[NSRCA-discussion] IR meter

[James Oddino]

Don,

I would say the FMA is closer to the real value.  I'll look at some  
inflight data but just as a test of reasonableness I looked at the  
data I sent you recently where I was pulling about 98 Amps at 39  
volts.  My pack has about 3 mOhms per cell according to the FMA times  
10 cells is .03 Ohms for the pack.  98 x .03 = 2.94 volts  If the  
resistance was 7 times higher the drop would be seven times higher or  
around 21 volts.  Something is wrong with his algorithm.

Jim
On Mar 27, 2009, at 5:22 PM, atwooddon at aol.com wrote:

> I have one, caught the discussion thread just as it started and  
> jumped on the initial orders.  It works as expected. Although the IR  
> numbers are substantially higher than what the FMA charger reports  
> the relationship of the IR numbers between the cells is   
> proportionately the same.  The IRM shows IR ohms about 7-8 times  
> that of the FMA CellPro 10S.  Which one is right?  I dunno, but when  
> I asked why they were so different, I got a very long explanation  
> that I did not understand.  All I know is the ratios seem to stay  
> the same between them on the same batteries.
>
> It is well made tho I don't care for the small plugs for balance  
> taps, that is kinda clumsy, but it works as advertised.
>
> Don
>
> In a message dated 3/27/2009 11:55:58 A.M. Pacific Daylight Time, homeremodeling2003 at yahoo.com 
>  writes:
> Did you guys see this yet? Could be helpful if your charger doesn't  
> do it.
>
> http://www.rcgroups.com/forums/showthread.php?t=980290
>
> Chris
>
>
>
>
>
>
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