I want to build a sensitive DC millivolt/microammeter using a 1mA zero-center panel meter and need to find the meter resistance for the calculations required for driving this meter.
I am familiar with the common method of measurement of a standard (zero-left) meter's resistance by driving it to full scale with a battery and a pot and then connecting another pot across the meter terminals, adjusting it for half-scale deflection, and then measuring that pot's resistance.
I searched the Web and all the handbooks and documents I could locate, but still can't find anything on zero-center meters.
What would be the procedure for a zero-center meter?
I am familiar with the common method of measurement of a standard (zero-left) meter's resistance by driving it to full scale with a battery and a pot and then connecting another pot across the meter terminals, adjusting it for half-scale deflection, and then measuring that pot's resistance.
I searched the Web and all the handbooks and documents I could locate, but still can't find anything on zero-center meters.
What would be the procedure for a zero-center meter?