Amps per Volt Calibration

I’m trying to set up the amps_per_volt parameter but it just gives me inf when attempting to change it. What I’m doing is measuring the current while the motor is armed and entering that value in. Do i have to disarm to enter that value ? I don’t see how doing that would work though. I read somewhere about disabling a parameter that would allow changes while armed but I can’t seem to find any such thing.

Yeah, I’m also looking for this. I want to know how to properly do a amps per volt calibration on qgroundcontrol.
I wonder if the measurement has to be at full throttle or at idle throttle.

A lot easier, and accurate enough, to use the consumption logged vs. consumption charged with a simple ratio applied to the amps/volt parameter.