30
Rev.12/31/97
B.
B. Monthly
Monthly
Check voltage across the battery terminals with an accurate digital voltmeter
and adjust the panel voltmeter if necessary. Record pilot cell voltages to the
nearest 0.01 volt, measured with an accurate digital voltmeter, on form
POM-133A. Battery is functioning normally if all cells are above 2.14 volts.
and adjust the panel voltmeter if necessary. Record pilot cell voltages to the
nearest 0.01 volt, measured with an accurate digital voltmeter, on form
POM-133A. Battery is functioning normally if all cells are above 2.14 volts.
C. Quarterly
C. Quarterly
Check voltages across all individual cells and record them on POM-133A.
4.4 SPECIFIC GRAVITY READINGS
4.4 SPECIFIC GRAVITY READINGS
A. Monthly (Attended Stations) or During Routine Inspections(Unattended Stations)
A. Monthly (Attended Stations) or During Routine Inspections(Unattended Stations)
Read the specific gravity of the pilot cell. For accurate readings, hold the
hydrometer vertically and use a long nozzle syringe about one-third down
hydrometer vertically and use a long nozzle syringe about one-third down
from the top. Record the pilot cell specific gravity, corrected for
temperature, on form POM-133A.
B.
B. Quarterly
Quarterly
Read the specific gravity of 10 percent all cells and record, corrected for
temperature, on form POM-133A.
temperature, on form POM-133A.
C. Annually
C. Annually
Read the specific gravity of 100 percent of the cells, corrected for
temperature, and record on form POM-133A.
temperature, and record on form POM-133A.
4.5 HEAVY DISCHARGE
4.5 HEAVY DISCHARGE
The battery should be recharged as quickly as possible following a heavy
discharge. This recharge can be done by raising the charging voltage to the
maximum allowed by other circuit components but not greater than the
range of 2.33 to 2.38 volts per cell. The battery should be returned to
normal voltage after the capacity been restored.
discharge. This recharge can be done by raising the charging voltage to the
maximum allowed by other circuit components but not greater than the
range of 2.33 to 2.38 volts per cell. The battery should be returned to
normal voltage after the capacity been restored.
4.6 WATER REPLACEMENT
4.6 WATER REPLACEMENT
Add water only when the water level approaches the low level mark or prior
to an equalizing charge. This step should be needed every 2 or 3 years with
a proper charging program.
to an equalizing charge. This step should be needed every 2 or 3 years with
a proper charging program.