RKI Instruments Beacon 410 - Manual (Page 33)

Beacon 410 Gas Monitor Operator’s Manual Alarm Indications • 29
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.
3. Oxygen alarms are factory set as self-resetting and will automatically clear when the
oxygen reading falls below the alarm 2 setpoint.
4. Alarms for all other gas types are factory set as latching. After the gas reading falls
below the alarm 2 setpoint, press and release the reset switch to reset the alarm
circuit. Resetting the alarm circuit silences the buzzer (if the alarm has not been
acknowledged) turns off the alarm 2 LED, resets the display for the channel(s) in
alarm, turns off the strobe if it is installed and set to activate for alarm 2 only or if a
channel is an oxygen channel, and de-energizes the common and channel alarm 2
relays. For oxygen channels, the reset switch also de-energizes
relay D.
Alarm 3 Condition
This section describes the indications for an alarm 3 condition and suggests responses to
an alarm 3 condition.
NOTE: The factory set configuration of the Beacon 410 does not assign channel relay
contacts to the alarm 3 condition. Relays A, B, C, and D are factory set as
common alarm relays, but can be configured as channel alarm 3 relays. See
“Viewing and Changing Global Parameters” on page 32 and “Viewing and
Changing Channel Parameters” on page 35 for instructions to change relays A,
B, C, and D from their factory setting.
Alarm 3 Condition Indications
When the gas reading of an active channel reaches the alarm 3 setpoint, the Beacon 410
senses an alarm 3 condition. The Beacon 410 alerts you to an alarm 3 condition as
follows:
• the alarm 3 LED turns on;
• the gas reading during an alarm 3 condition continues to flash and alternates with the
ALM 1,2,3
(ALM 1,3 for oxygen) message;
• the buzzer sounds a pulsing tone;
• the common alarm 3 relay (relay C) energizes
• if installed and set to activate for alarm 1 and/or alarm 2 for non-oxygen channels or
alarm 1 for oxygen channels, the strobe continues to flash
• if set to activate for alarm 3 only, it begins to flash when an alarm 3 condition begins
Responding to an Alarm 3 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 3
condition, press and release the reset switch. The ALARM 3 LED will begin to flash
indicating the alarm condition has been acknowledged. You cannot de-energize the