MP 1.2.53 Unable to Calibrate 3DR Power Module

On MP 1.2.53 I am unable to calibrate the 3DR Power module.

The opion to enter the "APM input Voltage" has dissapeared frrom the Battery Monitor configuration page.

This is giving me a battery voltage calced of 10.9 volts against 11.28 volt measured on an Agilent 1272A multimeter (DC accuracy of 0.05%).

 

The calibration proceedure used to be to measure the 5 volts at the fuse on the APM 2.5 board and enter this value into the "APM input voltage" Field. As per this Wiki page: http://copter.ardupilot.com/wiki/measuring-your-battery-voltage-and-current-consumption-with-apm/

Has the PM calibration been deliberately removed or is this a bug?

 

Note that I have updated MP from the Help page.

 

Cheers all, Roger...

 

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Replies

  • I had to calibrate both of my 3dr PM. It They were both reading 90 amp draw at idle and also 4-10 volts off from what the battery was at idle. 

    They work great now that they are calibrated.

  • Developer

    if you want to calibrate it, switch to custom.

  • 100KM

    +1 I've just installed the latest MP and still I can't fix my voltage reading.

    EDIT: From the GitHub: "The Power module is automatically calibrated. There is no longer any reason to do a manual calibration."

    I'm about 0.8 Vault out from my multimeter's reading - this affects mAh calcs etc.

    I think my problem comes from not using the power module as power supply - how now brown cow?

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