Quote:
Originally Posted by wamnram
Without knowing what probe you have, I'll guess: Your probe is polarity sensitive, and since you said it has a digital display, when polarity is reversed it stays blank. Since it is single wire, there is no internal "switch" to allow the solid-state electronics to work on reverse polarity.
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Which takes me back to my initial question: Why does "polarity" matter??? You get 6.3V either positive ground or negative ground and Volts are Volts SO why does polarity matter??? Enough so that there is a "need" of an internal switch OR posed a different way, why does my multi meter read 6.3V when black is on negative and red is on positive and will read - 6.3V when black is to positive and red is to negative???