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INSTRUCTION / TROUBLESHOOTING MANUAL FOR MODEL A75MD

PAGE 12 OF 22

DATA LOG OPTION

OBTAINING LOG FROM UNIT

In order to review the data log files from the A75MD, you will

need  to  have  access  to  a  computer.    This  can  be  a  laptop

brought  down  into  the  mine,  or  a  computer  that  is  above

ground.  If you plan to bring the data above ground you will

need to bring an additional USB flash drive underground.  The

data  logging  will  continue  on  the  replacement  flash  drive.

The  disadvantage  to  this  is  that  the  log  will  become  split

making it harder to compare charge cycles.  Bringing a laptop

underground allows you to just copy the file over and put the
flash drive back into the charger.

Before  beginning  allow  the  charger  to  finish  the  current

charge cycle.  After the charge cycle is complete, disconnect

the  battery  and  wait  approximately  one  minute  for  the

charger to write the last charge cycle to the USB drive.  There

is  no  indication  that  the  file  has  been  written  so  be  sure  to

wait a full minute after the battery has been disconnected.

When  the  charger  has  finished  the  charge  cycle  and  the

battery  is  disconnected  you  may  remove  the  USB  flash  drive.

It is not necessary to remove AC power from the charger; the

USB compartment is isolated from the power system. Open the

USB access door with a #2 Philips screwdriver and remove the

USB flash drive.

If you are reading the USB drive underground, simply copy the

“LAMARCHE.CSV”  file and  paste  it  to  you  desktop. Do  not

delete  or  otherwise  alter  the  original  file.    After  the  file  has

been copied to the laptop immediately plug the USB drive back

into the charger and screw the access door closed.

If you are reading the USB drive above ground,

immediately replace the USB drive with another

USB drive that has been formatted for use with

the  A75MD. Some USB  drives come  with  file

management  and/or security  software  pre-

installed. You must format the drive to remove

these  options as  they  make  the  drive

incompatible  with  the  A75MD. Once  a  USB

drive has been successfully used in the A75MD,

it will not need to be formatted again.

Note: If you choose to use multiple USB drives,

the log will be spread across all of these drives;

Remove the USB flash drive

Open the USB access door with a #2 Philips

screwdriver

Copy the LAMARCHE.CSV file and paste it to your

desktop

Format the drive to remove pre-installed software

Summary of Contents for A75MD

Page 1: ...GER Digital Volt Amp Meter and Electronic Timer ECN DATE CPN 124710 21527 8 17 19536 5 12 106 BRADROCK DRIVE DES PLAINES IL 60018 1967 847 299 1188 FAX 847 299 3061 Instruction Drawing Number P25 LA75MD 1 Revision A01 Rev Date 08 17 ...

Page 2: ...llow a spark or flame in vicinity of a battery f Be extra cautious DO NOT drop metal onto a battery It might spark or short circuit the battery or cause an explosion g Remove personal metal items such as rings bracelets necklaces and watches when working with a battery A battery can produce a short circuit current high enough to weld these items causing severe burns h NEVER charge a frozen battery...

Page 3: ... the claim to La Marche Mfg may void warranty service for any physical damages reported for repair HANDLING WARNING Equipment can be very heavy and top heavy Use adequate manpower or equipment for handling Until the equipment is securely mounted care must be used to prevent the equipment from being accidentally tipped over NOMENCLATURE PLATES Each piece of La Marche Mfg Equipment shipped is identi...

Page 4: ... Constant Voltage override timer di dt monitoring in Phase 2 Constant Voltage stage dv dt monitoring in Phase 3 Finish Rate stage di dt dv dt charge shutoff Phase 3 Finish Rate 3 hr protection timer for standard charge Phase 3 Finish Rate 6 hr protection timer for equalize charge VFD Display Indicates amps volts amp hours elapsed time cooling time charge time Charger Status Ramp up Start Rate Cons...

Page 5: ...ight after the charger has successfully completed the autostart cycle and the AC contactor has closed Ramp Up Lamp This LED indicator will light after the charger starts and is in the Ramp Up stage Start Rate Lamp This LED indicator will light when the charger is charging at the Start Rate stage Constant Voltage Lamp This LED indicator will light when the charger is charging in the Constant Voltag...

Page 6: ...The automatic compensation eliminates charging problems that arise from a varying input line when charging continually or for two or three shift operations The unit is self protecting when subjected to abnormal overloading conditions It should not be necessary to make any adjustments to this charger Because of the stability of design the unit needs no periodic adjustment This along with the rugged...

Page 7: ...ge in the event that the 80 timing control does not terminate the charge before the maximum time limit of 12 hours is reached The Charger On light will turn off the Fault lamp will light and the display will indicate Override Timer If this occurs push and hold the STOP pushbutton until the Fault lamp illuminates solid red then release the STOP pushbutton The unit will reset and the lamp test will ...

Page 8: ... the flow of air through the vents is not obstructed A terminal block is provided within the unit for the AC input connections Before connecting the AC input cable check the line power with that specified on the nameplate of the unit Units with multiple AC input units have taps inside which must be set for the proper AC setting These taps are located on terminal blocks on the Power Transformers an...

Page 9: ...TING IN AMPS LOW AH HIGH AH 150 560 850 210 875 1200 270 1200 1500 360 1500 2000 2 Contactor Delay The delay on pulling in the contactor can be selected to be 5 or 20 seconds 3 Enable Logging YES or NO Enables or disables the optional data logging function 4 Reset RTC This function allows the user to reset the Real Time Clock Reset date is 01 01 2011 and the Reset time is 00 00 01 5 Date allows th...

Page 10: ...me to advance to the fourth digit and select it Press MODE again The charger will now start If an ID is not available press the MODE button four times to assign ID 0000 The charger will start Please see Data Logging Option section at the end of this manual for more information If a battery with the wrong number of cells is connected one of four messages will be displayed 1 High Battery The battery...

Page 11: ...p extinguishes I If for some reason the normal equalize or rate timers do not terminate the charge cycle in less than 12 hours the override timer will time out shut down the charger and the Fault lamp will illuminate The display will indicate Override Timer J If for some reason the unit output voltage exceeds 2 7 volts per cell for 20 sec an independent software shutdown will stop the charger The ...

Page 12: ...ycle and the battery is disconnected you may remove the USB flash drive It is not necessary to remove AC power from the charger the USB compartment is isolated from the power system Open the USB access door with a 2 Philips screwdriver and remove the USB flash drive If you are reading the USB drive underground simply copy the LAMARCHE CSV file and paste it to you desktop Do not delete or otherwise...

Page 13: ... It is written to the top of the log file to identify which charger each log belongs to Charge Count shows how many charge cycles the charger has gone through The charge count is independent of the battery and is tied to a particular charger The charge count will not reset even if a USB flash drive is removed it will increment even on new USB flash drives The charge count is almost like an odomete...

Page 14: ...erminate Time it is only the eight hours that the battery was actually under charge Charge Terminate Time similar to the start time stamp is simply the date and time that the battery was removed from the charger Cool Time is time elapsed from the end of the charge until the battery is disconnected or battery breaker is closed Using this data allows the customer to determine if the end user is lett...

Page 15: ...harge cycles 7 It is possible that no flash drive was present at the time of these charge cycles or these charge cycles have been written to another flash drive The charge count is stored in the internal memory of the charger and will increment regardless of USB status Charge Cycle 12 This is normal recharge cycle for a mostly depleted battery The battery charged for 8 hours 20 minutes before the ...

Page 16: ...low we will be adding charge cycles 4 6 that are on one flash drive to the rest of the data log on another flash drive Check to see how many charge cycles you will be adding In this example we will be adding four cycles between charge cycle 2 and charge cycle 7 Select the area under charge cycle 2 as shown above Notice that we are selecting four rows tall and enough columns wide to cover all of th...

Page 17: ... the of the log file as if it were never removed SETTINGS CSV file Below is an example of the file called SETTINGS CSV It contains information on all of the settings of the charger This file may be saved into the inserted flash drive by accessing the Customer Calibration Mode Scroll through the calibration menu until Write Settings File is displayed Select YES and wait for the file to be written L...

Page 18: ...INSTRUCTION TROUBLESHOOTING MANUAL FOR MODEL A75MD PAGE 18 OF 22 FLOW CHART ...

Page 19: ...T power transformer If fuse is good problem could be in the SCR Diode module SEE SCR SCR TROUBLESHOOTING GUIDE 5 Replace Plug and Play Assembly Problem Blown DC fuse 1 Make sure the correct type of fuse is being used 2 Check all connections to DC fuse to be certain they are tight 3 Check polarity of output cables and output connector 4 Check SCR SCR modules and diode SD4 for shorts SEE SCR SCR MOD...

Page 20: ...ly plugs 4 Measure the resistance from anode to cathode of each SCR This measurement should read as high resistance If the leads are reversed the measurement should also read as high resistance 5 Measure the resistance of the diode module from anode to cathode When forward biased resistance should read low when reverse biased resistance should read high 6 If the resistance readings do not match th...

Page 21: ...Maintenance Procedure Yearly 1 Blow out charger with a low pressure air hose 2 Make sure all connections are tight 3 Perform a visual check on all internal components 4 Check front panel meters for accuracy 5 Check magnetics components and wiring for signs of excessive heat ...

Page 22: ... purchaser elects not to return the equipment to the factory and wishes a factory service representative to make adjustments and or repairs at the equipment location La Marche s field service labor rates will apply A purchase order to cover the labor and transportation cost is required prior to the deployment of the service representative In accepting delivery of the equipment the purchaser assume...

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