C&D Technologies RS-2044 msEndurII Series - Manual (Page 24)

RS02044/1114/CD 24 www.cdtechno.com
Part 9 – Maintenance
The msEndur II is a VRLA cell which does not require water addition and no specific gravities or water
levels need to be checked throughout its life. However, it is recommended to properly follow the below
maintenance procedure, this will assure that the batteries are well maintained and ready for operation
when needed. A blank inspection report (RS-1992) is shown in Appendix E.
9.1 Monthly Inspection
1. Visual inspection of the battery for general appearance and connector conditions. Check for
bulging jars, corrosion build up or any signs of heat damage to the jars/covers and connectors.
Visually check cell spacing and cell side restraint plate GAP as noted in Appendix C, Table 2.
2. Measure and record the total system float voltage.
3. Measure and record the total system float current.
9.2 Quarterly (including the above)
4. Optional; measure and record one of the following: conductance, impedance, resistance or
internal resistance of each battery. Changes over time of less than ±20 % are acceptable,
changes of greater than 50% require further attention (such as a load test).
5. Measure and record the temperature of the negative terminal on each cell.
9.3 Semi-Annually (including the above)
6. Measure and record the individual cell voltages.
9.4 Annually (including the above)
7. Re-torque cell connector bolts to 125in-lbs (14 N-m).
8. Any disassembled connections should be re-torqued to 160 in-lb (18 N-m).
9. Measure and record connector resistance reading. If a value exceeds the average by 10% for
similar connections, see Appendix B and reference IEEE 1188 for more information.
10. If possible, measure and record the total and individual AC ripple current or voltage.
11. Clean products with a solution of 1 lb of sodium bicarbonate to 1 gallon of water, if necessary.
For more information, IEEE 1188 discusses the significance of connection integrity, further maintenance
techniques and testing information.
CAUTION:
Never use solvents to clean a battery system.
Only use a solution of water and sodium bicarbonate, 1 gallon to 1 lb.