RKI Instruments Beacon 410 - Manual (Page 31)

Beacon 410 Gas Monitor Operator’s Manual Alarm Indications • 27
NOTE: You can set the channel alarm relays and the common/channel alarm relays
(relays A, B, C, and D) to be either all normally energized or all normally de-
energized in the Global Menu. You can also set relays A, B, C, and D as common
alarm relays or channel alarm relays in the Global Menu. The following sections
describe the factory settings of normally de-energized for the channel and
common/channel relays (A, B, C, and D) and common alarm relays for relays A,
B, C, and D. The fail relay is factory-set as normally energized and is not user
adjustable. See “Viewing and Changing Global Parameters” on page 32 for
instructions to change the setup of relays A, B, C, and D.
Alarm 1 Condition
This section describes the indications for an alarm 1 condition and suggests responses to
an alarm 1 condition.
Alarm 1 Condition Indications
When the gas reading of an active channel reaches the alarm 1 setpoint, the Beacon 410
senses an alarm 1 condition. The Beacon 410 alerts you to an alarm 1 condition as
follows:
• the alarm 1 LED turns on
• the gas reading in alarm 1 condition alternates with the ALARM-1 message
• the buzzer sounds a pulsing tone
• the common alarm 1 relay (relay A) and relay D energize
Alarm 3 Increasing (decreasing for O
2
) gas
reading at or above (below for O
2
)
the alarm 3 setpoint
• Alarm 1, alarm 2, and alarm 3
LEDs (alarm 1 and alarm 3 for
oxygen) are on
• Gas reading alternates with
ALM 1,2,3 (ALM 1,3 for oxygen)
message
• If installed, strobe continues to
flash if set to activate for alarm 1
and/or alarm 2 for non oxygen
type channels or alarm 1 for
oxygen channels. If set to
activate for alarm 3 only, it
begins to flash when an alarm 3
condition begins.
Pulsing
tone
Fail • Disconnected or misconnected
detector head wiring
• Display reading below -10% of full
scale or lower
• Malfunctioning components
• Fail LED is on
• FAIL message replaces the gas
reading
• If installed and set to activate for
fail, strobe flashes
NOTE: There is a 30 second
delay on the fail indications.
Steady
tone
Low
Battery No AC power and DC power source
(primary or backup) less than 18.5
volts. • FAIL LED is on
• Display shows LOW POWER
STANDBY message and the
input DC voltage
None
Table 5: Visual and Audible Alarm Indications
Condition Cause Visual Indication(s)
Audible
Indication