KERN KMA-TM User manual

KERN & Sohn GmbH
Ziegelei 1
D-72336 Balingen
E-Mail: [e-mail]
Phone: +49-[0]7433- 9933-0
Fax: +49-[0]7433-9933-149
Internet: www.kern-sohn.com
Operating and Installation
Instructions
Display Unit
KERN KMA-TM
Version 1.0
05/2013
GB
KMA-TM-BA_IA-e-1310

2 KMA-TM-BA_IA-e-1310
GB
KERN KMA-TM
Version 1.0 05/2013
Operating and installation instructions
Display unit
Contents
1Technical data................................................................................................ 4
2Appliance overview ....................................................................................... 5
2.1 Overview of display.................................................................................................... 6
2.2 Keyboard overview .................................................................................................... 7
3Basic instructions.......................................................................................... 8
3.1 Proper use................................................................................................................. 8
3.2 Improper Use............................................................................................................. 8
3.3 Warranty.................................................................................................................... 8
3.4 Monitoring of Test Resources.................................................................................... 9
4Basic Safety Precautions.............................................................................. 9
4.1 Pay attention to the instructions in the Operation Manual .......................................... 9
4.2 Personnel training...................................................................................................... 9
5Transport and storage................................................................................... 9
5.1 Testing upon acceptance........................................................................................... 9
5.2 Packaging / return transport....................................................................................... 9
6Unpacking, Setup and Commissioning ..................................................... 10
6.1 Place of installation / place of operation....................................................................10
6.2 Unpacking.................................................................................................................10
6.3 Scope of delivery......................................................................................................10
6.4 Mains connection......................................................................................................11
6.5 Rechargeable battery operation................................................................................12
6.6 Initial Commissioning................................................................................................12
7Operation...................................................................................................... 13
7.1 Start-up.....................................................................................................................13
7.2 Switching Off ............................................................................................................13
7.3 Zeroing .....................................................................................................................13
7.4 Weighing...................................................................................................................13
7.5 Taring .......................................................................................................................13
7.6 HOLD function..........................................................................................................14
7.7 See second decimal point (not verified value)...........................................................14
7.9 Calculation of the Body Mass Index..........................................................................15
7.9.1 Classification of BMI values ..................................................................................................... 15
7.10 Automatic switch-off function „AUTO OFF“...............................................................16
7.11 Display background illumination................................................................................17
8Error messages............................................................................................ 18
9Servicing, maintenance, disposal .............................................................. 18
9.1 Clean........................................................................................................................18
9.2 Servicing, maintenance.............................................................................................18
9.3 Disposal....................................................................................................................18

KMA-TM-BA_IA-e-1310 3
10 Instant help................................................................................................... 19
11 Installation display unit............................................................................... 20
11.1 Technical data ..........................................................................................................20
11.2 Weighing system design...........................................................................................20
11.3 How to connect the platform .....................................................................................21
11.4 Configure display unit ...............................................................................................22
11.4.1 Navigation in the menu ........................................................................................................ 22
11.4.2 Menu overview..................................................................................................................... 23
11.4.3 Carry out configuration......................................................................................................... 24
12 Verification................................................................................................... 27
13 Adjustment................................................................................................... 29
14 Declaration of Conformity / Test Certificate / Type Approval Certificate
Fehler! Textmarke nicht definiert.

4 KMA-TM-BA_IA-e-1310
1 Technical data
KERN KMA-TM
Display 5 ½ - digit
Resolution verified 6.000
Resolution not verified 30.000
Divisions 1,2,5,…10n
Verification class III
Weighing Units kg
Functions Data-Hold, BMI
Display LCD 25 mm digits with back lighting
DMS weighing cells 80-100 Ω. Max. 4 item per 350 Ω;
Sensitivity 2-3 mV/V
Range calibration We recommend ≥ 50 % max.
Electric Supply Input voltage 220 V – 240 V, 50 Hz
Power pack secondary voltage 12V, 500mA
Dimensions
(B x D x H) mm 195 x 118 x 83
Admissible
ambient temperature -10°C – 40°C
Net weight 1 kg
Medical product in
accordance with
93/42/EEC
Class I when using as weighing system KERN MCC or
KERN MPC

KMA-TM-BA_IA-e-1310 5
2 Appliance overview
1. Weight display
2. Battery charge status
3. Keyboard
4. Weighing unit
5. Adjustment switch
6. Terminal power supply unit
7. Connection connecting cable „display unit - loading cell"
8. Battery compartment

6 KMA-TM-BA_IA-e-1310
2.1 Overview of display
Display Description Description
STABLE Stability display Scales are in a steady state
ZERO Zeroing display Should the balance not display exactly
zero despite empty weighing plate, press
the button. Your balance will be set to
zero after a short standby time.
NET Net weight display Illuminated when net weight is displayed
Illuminated after weighing scale was tared
GROSS Gross weight display Illuminated when gross weight is displayed
HOLD HOLD function HOLD function active
BMI BMI function Illuminated while BMI function is enabled
Rechargeable battery
symbol
Lights when the voltage drops below the
prescribed minimum.
Lights when the rechargeable battery
capacity is almost exhausted.
Lights when the rechargeable battery is fully
charged.

KMA-TM-BA_IA-e-1310 7
2.2 Keyboard overview
Key Function
Tare balance
Weighing scale will be reset to „0.0“
For numeric entry:
•Change decimal place
In menu:
•Call up menu
•Select menu items
For numeric entry:
•Increase numerical value
Calculation of the Body Mass Index
In menu:
•Confirm selection
For numeric entry:
•Confirm numerical value
Data-Hold function
Turn on/off

8 KMA-TM-BA_IA-e-1310
3 Basic instructions
3.1 Proper use
The display unit acquired by you is used in combination with a load cell 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 weighing system 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 load cell. This may damage the measuring
system.
Impacts and overloading exceeding the stated maximum load (max) of the load cell,
minus a possibly existing tare load, must be strictly avoided. The load cell or 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
•Overload of the measuring system

KMA-TM-BA_IA-e-1310 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.
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 against shifting and damage.

10 KMA-TM-BA_IA-e-1310
6 Unpacking, Setup and Commissioning
6.1 Place of installation / place of operation
The display units are designed in a way that reliable weighing results are achieved in
common conditions of use.
You will work accurately and fast, if you select the right location for your weighing
system.
On the installation site observe the following:
The weighing system must be levelled.
Avoid extreme heat as well as temperature fluctuation caused by installing
next to a radiator or in the direct sunlight;
Protect the weighing system against direct draughts due to open windows and
doors;
Avoid jarring during weighing;
Protect the display unit against high humidity, vapours and dust;
Do not expose the display unit to extreme dampness for longer periods of time.
Non-permitted condensation (condensation of air humidity on the appliance) may
occur if a cold appliance is taken to a considerably warmer environment. In this
case, acclimatize the disconnected appliance for ca. 2 hours at room temperature.
Avoid static charge of goods to be weighed or weighing container.
Major display deviations (incorrect weighing results) may be experienced should
electromagnetic fields (e.g. due to mobile phones or radio equipment), static
electricity accumulations or instable power supply occur. Change location or remove
source of interference. .
6.2 Unpacking
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.
6.3 Scope of delivery
Display Unit
Mains adapter

Operating instructions

KMA-TM-BA_IA-e-1310 11
6.4 Mains connection
Terminal power supply unit
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.
The small sticker attached to the side of the display unit indicates the power port:
The LED remains illuminated as long as the weighing scale remains connected to the
mains.
The LED display provides information about the battery's charging status.
green: Rechargeable battery completely reloaded
blue: Charging storage battery

12 KMA-TM-BA_IA-e-1310
6.5 Rechargeable battery operation
Open the battery compartment cover at the base of the display unit and connect the
rechargeable battery pack.
Charge the battery for at least 12 hours before initial use.
The appearance of the symbol in the weight display indicates that the battery
packs is almost exhausted. The weighing scale will remain ready for operation for a
few more minutes before switching off in order to save battery. Charge the battery
pack.
Voltage has dropped below prescribed minimum.
Rechargeable battery very low.
Rechargeable battery completely reloaded
If the balance is not used for a longer time, take out the battery pack and store it
separately. Leaking liquid could damage the balance.
6.6 Initial Commissioning
In order to obtain exact results with the electronic balances, your balance must have
reached the operating temperature (see warming up time chap. During this warming
up time the balances must be connected to the power supply (mains, accumulator or
battery) and be switched on.
The accuracy of the balance depends on the local acceleration of gravity.
The value of gravity acceleration is shown on the type plate.

KMA-TM-BA_IA-e-1310 13
7 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
Press , zero display as well as indicator ZERO will appear.
7.4 Weighing
Place goods to be weighed on balance.
Wait until stability display STABLE appears.
Read weighing result.
7.5 Taring
Put tare load.
Press , zero display as well as indicator will appear.
(example)
Load balance.
Wait until the standstill display „STABLE“ appears, then read
the weighing result.
When the balance is unloaded the saved taring value is
displayed with negative sign.
The taring process can be repeated any number of times.
The limit is reached when the taring range capacity (see type
plate) is full.

To delete the tare value, remove load from balance and press
.

14 KMA-TM-BA_IA-e-1310
7.6 HOLD function
The balance has an integrated standstill function (mean value calculation). This
allows correct weighing determination of a person although the latter is not keeping
still on the seat surface.
Start balance by pressing .
Wait for stability display „STABLE to appear.
Press , in the display „---------“ will appear and the
„HOLD“ symbol appears.
Place goods to be weighed on balance. After standstill control
there sounds an acoustic signal, the weight value will be
displayed.
After unloading the balance, the weighing value remains
displayed for approx. 10 seconds, than the balance changes
automatically into the weighing mode.
The „HOLD“ symbol disappears.
7.7 See second decimal point (not verified value)
Press and hold for about 2 s whilst weighed result is being shown. The second
decimal place will be shown for approx. 5 s.

KMA-TM-BA_IA-e-1310 15
7.9 Calculation of the Body Mass Index
You need to know a person’s body height before you can calculate the BMI for that
person. This should be known.
Start balance by pressing
Place the person on the center of the weighing plate
Wait for stability display „STABLE to appear.
Press .
The most recently entered body height will be shown with the
enable digit flashing.
To enter body height, press the and key.
Confirm entered value with .
The weighing scale is now in BMI mode and the BMI symbol
will be appear and the kg display disappear.
The calculated BMI value will be displayed.
Return to weighing mode using
The BMI symbol will disappear and the kg display will
reappear.
•Reliable calculation of BMI is restricted to a body height of 100 cm to 200
cm and a weight of >10 kg.
•If weighing has to take place under unsteady conditions, you can be
stabilise the display by applying the Hold function.
7.9.1 Classification of BMI values
Weight classification for adults over 18 years of age using the BMI in accordance
with WHO, 2000 EK IV and WHO 2004.
Categorie BMI ( kg/m2) Risk of diseases associated with
overweight
Underweight
< 18.5
low
Normal weight
18.5 – 24.9
Average
Overweight
Pre-adipose
Adipose degree I
Adipose degree II
Adipose degree III
> 25.0
25.0 – 29.9
30.0 – 34.9
35.0 – 39.9
> 40
A bit high
Increased
High
Very high

16 KMA-TM-BA_IA-e-1310
7.10 Automatic switch-off function „AUTO OFF“

In weighing mode, press and the first function [F1 oFF]
will be displayed.
Press , the current setting will de displayed, e.g. [oFF
15]
Press repeatedly until the desired setting is displayed,
e.g. [oFF 30]
[oFF 0] AUTO-OFF function deactivated
[oFF 3] AUTO-OFF after 3 minutes without changing the weight
[oFF 5] AUTO-OFF after 5 minutes without changing the weight
[oFF 15] AUTO-OFF after 15 minutes without changing the weight
[oFF 30] AUTO-OFF after 30 minutes without changing the weight
Confirm with , [F1 oFF] will be displayed
Return to weighing mode using

KMA-TM-BA_IA-e-1310 17
7.11 Display background illumination


In weighing mode, press and the first function [F1 oFF]
will be displayed.
Press repeatedly until [F3 bk] is shown.
Press , the current setting will be displayed, e.g. [bL on]
To select the desired setting, press
Confirm with ,[F3 bk] will be displayed.
Return to weighing mode using
bL on Continuous background lighting
bL off Background illumination off
bL AU Automatic background illumination on when weighing surface is
loaded or key pressed.

18 KMA-TM-BA_IA-e-1310
8 Error messages
Display
Description
Zero range exceeded
(on start-up or when pressing the key)
•There is no weighing item on the load cell
•Overload during setting to zero
•Incorrect adjusting process
•Fault on load cell
Value outside the A/D converter range
•Damaged weighing cell
•Damaged electronics
Should other error messages occur, switch balance off and then on again. If the error
message remains inform manufacturer.
9 Servicing, maintenance, disposal
9.1 Clean
Before any maintenance, cleaning and repair work disconnect the
appliance from the operating voltage.
Do not use aggressive detergents (solvents or similar).
9.2 Servicing, maintenance
The appliance may only be opened by trained service technicians who are authorized
by KERN.
Disconnect the device from mains before opening.
9.3 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.

KMA-TM-BA_IA-e-1310 19
10 Instant help
In case of a fault in the program sequence, the balance should be shortly switched
off. The weighing process must then be restarted from the beginning.
Failure:
Possible causes:
The displayed weight
does not glow. The display unit is not switched on.
The mains supply connection has been interrupted
(mains cable not plugged in/faulty).
Power supply interrupted.
Rechargeable battery inserted incorrectly or empty.
No rechargeable battery inserted.
The displayed weight is
permanently changing Draught/air movement
Table/floor vibrations
The load cell has contact with foreign objects
Electromagnetic fields / static charging (choose
different location/switch off interfering device if
possible)
The weighing result is
obviously incorrect The display of the balance is not at zero.
Adjustment is no longer correct.
Great fluctuations in temperature.
Weighing system is not levelled.
Electromagnetic fields / static charging (choose
different location/switch off interfering device if
possible)
Should other error messages occur, switch balance off and then on again. If the
error message remains inform manufacturer.

20 KMA-TM-BA_IA-e-1310
11 Installation display unit
•Installation / configuration of a weighing system must be carried out by a
well acquainted specialist with the workings of weighing balances.
11.1 Technical data
Supply voltage: 5 V/150mA
Resistance parameter 80 - 100 Ω, max 4 items per 350 Ωload cell
11.2 Weighing system design
The display unit is suitable for connection to any analogue load cell in compliance
with the required specifications.
The following data must be established before selecting a load 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
•Verifiable, if required