Can someone explain to me why a battery with a voltage of say 12.5 (measured at both the battery and at the green connector going into the logger) will show up as 12.2 or so on the CR23X battery voltage read. This is a problem for us as we have radios tied into if then statements based on battery voltage.
Thanks
Brian
I had to check with a co-worker who is out of town, but here is his reply:
I've had this question before and it is not exclusive to the CR23X. The answer is "diode".
The battery instruction in the CR23X is measuring the actual voltage to the mother board. This is a diode drop lower than the applied voltage. The diode is there for reverse voltage protection.
Hope this helps answer your question. Regards,
Dana
What is the exact voltage drop across the diode as we are experiencing a higher error than what the OP stated.
I believe that Diode drops are generally 0.7 Volts.
Dave