Checking transformer voltage behind my door bell

Old 03-04-18, 11:34 AM
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Checking transformer voltage behind my door bell

I was given a fluke meter 77 lV multimeter and I want to check the voltage output from the transformer behind my front door bell. I have never used a multimeter before. Which plugs do I choose for the leads connection and also which setting I choose with the dial? Again I am trying to find out the output voltage behind my front door bell button... Need Help Please... Is there a YouTube video showing me exactly what to do or can someone please give specific instructions to help me.
Thanks In Advanced. SaltheHippy.
Old 03-04-18, 11:59 AM
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Just turn the switch one step to V AC (AC=~) plug the 2 cables in to the jack on the right side Usually we put the black on COM.
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That instrument is auto range so you may measure the mains or the output with the same setting. Do not touch any live wires! Usually the output of a transformer like that is about 8V If it have some markings of voltage, it will usually be some higher reading until someone presses the ring button.


Last edited by PJmax; 03-04-18 at 12:20 PM. Reason: added pic from link
Old 03-04-18, 12:22 PM
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Welcome to the forums.

If you measure the AC voltage at the doorbell button.... you should see 14-20v AC.
The transformer base voltage is usually 16v.

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