RKI Instruments Beacon 410 - Manual (Page 32)

28 • Alarm Indications Beacon 410 Gas Monitor Operator’s Manual
NOTE: Relay D is factory set as a common any alarm relay.
• 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. Oxygen alarms are factory set as self-resetting and will automatically clear when the
oxygen reading rises above the alarm 1 setpoint.
4. Alarms for all other gas types are factory set as latching. After the gas reading falls
below 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,