KERN KXS-TM User manual

Operating and Installation
Instructions - Display Unit
KERN KXS-TM / KXG-TM
Type KXS-TNM / KXG-TNM
Version 3.0

2 KXS_KXG-TM-BA_IA-e-1730
GB
KERN KXS-TM / KXG-TM
Version 3.0 2017-05
Operating and installation instructions
Display unit
Contents
1Technical data................................................................................................ 4
1.1 Dimensions ................................................................................................................................. 5
1.2 Connections ................................................................................................................................ 6
2Declaration of conformity ............................................................................. 7
4Appliance overview ....................................................................................... 8
4.1 Keyboard overview ..................................................................................................................... 9
4.2 Overview of display .................................................................................................................. 11
4.3 Overview display icons ............................................................................................................. 12
5Basic Information (General)........................................................................ 13
5.1 Proper use ................................................................................................................................ 13
5.2 Improper Use ............................................................................................................................ 13
5.3 Warranty ................................................................................................................................... 13
5.4 Monitoring of Test Resources .................................................................................................. 14
6Basic Safety Precautions............................................................................ 14
6.1 Pay attention to the instructions in the Operation Manual........................................................ 14
6.2 Personnel training ..................................................................................................................... 14
7Transport and storage................................................................................. 14
7.1 Testing upon acceptance ......................................................................................................... 14
7.2 Packaging / return transport ..................................................................................................... 14
8Unpacking and placing................................................................................ 15
8.1 Installation Site, Location of Use .............................................................................................. 15
8.2 Unpacking ................................................................................................................................. 15
8.3 Scope of delivery / serial accessories ...................................................................................... 15
8.4 Transport Securing ................................................................................................................... 16
8.5 Placing ...................................................................................................................................... 16
8.6 Rechargeable battery operation (Factory option) ..................................................................... 16
8.7 Adjustment ................................................................................................................................ 17
8.7.1 Verified weighing systems: ....................................................................................................... 17
8.7.2 Not verifiable weighing systems ............................................................................................... 19
8.8 Linearization ............................................................................................................................. 20
8.9 Verification ................................................................................................................................ 22

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9Basic Operation ........................................................................................... 24
9.1 Start-up ..................................................................................................................................... 24
9.2 Switching Off ............................................................................................................................ 24
9.3 Zeroing ..................................................................................................................................... 24
9.4 Simple weighing ....................................................................................................................... 24
9.5 Switch-over weighing unit (only not verifiable weighing systems) ........................................... 25
9.6 Weighing with tare .................................................................................................................... 26
9.6.1 Taring........................................................................................................................................ 26
9.6.2 Numerical input of tare (PRE-TARE) ........................................................................................ 26
9.7 Display gross / net .................................................................................................................... 27
10 General functions ........................................................................................ 28
10.1 Automatic shutdown function ................................................................................................... 28
10.2 Display background illumination ............................................................................................... 29
11 Operation Modes.......................................................................................... 30
11.1 Parts counting ........................................................................................................................... 30
11.2 Manual totalizing ....................................................................................................................... 32
11.3 Automatic adding-up ................................................................................................................. 35
11.4 Data-Hold functions .................................................................................................................. 36
11.4.1 Animal weighing function ..................................................................................................... 37
11.5 Weighing with tolerance range ................................................................................................. 39
11.5.1 Tolerance check for target weight ........................................................................................ 40
11.5.2 Tolerance check for target quantity ...................................................................................... 43
12 Menu ............................................................................................................. 46
12.1 Overview non-verified weighing systems (Adjustment switch in position <Adj>) .................... 47
12.2 Overview verified weighing systems (Adjustment switch in position <Lock>) .......................... 51
13 RS 485 – pin allocation................................................................................ 52
14 RS 232C........................................................................................................ 53
14.1 Pin allocation ............................................................................................................................ 53
14.2 Printer operation / sample logs ................................................................................................. 54
14.3 Output log (continuous output) ................................................................................................. 55
14.4 Remote control instructions ...................................................................................................... 55
15 Bluetooth (Factory option).......................................................................... 56
16 Installing display unit / weighing bridge.................................................... 60
16.1 Technical data .......................................................................................................................... 60
16.2 Weighing system design........................................................................................................... 60
16.3 How to connect the platform ..................................................................................................... 61
16.4 Configure display unit ............................................................................................................... 62
16.4.1 Configuration example single range scale ........................................................................... 63
16.4.2 Configuration example dual range scale .............................................................................. 64

4 KXS_KXG-TM-BA_IA-e-1730
1 Technical data
KERN (Type) KXS-TNM KXG-TNM
Trademark KXS-TM KXG-TM
Display 6-digit
Resolution verifiable Single (Max.) 10,000 e
Dual (Max.) 5,000 e
Resolution non-verifiable 30,000 d
Verification class III
Weighing ranges 2
Weighing units g, kg
Divisions 1,2,5,…10, n
Display LCD 55 mm digits with back lighting
DMS weighing cells Max. 8 x 350 Ω
Electric Supply Input voltage 110 - 230 V AC
Built-in power supply unit
Rechargeable battery
optional
Factory option
6 V, 4.5 Ah
Operating time (backlight on) 40 h
Operating time (backlight off) 80 h
Loading time 12 h
Admissible
ambient temperature -10°C – 40°C
Humidity of air < 85 % relative (not condensing)
Net weight 2,500 g 2,000 g
Housing material Stainlees steel Synthetic material
Dimensions Width x Depth
x Height,
(mm)
232 x 170 x 80
Interfaces
Factory option
RS232:
KXS-A04
RS485:
KXS-A01
Bluetooth:
KXS-A02

KXS_KXG-TM-BA_IA-e-1730 5
1.1 Dimensions
 KXS-TNM
 KXG-TNM

6 KXS_KXG-TM-BA_IA-e-1730
1.2 Connections
KXS-TNM
Standard Factory option
1
Electric Supply
4
Electric Supply
2
Load cell
5
Foot switch or RS 485
3
RS232
6
Pressure compensation membrane
7
RS232
8
Load cell
KXG-TNM
1
RS232
4
Foot switch
2
Load cell
5
RS232
3
Electric Supply
6
RS485
7
Load cell
8
Electric Supply
Standard Factory option

8 KXS_KXG-TM-BA_IA-e-1730
3 Appliance overview
Exemplified in image KXS-TNM
1. Weight display
2. Wireless
3. Status of rechargeable battery
4. Locking screw
5. Keyboard
6. Support base/Wall fixture

KXS_KXG-TM-BA_IA-e-1730 9
3.1 Keyboard overview
Button Function Designation
• Turn on/off ON/OFF button
• Zeroing ZERO key
Navigation button • Confirm entry
• Taring TARE button
Navigation button 
• At numeric input increase flashing digit
• Scroll forward in menu
• Display sum total MR key
Navigation button  • Digit selection to the right
• Weight value in summation memory
Add M+ button
Navigation button  • Digit selection to the left
• Calculate weighing data via interface PRINT button
C • Delete

10 KXS_KXG-TM-BA_IA-e-1730
• Switch over gross weight  net weight
• Switch-over weighing unit BG/ NET key
ESC • Back to menu/weighing mode
• Call up mean value function
• Call up weighing with tolerance range
• Delete total added memory
• To show an additional decimal place,
press and hold the M+ key for approx.
three seconds. This decimal place will
return to hidden when the key is
released.

KXS_KXG-TM-BA_IA-e-1730 11
3.2 Overview of display
HI / OK / LOIndicators for weighing with tolerance range
Kg Current selected unit of weight „kilograms“
Lb Current selected unit of weight „pound“
Pcs Parts counting
% Percent weighing
Zero indicator
Net The displayed weighing value is a net weighing value
Status of rechargeable battery
Indicator [

] next to symbol displays:

1
that the weight value is stable
GROSS

2 that the displayed weighing value is a gross weight value
HOLD

3that the indicated weight value is held in the display, until it is
deleted.
PRE-
TARE

4 that a PRE-TARE value is stored
W1

5 that weighing range 1 is enabled
W2

6 that weighing range 2 is enabled
M+
7
that data are stored in a summation memory

12 KXS_KXG-TM-BA_IA-e-1730
3.3 Overview display icons

KXS_KXG-TM-BA_IA-e-1730 13
4 Basic Information (General)
4.1 Proper use
The display unit acquired by you is used in combination with a weighing plate and
serves to determine the weighing value of material to be weighed. It is intended to be
used as a “non-automatic weighing system”, i.e. the material to be weighed is
manually and carefully placed in the center of the weighing plate. As soon as a stable
weighing value is reached the weighing value can be read.
4.2 Improper Use
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.
4.3 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

14 KXS_KXG-TM-BA_IA-e-1730
4.4 Monitoring of Test Resources
In the framework of quality assurance the measuring-related properties of the display
unit and, if applicable, the testing weight, must be checked regularly. The
responsible user must define a suitable interval as well as type and scope of this
test. In KERN’s accredited DKD calibration laboratory test weights and display
units may be calibrated (return to the national standard) fast and at moderate cost.
5 Basic Safety Precautions
5.1 Pay attention to the instructions in the Operation Manual
Carefully read this operation manual before setup and
commissioning, even if you are already familiar with KERN balances.
All language versions contain a non-binding translation.
The original German is binding.
5.2 Personnel training
The appliance may only be operated and maintained by trained personnel.
6 Transport and storage
6.1 Testing upon acceptance
When receiving the appliance, please check packaging immediately, and the
appliance itself when unpacking for possible visible damage.
6.2 Packaging / return transport
Keep all parts of the original packaging for a possibly
required return.
Only use original packaging for returning.
Prior to dispatch disconnect all cables and remove
loose/mobile parts.
Reattach possibly supplied transport securing devices.
Secure all parts such as the glass wind screen, the
weighing platform, power unit etc. against shifting and
damage.

KXS_KXG-TM-BA_IA-e-1730 15
7 Unpacking and placing
7.1 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 weighing platform on a firm, level surface;
• Avoid extreme heat as well as temperature fluctuation caused by installing
next to a radiator or in the direct sunlight;
• Protect the 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.
7.2 Unpacking
Carefully remove the display unit from packaging, remove plastic cover and place it
in the designated work area.
and place it in the designated work area.
7.3 Scope of delivery / serial accessories
• Display Unit
• Support base incl. wall bracket
• Operating manual

16 KXS_KXG-TM-BA_IA-e-1730
7.4 Transport Securing
Please note: if the display unit is used together with platform with transportation lock,
this transportation lock must be released prior to use.
Remove the transportation safety device at the four marked positions:
Transport Securing
7.5 Placing
Mount the display unit in a way that facilitates operation and where it is easy to see.
In order to raise the display, the display unit can be mounted on an optional
stand.
7.6 Rechargeable battery operation (Factory option)
Charge the internal rechargeable battery for at least 12 hours before initial use.
The battery symbol indicates the current charge level of the batteries.
A flashing icon indicates that the rechargeable battery is getting weak. The
weighing scale will remain ready for operation for a few more hours before switching
off in order to save battery. Recharge the battery completely before your next restart.

KXS_KXG-TM-BA_IA-e-1730 17
7.7 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.
•Prepare the required adjustment weight. The adjustment weight to be
used depends on the capacity of the weighing system. Carry out
adjustment as near as possible to the weighing system’s maximum
weight.
•
Observe stable environmental conditions. Stabilisation requires a certain
warm-up time.
7.7.1 Verified weighing systems:
•In verified weighing systems menu item <P3CAL> will be locked.
To undo the lock, you have to break the seal and open the casing. Turn
adjustment switch SWA1 on the printed circuit board to position “ADJ“
(See chap. 7.9).
Invoke menu item <P3CAL  CAL> (see chap. 11.1)
To confirm, press and the current setting will be shown.
noLin = Adjustment
LineAr = Linearisation

18 KXS_KXG-TM-BA_IA-e-1730
 For adjustment press to select setting < noLin> and confirm by .
 Ensure that there are no objects on the weighing pan.
Wait for stability display, then press .
The currently set adjustment weight will be displayed.
 Either apply the displayed adjustment weight or make changes with the help of
the navigation keys (see chap. 3.1). Confirm by , „LoAd“ will be shown.
 Carefully place adjustment 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 adjustment
weight during selftest, balance will return into weighing mode automatically.

KXS_KXG-TM-BA_IA-e-1730 19
7.7.2 Not verifiable weighing systems
 For invoking menu item <P6ZCL> see chap. 11.1.
 Ensure that there are no objects on the weighing pan before pressing .
 Wait for stability display, then press .
The currently set adjustment weight will be displayed.
 Either apply the displayed adjustment weight or make changes with the help of
the navigation keys (See chap.3.1). Confirm by , „LoAd“ will be shown.
 Carefully place adjustment 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 adjustment
weight during selftest, balance will return into weighing mode automatically.

20 KXS_KXG-TM-BA_IA-e-1730
7.8 Linearisation
Linearity shows the greatest deviation of a weight display on the scale to the value of
the respective test weight according to plus and minus over the entire weighing
range. If linearity deviation is discovered during a monitoring of test resources, you
can improve this by means of linearization.
• In balances with a resolution of > 15 000 dividing steps carrying out a
linearisation is recommended.
• 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 “Monitoring of test equipment”.
• Observe stable environmental conditions. Stabilisation requires a
certain warm-up time.
• After successful linearisation you will have to carry out calibration;
see chapter “Monitoring of test equipment”.
• In verified weighing systems menu item <P3CAL> will be locked.
To undo the lock, you have to break the seal and open the casing.
Turn adjustment switch SWA1 on the printed circuit board to position
“ADJ“ (See chap. 7.9).
 Invoke menu item <P3CAL  CAL> (see chap. 11.1)
 To confirm, press and the current setting will be shown.
noLin = Adjustment
LineAr = Linearisation
,

KXS_KXG-TM-BA_IA-e-1730 21
 For linearization press to select setting < LinEr>, to confirm, press .
 Ensure that there are no objects on the weighing pan.
Wait for stability display, then press .
 When “Ld 1“ is displayed, put the first adjustment weight (1/3 max) carefully in the
centre of the weighing platform. Wait for stability display, then press .
 When “Ld 2“ is displayed, put the second adjustment weight (2/3 max) carefully in
the centre of the weighing platform. Wait for stability display, then press .
 When “Ld 3“ is displayed, put the third adjustment weight (max) carefully in the
centre of the weighing platform. Wait for stability display, then press .
After the adjustment the balance will carry out a self-test.
 Remove adjustment weight during selftest, balance will return into weighing
mode automatically.