Wiring Configurations
28
SafEye™
Toxic and Aromatic Open-Path Gas Detection System
•
Low Voltage Fault (1mA Output)
Detection is disabled due to a low voltage supply. The detector returns to
proper operation when the correct voltage level is restored.
•
Fault 2 (1mA Output)
Detection is disabled due to an electrical/software operational failure, or to a
memory/processor fault. A fault of this type causes the detector to cease
operation.
If there is a fault in the 0
–
20mA loop, the output is 0mA.
4.1.4
Zero Calibration Mode (1mA Output)
This mode calibrates the base level, from which gas is detected, to zero.
It should only be performed when the following criteria are met:
•
No combustible gases are present
•
A clear path exists between the UV source and the detector
•
Clear weather conditions are present
Zero calibration must be performed after installation, re-alignment, or cleaning,
using the handheld unit or host software on a PC.
4.2
Visual Indicators
One 3-color LED indicator is located in the back of the detector/source and can be
seen through the back cover window (Figure 3 and Figure 4, Item 11).
The detector statuses are listed in Table 2.
Table 2: Detector LED Indications
Detector Status
LED Color
LED Mode
Fault
Yellow
4Hz, flashing
Alignment/Standby
Yellow
1Hz, flashing
Zero Calibration
Yellow
Constant
Normal
Green
1Hz, flashing
Warning
Red
2Hz, flashing
Alarm
Red
Constant