Independent voltmeters
A few months ago I installed 2 small, one decimal place, voltmeters on my Dashboard. One for each battery.
Each voltmeter has 3 wires (+), (-) and (+) voltage sense. The voltage sense wires go right to the battery terminal of each battery.
The ground wires of each voltmeter goto a nearby ground source, the same source.
When starting the engine on battery one only, voltmeter one will reflect lowered voltage anywhere from 1 to 2.5 volts before the engine catches.
But voltmeter 2 also drops, but only by 0.1v.
Is this because of the shared ground, or perhaps the proximity of the 2 voltmeters(about 2 inches apart)?
I'd hate to think my Blue seas manual Switches were leaking some current during engine cranking.
Not sure it is worth the effort of moving the voltmeter grounds to the battery (-) themselves, just to find out.
Each voltmeter has 3 wires (+), (-) and (+) voltage sense. The voltage sense wires go right to the battery terminal of each battery.
The ground wires of each voltmeter goto a nearby ground source, the same source.
When starting the engine on battery one only, voltmeter one will reflect lowered voltage anywhere from 1 to 2.5 volts before the engine catches.
But voltmeter 2 also drops, but only by 0.1v.
Is this because of the shared ground, or perhaps the proximity of the 2 voltmeters(about 2 inches apart)?
I'd hate to think my Blue seas manual Switches were leaking some current during engine cranking.
Not sure it is worth the effort of moving the voltmeter grounds to the battery (-) themselves, just to find out.
