Lucent Technologies Round Cell Batteries
7 - 6 Operation and Maintenance Issue 3 December 1999
Check and Record Reference Cell Temperature
Interval Perform this procedure quarterly.
Guidelines The Round Cell, like all lead-acid cells, is affected by the temperature
of its electrolyte. Observe the following precautions when working with
the Round Cell Battery:
• The Round Cell can tolerate extreme temperatures for short and
infrequent periods, but every attempt should be made to maintain the
electrolyte temperature from exceeding 110°F (43.3°C). Electrolyte
temperatures from 77°F (25°C) down to freezing result in lowered
battery capacity. Elevated temperatures result in decreased battery
life.
• Temperatures of cells within the same string should be within 5°F
(2.8°C) of each other. The top row of 3-tier stands is particularly apt
to have higher temperatures than the bottom row. Where necessary,
use fans or other means of ventilation to minimize temperature
variations between cells in the same string.
Temperature
Reference Cell
During the installation period, one cell in each tier was selected as the
temperature reference cell for that tier. This cell is used for taking the
temperature measurement.
Procedure
Note
To avoid possible electrolyte contamination, NEVER use mercury
thermometers to take cell temperature readings. Use toluene
thermometers (KS5499 List 1352, List 1353).
Measuring Reference Cell Temperature
Step Action
1
Insert the thermometer into the reference cell through the vent
funnel.
2
Submerge the bulb of the thermometer completely in the
electrolyte for at least 2 minutes before taking a reading.
3
Record the reference cell temperature.
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