RKI Instruments Beacon 110 - Manual (Page 29)

Beacon 110 Operator’s Manual 25
The Beacon 110 senses a DC low power condition when the DC power source is 18.5
volts or less.
WARNING: While in a low power condition, the Beacon 110 is not an active gas monitor.
When the Beacon 110 senses a low DC power condition, it alerts you as follows:
• The fail LED turns on.
• The message LowPower is indicated on the top line of the LCD and the input voltage
is displayed on the bottom line of the LCD.
NOTE: The low DC power alarm cannot be cleared using the reset switch.
When the DC input voltage increases to 19.0 volts, the low DC power alarm is cleared and
the Beacon 110 will begin its warm-up sequence.
Responding to a Low DC Power Condition
• If DC power is the primary power source:
1. For a temporary DC power source, disconnect primary DC power at the Beacon 110,
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 Beacon 110 begins the warm
up process.
3. Verify that the Beacon 110 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 Beacon 110 begins the warm up process.
If the Beacon 110 was purchased with the battery charging feature, when AC power is
restored, the Beacon 110 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 Beacon 110 maintains the charge with the 100 mA charge current.
3. Verify that the Beacon 110 enters normal operation after its warm-up sequence.