Battery Maintenance Schedule
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17 Battery Maintenance Schedule
The CRT-300 Cellcorder can easily take periodic maintenance readings. An
effective maintenance program that meets the recommendations of most
battery manufacturers calls for the following measurements:
INTERVAL
PARAMETER
Quarterly
Semi-Annually
Annually
Cell Voltages
X
Intercell Resistance
X
Internal Resistance -
Vented Cells
X
Internal Resistance -
Sealed Cells
X
Specific Gravity
X
Temperature Profile
X
Capacity -
Vented Cells
Every 3 to 5 years until signs of degradation,
then once every year.
Capacity -
Sealed Cells
Every year.
Figure 29. Battery Maintenance Schedule
NOTE: VRLA or sealed cells must be tested more often because of their
shorter life expectancy and lower reliability.
Use Cellcorder resistance measurements in conjunction with baseline data on
the batteries being maintained. Obtain cell resistance baseline data from the
battery manufacturer or Albér, or acquire it with a capacity test.
Take Cellcorder readings according to the Maintenance Schedule table; the
resistance readings dictate which battery string should be subjected to
capacity testing. If one or more cells exhibit cell resistance 30% to 40%
higher than the average or baseline value, then capacity test those cells using
a single cell tester, such as the Albér SCT-200. If most cells are above the
normal expected readings, then capacity test the entire string.
