Wiring Configurations
54
SafEye™
Toxic and Aromatic Open-Path Gas Detection System
•
Short Range
: The minimum distance, as defined on the model number
•
Medium Range
: Half of the maximum distance, as defined on the model
number
•
Long Range
: The maximum distance, as defined on the model number
7.6
Zero Calibration
Zero calibration must be performed after any of the following:
•
Installation
•
Realignment
•
Window cleaning
•
Any change in detector or source position
Precise alignment must be performed prior to the zero calibration procedure.
Perform zero calibration in good weather conditions, with insignificant gas
concentrations in the surrounding environment, or indoors.
To perform the zero calibration procedure:
1
Switch from normal to alignment mode indication.
2
Switch from alignment to standby mode.
3
Switch from standby to zero Calibration mode.
4
The 0
–
20mA output should now be at 1mA.
5
Wait up to 60 seconds until the mode changes to normal and the detector
reading is normal.
The 0
–
20mA output now indicates 4mA.
Use the Host HART (refer to
Manual TM899030
) or RS-485 (refer to
Manual
TM899050
) to switch between each mode, or move the magnetic mode
selector above the magnetic switch (see Figure 9).