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Rev.12/31/97
1.5 TEMPERATURE READINGS
1.5 TEMPERATURE READINGS
All cells of a battery should be at the same ambient temperature. Heat
sources such as sunlight, portable heaters, etc. must be blocked so they do
not raise the temperature of individual cells. Record the room ambient
temperature before cell temperatures are taken.
sources such as sunlight, portable heaters, etc. must be blocked so they do
not raise the temperature of individual cells. Record the room ambient
temperature before cell temperatures are taken.
Note:
An accurate infrared (IR) camera may be used for temperatures;
however, the camera calibration must be checked at least once each year. If
possible, take the annual temperature readings of the cells just after camera
calibration. If the temperature spread of the cells exceeds 5 °F (i.e., upper
rows are warmer) the room ventilation may be inadequate.
possible, take the annual temperature readings of the cells just after camera
calibration. If the temperature spread of the cells exceeds 5 °F (i.e., upper
rows are warmer) the room ventilation may be inadequate.
A. Monthly
A. Monthly
Record the pilot cell temperatures on form POM-133A.
B. Quarterly
B. Quarterly
Record temperature readings of 10 percent of all the cells; rotate the subject
cells each quarter.
cells each quarter.
C. Annually
C. Annually
If an accurate IR camera is available, take the temperature of the battery
connections during a load or discharge test, i.e., while current is flowing. If
one or more of the connections are loose or dirty, their temperatures will be
higher than the other connections.
connections during a load or discharge test, i.e., while current is flowing. If
one or more of the connections are loose or dirty, their temperatures will be
higher than the other connections.
1.6 CONNECTION RESISTANCE READINGS
1.6 CONNECTION RESISTANCE READINGS
A. After Installation
A. After Installation
Using an accurate micro-ohm meter, record the resistance of each
connection on form POM-134A. The readings should be on the order of a
few micro-ohms (less than 100). Record the readings as a baseline on form
POM-134A. For additional information see IEEE 450-1995--
connection on form POM-134A. The readings should be on the order of a
few micro-ohms (less than 100). Record the readings as a baseline on form
POM-134A. For additional information see IEEE 450-1995--
Maintenance,
Testing , and Replacement of Vented Lead-acid Batteries, Annex D and F. See below
for detailed instructions.
B. Annually
B. Annually
Repeat resistance checks of the connections checked in step A above and
compare values. If any connection resistance has increased more than 20
percent, clean, apply no-ox grease, retorque the connections, and retest.
Fill out both "as found" and "as left" columns on form POM-134A.
compare values. If any connection resistance has increased more than 20
percent, clean, apply no-ox grease, retorque the connections, and retest.
Fill out both "as found" and "as left" columns on form POM-134A.