[NSRCA-discussion] IR meter

[AtwoodDon at aol.com]

I agree, since I have to charge anyway, I am going to believe the  CellPro.  
I sold the IRM to someone that was unhappy they were sold out  when he went to 
order......  
 
D
 
 
In a message dated 3/29/2009 8:31:52 P.M. Pacific Daylight Time,  
joddino at socal.rr.com writes:

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_ (mailto: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_ (mailto: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_ 
(http://www.rcgroups.com/forums/showthread.php?t=980290) 

Chris 
 
 
 



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