RKI Instruments Beacon 410 User Manual
Page 34
30 • Alarm Indications
Beacon 410 Gas Monitor Operator’s Manual
common alarm 3 relay (relay C) until the gas reading falls below the alarm 3 setpoint.
3.
Oxygen alarms are factory set as self-resetting and will automatically clear when the
oxygen reading rises above the alarm 3 setpoint.
4.
Alarms for all other gas types are factory set as latching. After the gas reading falls
below the alarm 3 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 3 LED, and de-energizes the common alarm 3
relay.
Fail Condition
This section describes the indications for a fail condition and suggests responses to a fail
condition.
Fail Condition Indications
The Beacon 410 senses 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;
•
the Beacon 410 or one of it’s detector heads is malfunctioning.
When the Beacon 410 senses a fail condition, it alerts you as follows:
•
the fail LED turns on;
•
the gas reading for the failing channel is replaced by the FAIL message;
•
the buzzer sounds a steady tone;
•
the common fail relay de-energizes.
NOTE:
The fail alarm has a 30 second delay.
NOTE:
If you elect to use relays A, B, C, and D as channel fail relays in the Configuration
Menu, the appropriate relay de-energizes in a fail condition. Relays A, B, C, and
D correspond to channels 1, 2, 3, and 4. See “Viewing and Changing Channel
Parameters” on page 35 for a instructions to define channel fail relays.
Responding to a Fail Condition
This section suggests responses to a fail condition.
1.
Verify that the detector head wiring is correctly and securely connected.
2.
See the troubleshooting guide in “Troubleshooting” on page 64.
Low DC Power Condition
This section describes the audible and visual indications for a low DC power condition and
suggests responses to a low DC power condition. This condition only occurs when DC
power is used as the primary or a backup power source
Low DC Power Condition Indications
The Beacon 410 senses a DC low power condition when the DC power source is 18.5
volts or less.