Technical Update:
IdentiFlex 600 Series
Troubleshooting Information
BATTERY CHARGER:
The battery charger circuit has several modes of
operation. When power is applied to the system,
battery voltage is checked to verify proper voltage. If
the batteries are above 22VDC, the charger will
immediately go into a high rate charge mode. This
charges the batteries in a high current mode to
approximately 29VDC. When this charge mode is
complete, a float charge of 27.5 VDC is applied to the
batteries to maintain the full charge. Periodically the
system will automatically test the battery for capacity.
When capacity is found to be low ,the high rate mode
is cycled. High rate mode of operation is logged into the history log but not indicated as fault
unless the batteries are below approximately 25VDC. If battery voltage is below 25, the
system will report fault condition. If the battery voltage is below 22VDC, the charging is reduced
to a 50 mA trickle charge to prevent high rate charging of batteries with bad cells.
During battery backup operation when the batteries fall below 18VDC, the system will enter a
"Suspended Operation" mode. In this mode the analog modules are not monitored.
Connect a, known good, set of fully charged batteries to the system. Cycle the batteries
through the operation described above. (This connection is for batteries only; connections
other than batteries will cause unwanted battery charger operation.)
TECH TIP
1
Issued 7/17/02
TU 00702
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