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Questions tagged [multimeter]

The tag has no usage guidance.

2
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0answers
45 views

Why do I measure 12VAC on old thermostat wires?

I'm installing a nest thermostat in my house - it's the UK version with a heatlink. I have successfully wired the heat link into my combi-boiler, disconnecting two existing wires in the process. I ...
0
votes
2answers
63 views

detect whether something is metal by touching it

I am doing things to my walls and can't tell whether I have pierced an electrical cable. My AC wire detecting studfinder seems unreliable. I have tried continuity tests via my multimeter between ...
1
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2answers
269 views

Troubleshooting Clamp Meter

I have a Mastech digital clamp meter and I can't for the life of me get it to display any reading other than 0. I was wondering if there are any tricks I'm simply not aware of? Here is what I have ...
0
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2answers
67 views

How to measure voltage AC using multi-meter

In the process of looking at why my doorbell is not working, I used a multi-meter to check Voltage AC. (I am very basic at electricals though). How would you check the voltage AC on a wire? Where ...
0
votes
2answers
675 views

How can I test a household LED light bulb?

Something is wrong with my GU10 base LED light bulb or with the light fixture but I don't know what's at fault. The fixture/bulb doesn't work and has never worked (new install). The fixture was ...
1
vote
3answers
2k views

What happens if I use the DC Voltage setting on an AC line? What about the reverse?

I have a run of those low voltage lighting systems in the hallway. The kind that have a two parallel exposed wires, with fixtures that clamp on in various spots on the wires and then take an MR16 bulb....
0
votes
4answers
77 views

Is there any reason testing the neutral line on a dimmer light socket wouldn't work?

I am repairing a vintage lamp and replacing the socket with a dimmer socket. When I do a continuity test on the old socket, both the hot and neutral lines work. That is, they make a high-pitch noise ...
1
vote
1answer
589 views

DIY AC Line Splitter

As a computer hardware enthusiast and a fresh DIY-er (just moved into my own house), I've purchased a digital clamp multimeter. Learned the hard way that in order to utilize the clamp to measure ...
1
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2answers
101 views

How can I measure the voltage of 40A transformer?

I need to power 10 meters of 5V LED strip, for which I bought a 40A transformer on AliExpress. Now, as much as I believe that cheap stuff bought from China can be okay quality, I'd like to make sure ...
0
votes
1answer
167 views

NCV meter beeping over large area of a wall

I use non contact voltage tester function of Uni-t ut210e for detecting main wires under/in walls. It worked pretty well until yesterday. The wall is made of bricks/mortar and some metal profiles (as ...
8
votes
3answers
2k views

Analog multimeter won't calibrate to zero

I have a multimeter that I haven't used in many years. I wanted to recalibrate it, so I touched the two probes and tried to adjust the reading to zero, but 500 ohms was as low as it would go. Is the ...
3
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2answers
4k views

How can I test a three-way switch to determine if it's working?

I have a light fixture in my house that suddenly stopped working. I tried replacing the lightbulb and still non luck so I decided to try and see if it was the three way light switch itself using a ...