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8-2
All the 4100U-S1 cards and modules in the base panel are tested and aligned in the
factory before being supplied to the customer. The only field adjustment that may be
necessary is to set the battery charger voltage. (Note this has been set and should not
need re-adjusting).
R341 Battery Charger Voltage
Should the battery charger voltage need adjusting, the method is as follows:
1. Run the system with the batteries connected and the door closed for at least 30
minutes to allow components to "warm up" (the longer the better).
2. Calculate the required no-load battery charging voltage by taking 27.3V for
20°C and subtracting 0.1V for every 3°C above 20°C, or adding 0.1V for every
3°C below 20°C.
3. With the system not in Alarm, disconnect the batteries.
4. Measure the voltage at the battery terminals on the SPS and adjust this to the
voltage calculated in Step 2 by turning pot R341 on the SPS.
5. Re-connect the batteries.
Alignment & Adjustment
Overview