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You wish to measure AC mA. This involves putting a diode in series with the meter. A suitable shunt resistor can be from 2 to 5 % of the lowest ohm load you will attach.
This schematic will work if you're operating above 50VAC or so. It will not give linear readings at low ACV, due to the diode causing a problematic voltage drop.
To get linear readings when you're operating on low voltage AC, an op amp configuration will work.
May be helpful for You if you later need to measure AC mili Volts :
You can adjust Your 40uA for 1mA scale and use it in this circuit. Four diodes are germanium type, but if there is no germanium diode use four schotky diodes.
You can adjust Your 40uA for 1mA scale and use it in this circuit. Four diodes are germanium type, but if there is no germanium diode use four schotky diodes.
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