Spectrex Xenon 700 SIL Open-Path Gas Detection System - Manual (Page 28)

SafEye TM Xenon 700S SIL Gas Detector
16 Operation Modes
3.1.3 Fault Mode
In the Fault status, there are three fault types:
 Fault 1 (2mA Output) – Non critical: If this occurs, it is due to
blockage, poor alignment, very low signal or in the case of partial
obscuration or full beam block and detection is no longer possible.
The Detector’s proper operation can be restored (Auto reset) during
operation if the condition causing the problem is removed or resolved.
This mode will occur after a delay of 60 sec. from the moment of the
fault. This delay is important to eliminate momentary obscuration due to
passing through the beam.
 Low Voltage Fault (0mA Output):In this case, detection is disabled
due to low voltage being supplied to the Detector. The Detector returns
to proper operation only when proper voltage level restored.
 Fault 2 (0mA Output) – Critical: In this case, the detection is
disabled due to electrical / software operational failure or central device
(memory, processor) fault. Such fault causes the Detector to cease
operation.
3.1.4 Zero Calibration Mode (1mA Output)
This mode zeros the base level from which the Detector will read gas.
It should only be performed when there are:
 No combustible gases present
 Clear path between the Flash Source and Detector
 Clear weather conditions
Zero calibration must be done after installation, re-alignment and window
cleaning, using the handheld unit (or Host software on PC)