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Discussion Starter · #1 ·
how is the best way to do this?
I have heard that a multimeter in series may not be accurate?
 

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An ideal multimeter has a 0V drop across the leads although any real multimeter adds some resistance in order to measure current (delta V across a low-valued resistor yields the current). Any multimeter worth >~$5 should only contribute negligible resistance when operated in current mode. For a critical measurement one could measure the voltage drop across the active multimeter with a second multimeter to confirm its performance.
 
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