Nortel DMS-100 Series Maintenance Manual page 74

1-58 OPM maintenance summary
The manual test procedures that determine if the user must replace the batteries
depend on the test that failed. These procedures consist of activities the user
performs at the MAP terminal and at the OPM site.
The following procedures contain instructions on the actions to take for test
failures.
Procedure that follows failure of open-circuit test at MAP terminal
At the OPM MAP display:
1. Disable the AUDIT from the PES MAP level.
2. To determine which voltage of the battery strings tested below
3. Place the failed battery string pair on the charge bus for 6 h.
4. Open circuit the failed battery string pair for a minimum of 6 h.
5. Use the PES MAP level MEASURE command to measure the voltage of
If the voltage
is less negative than
OPM_VOLT_TST_CHG
is equal to or more negative
than OPM_VOLT_TST_CHG
Note 1:
-50.9 Vdc for Yuasa and Eagle-Picher batteries.
Note 2:
OPM_VOLT_TST_LTU_ ADJUSTMENT (default=10) and truncated (-509 + 10 =
-499 Trunc-499=(-490) or -49V dc for Yuasa and Eagle-Picher batteries.
6. Disable the AUDIT from the PES MAP level.
7. To determine which voltage of the battery string tested below
297-8361-550 Standard 04.02 December 2004
OPM_VOLT_TST_OCC, use the PES117 log. If strings 1 and 5 were
marked failed, determine if string 1, 5, or both caused the alarm.
For OPMs with an MTU, the default for OPM_VOLT_TST_OCC is -504
or -50.4V dc for Yuasa and Eagle-Picher batteries. For OPMs with an
LTU, the default for OPM_VOL_TST_CHG is offset by
OPM_VOLT_TST_LTU_ ADJUSTMENT (default=10) and truncated
(-504+10) = -494 Trunc (-494) = -490 or -49V dc for Yuasa and
Eagle-Picher batteries.
the failed battery string pair.
For OPMs with an MTU, the default for OPM_VOLT_TST_CHG = -509 or
For OPMs with an LTU, the default for OPM_VOL_TST_CHG is offset by
OPM_VOLT_TST_DIS, use the PES117 log. If strings 1 and 5 were
do
leave the battery string pair on open-circuit and
proceed with step 8
the string can still accept a charge.
BSY and RTS the BCCDVR to return the battery
string pair to service. If the same string is marked
failed by the open-circuit test within the next two
months, proceed directly to step 8.