Dynamite Passport Ultra voltmeter calibration - RC Groups
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Jul 05, 2012, 11:42 PM
Registered User

Dynamite Passport Ultra voltmeter calibration

I have a Dynamite Passport Ultra and just started using it for lipo batteries and when I try to balance the batteries, the read voltage is always too low by 30mv compared to the other cells i.e. I measured the voltage with a separate voltmeter of all the cells and the relative values which should stay the same were different (is that clear enough). Does anybody know how to fix this? I can't see anything in the software to calibrate the voltmeters is there a way to raise the voltage by 30mv with an external circuit? this is pretty annoying because I am unable to properly balance my batteries...

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Jul 07, 2012, 11:12 PM
Registered User
Jul 08, 2012, 12:00 AM
RC Helicopter Pilot
TheWoodCrafter's Avatar
So one cell always reads low?

You are sure it is the calibration of the charger and not the battery?
Jul 08, 2012, 12:06 AM
Registered User
Yes, i've tried with 3 different batteries and measured with a voltmeter while it was balancing and it showed the difference. the total voltage the charger displays is not equal to the 3 cell readings added together.
Jul 08, 2012, 12:16 AM
RC Helicopter Pilot
TheWoodCrafter's Avatar
I do not know where to get chargers repaired.

Someone should really start doing this.
Jul 08, 2012, 12:19 AM
Registered User
yeah otherwise, I was thinking I could use voltage dividers to lower the voltage of the other 2 cells, but i'm worries it might end up overcharging the batteries so having it 30mv unbalanced is probably better for them.

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