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outlet voltage & polarity, how do I check w/ my RS meter?

216.79.214.135

Posted by marc g. on July 20, 2000 at 14:57:08

I have a Radio Shack digital multi meter (forget the model) and I want to check the voltage on my outlets. I’ve done this before, but forgot how use the meter. I think it is supposed to be set to VAC then you put the red and black probes in the socket. When referring to the outlet, let’s assume I’m looking at it from the front where each outlet looks like this

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where the large slotted opening is on the left. Where do the red and black probes go?

I want to check the voltage to see how much fluctuation there is and how much it changes throughout the day as power demands change. I tried a PS Audio Power Plant and noted no difference at all. I’m wondering if it’s because the power in my area is fairly stable. If I were to take a reading out of the back of a Power Plant, should I get a rock steady reading of whatever voltage it’s supposed to be producing? 120volts? I’ll measure the one my friend has just for kicks.

I know the power fluctuates here at my office which is on a different power company from what I have at home so I’ll want to check the voltage here, for comparison purposes. I understand the voltage (here at work) is not particularly stable as we have to use light bulbs rated for 130 volts so they can withstand the surges we get here, which apparently don’t go over 130 volts.

While I’m busy asking questions, anyone care to explain how I do that deal where you take reading with the meter with a audio component plugged into the wall one way, then taking another reading after reversing polarity. I understand the way that offers the lowest reading to be the best way to leave it. Also, what is tweak/process this referred to as?

Thanks in advance!

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