KERN MTA 400K-1NM Service Manual

Medical stand assist scales

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Service Manual
Medical Stand assist scales
KERN MTA_NM
Type MTA 400K-1NM
07/2018
GB
KERN & Sohn GmbH
Ziegelei 1
D-72336 Balingen
E-Mail: info@kern-sohn.com
Tel: +49-[0]7433- 9933-0
Fax: +49-[0]7433-9933-149
Internet: www.kern-sohn.com
MTA_NM -SH-e-1810

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Summary of Contents for KERN MTA 400K-1NM

  • Page 1 KERN & Sohn GmbH Ziegelei 1 Tel: +49-[0]7433- 9933-0 D-72336 Balingen Fax: +49-[0]7433-9933-149 E-Mail: info@kern-sohn.com Internet: www.kern-sohn.com Service Manual Medical Stand assist scales KERN MTA_NM Type MTA 400K-1NM 07/2018 MTA_NM -SH-e-1810...
  • Page 2: Table Of Contents

    KERN MTA_NM Version 1.0 07/2018 Servicemanual Contents Basic Information................... 3 Appliance overview ..................4 Keyboard overview ..................6 Overview of display ........................7 Balance assembly and installation ..................... 7 Mains connection ........................7 Battery operation is possible by obtaining an optional battery power pack....... 8 Battery operation ........................
  • Page 3: Basic Information

    1 Basic Information The device must be repaired only by trained specialist staff or personnel with professional formation (such as a repair-specialist accredited by law concerning verification). The service manual is obligatory for repair work. After repair, original conditions of the device have to be restored. Only original spare parts should be used.
  • Page 4: Appliance Overview

    2 Appliance overview 1. Display Unit 2. Tripod 3. Railing 4. Bubble level 5. Weighing pan Secondary display at rear MTA_NM -SH-e-1810...
  • Page 5 Display unit at rear 5 Rechargeable battery / battery compartment 6 Mains port 7 RS 232 C 8 Adjustment switch MTA_NM -SH-e-1810...
  • Page 6: Keyboard Overview

    3 Keyboard overview Typ MTA 400K-1NM Button Designation Function ON/OFF button Turn on/off Hold function/Calculation of a stable weight value HOLD button Calculation of the Body Mass Index BMI key Data transfer via interface PRINT button In menu:  Confirm selection For numeric entry: ...
  • Page 7: Overview Of Display

    The stated voltage value must be the same as the local voltage. Always use genuine approved KERN power pack units as per EN 60601-1 directive. 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.
  • Page 8: Battery Operation Is Possible By Obtaining An Optional Battery Power Pack

    The LED display informs you during loading about the loading status of the rechargeable battery. green: Rechargeable battery is completely discharged blue: Charging rechargeable battery 3.4 Battery operation is possible by obtaining an optional battery power pack. Open the battery compartment cover (1) at the base of the display unit and insert the rechargeable battery.
  • Page 9: Insert Batteries

    3.6 Insert batteries Remove battery compartment cover Connect battery holder to housing contact acc. to illustration Insert battery holder Insert batteries into battery compartment and lock with battery compartment cover. MTA_NM -SH-e-1810...
  • Page 10: Menu

    4 Menu Access to service menu „tCH“ is locked in verified balances. To disable the access lock, destroy the seal and actuate the adjustment switch.For position of adjustment switch, see operating instructions corresponding to the device chap. 17. Attention: After destruction of the seal the weighing system must be re-verified by an authorised agency and a new verification wire/seal mark fitted before it can be reused for applications subject to verification.
  • Page 11: Menu Overview

    4.2 Menu overview Available settings / explanation Menu block Menu item Main menu Submenu oFF 0* Automatic shutdown off Automatic shutdown after 3 min oFF 3 Automatic cutout oFF 5 Automatic shutdown after 5 min Auto Off oFF 15 Automatic shutdown after 15 min oFF 30 Automatic shutdown after 30 min oFF*...
  • Page 12 3. Data output format (P Prt, P Auto, P Cont settings only) the currently set data output format will be shown after the baud rate was confirmed. Select desired format by confirm with Prt 0-3 Data output format, see operating instructions corresponding to the device chap.
  • Page 13 Adjustment, see chap. 17 Not documented tri* CoUnt Not documented rESEt Reset weighing scale to factory setting SEtGrA Not documented * default setting MTA_NM -SH-e-1810...
  • Page 14: Data Output Rs 232

     Use a suitable cable to connect the weighing balance to the interface of the printer. Faultless operation requires an adequate KERN interface cable.  Communication parameters (baud rate, bits and parity) of balance and printer must match.
  • Page 15: Verification

    6 Verification Self-destroying seal mark Cover Adjustment switch 6.1 Verification validity period (current status in G) Personal scales (including chair and wheelchair scales) in 4 year hospitals Personal scales, when not located in hospitals (for example, unlimited doctor's offices and nursing homes) Baby weighing scales and mechanical birth weight scales 4 year Bed scales...
  • Page 16: Adjustment

    1. Carry out adjustment as closely as possible to admissible maximum load of weighing scale. Information about test weights you will find in the internet under http://www.kern-sohn.com  Observe stable environmental conditions. For warm-up time required for stabilization see operating instructions corresponding to the device chap.
  • Page 17: Procedure

    7.1 Procedure:   In weighing mode, press repeatedly until [tCH] appears.  Press , [Pin] is displayed  Press one after the other, [P1 SPd] will appear  , „P2 CAL“ will be displayed Press   Operate adjustment switch; for position see chap.17 ...
  • Page 18 numerical value by  Confirm with , [LoAd] appears.  Place adjustment weight in the centre of the weighing pan  Wait until stability display „STABLE“ appears   Confirm with [PASS] is displayed.  The balance carries out a selftest, after that [Err19] will be displayed and a signal will sound.
  • Page 19: Maintenance

    8 MAINTENANCE 8.1 General If the scale does not operate properly, find out the problem as possible. Determine whether the problem is constant or alternate. Be aware that problems can be caused by mechanical or electrical influences. Check the following. ...
  • Page 20: Check The Load Cell

    8.4 Check the Load cell  Remove power from the system, and disconnect the PCB from the Load cell  Check the moisture, or foreign material inside.  Make sure all leads are connected and correctly.  Check load cell for proper input and output resistances Load Cell Connections Signal Green...
  • Page 21: Trouble Shooting

    8.6 Trouble Shooting Problems Possible cause Common Solutions Display is blank. Mains power is turned off. Check power is getting inside the scale and No self test Power supply faulty or not on/off switch is working. plugged. Internal battery is Verify the voltages, which is on the power not charged.
  • Page 22: Parts Replacement

    9 Parts Replacement 9.1 Replace load cell  Turn over the platform and loosen the four feet.  Loosen the screws on the load cell.  Remove the BJ04board.  Move the load cell line through the hole, Load cell 1and load cell 2 can be removed ...
  • Page 23: Replace The Mainboard

    9.2 Replace the mainboard  Remove the 9 screws.  Remove the battery switch , calibration switch,RS232 port line, colour cable,screws,then change the new main board MTA_NM -SH-e-1810...
  • Page 24: Drawing

    10 DRAWING MTA_NM -SH-e-1810...

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