Beacon 110 Operator’s Manual 25
Responding to an Alarm 2 Condition
1. Follow your established procedure for a high level combustible or toxic gas condition
or an increasing oxygen concentration condition.
2. Oxygen alarms are factory set as self-resetting and will automatically clear when the
oxygen reading rises above the alarm 2 setpoint.
3. Alarms for all other gas types are factory set as latching. After the gas reading falls
below the alarm 2 setpoint, press the reset switch to reset the alarm circuit. Resetting
the alarm circuit silences the buzzer, turns off the Alarm 2 LED, returns the LCD to the
normal operation screen, de-energizes the alarm 2 relay, and turns off the strobe if it is
installed and set to operate for alarm 2.
NOTE: If the reset switch is pressed while the Beacon 110 is in an alarm 2 condition,
the buzzer will be silenced and the alarm 2 LED will flash but all other
indications will remain unchanged. If the strobe is installed and its alarm 2
operation is set to CanReset in Configuration Mode, the strobe will turn off.
You cannot de-energize the alarm 2 relay until the gas reading falls below the
alarm 2 setpoint.
Fail Condition
Fail Condition Indications
The Beacon 110 indicates a fail condition for any of the following:
• The detector head wiring is disconnected or incorrectly connected.
• The display reading is -10% of full scale or lower.
When the Beacon 110 senses a fail condition, it alerts you as follows:
• The fail LED turns on.
• The gas reading is replaced by the FAIL message.
• The buzzer sounds a steady tone.
• The fail relay de-energizes.
• If installed, the strobe flashes.
NOTE: The fail alarm has a 30 second delay.
Responding to a Fail Condition
NOTE: A fail condition cannot be reset using the reset switch.
1. Verify that the detector head wiring is correctly and securely connected.
2. If the detector head includes a replaceable plug-in sensor, verify that the replaceable
plug-in sensor is properly installed.
3. If necessary set the zero reading for your detector head as described in “Calibration
Mode” on page 34.
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