MEXICOWANDERER wrote:
TWELVE VOLTS is the power supply for this PANEL meter. It is not hand-held.
The MEASUREMENT CIRCUIT is an entirely different portion of the meter. It will measure from 0.000 to 33.0 volts.
Absolutely different than standard 12-volt PANEL meters, this one can measure voltage DROP. It is not meant to substitute running around with a 9-volt battery hand held meter, measuring voltage drop.
But it WILL measure voltage DROP between batteries, between battery banks, between bank and inverter, solar panel arrays to 33.0 volts. Voltage drop. Problems with MPPT and PWM controllers.
This particular meter would not be very good for measuring many of these voltage drops because the input is not isolated from the power supply. You would have to either have an isolated power supply for the meter (which is not too hard to come by these days for a few dollars), or else make your measurements with respect to a common ground and subtract manually.
MEXICOWANDERER wrote:
If anyone thinks their FLUKE meter is as accurate as a 100 MHz Tektronix oscilloscope or a hundred plus dollar array of 10ppm calibration resistors, please let me know.
The issue is over VALUE not superlative based quantification.
For making absolute DC voltage or current measurements, or similar AC measurements with clean sinusoidal waveforms, my Fluke meter is much more accurate than my 200 MHz Tektronix 7704A scope. I'm pretty sure that would be equally true even for newer DSOs.
