I have a 1972 vintage 10 KW standby generator with a trickle battery charger while the unit's in standby. Online the generator provides a 4 amp charge via a reverse current diode from the generator to the battery. Offline an L1 and L2 powered step-down transformer protected via a 3AG, 1 amp fuse provides power through a rheostat and resistor in series with a selenium rectifier. The rectifier in series with a milliammeter is designed to provide a .02 amp charge to the battery. This charger is not functioning and I wish to test the milliammeter. If the meter is defective is is possible to test it by placing test probes across the terminals? Or should a terminal be disconnected and then place test probes in series with the meter? I have no idea as to the values or either the rheostat, the resistor or selenium rectifier. If the meter tests functional, then how do I test the selenium rectifier without removing it or taking the generator completely offline. All of the above is subjective based on an assumption that the step-down transformer and the X side of the transformers protective resistor is functional.
Have as much fun with this as you desire. I'm not thin skinned but need direction.
Have as much fun with this as you desire. I'm not thin skinned but need direction.