I have 2 , one decimal place digital voltmeters on my dashboard. Each has 3 wires, one of which is a dedicated voltage sense wire, and also have a calibration pot on the backside.
Calibrating it with a 2 decimal place DMM was a process of trial and error and 'good enough' once I ran the sense wires directly to battery terminal(+)
They come on with my ignition. Before I ran the voltage sense wires they just fed from the OEM fuse block, temporarily. I could turn on various loads, not even on the same circuit and they would fluctuate wildly, where actual battery voltage was much less erratic.
Next to my voltmeters is a potentiometer that attaches to an adjustable voltage regulator controlling my alternator. Best Modification ever :)
I own the hall effect sensor Ammeter/voltmeter linked to previously. Its voltage reads 0.2v off. Soon the it will be on my dashboard displaying only amperage.
The thread title is amusing, kind of like will a voltmeter work as a voltmeter?
Lets see if we can debate this for a few more pages.
My answer..... It depends. Details at Eleven.
