Nortel DMS-100 Series Maintenance Manual page 60

1-44 OPM maintenance summary
The test-and-charge cycle starts on a Sunday. The following steps summarize
the procedure for all strings in the previous table:
1. Office parameter OPM_CHARGE_START_TIME presets the Sunday
2. The string to test is open-circuited for 24 hours.
3. The system measures the voltage of the string pair and tests the string pair
4. If the system does not mark the string as failed, the system discharges the
5. The system measures the voltages of the battery strings again, while the
6. If the system does not mark the string pair as failed, the string pair is
7. When the charge period is complete, the pair is open-circuited.
8. At OPM_CHARGE_START_TIME on Tuesday, the system measures
297-8361-550 Standard 04.02 December 2004
start time. The system measures voltages of the load bus, the two BCCs
and all open-circuited battery strings that contain entries. The system
sends the results to a PES116 log.
against the OPM_VOLT_TST_OCC value. If the pair fails this test and
failed the previous test-and-charge cycle, the system marks the string as
failed.
string for OPM_DISCHARGE_TIME if OPM_DISCHARGE_TIME > 0
and OPM_VOLT_TST_DIS > 0.
strings remain connected to the test load resistor. The system compares
the strings to the OPM_VOLT_TST_DIS value. If the pair fails this test
and failed the previous test-and-charge cycle, the system marks the string
as failed.
open-circuited. If a discharge did not occur, the system measures the open
circuit voltage. The system tests the discharge or open-circuit measured
voltage against the OPM_MIN_CHG_VOLT value. This action occurs
before the battery string connects to the charge bus. If this action fails, the
system does not generate an alarm and aborts the test-and-charge cycle.
The system moves the battery to the load bus and a PES115 log reports the
bypass of the charge cycle. If the action is successful, the system moves
the pair to the charge bus for OPM_CHARGE_DURATION.
and tests against the voltage OPM_VOLT_TST_CHG. If the test fails, the