KERN KDE-T User manual

KERN & Sohn GmbH
Ziegelei 1
D-72336 Balingen
E-Mail: [email protected]
Phone: +49-[0]7433- 9933-0
Fax: +49-[0]7433-9933-149
Internet: www.kern-sohn.com
Operating and Installation
Instructions Display Unit
KERN KDE-T
Version 1.0
12/2012
GB
KDE-T-BA_IA-e-1210

KDE-T-BA_IA-e-1210 2
GB
KERN KDE-T
Version 1.0 12/2012
Operating and installation instructions
Display unit
Contents
1Technical data................................................................................................ 4
2Appliance overview ....................................................................................... 5
2.1 Keyboard overview .................................................................................................... 6
3Basic Information (General).......................................................................... 7
3.1 Proper use................................................................................................................. 7
3.2 Improper Use............................................................................................................. 7
3.3 Warranty.................................................................................................................... 7
3.4 Monitoring of Test Resources.................................................................................... 8
4Basic Safety Precautions.............................................................................. 8
4.1 Pay attention to the instructions in the Operation Manual .......................................... 8
4.2 Personnel training...................................................................................................... 8
5Transport and storage................................................................................... 8
5.1 Testing upon acceptance........................................................................................... 8
5.2 Packaging / return transport....................................................................................... 8
6Unpacking and placing.................................................................................. 9
6.1 Installation Site, Location of Use................................................................................ 9
6.2 Scope of delivery / serial accessories:....................................................................... 9
6.3 Unpacking/installation...............................................................................................10
6.4 Mains connection......................................................................................................10
6.5 Operation using a rechargeable battery (optional) ....................................................10
6.6 Adjustment................................................................................................................11
6.7 Linearization .............................................................................................................12
6.7.1 Carry out linearization............................................................................................................... 13
7Basic Operation ........................................................................................... 14
7.1 Start-up.....................................................................................................................14
7.2 Switching Off ............................................................................................................14
7.3 Zeroing .....................................................................................................................14
7.4 Simple weighing........................................................................................................14
7.5Weighing with tare....................................................................................................15
7.6 Pre-Tare function......................................................................................................15
7.7 Plus/minus weighings ...............................................................................................16
7.8 Parts counting...........................................................................................................17
7.9 Net-total weighings ...................................................................................................18
7.10 Percent weighings ....................................................................................................20

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8Menu ............................................................................................................. 21
8.1 Navigation in the menu:............................................................................................21
8.2 Menu overview..........................................................................................................22
8.2.1 Weighing units (Unit)................................................................................................................ 23
8.2.2 Automatic zero correction (zero tracking)................................................................................. 25
8.2.3 Selection of adjustment weight................................................................................................. 26
8.2.4 Display background illumination............................................................................................... 27
8.2.5 Animal weighing function.......................................................................................................... 28
8.2.6 Foot switch ............................................................................................................................... 29
8.2.7 Reset to factory setting............................................................................................................. 30
8.3 Interface parameters.................................................................................................31
8.3.1 Data transfer mode................................................................................................................... 31
8.3.2 Selection printed edition........................................................................................................... 32
8.3.3 Baud rate.................................................................................................................................. 33
9Data output RS 232 C .................................................................................. 34
9.1 Technical data ..........................................................................................................34
9.2 Pin allocation of the balance output socket (front view).............................................34
9.3 Explanation of the data transfer................................................................................35
9.3.1 Pr PC........................................................................................................................................ 35
9.3.2 AU Pr....................................................................................................................................... 35
9.3.3 AU PC...................................................................................................................................... 35
9.3.4 rE Cr ........................................................................................................................................ 36
9.4 Output on bar code printer........................................................................................37
9.5 Printer mode.............................................................................................................37
10 Servicing, maintenance, disposal .............................................................. 38
10.1 Cleaning ...................................................................................................................38
10.2 Servicing, maintenance.............................................................................................38
10.3 Disposal....................................................................................................................38
11 Instant help................................................................................................... 39
12 Installing display unit / weighing bridge.................................................... 40
12.1 Technical data ..........................................................................................................40
12.2 Weighing system design...........................................................................................40
12.3 How to connect the platform .....................................................................................41
12.4 Configuring display devices ......................................................................................42
12.5 Service menu............................................................................................................44

KDE-T-BA_IA-e-1210 4
1 Technical data
KERN
KDE-T
KDE-TH
Resolution
20.000
35.000
Display
6-digit
Weighing Units
g, kg, lb, oz
Display
LCD 25 mm digits with back lighting
DMS weighing cells
87-1600
Sensitivity 2-3 mV/V
Range calibration
We recommend ≥ 50 % max.
Electric Supply
Input voltage 100 V –240 V, 50 / 60 Hz
Power unit secondary voltage 15 V, 600mA
Housing
225 x 110 x 45
Admissible
ambient temperature
5°C –35°C
Net weight
1.0 kg
Rechargeable battery
(optional)
Operating time backlight on 10 h
Operating time backlight off 15 h
Loading time 10 h
Data output
RS232

5 KDE-T-BA_IA-e-1210
2 Appliance overview
1. Display
2. Function keys
3. RS-232
4. Input connection load cell cable
5. Mains adapter connection

KDE-T-BA_IA-e-1210 6
2.1 Keyboard overview
Key
Function
Turn on/off
Calling menu items from menu
Call adjustment process (long key press)
Call piece counting and percentage calculation and return
to weighing mode (short key press)
Select menu items from menu and save your settings
Confirm the adjustment weight in the adjustment process
Menu access (longer pressing of the button)
Transfer weighing data via interface (short key press)
Taring
For plus/minus and net/total weighing:
Return to weighing mode

7 KDE-T-BA_IA-e-1210
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

KDE-T-BA_IA-e-1210 8
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.
All language versions contain a non-binding translation.
The original German is binding.
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.

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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:
Display Unit
Mains adapter
Protective cover
Operating instructions

KDE-T-BA_IA-e-1210 10
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.
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 Operation using a rechargeable battery (optional)
Lift-off the battery cover on the lower side of the balance. Connect 9 V compound
battery. Replace the battery compartment cover.
For battery operation the balance has an automatic switch-off function which can be
activated or deactivated in the menu.
Keep pressed in the weighing mode until “Unit” is displayed.
Press repeatedly until "AF" appears.
Acknowledge with .
Use now to select between the following two settings:
„AF on“:
In order to save the battery, the balance switches automatically
off after 3 minutes without weighing.
„AF off“:
Switch-off function deactivated.
Acknowledge selection by . The balance returns to weighing mode.

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6.6 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. 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.
How to carry out adjustment:
Start balance by pressing
ò
Press key and hold. “CAL” will appear briefly
followed by a flashing display of the value for an
adjustment weight
Here is an example of “30.000 kg”
(You can select the size of an adjustment weight in the
menu under menu item “CAL”.)
Place the adjustment weight in the centre of the
weighing plate and press to confirm.
“CAL F” will appear before the weighing scale changes to
weighing mode.
Adjustment has now been completed successfully.
An error during adjustment or the use of an incorrect adjusting weight will result
in an error message „CAL E“. Repeat adjustment.

KDE-T-BA_IA-e-1210 12
6.7 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 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 adjustment weight in steps 1 to 3 during linearization,
only increase it.
After successful linearisation you will have to carry out calibration;
see chapter “testing instruments control”.

13 KDE-T-BA_IA-e-1210
6.7.1 Carry out linearization
Set menu item “CAL” in service menu (chap. 12.5). Afterward proceed as follows:
ò
“F” will appear briefly before the weighing scale changes to
adjusting mode and “CAL” will be displayed.
Press , the value for the first weight will be
displayed.
Here is an example of “12.500 kg”
Put on first weight in the centre of the weighing pan
Press , the value for the first weight will be
displayed.
Here is an example of “25.000 kg”
Put on second weight in the centre of the weighing pan
Press , the value for the third weight will be
displayed.
Here is an example of “50.000 kg”
Put on third weight in the centre of the weighing pan
Press
“F” will appear briefly before the weighing scale turns itself off.
Linearization has now been completed successfully.
We recommend that you adjust the weighing scale after
linearization. (see chapter 6.6)
An adjusting error or incorrect adjusting weight will be indicated by the error
message; repeat adjustment procedure.

KDE-T-BA_IA-e-1210 14
7 Basic Operation
7.1 Start-up
Press , the appliance 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 , 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 appears.
7.4 Simple weighing
Place goods to be weighed on balance.
As soon as the unit is shown the weighing scale will be in a steady state.
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 “Error“, and an audio
sound. Unload weighing system or reduce preload.

15 KDE-T-BA_IA-e-1210
7.5 Weighing with tare
Deposit weighing vessel. After successful standstill control press the
button. The zero display appears. 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 Pre-Tare function
Setting the pre-tare function:
Using this function the weight of a tare vessel can be stored.
This value also remains saved if the balance meanwhile has been switched off and
switched on again.
Turn on weighing scale by and wait for zero to be displayed.
Put on empty vessel and press repeatedly until a flashing display of
“PrEtArE” appears.
Press . The current weight on the weighing pan will be saved as pre-tare
weight.
Weigh the material, the net weight will be indicated.

KDE-T-BA_IA-e-1210 16
Turning off pre-tare function:
Unload weighing pan and press to set to zero
Press repeatedly until „PrETArE“ is displayed flashing
Press to delete the saved pre-tare value.
7.7 Plus/minus weighings
For example unit weight control, fabrication control etc.
Turn on weighing scale by and wait for zero to be displayed.
Put desired weight on weighing pan
(example)
Press to tare and “0.0000 kg” will be displayed
Remove desired weight and the desired weight will be shown as negative value
Put the test objects subsequently on the weighing plate, the respective deviation
from the nominal weight is displayed with the respective sign to „+“ and „-“.
According to the same procedure also packages with the same weight can be
produced, referring to a nominal weight.
Back to weighing mode by pressing the button.

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7.8 Parts 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.
The average piece weight can only be determined by stable weighing
values.
If weighing values are under zero, the piece counter display shows a
negative number of items.
Reset balance to zero or tare the empty weighing container if necessary.
Press to show a flashing display of reference number of pieces “5 PCS”
Press to select further reference numbers of pieces
(example)
Place as many parts to count on the weighing plate as the set reference quantity
requires.
Press to confirm the selected reference number of pieces and the display
will stop flashing.
The balance is now in parts counting mode and counts all units on the weighing
plate.
The larger the reference quantity, the more accurate the parts
counting.
Pressing will return the weighing scale to weighing mode and show the weight
for all the pieces counted.
Printout example:
P 2pcs

KDE-T-BA_IA-e-1210 18
7.9 Net-total weighings
It is useful if a mixture of several components is weighed into a tare vessel and finally
the sum weight of all weighed components is necessary for control purposes (net-
total, i.e. the weight of the tare vessel).
Example:
Turn on weighing scale and wait for zero to be displayed.
Put on empty vessel
and use to tare to “0.0000 kg”.
Weigh in component 1 ( 2 kg)
and use to tare to “0.0000 kg”.
The memory function is shown by the symbol on the left side of the screen.
Weigh in component 2 ( 0.5 kg)
Press and the total weight (2.5 kg) following from component 1 and
component 2 will be shown.
Press and the weighing scale moves to “0.0000 kg”. The memory symbol
reappears.

19 KDE-T-BA_IA-e-1210
Weigh in component 3 ( 5 kg)
Press and the total weight (7.5 kg) following from component 1, component
2 and component 3 will be shown.
Follow the same sequence of operations for additional components.
Back to weighing mode by pressing the button.

KDE-T-BA_IA-e-1210 20
7.10 Percent weighings
Percent weighing allows to display weight in percent, in relation to a reference
weight.
Turn on weighing scale by and wait for zero to be displayed.
Press repeatedly until a flashing display of “100.0 %” appears. First the
reference numbers of pieces of the counting function appear, followed by “100.0
%”.
Place the reference object on the weighing plate
Press and the weight of the substance will be imported as reference
(100%). The display stops flashing.
Remove reference object
Put test specimen on the weighing pan and the percentage in relation to the
reference weight will be displayed.
(example)
Press to return weighing scale to weighing mode and the weight of the test
specimen will be displayed.
(example)