Beacon 410 Gas Monitor Operator’s Manual Alarm Indications • 29
• the applicable alarm 1 channel relay energizes
• if installed and set to activate in an alarm 1 condition, the strobe flashes
Responding to an alarm 1 condition
This section suggests the following responses to an alarm 1 condition:
1. Follow your established procedure for a low-level combustible or toxic gas condition or
a decreasing oxygen condition.
2. To acknowledge the alarm condition and silence the buzzer while in an alarm 1
condition, press and release the reset switch. The alarm 1 LED will begin to flash
indicating the alarm condition has been acknowledged. You cannot de-energize the
alarm 1 relays until the gas reading falls below (rises above for oxygen) the alarm 1
setpoint.
3. After the gas reading falls below (rises above for oxygen) the alarm 1 setpoint, press
and release the reset switch to reset the alarm 1 circuit. Resetting the alarm 1 circuit
silences the buzzer (if the alarm has not been acknowledged), turns off the alarm 1
LED, resets the display for the channel(s) in alarm, turns off the strobe if it is installed
and set to activate for alarm 1, and de-energizes the common and channel alarm 1
relays and relay D.
Alarm 2 Condition
This section describes the indications for an alarm 2 condition and suggests responses to
an alarm 2 condition.
Alarm 2 condition indications
When the gas reading of an active channel reaches the alarm 2 setpoint, the Beacon 410
senses an alarm 2 condition. The Beacon 410 alerts you to an alarm 2 condition as
follows:
• the ALARM 2 LED turns on
• the gas reading during an alarm 2 condition alternates with the ALM 1,2 (ALARM-2
for oxygen) message
• the buzzer sounds a pulsing tone
• the common alarm 2 relay (relay B) energizes
• for an oxygen channel, relay D energizes (it is already energized for non-oxygen
channels)
• the applicable alarm 2 channel relay energizes
• if installed and set to activate for alarm 1, the strobe continues to flash for non-oxygen
channels
• if installed and set to activate for alarm 2 only or for oxygen channels, the strobe
begins to flash when an alarm 2 condition begins
Responding to an alarm 2 condition
This section suggests responses to an alarm 2 condition.
1. Follow your established procedure for a high-level combustible or toxic gas condition,
or an increasing oxygen condition.
2. To acknowledge the alarm condition and silence the buzzer while in an alarm 2
condition, press and release the reset switch. The alarm 2 LED will begin to flash
indicating the alarm condition has been acknowledged. You cannot de-energize the
alarm 2 relays until the gas reading falls below the alarm 2 setpoint.
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