KERN MWN Operating Instructions Manual

Wheelchair scales
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Operating instructions
Wheelchair scales
KERN MWN
TMWN 300K-1M-A
Version 1.4
2024-11
GB
KERN & Sohn GmbH
Ziegelei 1
72336 Balingen-Frommern
Germany
+0049-[0]7433-9933-0
+0049-[0]7433-9933-149
info@kern-sohn.com
TMWN_A-BA-e-2414

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  • Page 1 KERN & Sohn GmbH Ziegelei 1 +0049-[0]7433-9933-0 72336 Balingen-Frommern +0049-[0]7433-9933-149 Germany info@kern-sohn.com Operating instructions Wheelchair scales KERN MWN TMWN 300K-1M-A Version 1.4 2024-11 TMWN_A-BA-e-2414...
  • Page 2 Jiné jazykové verze najdete na stránkách www.kern-sohn.com/manuals Inne wersje językowe znajdą Państwo na stronie www.kern-sohn.com/manuals Övriga språkversioner finns här: www.kern-sohn.com/manuals A további nyelvi változatok a következő oldalon találhatók: www.kern-sohn.com/manuals Druge jezične verzije su dostupne na stranici: www.kern-sohn.com/manuals Andre sprkversjoner finnes det p www.kern-sohn.com/manuals TMWN_A-BA-e-2414...
  • Page 3: Table Of Contents

    KERN TMWN Version 1.4 2024-11 Operating instructions Wheelchair scales Contents Technical data .................... 5 Declaration of conformity ................6 Explanation of the graphic symbols for medical products ........6 Appliance overview ..................9 Overview of displays .....................10 Keyboard overview ....................11 Basic Information (General) ..............
  • Page 4 10.6 Setting time and date ....................42 Communication with peripheral devices via KUP connection ..... 43 11.1 KERN Communications Protocol (KERN Interface Protocol) .........44 11.2 Data output after pressing the PRINT button < manual > ........44 11.3 Automatic data output < auto>................45 11.4...
  • Page 5: Technical Data

    1 Technical data KERN MWN 300K-1M Item no./ Type TMWN 300K-1M-A Weighing range (max) 300 kg Minimum load (Min) 2 kg Readability (d) 0.1 kg Verification value (e) 0.1 kg ≤50 kg = 0,5 e Accuracy for first verification >50 kg-200 kg = 1 e >200 kg –...
  • Page 6: Declaration Of Conformity

    2 Declaration of conformity The current EC/EU Conformity declaration can be found online in: www.kern-sohn.com/ce For verified weighing scales (= weighing scales assessed for conformity) the declaration of conformity is included in the scope of delivery. Only these balances are medical products.
  • Page 7 “Please note operating instructions” “Observe operating instructions” “Observe operating instructions” Identification of manufacturer of medical product including address Kern & Sohn GmbH D–72336 Balingen,Germany www.kern-sohn.com “Electro-medical device“ with attachment for type B Device protection class II Dispose of old appliances separately from your household waste! Instead, take them to communal collection points.
  • Page 8 Display of supply voltage for scales with polarity display 6 V / 1 A Mains connection Sealing mark KERN SEAL Supply voltage direct current Information Level balance before use Electrostatically endangered structural components When installing or transporting balances with large...
  • Page 9: Appliance Overview

    3 Appliance overview 1. Weighing pan 2. Hand grip 3. Display Unit 4. Rechargeable battery compartment 5. Mains connection 6. KUP TMWN_A-BA-e-2414...
  • Page 10: Overview Of Displays

    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 button. Your balance will be set to zero after a short standby time. Net weight display Illuminated when net weight is displayed Illuminated after weighing scale was...
  • Page 11: Keyboard Overview

    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 •...
  • Page 12: Basic Information (General)

    4 Basic Information (General) Balances have to be verified for the purposes stated below in accordance with Directive 2014/31/EU. Article 1, paragraph 4. “Determination of mass in the practice of medicine that is, weighing patients for reasons of medical supervision during medical surveillance, examination and treatment.”...
  • Page 13: Non-Intended Product Use / Contraindications

    • 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.
  • Page 14: Warranty

    Information is available on KERN’s home page (www.kern-sohn.com) with regard to the monitoring of balance test equipment and the test weights required for this. In KERN’s accredited DKD calibration laboratory test weights and balances may be...
  • Page 15: Basic Safety Precautions

     Carefully read this operation manual before setup and commissioning, even if you are already familiar with KERN balances. 5.2 Personnel training The medical staff must apply and follow the operating instructions for proper use and care of the product.
  • Page 16: Electromagnetic Compatibility (Emc)

    Portable radiofrequency communication device (incl. periphery, antenna cable and external antennae) should be placed at a distance of at least 30 cm (12 inch) from each part of MWN including the cables admitted by the manufacturer. Otherwise the performance of the appliance could drop down.
  • Page 17: Electromagnetic Interferences

    By the same token the medical device may in some cases cause such disturbances in other devices. To eliminate problems of that kind, we recommend you to take one or several of the measures listed below: • Change the alignment or distance of the device to the source of EMI. •...
  • Page 18: Electromagnetic Noise Immunity

    6.3 Electromagnetic noise immunity Guidelines and manufacturer’s declaration - electromagnetic noise immunity The balancae is determined for the use in an electromagnetic environment, which complies with the requirements specified below. The customer or user of the medical electrical device must ensure that operation takes place in such an environment. Test for immunity to IEC 60601-1-2 Matching level...
  • Page 19 Guidelines and manufacturer’s declaration - electromagnetic noise immunity Distance Matching Test Strip Service Modulation Max. 60601-1-2 level Frequency (MHz) intensity Test level (V/m) Irradiation (MHz) (V/m) radio 380 –390 TETRA Pulse frequency modulation IEC61000-4-3 18 Hz (Test Specification for appendix 430 –470 GMRS port immunity...
  • Page 20: Crucial Features Of Performance

    6.3.1 Crucial features of performance The balance does not have any crucial features of performance as per IEC 60601-1. The system may be subject to interference by other devices even if these devices conform to current emission requirements as per CISPR. 6.4 Minimum distances Recommended safety distances between portable and mobile HF telecommunication devices and the medical device...
  • Page 21: Transport And Storage

    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.
  • Page 22: Unpacking, Installation And Commissioning

    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: ...
  • Page 23 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 balances 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 center.
  • Page 24: Magnets Display Unit

    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 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.
  • Page 25: Battery Operation

    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.
  • Page 26 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.
  • Page 27: Rechargeable Battery Operation Is Possible By Obtaining An Optional Battery Power Pack

    • Power is supplied by the external mains adapter which also serves to isolate the mains supply from the scale. The stated voltage value must be the same as the local voltage. • Only approved genuine KERN mains adapters may be used in compliance with Directive EN 60601-1. TMWN_A-BA-e-2414...
  • Page 28: Initial Commissioning

    The small sticker attached to the side of the display unit indicates the power port: If the symbol appears in the display, the rechargeable battery will soon be exhausted. Connect the power supply unit and charge the rechargeable battery. The flashing symbol informs you during charging about the charging status of the rechargeable battery.
  • Page 29: Menu

    9 Menu Access to service menu „x10“ is locked in verified balances. To disable the access lock, destroy the seal mark and actuate the adjustment switch. For position of adjustment switch, see chap. 18.1. Attention: After destruction of the seal mark the weighing system must be re- verified by an authorized agency and a new seal mark fitted before it can be reused for applications subject to verification.
  • Page 30: Menu Overview

    9.2 Menu overview Further levels / description Level 1 Level 2 Description of the Rs232 baud Communication  1200 Usb-d 2400 4800 9600 14400 19200 38400 57600 115200 128000 256000 7dbits data 8dbits None parity even 1sbit stop 2sbits none handsh protoc wlan...
  • Page 31 RS 232 interface* Print intfce Rs232 Data output USB interface* USB-d *Only in conjunction with KUP interface WiFi interface wifi On, off prmode trig manual Data output after pressing the PRINT button, see chap. 11.2 autopr On, off Automatic data output with stable and positive weight value s.
  • Page 32 BEEPER keys Acoustic signal Switch acoustic signal on/off when button is pressed Automatic switch-off function switched off Autoff Automatic The scale is switched off automatically after Switch-off function the time defined in the < Time > menu item mode in battery mode without load change or operation Automatic switch-off only on zero display Only0...
  • Page 33: Operation

    10 Operation 10.1 Weighing  Start balance by pressing The balance will carry out a self-test The balance is ready for operation as soon as the weight display “0.0 kg“ appears.  However, you can reset the weighing scale to zero by pressing the key.
  • Page 34: Taring

    10.2 Taring The tare weight of any preloads can be deducted by pressing a button so that the actual weight of the person is displayed in subsequent weighings.  Put an object (such as a rubber mat) on the weighing pan. (example) ...
  • Page 35: Subsequent Tare Weight

    10.2.1 Subsequent tare weight The balance can be tared several times successively. 10.2.2 Pretare The possibility exists to enter either a known pre-tare value via the keyboard or to store the weight of an object placed on the weighing plate as a pre-tare value. Store the weight of an object placed on the weighing plate, in this example a wheelchair: .
  • Page 36 Enter the pre-tare value manually via the keyboard:  Switch on the scales with [ON/OFF]. Wait for the stability display  Press and hold , the application menu is called up. "PtArE" appears automatically.  Confirm with , "PT" and "M1" flash on the display. ...
  • Page 37: Hold Function

    Delete pre-tare value: • With the weighing pan unloaded, press , the scale switches to zero display. • Press and hold until the application menu opens. Make the following setting: <Ptare  clear> (confirm with 10.3 HOLD function The balance has an integrated standstill function (mean value calculation). With this function it is possible to weigh people accurately even if they do not stand still on the weighing plate.
  • Page 38: Calculating Body Mass Index

    10.3.1 Calculating Body Mass Index For weighing with wheelchair as described above, first tare away the wheelchair.  Switch on the scale with  Wait for the stability display  Tare the wheelchair.  Press The last height entered is displayed in centimetres, the active digit flashes.
  • Page 39: Automatic Switch-Off Function „Auto Off

    10.4 Automatic switch-off function „AUTO OFF“ The weighing scale will switch off automatically after the allotted time as long as neither the display unit nor the weighing plate is operated. • Menu settings: [AutoFF] (see chap. 9)  In weighing mode press simultaneously, „SetuP“...
  • Page 40 To set a determined switch-off time, proceed as follows:  As described above, call-up the menu item „ModE“  Press , „tiME“ appears, acknowledge on , select the required setting by [2 min] Weighing system will be turned off after 2 min. [5 min] Weighing system will be turned off after 5 min.
  • Page 41: Signal Tone When Pressing Button

    10.5 Signal tone when pressing button The balance offers the possibility to switch off or on an acoustic signal by pressing the keys. • Menu settings: [bEEPEr]  [KEYS – on/oFF]  In menu call-up the menu item „bEEPEr“  Press „KEYS“...
  • Page 42: Setting Time And Date

    10.6 Setting time and date (only available with Real Time Clock) • Menu settings: [dAtiME] Setting date:  In menu call-up the menu item „dAtiME“  Press repeatedly until the prompt for entering the year appears „YY20xx“. Enter the current year with (example) and confirm by ...
  • Page 43: Communication With Peripheral Devices Via Kup Connection

    Issue may be made to a printer, PC or check displays. In reverse order, control orders and data inputs may be made via the connected devices. The balances of the TMPN series are equipped with a KUP connection (KERN Universal Port) as per standard.
  • Page 44: Kern Communications Protocol (Kern Interface Protocol)

    11.1 KERN Communications Protocol (KERN Interface Protocol) KCP is a standardized set of interface orders for KERN balances, which allows many parameters and device functions to be called up and controlled. KERN devices that have KCP can use it to connect easily to computers, industrial control systems and other digital systems.
  • Page 45: Automatic Data Output < Auto

    11.3 Automatic data output < auto> Data is output automatically without pressing the PRINT button as soon as the corresponding output condition is met, depending on the setting in the menu. Activate function and set output condition:  In the Setup menu, call up the menu setting < print > < prmode> < trig >...
  • Page 46: Data Format

    Sample log (KERN YKB-01N): The balances which have a serial interface, may only be connected to electrical office machines. 11.5 Data format  In Setup menu invoke the menu setting < Print PrMode  weight  gntprt > and confirm with button .
  • Page 47: Wlan

    Transmission frequency: 2412 - 2472 MHz  Maximum transmission performance: < 20dBm  Application log: KCP (KERN Communications Protocol):  Set up WIFI connections: 1. The balance creates a WIFI access point as soon as it has started up (WLAN symbol in the balance display appears).
  • Page 48: Print Function

    6. Close the website 7. Connect the computer to the selected network 8. Enter the IP / Port into the target software: 23 1.2 Print function After a correct connection of the software and the balance, the weighing data can be transferred using the button on the balance.
  • Page 49: Bluetooth

    2 Bluetooth The balance is optionally available with Bluetooth Low Energy (BLE) and will then be visible to Bluetooth Master devices using its serial number. To access this, please use an appropriate software program / app which supports Bluetooth Low Energy (BLE). Applications exclusively using Bluetooth Classic (BLC) will not work.
  • Page 50: Alibi Memory (Optional)

    MEMQID 15 20 → All data sets, which are stored from ID 15 to ID 20, are returned. The detailed description can be found in the KERN Communication Protocol manual, available in the Downloads tab on the home page of KERN (www.kern-sohn.com).
  • Page 51: Servicing, Maintenance, Disposal

    Sterilisation of the appliance not allowed. 4.3 Servicing, maintenance The appliance may only be opened by trained service technicians who are authorized by KERN. We recommend a regular safety-related technical check (STK). Disconnect scales from mains before opening. 4.4 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.
  • Page 52: Error Messages

    5 Error messages Display Description Battery capacity exhausted Battery capacity soon exhausted Zero setting range exceeded Zero setting range not achieved Adjustment error Load instable Underload Overload Should other error messages occur, switch balance off and then on again. If the error message remains inform manufacturer.
  • Page 53: Instant Help For Troubleshooting

    6 Instant help for troubleshooting In case of an error in the program process, briefly turn off the balance and disconnect from power supply. The weighing process must then be restarted from the beginning. Fault Possible cause The displayed weight does •...
  • Page 54: Verification

    7 Verification General: According to EU directive 2014/31/EU balances must be officially verified if they are used as follows (legally controlled area): a) For commercial transactions if the price of goods is determined by weighing. b) For the production of medicines in pharmacies as well as for analyses in the medical and pharmaceutical laboratory.
  • Page 55: Verification Validity Period (Current Status In D)

    7.1 Verification validity period (current status in D) Personal scales (including chair and wheelchair scales) in 4 years hospitals Personal balances, when not located in hospitals (for example, unlimited doctor's offices and nursing homes) Baby weighing scales and mechanical birth weight scales 4 years Bed scales 2 years...
  • Page 56: Adjustment

    1. Carry out adjustment as closely as possible to admissible maximum load of weighing scale. Info about test weights can be found on the Internet at: http://www.kern-sohn.com. Observe stable environmental conditions. •...
  • Page 57: Adjustment Switch And Seals

     Press again , „cALEXt“ is displayed. (should this not be displayed, press repeatedly until „cALEXt“ is displayed  Press , the required adjustment weight is shown  Acknowledge by , „Zero“ is shortly displayed: Ensure that there are no objects on the weighing plate. ...

This manual is also suitable for:

TmwnMwn 300k-1mTmwn 300k-1m-a

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