Measuring 5mV with a Multimeter That Has 200mV Lowest Range—Is It Accurate?

Hi,

I want to use the multimeter for 5-6 milli volt measure. it has a lowest range of 200mv. so can i use it to measure 5mv or am i missing something

200mv is the maximum value for that range so there is a good chance you can measure 5mv on that setting. When the voltages get low, there are lots of things that can significantly influence the accuracy of the measurement. Good (electrical and mechanical) contact with the source being measured and a high quality meter will help.

If your meter displays three or more digits, which all DMMs do, then you will see a result. If the reading is actually meaningful is another issue. You need to check your meter specs, there will be a percentage error, plus a count error, and possibly a temperature spec, it depends on the quality of the meter as to how much data is provided. You don't say if it is AC or DC, the DC specs are usually a better.
If you need an absolute value for the voltage, and you need to know how accurate the result is, then you can determine it from the specs.
A comparative measurement is simpler, if you just need to see how much a signal varies around 5mV, for example.
Cheers,
Richard

Got it. Thanks a lot