peter-b
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Hi,
I am just learning and doing electronics as a hobby and I recently purchased a Fluke 87-V. It is spot-on except its AC measurements are puzzling - it seems the readings are off by 10-20% or even more. I noticed its AC readings (both the voltage and current) did not match some other sources. Then I connected it to a NI DAQ generating a perfect sinusoidal volatge signal and it was still off: For 1VAC where RMS should be 0.707 it was hovering around 0.5 and not stabilizing. Peaks were wrong: instead of +1 max and -1 min it is something like +0.4 max and -1.63 min; the frequency measuremets are also way off along with duty cycles.
Could somebody explain is that ‘normal’, is that something I did wrong (but with such a simple setup it should measure correct values!), do I need to ask Fluke for service and what is going on?
Thanks
Peter
I am just learning and doing electronics as a hobby and I recently purchased a Fluke 87-V. It is spot-on except its AC measurements are puzzling - it seems the readings are off by 10-20% or even more. I noticed its AC readings (both the voltage and current) did not match some other sources. Then I connected it to a NI DAQ generating a perfect sinusoidal volatge signal and it was still off: For 1VAC where RMS should be 0.707 it was hovering around 0.5 and not stabilizing. Peaks were wrong: instead of +1 max and -1 min it is something like +0.4 max and -1.63 min; the frequency measuremets are also way off along with duty cycles.
Could somebody explain is that ‘normal’, is that something I did wrong (but with such a simple setup it should measure correct values!), do I need to ask Fluke for service and what is going on?
Thanks
Peter