Page 13 579-1019 Rev M
4009 IDNAC Repeater Installation Instructions
Periodic battery testing
Consult the following requirements for battery testing:
• Test the batteries annually by discharging them with a suitable tester and verifying that the battery voltage is at least 21 V when fully discharged.
• Replace the batteries sooner than 4 years from the date of installation.
• Install batteries within six months of the date of their manufacture.
Additional battery information is as follows:
• The 4009 Repeater battery charger is temperature compensated according to battery manufacturer recommendations. There is no charger voltage
adjustment.
• The battery voltage fluctuates with temperature variations. At normal room temperature the battery voltage should be 27-27.6 V when the battery
set is fully charged. At higher temperatures, the voltage is lower. At lower temperatures, the voltage is higher.
• Table on page 13 shows the proper range of battery voltage across the specified operating range of the equipment.
Table 7: Voltage and temperature*
Temp (F) Temp (C) V/cell (min) V/cell (max) Min. Battery Voltage Max. Battery Voltage
32 0 2.294 2.367 27.53 28.40
41 5 2.284 2.352 27.41 28.22
50 10 2.274 2.337 27.29 28.04
59 15 2.264 2.322 27.17 27.86
72 22.2 2.250 2.300 27.00 27.60
77 25 2.244 2.292 26.93 27.50
86 30 2.234 2.277 26.81 27.32
95 35 2.224 2.262 26,69 27.14
104 40 2.214 2.247 26.57 26.96
113 45 2.204 2.232 26.45 26.78
120.2 49 2.196 2.220 26.36 26.64
* For 12-Cell battery sets with 24 V minimal rating
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