What this guy said. Need a true RMS spec multi-meter. That Klein meter shown is just measuring the peak to peak voltage and averaging a result and assuming it is sinusoidal.
voltage output on my 115VAC outlet in the back seat is 95 volts! This is definitely a problem. Any one else check their voltage levels? I've barely used the outlet so I'm sure I didn't blow the inverter. thoughts?
oh shit that's the adapter I need. I've got the Fluke 87V which looks like the direct comparable to that HP.
I’ve had this adapter for many years and don’t remember where I got it. I just did a search for anything similar and nothing comes up. I thought they were a little more common.
that adapter is only available in a bin of banana plugs in the back of an old shop!I’ve had this adapter for many years and don’t remember where I got it. I just did a search for anything similar and nothing comes up. I thought they were a little more common.
You might be able to make this work.that adapter is only available in a bin of banana plugs in the back of an old shop!
I just found Klein makes one but I'm not testing enough receptacles to justify it
HP 972A specifications say it is still a average responding calibrated to display RMS. It is not really a True RMS calibrated for Sinewave which the HP 973A is. So I am not surprised you got the 92.6 volt measurement with it.I just checked my inverter with a true RMS meter and it says 92.6V. Not good. The frequency is also a bit off (61HZ) which will impact things that reference to line frequency like old VCRs, turntables and probably some newer stuff.
For easy AC line measurements you really need a 2 prong to binding post adapter. Ooh, I need to clean my rear cup holders!
The HP manual claimed reasonable RMS accuracy but apparently it’s not the right meter. This one is specifically for measuring AC power circuits and is true RMS. I see it’s not a square wave but a modified step square wave.
