Brianhd1000
When I read for frequency on a non RMS meter at 11 and 44 connections at the main output breaker on my new model 5884 generator while generator is running of course, the meter for a second or two reads the correct frequency of 60Hz. The reading then jumps to over a hundred. When reading line power frequency in the house the meter reads 60Hz and does not vary. Is this because of the electromagnetic interference at the point of a running generator? Where are the best points to read for frequency from the generator power? Thank you for any clarification. :confused:
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piper18
With that unit you have the Nexus control panel and it should have a built in frequency readout. I have a fluke clamp meter that will read the frequency along with the current output and I clamp on a wire in the transfer switch box.
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Skip Douglas SkipD
Brianhd1000;11786 wrote:
When I read for frequency on a non RMS meter at 11 and 44 connections at the main output breaker on my new model 5884 generator while generator is running of course, the meter for a second or two reads the correct frequency of 60Hz. The reading then jumps to over a hundred. When reading line power frequency in the house the meter reads 60Hz and does not vary. Is this because of the electromagnetic interference at the point of a running generator? Where are the best points to read for frequency from the generator power? Thank you for any clarification. :confused:
If you were to put an oscilloscope across the power output of our generators, you would see that there is a lot of "noise" on the nominal sine-wave waveform. That's essentially because of the voltage regulator electronics doing its thing. It's that "noise" that confuses the heck out of a cheap multimeter.

It would make no difference where the measurement is made along the power wiring. In other words, proximity of the meter to the generator is not the source of the problem.

I have never had a problem reading the frequency of my generators when using Fluke meters that are rated as reading "True RMS" values on AC measurements.
Skip Douglas
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