Need help on how to do Zero Current Calibration on my set up:
Manual says that to do a zero current calibration "ensure there really is no current flowing in or out of the battery" and "disconnect the cable between the load and the shunt, then press 'select"'
What do they mean by "the cable between the load and the shunt"? and is that really enough to ensure "zero current flowing in or out of the battery" in the case of my set up?
I have two batteries. One negative cable (the one being fully monitored, call it the "main" battery) goes to the "bottom" of the shunt and the other battery (the one with the voltage only being monitored) goes to the "top" of the shunt. Then a "common" cable goes off the top to the common ground.
I also have solar positive and negative leads going from my solar charge controller directly to the main battery
Finally, I have bilge pump, gasoline fume detector, Victron MTTP 100/15 charge controller and Blue Seas ACR all with positive leads connected to the main battery before the battery selector switch and with their negatives going to the same common ground as the BMV 712
So in order to do a zero current calibration and "ensure there really is no current flowing in or out of the battery" would I
1. Disconnect the solar source (disconnect at solar panel end)
2. Disconnect the "common" negative feed off the "top" of the shunt.
AND
Do I also need to disconnect the charge controller, ACR and fume detector in order to accomplish the zero current calibration?
thanks!
