Spectrex SafEye 300 Series, User Manual, Page: 22 / 80

Visual Indicator LEDs
22 SafEye TM Open Path Detection System User Guide
3.4 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 paths between the light source and detector
• Clear weather conditions
Zero calibration must be performed after installation, re-alignment, and
window cleaning, using magnetic mode selection.
3.5 Mode Selection
A magnetic mode selector is used to change to alignment and calibration
modes by placing the magnet on the side of the detector (Figure 16).
3.6 Visual Indicator LEDs
There are 2 indicators (LEDs) located in the detector’s front window,
referred to as the right and left LEDs. They display red, orange, and green
lights
that can be either “On” steady , flashing, or “Off.”