RKI Instruments Digester Gas Monitor - Manual (Page 52)

46 • Alarm Indications Digester Gas Monitor Operator’s Manual
Gas Monitor, then connect a 24 VDC battery.
2. Determine and correct the cause of primary DC power loss. When the DC power
source rises above 19.0 volts, the Digester Gas Monitor begins the warm up
process.
3. Verify that the Digester Gas Monitor enters normal operation after its warm-up
sequence.
• If DC power is the backup power source:
1. If a non-rechargeable battery is used for backup, replace the battery.
2. Determine and correct the cause of primary AC power loss. When backup DC or
primary AC power is restored, the Digester Gas Monitor begins the warm up
process.
If the Digester Gas Monitor was purchased with the battery charging feature, when
AC power is restored, the Digester Gas Monitor charges the backup battery with a
charge current of approximately 100 mA until it is fully recharged. Charge time
varies depending on the battery size and how much the battery was depleted.
Once the battery is fully charged, the Digester Gas Monitor maintains the charge
with the 100 mA charge current.
3. Verify that the Digester Gas Monitor enters normal operation after its warm-up
sequence.