Alpha Technologies AlphaCell SMU - Manual (Page 13)

13 745-680-B9-001
6.0 Maintenance, continued
6.2 Quarterly Maintenance
• Repeat monthly inspection.
• Measure and record the fl oating voltage of every cell. If more than two cells’ voltages are
less than 2.18V, the batteries need to be boost charged (see Section 5.2). If the problem
persists, conduct annual and then three-year maintenance.
6.3 Yearly Maintenance
• Repeat quarterly maintenance and inspection.
• Ensure all connections are clean and tight.
• Check the load of the batteries by conducting a capacity (discharge) test: discharge the
batteries to between 30% and 40% of rated capacity.
6.4 Three-year Maintenance
• Conduct a capacity (discharge) test. Replace any battery with a capacity less than 80%
of rated capacity.
7.0 Storage
Storage procedures:
•
Before storing, fully charge the batteries. Storing a battery in a discharged state will negatively
affect its life span and capacity.
• All lead acid batteries experience self-discharge in open circuit. The self-discharge rate is largely
determined by ambient temperature: the lower the temperature, the lower the discharge rate
and the higher the temperature, the higher the discharge rate. Store batteries in a clean, well
ventilated location with temperatures between 0°C and 35°C.
• In order to avoid permanent damage to the plate caused by self-discharge, the batteries should
be boost charged after every three months in storage (see section 5.2).
• Record all dates and services performed. See page 22 for form.