I'm wondering if anyone knows the accuracy of measuring uA current with a cheep (~25$) DMM? I need to measure some low power circuits (10-500uA) and I'm deciding whether I should get an analog uA meter or use my DMM.
My guess is that the DMM will not be very reliable? I can test it with a dummy resistor load and attempt to verify with a scope I suppose.
Accuracy I'm looking for: good question, I would ask the same. within 2.5% is good enough, what I want to try to avoid is disturbing the circuit...
Also The op-amp + shunt idea is one I had, I wanted to get peoples opinions first before I invested the time into that.