Quarterly Maintenance
The following checks should be completed
quarterly.
1. Assure the battery room is clean, free of
debris and well lighted.
2. Assure that all facility safety equipment is
available and functional.
3. Measure and record the air temperature
within the battery room.
4. Visually inspect the battery for:
a. cleanliness.
b. terminal damage or evidence of
heating.
c. container or cover damage.
d. evidence of overheating
5. Measure and record the battery system
DC float charging voltage at the battery.
Optionally measure and record the AC
ripple voltage at this time also.
6. Measure the DC voltage from each
polarity of the battery to ground to detect
any ground faults.
7. If possible, measure and record the battery
system DC and AC float charging current.
8. Measure and record the temperature of
the battery pilot unit. Measure the
temperature on the side of the unit in the
center or at the negative terminal of
the unit.
9. Measure and record the individual unit
DC float charging voltage.
10. Measure and record the System
Equalization Voltage.
Semi-Annual Maintenance
1 Repeat the quarterly checks,
2. Optionally perform the 10 sec. high rate
(e.g. 100 amp) load test to assure the
individual batteries are functional.
3. Optionally perform the 10 sec. high rate
(e.g. 100 amp) load test to assure the
individual batteries are functional.
4. Optionally measure and record the
resistance/impedance/conductance of
the individual units to trend the condition of
the individual units over time and to detect
dramatic differences between individual
units and the norm.
Annual Maintenance
1. Repeat the semi-annual checks.
2. Retorque all the interunit connecting
hardware to the values noted in tables
listed in the Table of Contents.
This can be omitted if the connection
resistance is measured and found to have
not increased more than 20% from the
value at installation.
Bi-Annual Maintenance
The battery should be capacity tested every two
years at the service load or at the battery rating
related to the service requirements. Ideally, this
will be the same rate at which it was acceptance
tested when originally installed. Once the battery
is found to be at 85% of rating, it should be
capacity tested annually. Capacity testing instructions
are found in the bulletin "Acceptance and
Capacity Testing" #41-7135.
Data Analysis and Corrective Actions
The data accumulated during the periodic
maintenance activities should be recorded on a
form such as shown in Appendix One. Following is an
explanation of how the data would be interpreted
and the correction action to be taken. However, it
must be recognized that this explanation is not all
inclusive and the analysis and corrective action
decision must be made by personnel familiar with 10
Year VRLA batteries and their operation and
failure modes.
41-7546/0213/CD 6 www.cdtechno.com
