Alpha Technologies Micro Secure UPS - Manual (Page 66)

017-220-J0 Rev B
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7.3.3 Battery Maintenance
The batteries supplied with this unit are sealed and maintenance free. Regularly ensure that all connectors are
tight and free of corrosion. The presence of corrosion, swelling of the battery case, or distortion in the shape of
the case suggests that the batteries need to be replaced.
7.3.4 Battery Conductance Test (Optional)
1. Place the conductance meter probes across Battery #1.
2. Record the voltage and Siemens values in a log book.
3. Repeat for batteries #2, #3 and #4.
A new AlphaCell 180GXL battery has a conductance reference value of 1100 Siemens at 25°C. When this value
drops to 550 Siemens or 50% of the new battery reference value, the battery capacity is suspect of being below
80% and should be evaluated further. When the temperature of the batteries is not between 20°C and 30°C, use
the following temperature compensation values.
Table N — Battery Temperature Compensation Values
Battery Temperature
Reference Value New 180GXL
Suspect Value
35°C or higher 1183 592
30°C 1140 570
25°C 1100 550
20°C 1063 532
15°C 1028 514
10°C 995 498
5°C 965 483
0°C or colder 936 468
7.3.5 Replacing the Batteries
Replace the batteries according to the results of the self test or the presence of terminal corrosion, swelling of
the battery case, or distortion in the shape of the case. New batteries will normally provide longer run times than
older ones. Larger capacity batteries may be available. Contact Alpha Technical Support (1 888 462 7487) to
order replacement batteries or to obtain assistance. On-site service may be available in your area.
Tools and Materials Required
• AC/DC voltmeter or multimeter.
• Labels or masking tape and marker.
• Torque wrench.
• Slot head screwdriver to fit the terminal blocks.
• High strength, flame-proof tape such as duct tape.
• Battery terminal corrosion inhibitor (such as NOCO Company’s NCP-2 or Sanchem Inc.’s No-Ox ID Grease
“A”).