Thread: New Product ESR / IR Meter fo Lipos
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Old Jun 13, 2011, 02:44 PM
Wayne Giles is online now
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Rugby, UK
Joined Feb 2007
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Originally Posted by like2fly! View Post
Iíve got two packs for one of my EDF jets.

I was about to connect one of the packs and noticed that the bullet-wire joint felt a little wobbly. (The leads are too long with little room for them in the fuse, they are cramped. I will shorten them)

Using your IR meter I quickly confirmed my suspicion. The cells IRís were normal on both 4s packs, one packs total IR was about 19 mohms, the other was about 40! Time to re-solder! Glad I didnít just fly and deal with it later. I have the IR meter in my flight box ready.
Glad to hear it is useful. Although intended to measure cells and packs, I found a "Deans" with a contact resistance of 35milliohms a week or so ago which turned out to be just a smear of dirt on one blade!
The meter also sorted a problem with a club members' ducted fan model which kept surging for no apparent reason. Cell voltages all looked OK but it turned out that 2 cells were about 6 milliohms and one was 38milliohms!

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