negative and/or positive voltage reading.


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negative and/or positive voltage reading.

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yorled
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Mar 26, 2011, 12:27 PM

Post #1 of 3 (819 views)
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negative and/or positive voltage reading.	Can't Post

I have noticed that on PC power supply housing you would see the pins voltage marked as either negative(-) or positive(+). For a novice like me, how would i know when a voltage reading is either negative(-) or positive(+) OR what should i do to get either type of voltage reading ?
What causes one to get either type of voltage reading?
THANKS IN ADVANCE!!

yorled
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Apr 1, 2011, 12:28 AM

Post #2 of 3 (794 views)
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Re: [yorled] negative and/or positive voltage reading. [In reply to]	Can't Post

How would an analog meter depict negative voltages. For e.g., 2 ..,3...,5 vac/dc......just about any number!!

jts1957
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Apr 1, 2011, 1:36 AM

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Re: [yorled] negative and/or positive voltage reading. [In reply to]	Can't Post

Pointer on the Analog meter would swing towards the left hand "peg" when trying to measure negative DC voltages. Just reverse the meter leads. Don't forget to call it a "negative/minus" reading.

VAC - you would switch the "Function switch" to ACV - (there is no DC).

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