System Operation
Digitize Inc.
12
700271-0001 Rev. G 05/13
4.3
Battery
The DET-16 panel is shipped with a 12 volt 7 amp-hour lead acid battery. This battery, when
new and fully charged, will provide more than 70 hours of continuous “quiet” operation for
the panel during an ac power failure.
During normal operation, the panel will continuously charge the battery. Once every two
minutes, the panel will test that the battery is connected to the panel and measure the current
battery voltage. The voltage will be displayed on the 2
nd
line of the display.
Remember that the battery is only tested once every two minutes.
A Battery Failure will be reported if any of the following conditions occur:
1.
The battery is not connected to the panel.
2.
The battery is accidentally connected backwards disabling Fuse F3.
3.
Fuse F3 has been disabled due to some other over current problem.
4.
The battery voltage currently measures less than 10.5 volts.
When a battery failure is detected, the panel Trouble Relay will release. The display will
show the following data concerning the battery.
See Function 2 to program how the panel will react when a battery failure is detected and
corrected. The panel can be programmed to initiate a telegraph transmission when a battery
failure is detected and corrected.
Note: If the battery is allowed to completely discharge during an AC Power Failure, the user
is encouraged to consider replacing the battery. Sealed Lead Acid batteries ratings drop
considerably after a “Deep Discharge Cycle”. Battery ratings also will decrease over time. A
battery testing procedure should be implemented to guarantee a minimum time for standby
operation and to replace old batteries.
4.4
AC Power
AC power for the DET-16 is provided by a 14 VAC Class B transformer mounted inside the
panel. During normal operation, the ac power input supplies power for the panel and the
backup battery charger. Below is a typical display indicating the battery charger voltage.
Summary of Contents for DET-16
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