Alpha Technologies FlexPoint AX Series - Manual (Page 31)

31 010-318-C0-007, Rev. G
6. Frequently Asked Questions
7. If I replace a battery under a “no alarm” condition and the battery voltage was 12.6Vdc, and
an outage occurs and the battery voltage drops to less than 12.2Vdc, will this cause a “replace
battery” alarm, or will the unit try to recharge that battery until the next 40 day test?
No, the “replace battery” indicator will only be activated during the 40 day battery test
routine. Under normal operation, including power failure, the alarm is not activated. Under
these conditions the unit will try to recharge the battery until the next 40 day test.
8. Does the charger disconnect or “ramp back” when a replace battery alarm is illuminated? If not,
how does the unit prevent batteries from being cooked, which may cause a gas build up inside
the enclosure?
No. It will continue to charge the battery to the safe level per the battery manufacturer's
specifi cations. The enclosure provides adequate venting and minimal volume to keep
gas build-up from becoming a concern.
9. If I have a Power-Ring Converter (PRC) reading of 11.8Vdc on the output, is this unit considered
bad? What should be the voltage measured at the output of the device with no cable attached?
There is a high possibility that the voltage-controlled wire, between the battery unit and the
power supply, is not properly connected. Without the control wire, the power supply will only
put out a ~12V; 11.8V is pretty close to that voltage. If the connection is properly verifi ed, then
the unit may have a defective voltage regulation circuitry.
10. What is the line load regulation of the PRC?
Within the proper load, (no overload) the line load regulation of the PRC is excellent. It is
very tightly regulated since it provides the fl oat voltage to charge the battery.
11. Does this unit have a positive disconnect from the utility mains when operating under battery
conditions?
There is no physical disconnect from the main, and no chance for back-feed due to the High-
Frequency (HF) DC isolation transformer. Also, the unit is agency-qualifi ed under stringent
double insulation criteria for SELV (Safety Extra Low Voltage).
12. Does the green wire (control wire for the battery) have a readable voltage that means anything?
The functional voltage on the green wire could be any value between 0V to +4V, depending
on the battery condition and load. Therefore, it is not a very useful troubleshooting tool.