Loading ...
Loading ...
Loading ...
10
5. Maintenance
The battery cabinet contains valve-regulated recombinant lead-acid (VRLA) batteries, which are maintenance-free relative to the electrolyte.
You cannot add water to these batteries or sample the electrolyte specific gravity. It is necessary, however, to periodically check the charging
voltage, temperature and connections of the individual battery units.
5.1 Maintenance Schedule
Quarterly Check
1. Measure individual battery unit temperature. (Measure with a digital thermometer by placing the surface thermocouple on the flat surface
of the negative terminal—not the “L” connection surface. An infrared temperature monitor can also be used. Temperatures below 77° F
reduce battery performance and temperatures above 77° F reduce battery lifespan. Battery lifespan is reduced by 50% for each 15° F
above 77° F. For example, battery lifespan will be reduced by half at 92° F.)
2. Measure individual battery unit float charging voltages. (Measure voltage with a digital voltmeter. Measured voltage should be between
13.2 VDC and 14.2 VDC. Battery units outside this range should be replaced.)
3. Measure total battery cabinet float charging voltage.
Semiannual Check
1. Repeat quarterly check.
2. (Optional) Measure impedance or conductance of individual battery units.
3. (Optional) Perform a high-rate, 100 A, 10 second performance capacity test of individual battery units. (The performance capacity test is
identical to the acceptance test in Section 4.4, and the same procedure should be followed.)
Annual Check
1. Repeat semiannual check.
2. Use insulated tools to tighten all connections to the recommended torque. (See Section 7.2 for recommended torque values.)
3. (Optional) Measure inter-battery connection resistance.
Loading ...
Loading ...
Loading ...