Battery SG 1.295? Is that even possible???
...or have I just bought another useless hydrometer that should be tossed along with the one with the 4 floating balls and the EZ-Red? It is a Hydro Volt and after reading about it, I thought it ju...
Forum Discussion
pnichols wrote:
I recently opened my DMM and "re-calibrated" it so that it's voltage ranges now read about the same as two other voltmeters that already agreed pretty closely with each other.
Now I have 3 ways to measure RV DC voltages that are all accurate or that are all inaccurate ... depending upon whether or not one believes that 2 out of 3 must be right. ;)
I recently purchased a reasonably good quality consumer DMM and must have picked well as it reads about as close to a calibrated Fluke as one could reasonably expect considering it's price point. Interestingly my P3 Kill-a-Watt meter matches it quite closely but pretty well everything else I own doesn't, including my Progressive Industries EMS-HW30C surge protector which was calibrated to read ~ 1.4 volts high. Since the Progressive hard wire modes are user serviceable I recalibrated it so it now matches the DMM quite closely, a bit of a challenge since it only reads to the nearest volt. When I peeled back a label on an inexpensive energy meter that read several volts lower than the DM I found a calibration screw and was able to also reset it to closely match. Unfortunately the reality is that when buying consumer grade meters like this you're going to get what you get and shouldn't be surprised that calibration isn't anywhere near close as may be claimed, the good news being that in many cases you can do your own calibration provided you have one device of known correct calibration.
