Neutronics 1100 - ALARM-1 ACTIVE Mode; ALARM-2 ACTIVE Mode; FAULT ACTIVE Mode

Model 1100 Operations Manual
Manual Part Number:
C5-06-4900-01-0
Manual File Name:
MN-A-0004
Manual Revision Level: E
ECO: 9760
Page 26
3.3.3 ALARM-1 ACTIVE Mode
The model 1100 initiates Alarm-1 Active mode when it has detected that the measured oxygen
concentration has exceed the set threshold value of Alarm-1 (section 3.2.2). The “ALM1” indicator
LED will light, The “RUN” indicator LED will remain lit. The Alarm-1 relay will change state
according to the analyzer configuration (Appendix C, Factory Setup). The Alarm status will be
cleared automatically when the measured oxygen concentration is within the set threshold value of
Alarm-1. The “ALM1” indicator LED will go out, and the Alarm-1 relay will return to its non-active
state according to the analyzer configuration. The Alarm-1 Active mode held to its last state during
manual access to the user mode menu.
3.3.4 ALARM-2 ACTIVE Mode
The model 1100 initiates Alarm-2 Active mode when it has detected that the measured oxygen
concentration has exceed the set threshold value of Alarm-2 (section 3.2.3). The “ALM2” indicator
LED will light, The “RUN” indicator LED will remain lit. The Alarm-2 relay will change state
according to the analyzer configuration (Appendix C, Factory Setup). The Alarm status will be
cleared automatically when the measured oxygen concentration is within the set threshold value of
Alarm-2. The “ALM2” indicator LED will go out, and the Alarm-2 relay will return to its non-active
state according to the analyzer configuration. The Alarm-2 Active mode is held to its last state
during manual access to the user mode menu.
3.3.5 FAULT ACTIVE Mode
The model 1100 initiates Fault Active mode when it has detected that one or more Fault criterion
have been satisfied (section 4.3.1). The “FAULT” indicator LED will light and the Fault relay will
change state. The Fault status will be cleared automatically when no Fault criterion have been
satisfied. The “FAULT” indicator LED will go out and the Fault relay will return to its non-active
state. The user may view active faults at any time from the control panel (section 3.2.4).
Faults can include an analog overflow, checksum error or disconnected sensor.