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MicroPower MTM Technical Description

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Document no.
99-99-111
MTM
Technical description

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  • Page 1 Document no. 99-99-111 Technical description...
  • Page 2 Document no. Version Date Sign. 99-99-111 2003-10-16 ToNo 2 (30)

  • Page 3: Table Of Contents

    99-99-111 2003-10-16 ToNo CONTENTS INTRODUCTION About this description Installation and commissioning General information on MTM CHARGE CURVE The various phases of the charge curve Example of a charge curve and time settings Solution to sulphation Delayed start Extra charging READING AND EDITING DATA Menu system, overview.

  • Page 4: Introduction

    General information on MTM Charger type MTM is a fully automatic charger designed for charging all types of battery with a system voltage from 12 V up to the charger’s rated voltage, and with great variations on ampere-hours.

  • Page 5: Charge Curve

    ToNo 2 CHARGE CURVE The MTM is able to charge in accordance with a number of charge curves so as to suit any battery. A charge curve is often established by the battery manufacturer and consists of various elements, such as constant current, constant voltage, pause, etc., as well as the parameters, which control the various elements.
  • Page 6 Document no. Version Date Sign. 99-99-111 2003-10-16 ToNo measurements in order to ensure that correct recharging takes place. This charging phase is terminated if the max time or max Ah has been exceeded or if the current levels out or even rises (battery fault dI).

  • Page 7: Example Of A Charge Curve And Time Settings

    Document no. Version Date Sign. 99-99-111 2003-10-16 ToNo Example of a charge curve and time settings 7 (30)

  • Page 8: Solution To Sulphation

    U3 and current I3 to their normal values. Delayed start To be able to use off-peak electricity, the real-time clock in the MTM can be used to start charging at a time when power is cheap.

  • Page 9: Reading And Editing Data

    Document no. Version Date Sign. 99-99-111 2003-10-16 ToNo 3 READING AND EDITING DATA Menu system, overview. This is only an example. The menu system varies depending on the installed program version. 9 (30)

  • Page 10: Menu System Structure

    Document no. Version Date Sign. 99-99-111 2003-10-16 ToNo Menu system structure The menu is divided into groups of close functions and data as described in the overview in 3.1. Use the * button to select a group. A new group will be displayed every time you press the * key.

  • Page 11: Description Of The Menu Groups

    Document no. Version Date Sign. 99-99-111 2003-10-16 ToNo activated immediately if the security code (2451) is entered, as long as write protection has been disabled by entering 2451 in the first screen. Description of the menu groups This description is relevant for standard programs: additional functions may be implemented in other versions.

  • Page 12: Charging Algorithm

    Charging algorithm In this group, the parameters are programmed which produce a correct charge curve. The MTM charging program contains a number of charge curves which can be selected using the keyboard. The active curve is displayed in the menu header.

  • Page 13: Charger

    0.1 m . See also the table in section 5.1.  Bridge type Two types of thyristor bridges are used in MTM. Smaller chargers (up to 150A) usually have a 3-pulse bridge. Chargers with a nominal current of 175A and above usually have a 6-pulse bridge.

  • Page 14: Adjustment Of Measurement System

     Cycles nn%- nn%. The MTM saves statistics which indicate how much of the battery capacity has been used whenever it has been used, divided over 6 intervals. These intervals are set by means of the parameters “limit 1”...

  • Page 15: Service

     Hardware code Certain changes have been made to the MTM main pcb in order to enhance performance. The program has to take these changes into account. Hardware code 0 is used for version MK1128-03 and earlier, while hardware code 1 must be used for MK1128-04 and later.

  • Page 16: Servicing And Maintenance

    Document no. Version Date Sign. 99-99-111 2003-10-16 ToNo 4 SERVICING AND MAINTENANCE Main pcb Thyristor Thyristor active LED test Fuse 1,25A Power LED Testpoints Cooling- Pump/aux relays Contactor Relay Active Service plug Connection Function Power supply 170-260VAC Contactor control J3A-B Acid circulation pump output / Auxiliary relay output J4A-C Cooling fan power...

  • Page 17: Thyristor Control Pcb (6-Pulse Bridge Only)

    Document no. Version Date Sign. 99-99-111 2003-10-16 ToNo Thyristor control PCB (6-pulse bridge only) Thyristor active LED Connection Function Power supply for optional pcb (I/O-pcb, IDB-transceiver) Power supply from Main PCB Gate control signal from Main PCB Shunt Input/Output Thyristor gate output Power supply for IDB communication PCB I2C-bus I2C-bus...

  • Page 18: Processor C.b

    Document no. Version Date Sign. 99-99-111 2003-10-16 ToNo Processor c.b. E-prom Pin 1 Write protect jumpers Power LED 18 (30)

  • Page 19: Main Circuit

    Document no. Version Date Sign. 99-99-111 2003-10-16 ToNo Main circuit Incoming power is connected to terminals L1, L2 and L3. The voltage is fed through the main contactor K1 and chokes L1 – L3 to the primary side of transformers T1 – T3. Contactor K2 activates immediately before K1 and feeds the voltage through resistors R1 –...

  • Page 20: Adjustment Of Measured Values (Calibration)

    Document no. Version Date Sign. 99-99-111 2003-10-16 ToNo  Press * until the display shows “charger”. Press # and set the correct rated current, mains code, shunt and voltage code, as well as the cable resistance and the type of bridge (see the table in section 5.1.1).

  • Page 21: Troubleshooting

    Document no. Version Date Sign. 99-99-111 2003-10-16 ToNo  Press # until the display shows “charging current”. Read the charge current on the clip-on ammeter and enter this value with a decimal, followed by #.  Press # until the display shows “temperatures”. Press 0 followed by # and *. ...

  • Page 22: Error Messages In Alphabetical Order And Suggested Action

    Document no. Version Date Sign. 99-99-111 2003-10-16 ToNo 4.7.3 Error messages in alphabetical order and suggested action !CURR/VOLT-CODE The programmed value of shunt or voltage code is not valid. Measures: Check and reprogram the shunt or voltage code. Only if acid circulation is activated Requires hardware. ACID CIRC.
  • Page 23 Document no. Version Date Sign. 99-99-111 2003-10-16 ToNo Only if the function is activated in ”Control register 1” BATTERY FAULT dU The voltage is not increasing during the I1-phase. The I1- phase is terminated and the I2-phase is started. Possible causes: Warm battery. Faulty cell. Other battery problems.
  • Page 24 Document no. Version Date Sign. 99-99-111 2003-10-16 ToNo CHARGER FAULT U^ The output voltage is momentarily to high. The charging is temporarily terminated and restarts after a moment. Repeated errors causes the charger to shut off permanently. Possible causes: Bad connection between the charger and the battery.
  • Page 25 Document no. Version Date Sign. 99-99-111 2003-10-16 ToNo HIGH TEMPERATURE When the internal temperature of the charger is to high, the output power is decreased. This message is shown when the output power is 0. Possible causes: Faulty fan. Covered vent openings. A lot of dust inside the charger.
  • Page 26 Document no. Version Date Sign. 99-99-111 2003-10-16 ToNo LOW DC VOLTAGE The back voltage of the battery connected to the charger is lower than the programmed value in ”lower start limit”. Possible causes: The number of cells is to low. Wrong value in ”No.
  • Page 27 Document no. Version Date Sign. 99-99-111 2003-10-16 ToNo Only if acid circulation is activated. Requires hardware. OVER PRESSURE The air pressure is above the programmed value in ”Over pressure”. Possible causes: Folded air hose. Measures: Check air hoses. PHASE ERROR Phase is missing.
  • Page 28 Document no. Version Date Sign. 99-99-111 2003-10-16 ToNo TRANSD. ERR. PCB The signal from the temperature sensor on the main pcb is out of range. Possible causes: Faulty pcb. Measures: Replace the main pcb. U1-TIME EXCEEDED The maximum time of the U1-phase is exceeded. The U1-phase is terminated and the I2-phase is started.

  • Page 29: Appendices

    Document no. Version Date Sign. 99-99-111 2003-10-16 ToNo 5 APPENDICES Wiring diagrams, spares lists, program descriptions, etc. are gathered under this heading. The program version appears on a label stuck to the program circuit located in sockets on the computer card. Information on the program version installed can also be viewed in the first screen for the menu system.

  • Page 30: Hardware Code

    Document no. Version Date Sign. 99-99-111 2003-10-16 ToNo 5.1.2 Hardware code Description Hardware code Main PCB MK112801-MK112803 Main PCB MK112804 - 5.1.3 Charging algorithms Description Charging algorithm Freely ventilated lead cells, constant-voltage trickle charging LK 10-05 Freely ventilated lead cells, pulsed trickle charging LK 10-06 Freely ventilated lead cells with acid circulation.

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