Topic | Can't measure 120v AC

Home Forums Mooshimeter Support Can't measure 120v AC

This topic contains 3 replies, has 2 voices, and was last updated by  ville 1 week, 1 day ago.

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  • #19991 Reply

    Docfxit
    Participant

    I am not seeing AC voltage. I have tested what looks like a fuse I test for continuity and I see .001k when it’s disconnected from the Mooshimeter. I have AC voltage selected and Manual 600V.
    Phone Screen

    The voltage you see in this image is floating. Do you have any idea why I can’t measure 120v AC?

    Thanks,
    Docfxit

  • #19992 Reply

    ville
    Participant

    You have samples set to manual 32. Auto offers 256.

    If i assume (60 Hz?) and calculate right, your settings let mooshimeter see about half of the sine wave you are measuring.

    If you set samples to automatic (or just 256) there would be almost 4 full waves to analyze per round. Should give better results then.

  • #19993 Reply

    Docfxit
    Participant

    That solved the problem. Thank you very much for catching that and taking the time to respond to me.

    I don’t understand how to test the fuse. On a normal fuse I see full continuity when the fuse is not connected to the device. I have done searches for the correct way to test this fuse and can’t find anything.

    Why do I see a resistance when testing this fuse?

    Thanks,

    Docfxit

  • #19997 Reply

    ville
    Participant

    Easiest way to check mooshimeters (or almost any multimeter) high current fuse is to set your device on resistance and short ohm and A-connectors with your probe(s).

    Like there, on page 17:
    https://moosh.im/s/manual/MooshimeterManualRev1.pdf

    Mooshimeter can’t give very accurate values near zero, but it’s not that common for these better fuses to show couple ohms when failed. If you get some ohms, there is more likely problem with your probes or meter calibration etc. I just tried my mooshimeter and it said negative 0,5 ohms, which would be impossible. I assume that everything is ok.

    That fuse is only for current measurements, so it can’t affect resistance or voltage.

    • This reply was modified 1 week, 1 day ago by  ville. Reason: ul-tag did something strange, i thought it was underline
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