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How do I make voltage readings more stable?

A common problem is to forget to connect the low side of the dmm to Isrclo. This connection MUST be made on all dc and ac voltage readings. If this is not the problem, be sure that there are no wiring errors or intermittent cables. Finally, in an electrically noisy environment, it may be necessary to use longer integration times to cancel out 60 Hz noise. Use the "medium speed" or "low speed" measurement mode in the dmmMeasureDCV action in these cases.