Health Mode Alarm
The Health Mode Alarm is a feature that can be used to determine when preventative maintenance should be scheduled to ensure reliable
sensing. The Health Mode output 2 is Active when the system is OK and operating normally. The Health Mode output 2 becomes Inactive
when the system is in a marginal state because of contamination. The system still operates normally and can detect small objects, but is
nearing the alarm state. When the system is completely contaminated and unable to ensure reliable sensing, the system goes into the alarm
state. In the alarm state, the discrete output 1 is forced to the blocked state and can no longer be used to detect small objects.
The sensor may enter Health Mode Alarm for any of the following four reasons:
1. The sensor may be in Health Mode Alarm when first powered up. This is possible if the fiber optic array is already contaminated at
sensor power-up.
2. The sensor will enter Health Mode Alarm if the Window SET procedure fails. This indicates the fiber optic array is contaminated and the
sensor could not set a valid clear-state light level for reliable detection.
3. The sensor will enter Health Mode Alarm if the fiber optic array becomes contaminated to a point that the auto compensation tracking
algorithm cannot sufficiently adjust the thresholds to ensure reliable detection.
4. The sensor will enter Health Mode Alarm if the fiber optic array has been blocked for greater than 2 seconds.
In any case, the system can be returned to normal operation by cleaning the fiber optic array of contamination and performing a Window SET
to reset the clear-state light level (page 7).
The Health Mode Alarm is a feature that can be used to determine when preventative maintenance should be scheduled to ensure reliable
sensing. The Health Mode output 2 is Active when the system is OK and operating normally. The Health Mode output 2 becomes Inactive
when the system is in a marginal state because of contamination. The system still operates normally and can detect small objects, but is
nearing the alarm state. When the system is completely contaminated and unable to ensure reliable sensing, the system goes into the alarm
state. In the alarm state, the discrete output 1 is forced to the blocked state and can no longer be used to detect small objects.
The sensor may enter Health Mode Alarm for any of the following four reasons:
1. The sensor may be in Health Mode Alarm when first powered up. This is possible if the fiber optic array is already contaminated at
sensor power-up.
2. The sensor will enter Health Mode Alarm if the Window SET procedure fails. This indicates the fiber optic array is contaminated and the
sensor could not set a valid clear-state light level for reliable detection.
3. The sensor will enter Health Mode Alarm if the fiber optic array becomes contaminated to a point that the auto compensation tracking
algorithm cannot sufficiently adjust the thresholds to ensure reliable detection.
4. The sensor will enter Health Mode Alarm if the fiber optic array has been blocked for greater than 2 seconds.
In any case, the system can be returned to normal operation by cleaning the fiber optic array of contamination and performing a Window SET
to reset the clear-state light level (page 7).
Programming Procedures
Two push buttons, Dynamic (+) and Static (-), may be used to access and set programming parameters. For remote programming, connect a
switch or digital input to the gray wire (remote line); length of the individual pulses is equal to the value T:
0.04 seconds ≤ T ≤ 0.8 seconds
Returning to RUN mode
SETUP mode may be exited in one of three ways: by stepping through the entire Setup process (see pages 5-6), by escaping out of the Setup
process, or by exceeding the 60 second inactivity time-out. To escape out of the Setup process, press and hold both the Static (-) and Dynamic
(+) buttons concurrently for 2 seconds. (For remote programming, press and hold the remote line for 2 seconds). The sensor will always save
the selected settings and return to RUN mode.
