I didn't see a manual for the model # you provided. The closest I saw was a reference to a ferroresonant unit with auto-equalize. If this is what you have, there is no one specific voltage or current that you would see. Currents would peak when first going into EQ., and drop to next to nothing when shifting back into Float. Then consider parallax errors and different individuals' readings of analog meter faces.
Does your charger provide the compliment of alarms that many of the new ones include? If so, consider driving two or three indicators on the exterior. Use one fused supply off of the battery string and make sure that at least one is always on. You could use green for all OK, red for under or over voltage, amber for minor alarms, Et.C.
I can't tell you the battery voltage of any of our substation strings. Let any one of them drop below 125 VDC or loose it's AC supply, and we'll know about it within a few seconds. If you use a long-life green cluster LED for normal, and blinking clusters for alarms, you'll get the fastest response possible without wires or transmitters..
Joe
