KERN MWN Series User manual

KERN & Sohn GmbH
Ziegelei 1
72336 Balingen-Frommern
Germany
+0049-[0]7433-9933-0
+0049-[0]7433-9933-149
[email protected]
Operating instructions
Wheelchair scales
KERN
MWN
TMWN 300K-1M-A
Version 1.1
2022-12
GB
TMWN_A-BAPS-e-2211

2 TMWN_A-BAPS-e-2211
D
Weitere Sprachversionen finden Sie online unter www.kern-sohn.com/manuals
E
Más versiones de idiomas se encuentran online bajo www.kern-sohn.com/manuals
F
Vous trouverez d’autres versions de langue online sous www.kern-sohn.com/manuals
GB
Further language versions you will find online under www.kern-sohn.com/manuals
I
Trovate altre versioni di lingue online su www.kern-sohn.com/manuals
PL
Inne wersje językowe znajdą Państwo na stronie www.kern-sohn.com/manuals

TMWN_A-BAPS-e-2211 3
GB
KERN TMWN
Version 1.1 2022-12
Operating instructions
Wheelchair scales
Contents
1Technical data ............................................................................................ 5
2Declaration of conformity.......................................................................... 6
3Appliance overview.................................................................................... 7
3.1 Overview of displays.............................................................................................. 8
3.2 Keyboard overview ................................................................................................ 9
4Basic Information (General) .................................................................... 10
4.1 Proper use............................................................................................................10
4.2 Non-intended product use / contraindications .......................................................11
4.3 Warranty...............................................................................................................11
4.4 Monitoring of Test Resources ...............................................................................12
4.5 Plausibility check...................................................................................................12
5Basic Safety Precautions ........................................................................ 13
5.1 Pay attention to the instructions in the Operation Manual......................................13
5.2 Preparation for use ...............................................................................................13
7Transport and storage ............................................................................. 14
7.1 Testing upon acceptance......................................................................................14
7.2 Packaging / return transport..................................................................................14
8Unpacking, Installation and Commissioning......................................... 15
8.1 Installation Site, Location of Use...........................................................................15
8.2 Unpacking.............................................................................................................15
8.3 Scope of delivery ..................................................................................................15
8.4 Placing..................................................................................................................15
8.5 Magnets display unit.............................................................................................17
8.5.1 Transportation of the balance .............................................................................................. 17
8.6 Battery operation...................................................................................................18
8.8 Rechargeable battery operation using an optional battery power pack..................20
8.9 Mains connection..................................................................................................21
8.10 Initial Commissioning............................................................................................21
9Operation .................................................................................................. 22
9.1 Weighing...............................................................................................................22
9.2 Taring ...................................................................................................................23
9.2.1 Subsequent tare weight ....................................................................................................... 24
9.2.2 Pretare.................................................................................................................................. 24
9.3 HOLD function......................................................................................................26
9.3.1 Calculating Body Mass Index............................................................................................... 27
9.3.2 Classification of BMI values................................................................................................. 27
9.4 Automatic switch-off function „AUTO OFF“ ...........................................................28
9.5 Acoustic signal when pressing button ...................................................................30
9.6 Setting time and date............................................................................................31

4 TMWN_A-BAPS-e-2211
10 Menu.......................................................................................................... 32
10.1 Navigation in the menu .........................................................................................32
10.2 Menu overview......................................................................................................33
11 Communication with peripheral devices via KUP connection............. 35
11.1 KERN Communications Protocol (KERN Interface Protocol).................................36
11.2 Data output after pressing the PRINT button < manual >......................................36
11.3 Automatic data output < auto>..............................................................................37
11.4 Continuous data output < cont > ...........................................................................38
11.5 Data format...........................................................................................................39
11.6 WLAN...................................................................................................................40
11.7 Print function.........................................................................................................41
12 Bluetooth .................................................................................................. 42
13 Alibi memory optional.............................................................................. 42
14 Servicing, maintenance, disposal........................................................... 43
14.1 Cleaning / disinfecting...........................................................................................43
14.2 Sterilisation...........................................................................................................43
14.3 Servicing, maintenance.........................................................................................43
14.4 Disposal................................................................................................................43
15 Error messages........................................................................................ 44
16 Instant help for troubleshooting............................................................. 45
17 Adjustment ............................................................................................... 46

TMWN_A-BAPS-e-2211 5
1 Technical data
KERN
MWN 300K-1M
Item no./ Type
TMWN 300K-1M-A
Weighing range (max)
300kg
Minimum load (Min)
2 kg
Readability (d)
0.1 kg
Linearity
0.1 kg
Display
LCD with 25mm high digits
Recommended adjustment weight,
(Category)
300 kg (M1)
Stabilization time (typical)
3 sec.
Warm-up time
10 min
Operating temperature
10° C …. + 40° C
Storage and transportation
environment
-20 to +60°C, and 30% to 90% relative humidity
Humidity of air
max. 80 % (not condensing)
Atmospheric pressure (kPa)
70kpa-106kpa
Input Voltage
6 V / 1 A
Battery use
6 x 1.5 V AA
Battery working range:
48 hours backgroud illumination off
24 hours background illumination on
Loading time: 8 hours
Auto Off
after 3, 5, 15, 30 min without load change (adjustable)
Dimensions fully mounted (W x D x
H) mm
1155 x 830 x 65
Weighing plate mm
910 x 740
Weight kg (net)
28.6
Rechargeable battery operation
optional; 3.8 VDC –4.2 VDC / 3700 mAh
Data interface
Internal: Wi-Fi
Optional / External:
KUP (RS232, Bluetooth, USB-D, Extension box)

6 TMWN_A-BAPS-e-2211
2 Declaration of conformity
The current EC/EU Conformity declaration can be found online in:
www.kern-sohn.com/ce

TMWN_A-BAPS-e-2211 7
3 Appliance overview
1. Weighing pan
2. Hand grip
3. Display Unit
4. Rechargeable battery
compartment
5. Mains connection
6. KUP

8 TMWN_A-BAPS-e-2211
3.1 Overview of displays
Display
Designation
Description
Stability display
Scales are in a steady state
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
Battery symbol
Shows the charging capacity of the
batteries
kg
Weighing unit
Displays the weighing unit
WiFi-interface
Shows the connection to the cableless
network

TMWN_A-BAPS-e-2211 9
3.2 Keyboard overview
Button
Designation
Function
ON/OFF button
Turn on/off
HOLD button
Hold function/Calculation of a stable weight value
In menu:
•Select menu items
For numeric entry:
•Lowering numeric value
BMI button
Calculation of the Body Mass Index
In menu:
•Return to weighing mode
Print button
Data transfer via interface
In menu:
•Select menu items
For numeric entry:
•Increase numerical value
Function key
Function quick key
Quick call-up of a function stored before
Zeroing key
Weighing scale will be reset to „0.0“
In menu:
•Confirm selection
For numeric entry:
•Change decimal digit
•Confirm entry
TARE key
Tare balance

10 TMWN_A-BAPS-e-2211
4 Basic Information (General)
4.1 Proper use
This weighing scale is designed for determining the weight of a person whilst
standing or sitting, according to the model.
Concerning this balance, the person to be weighed should step onto the centre of the
weighing platform and remain standing without moving, or when weighing on wheel
chair, the wheel chair must be pushed entirely onto the weighing platform resp. an
electrical wheel chair has to move independently and the wheels must be fastened
for the weighing process.
As soon as a stable weighing value is reached, the weighing value can be read.
The weighing scale is designed for continuous duty.
The weighing platform may only be stepped on by persons
capable of standing on both feet on the weighing platform or who
can sit quietly (chair scales and wheelchair scales).
The weighing platform or the foot rests are fitted with an anti-slip surface that must
not be removed or covered during weighing a person.
The balance should be checked for correct condition prior to each utilisation by a
person familiar with proper operation of the balance.
The WIFI interface allows a wireless transfer of the measurement results to a PC.
Scales fitted with a serial interface may only be connected to
appliances in compliance with Directive EN60601-1.
If the balance doesn’t have any contact with the transfer cable,
do not touch the transfer port in order to avoid an ESD-failure.

TMWN_A-BAPS-e-2211 11
4.2 Non-intended product use / contraindications
•Do not use these scales for dynamic weighing processes.
•Do not leave permanent load on the weighing pan. This
may damage the measuring system.
•Impacts and overload exceeding the stated maximum load
(max) of the weighing plate, minus a possibly existing tare
load, must be strictly avoided. This could cause damage to
the balance.
•Never operate the balance in explosive environment. The
serial version is not explosion protected. It should be
noted that a flammable mixture of anaesthetics and
oxygen or laughing gas may occur.
•The structure of the balance may not be modified. This
may lead to incorrect weighing results, safety-related
faults and destruction of the balance.
•The balance may only be used according to the described
conditions. Other areas of use must be released by KERN
in writing.
•If the balance is not used for a longer time, take out the
batteries and store them separately. Leaking battery liquid
could damage the balance.
•The balance may only be used for weighing persons.
Persons who are heavier than the indicated maximum
load, may not step onto the balance.
4.3 Warranty
Warranty claims shall be voided in case:
•Our conditions in the operation manual are ignored
•The appliance is used beyond the described uses
•The appliance is modified or opened
•Mechanical damage and damage caused by media, liquids
•Natural wear and tear
•The appliance is improperly set up or incorrectly electrically connected
•The measuring system is overloaded
•Dropping the balance

12 TMWN_A-BAPS-e-2211
4.4 Monitoring of Test Resources
In the framework of quality assurance the measuring-related weighing properties of
the balance 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 balance test substances and the test weights required for this. In
KERN’s accredited DKD calibration laboratory test weights and balances may be
calibrated (return to the national standard) fast and at moderate cost.
4.5 Plausibility check
Please make sure that the measurement values computed by the appliance are
plausible and are allocated to the respective person, before storing and using the
values for further purposes. This applies especially also for values transferred via
interface.

TMWN_A-BAPS-e-2211 13
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.
5.2 Preparation for use
•Check the balance for damage before any use
•Maintenance and re-verification
The balance must be serviced and re-verified at regular intervals.
•Do not use the appliance on slippery surfaces or in facilities with risk of
vibration
•During installation the balance must be levelled
•If possible, the product must remain in its original packaging for transportation
purpose. Should this not be possible, make sure that the product is protected
against damage
•Step onto and leave the personal balance only when a qualified person is
present

14 TMWN_A-BAPS-e-2211
7 Transport and storage
7.1 Testing upon acceptance
When receiving the appliance, please check packaging immediately, and the appliance
itself when unpacking for possible visible damage.
7.2 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 weighing plate, power supply unit etc.
against shifting and damage.

TMWN_A-BAPS-e-2211 15
8 Unpacking, Installation and Commissioning
8.1 Installation Site, Location of Use
The balances 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 balance.
On the installation site observe the following:
▪Place the balance 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 balance against direct draughts due to open windows and doors
▪Avoid jarring during weighing
▪Protect the balance against high humidity, vapours and dust
▪Do not expose the device 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 the balance and of the person to be weighed.
▪Avoid contact with water.
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.
8.2 Unpacking
Take the balance out of its packaging and place it at the intended position. When
using the power supply unit, ensure that the power cable does not produce a risk of
stumbling.
8.3 Scope of delivery
•Balance
•Mains adapter (in conformity with EN 60601-1)
•Protective hood
•Operating instructions
8.4 Placing
Remove the individual components of the balance or the complete balance from the
packaging with care and install at the intended location. When using the power
supply unit, ensure that the power cable does not produce a risk of stumbling.
Scope of delivery:

16 TMWN_A-BAPS-e-2211
Level balance with foot screws until the air bubble of the
water balance is in the prescribed circle.
Check levelling regularly-
Once installation is complete, check all screws for tight fit. Otherwise
the person to be weighed may suffer injury.
General instructions for installing the aforementioned balance
Install the personal balance at the intended location and align it using the screwed
height-adjustable rubber feet, until the air bubble of the bubble level (on the weighing
plate) is in the centre.
When installing or transporting balances with large and heavy platforms (weighing
plate folded upwards), ensure that the balance does not fall over or gets damaged.
When installing or transporting balances with large and heavy platforms
(weighing plate folded upwards), ensure that the balance does not fall
over or gets damaged.

TMWN_A-BAPS-e-2211 17
8.5 Magnets display unit
The display unit of the MWN has two magnets on the rear side, use these magnets to
fix the display unit on metallic surfaces.
8.5.1 Transportation of the balance
There exists the possibility to fix the display unit at the platform using the two
magnets on the rear side, whereby the balance and the display unit can be
transported together without problems (see fig. below).

18 TMWN_A-BAPS-e-2211
8.6 Battery operation
As an alternative for the rechargeable battery operation, the balance offers also the
possibility to be operated with 6x AA-batteries.
Open the battery cover (1) at the lower side of the display unit and insert the batteries
according to the example shown below. Lock again the battery compartment cover. If
the batteries are exhausted, the symbol and „Lo bAt“ is displayed on the
balance; replace the batteries. To save the battery, the balance switches
automatically off (see chap.9.4 Auto off).
+
Lo bAt
Capacity of batteries exhausted.
Capacity of batteries will soon be exhausted.
Batteries completely charged
Disclaimer:
Only use KERN type rechargeable battery YMR-01 (RC 193650) or batteries AA 1.5
V (6x). Other may cause damages to the product, which can lead to injuries of
persons
If the balance is not used for a longer time, take out the batteries and
store them separately. Leaking battery liquid could damage the balance.
Replacement for rechargeable battery by inadequately trained
personnel could result in a hazard

TMWN_A-BAPS-e-2211 19
Insert batteries
Remove the battery compartment cover
at the side of the display unit (1)
Remove the battery holder (2)
Insert the batteries into the battery
holder
Insert batteries with the battery holder
into the battery compartment and lock it
with battery compartment cover.

20 TMWN_A-BAPS-e-2211
8.8 Rechargeable battery operation using an optional battery power pack
Open the battery compartment cover (1) at the base of the display unit and insert the
rechargeable battery. Charge the rechargeable battery for at least 12 hours before
initial use.
The appearance of the symbol in the weight display indicates that the
rechargeable battery is almost exhausted. The weighing scale will remain ready for
operation for a few more minutes before switching off automatically in order to save
the rechargeable battery (see chap. 11.4 Auto off). Charge rechargeable battery.
Voltage has dropped below prescribed minimum.
Rechargeable battery very low.
Rechargeable battery completely recharged
•If the rechargeable battery is exhausted, „LobAt“ is displayed.
The rechargeable battery is charged via the provided plug-in
power supply unit (charging time 14 h for a complete charging).
•If the balance is not used for a longer time, take out the
rechargeable battery and store it separately. Leaking liquid
could damage the balance.