- Sep 25, 2018
Overmind said:@Wolf I did not had a reliable way to do that. I was thinking of building my own device for IR measures, but then I got some Opuses so I guess that's a good start.
Yes at least you are aware or the implications of IR and that is good!!
There are several 4 wire solutions out there I personally use the YR1030 it is relatively reasonable US~$50.00.
Cherry67 has a great write up on a DIY version.
Ijust purchased a Fluke 8842A 5.5 Count Digital Multimeter Bench Top DMMto be absolutely sure of all the readings I am getting.
This meter is one of the standards in accuracy so I am looking forward to using it.
With the OPUS I'msure you know that the IR is horribly skewed and always at least 30m? high as per the manual and at least 10% to 20%off.
That can make a huge difference in how you sort and process cells.
At this time I am recording pretty much all cells to build an IR to capacity correlation database so I am testing cells with IR values that I would absolutely not use in my build. They would be in a lets see later binbut for the sake of the database I record them and after almost 1900 cells checked and recorded I am getting a good feel of what cells are good and which ones I should not even bother with. But again for the sake of the database I continue.
Happy cell hunting and get some way to measure true IR.