I recently purchased 2 little voltmeters they look like the sort that would go in a control or instrument panel they are connected with just 2 wires which provide the operating supply ( they light up green and red) however the green one states it will work between 20and 500 volts and the red one between 60 and 480 volts. When they are both on the green one indicates normally around 241 volts the red one shows 235 volts why the discrepancy I know it's not much but makes you wonder if one of them is lying. Secondly I've noticed that the green one tracks voltage changes faster than the red one and that a few times the green one jumps down to 238 then up to 241 multiple times while the red one stays the same and I think can see a slight flicker in my filament lamps when this is happening incidentally both meters are connected to the same plug a 2 pin 5 amp one
We are using meters to provide us with information throughout the day, you have to know when good enough is good enough when it comes to what the meter is indicating and assessing the result.
The specification for an all singing and dancing Megger MFT 1741
Open circuit voltage
5 V ±1 V
Fluke T6-600
AC voltage
±(1.5 % + 2 counts) 45 Hz - 66 Hz
How do your voltage meters compare with those testers, which I presume cost significantly more than your voltage meters?
We are using meters to provide us with information throughout the day, you have to know when good enough is good enough when it comes to what the meter is indicating and assessing the result.
The specification for an all singing and dancing Megger MFT 1741
Open circuit voltage
5 V ±1 V
Fluke T6-600
AC voltage
±(1.5 % + 2 counts) 45 Hz - 66 Hz
How do your voltage meters compare with those testers, which I presume cost significantly more than your voltage meters?
