NT
Net weight
GS
Gross weight
NO
Number of weighing when totalizing
UW
Average piece weight
PCS
Quantity
WT
Total weight „Total“
ST, GS 1.000kg
9.1 Printer mode
Printout example (KERN YKB-01N):
Symbols:
9.2 Remote control instructions
Command Function Printout example
S Stable weighing value for the weight is
sent via the RS232 interface
W Weighing value for the weight (stable or
unstable) is sent via the RS232 interface
T No data are sent, the balance carries out
the tare function.
Z No data are sent, the zero-display
appears.
P Quantity will be sent via the RS232-
interface
ST,NT 0.0000kg
ST,GS 1.9990kg
-
-
ST,GS 10pcs
42 KFS-T-BA_IA-e-1213
10 Service, maintenance, disposal
10.1 Clean
Before cleaning, disconnect the appliance from the operating voltage.
Please do not use aggressive cleaning agents (solvents or similar agents), but a
cloth dampened with mild soap suds. Take care that the device is not penetrated by
fluids and polish it with a dry soft cloth.
Loose residue sample/powder can be removed carefully with a brush or manual
vacuum cleaner.
Spilled weighing goods must be removed immediately.
10.2 Service, maintenance
The appliance may only be opened by trained service technicians who are authorized
by KERN.
Before opening, disconnect from power supply.
10.3 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.
Should other error messages occur, switch balance off and then on again. If the error
message remains inform manufacturer.
KFS-T-BA_IA-e-1213 43
The displayed weight does
• The unit is not switched on.
• Mains power supply interrupted (mains cable
defective).
• Power supply interrupted.
• (Rechargeable) batteries are inserted incorrectly or
empty
• No (rechargeable) batteries inserted.
The displayed weight is
• Table/floor vibrations
• Weighing pan has contact with other objects.
possible)
The weighing result is
• The display of the balance is not at zero
• Adjustment is no longer correct.
• The weighing pan is not level
• Great fluctuations in temperature.
possible)
11 Er ror messages, troubleshooti ng guide
In case of an error in the program process, briefly turn off the appliance and
disconnect from power supply. The weighing process must then be restarted from the
beginning.
Fault Possible cause
not glow.
permanently changing
obviously incorrect
Error message Possible cause
o-Err
• Draught/air movement
• Electromagnetic fields / static charging (choose
different location/switch off interfering device if
• Warm-up time was ignored.
• Electromagnetic fields / static charging (choose
different location/switch off interfering device if
• Weighing range exceeded
u-Err
b-Err
1-Err
2-Err
l-Err
Err 3
Should other error messages occur, switch device off and then on again. If the error
message remains inform manufacturer.
44 KFS-T-BA_IA-e-1213
• Insufficient preload, e. g. missing weighing pan
• Missing internal memory
• Incorrect adjusting weight
• Inappropriate adjustment
• Item weight too low
• Adjustment error
• Transport safety device has not been removed
12 Ins t a lling display unit / weighing bridge
Installation / configuration of the weighing system must be carried out by a well
acquainted specialist with the workings of weighing balances.
12.1 Technical data
Supply voltage: 5 V/150mA
Sensitivity 2-3 mV/V
Resistance parameter 80 - 100 Ω, max 4 items per 350 Ω load cell
12.2 Weighing system design
The display unit is suitable for connection to any analogue platform in compliance
with the required specifications.
The following data must be established before selecting a weighing cell:
• Weighing balance capacity
This usually corresponds to the heaviest load to be weighed.
• Preload
This corresponds to the total weight of all parts that are to be placed on the
weighing cell such as upper part of platform, weighing pan etc.
• Total zero setting range
This is composed of the start-up zero setting range (± 2%) and the zero
setting range available to the user via the ZERO-key (2%). The total zero
setting range equals therefore 4 % of the scale’s capacity.
The addition of weighing scales capacity, preload and the total zero setting
range give the required capacity for the weighing cell.
To avoid overloading of the weighing cell, include an additional safety
margin.
• Smallest desired display division
KFS-T-BA_IA-e-1213 45
12.3 How to connect the platform
Disconnect the display unit from the power supply.
Weld the individual wires of the load cell cable to the printed circuit board.
Please see diagram below for plug allocation.
46 KFS-T-BA_IA-e-1213
and so on
12.4 Configuring display devices Navigation in the menu:
Call up menu
Switch-on balance and during the selftest press .
To call the firm menu item , press and hold for approx.
5-6 seconds until Func followed by F0 iSn appears.
Release button.
How to select menu
items
With help of , the individual menu items can be
selected one after the other.
KFS-T-BA_IA-e-1213 47
to the menu.
Change settings Confirm selected menu item such as F2 dm by pressing
and the current setting will be displayed.
Change setting in selected menu item by pressing .
Confirm setting
Reject setting
Return to weighing
mode
Confirm required setting with and the appliance returns
Press , the unit will return to the menu
Press back to weighing mode several times.
48 KFS-T-BA_IA-e-1213
Menu block
Main menu
Menu item
sub menu
Configuration menu overview:
Available settings / explanation
F0 iSn
F 1 Grv
F2 dm
-
-
Display internal resolution
Not documented
Single-range balance
Confirm with , then the following menu items can be
selected by .
dESC Position decimal point available selection
0, 0.0, 0.00, 0.000, 0.0000, 0.00000
inC inC 1 Readability
inC 2
selectable 1, 2, 5, 10, 20, 50
inC 5
inC 10
inC 20
inC 50
CAP Balance capacity (max)
Adjust weighing system according to configuration.
CAL nonLin Adjustment, see chap. 6.5
LinEAr For linearisation see chapter 6.6
KFS-T-BA_IA-e-1213 49
Dual range balance
Confirm with , then the following menu items can be
selected by .
dESC Position decimal point available
selection 0, 0.0, 0.00, 0.000, 0.0000,
0.00000
inC div 1 inC 1 Readability for
inC 2
inC 5
1. Weighing range
Selectable 1, 2, 5, 10, 20,
50
inC 10
inC 20
inC 50
div 2 inC 1 Readability for
inC 2
inC 5
2. Weighing range
Selectable 1, 2, 5, 10, 20,
50
inC 10
CAP CAP 1 Balance capacity (Max) 1st weighing
Adjust weighing system after configuration.
CAL nonLin Adjustment, see chap. 6.5
inC 20
inC 50
range
CAP 2 Balance capacity (Max) 2nd weighing
range
LinEAr For linearisation see chapter 6.6
50 KFS-T-BA_IA-e-1213
Multi-interval balance
Confirm by , after that the following menu items are
available.
Position decimal point available
selection 0, 0.0, 0.00, 0.000, 0.0000
inC div 1 inC 5 Readability for
inC 5�
inC 5�
1. Weighing range
Selectable 1, 2, 5, 10, 20,
50
inC 10�
inC 20�
inC 50�
div 2 inC 1� Readability for
inC 2�
inC 5�
2. Weighing range
Selectable 1, 2, 5, 10, 20,
50
inC 10�
inC 20�
inC 50�
CAP CAP 1 Balance capacity (Max) 1st weighing
range
CAP 2 Balance capacity (Max) 2nd weighing
range
Adjust weighing system according to configuration.
CAL nonLin Adjustment, see chap. 6.5
LinEAr Linearisation see chap. 6.6
KFS-T-BA_IA-e-1213 51
KERN & Sohn GmbH
D-72322 Balingen-Frommern
E-Mail: info@kern-sohn.de
Tel: 0049-[0]7433- 9933-0
Internet: www.kern-sohn.de
D
Konformitätserklärung
Wir erklären hiermit, dass das Produkt, auf das sich diese Erklärung bezieht,
mit den nachstehenden Normen übereinstimmt.
GB
Declaration of
conformity
We hereby declare that the product to which this declaration refers conforms
with the following standards.
CZ
Prohlášení o
shode
Tímto prohlašujeme, že výrobek, kterého se toto prohlášení týká, je v souladu
s níže uvedenými normami.
E
Declaración de
conformidad
Manifestamos en la presente que el producto al que se refiere esta
declaración está de acuerdo con las normas siguientes
F
Déclaration de
conformité
Nous déclarons avec cela responsabilité que le produit, auquel se rapporte la
présente déclaration, est conforme aux normes citées ci-après.
I
Dichiarazione di
conformità
Dichiariamo con ciò che il prodotto al quale la presente dichiarazione si
riferisce è conforme alle norme di seguito citate.
NL
Conformiteitverklaring
Wij verklaren hiermede dat het product, waarop deze verklaring betrekking
heeft, met de hierna vermelde normen overeenstemt.
P
Declaração de
conformidade
Declaramos por meio da presente que o produto no qual se refere esta
declaração, corresponde às normas seguintes.
PL
Deklaracja
zgodności
Niniejszym oświadczamy, że produkt, którego niniejsze oświadczenie dotyczy,
jest zgodny z poniższymi normami.
RUS
Заявление о
соответствии
Мы заявляем, что продукт, к которому относится данная декларация,
соответствует перечисленным ниже нормам.
EU Directive
Standards
2004/108/EC
EN55022: 2006 A1:2007
EN55024: 1998+A1:2001+A2:2003
2006/95/EC
EN 60950-1:2006
EN 60065:2002+A1:2006
2005/32/EC
Date: 18.07.2011
Signature:
KERN & Sohn GmbH
Management
KERN & Sohn GmbH, Ziegelei 1, D-72336 Balingen, Tel. +49-[0]7433/9933-0
Fax +49-[0]7433/9933-149, E-Mail: info@kern-sohn.com, Internet: www.kern-sohn.com
13 Declaration of conformity
Postbox 4052
Fax: 0049-[0]7433-9933-149
Declaration of conformity
EG-Konformitätserklärung EC-Declaration of -Conformity
EC-
Déclaration de conformité EC-Declaración de Conformidad
EC-Dichiarazione di conformità EC-Conformiteitverklaring
EC- Declaração de conformidade EC- Prohlášení o shode
EC-Deklaracja zgodności EC-Заявление о соответствии
Electronic Balan ce: KERN KFS-T;BFS;IFS
EN61000-3-3:1955+A1:2001+A2:2005
52 KFS-T-BA_IA-e-1213
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