6
Rev.12/31/97
D.
D. Monthly
Monthly
With the charger in service, check the overall float voltage across the battery
terminals with an accurate digital meter and record on form POM-133A.
terminals with an accurate digital meter and record on form POM-133A.
E. Monthly
E. Monthly
Check the pilot cell float voltage with an accurate digital voltmeter and
record on form POM-133A.
record on form POM-133A.
F. Quarterly
F. Quarterly
Check the float voltage on all individual cells to the nearest 0.01 volt with an
accurate digital voltmeter. Take these readings as rapidly as possible and
record them on form POM-133A. At the end of the yearly cycle, use these
accurate digital voltmeter. Take these readings as rapidly as possible and
record them on form POM-133A. At the end of the yearly cycle, use these
readings to determine the pilot cells for the next year.
1.4 SPECIFIC GRAVITY READINGS
1.4 SPECIFIC GRAVITY READINGS
Specific gravity readings of vented lead-acid batteries must be taken in
accordance with the following instructions.
Note:
All specific gravity readings
must be corrected to 77EF before recording (see 2.18). Do not attempt to
take any specific gravity reading after adding water to a cell. The electrolyte
takes several hours to mix after water is added.
takes several hours to mix after water is added.
A. Monthly
A. Monthly
Take the specific gravity reading of the pilot cell and record it on form POM-
133A.
133A.
B. Quarterly
B. Quarterly
Take specific gravity readings of 10 percent of the total number of cells and
record them on form POM-133A. Rotate these cells so that readings are
taken on different cells each quarter.
record them on form POM-133A. Rotate these cells so that readings are
taken on different cells each quarter.
C. Annually
C. Annually
Take specific gravity readings of every cell and record them on form POM-
133A.
133A.
D. After Equalizing Charge
D. After Equalizing Charge
About 15 minutes after heavy gassing stops, take the specific gravity readings
of every cell and record them on form POM-133A. If two cells with the
lowest specific gravity (checked over the last one-eighth of the charging
period) have not stopped rising, continue the equalizing charge.
of every cell and record them on form POM-133A. If two cells with the
lowest specific gravity (checked over the last one-eighth of the charging
period) have not stopped rising, continue the equalizing charge.