Lab Instrumentation — question 2 of 10
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You want to measure how much current a small 3.3V sensor board draws during normal operation. You put your DMM in series between the supply and the board, select the mA current range, and close the loop. The sensor board now resets randomly and its behavior looks glitchy. When you instead clip a clamp-on current probe around the same wire without breaking the circuit, the board runs perfectly fine and you read about 45 mA. What's going on, and how would you change your DMM-based measurement so it stops disturbing the circuit?