We finally calibrated the
holding tank (ultrasonic gauge connected to BlueSea
monitor VSM422).
So we know that the tank is empty, and the BlueSea
monitor indicates that the tank is empty. Check.
The high
alarm is set to 80% and the low
alarm is off. Check.
Problem: When we turn off
power to the "instruments" at the DC panel, the
holding tank goes from 0% to 100% and the alarm sounds. When we turn the
instruments back on, the value goes to 0% and the alarm stops.
I am not sure if the
instruments were powered when I did the calibration.
What should I be looking for? The system was installed by the PO.