HP 3400a True RMS Voltmeter?
I have had one of these for the longest time and I really know very little of what it is used for. It seems to work, but it does not appear to measure like a normal voltmeter, you can't just set it to the 30v range and hold the leads against a 9v battery, you seem to have to pulse it. Does anyone know about them? How much are they work because I was thinking of selling it and I have everything for it, the unit, the power cord, test leads, a manual etc.
Any info on it or how it works would be appreciated!