Alignment Mode
TM794200
Rev Ad, March 2019
21
3
Operation Mode
The SafEye system has 3 operation modes: Normal, Alignment, and Zero
Calibration.
3.1
Normal Mode
This mode is used for gas detection. The following status signals are
possible (see Table 2 for visual indications):
Normal
Signal received from gas detection is at safe levels.
Warning
Gases have been detected at warning levels.
Alarm
Gases have been detected at alarm levels.
3.2
Fault Mode
There are 3 fault types:
•
Fault 1 (2mA Output)
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 will 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 objects/people 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 is restored.
•
Fault 2 (0mA Output)
In this case, the
detection is disabled
due to an electrical/software
operational failure or a central device (memory/processor) fault. Such
faults cause the detector to cease operation.
3.3
Alignment Mode
This mode is used when the received signal needs to be measured (i.e.
installation and periodic maintenance). LED indications represent the
received signal strength for precise alignment. There is a temporary
standby mode to enable the option of switching from alignment mode to
calibration mode.
