Spectrex Series 300 Open-Path Gas Detection System - Manual (Page 17)

Spectrex Inc. - SafEye TM 300 Gas Detector Manual – TM 794100, Rev. D, May 2004
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Zero calibration must be done 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 Indications LEDs
There are two indicators (LEDs) located in the detector’s front window, referred
to as the right and left LEDs. They display red, orange and green light that can
be either ‘On’ steady or flashing or ‘Off’
Table 2. LED Status Indication
Status Remarks Left LED Right
LED
LED
Status
4-20mA
Output
Normal Green Off On 4 mA
Warning See Note 4 Red Off On 14 mA
Alarm See Note 4 Red Red On 19 mA
Fault 1 Orange Off On 2 mA
Fault 2 Orange Orange On 0 mA
Low
Voltage Orange Orange Both LEDs
flash at
rate of 2Hz 0 mA
First receives the
intensity compared
to the last
calibration: The
intensity is min.
80% of the last
calibration intensity
Green
Green
0 mA
80% - 60% Orange Green 0 mA
60% or less Red Orange 0 mA
Alignment
Mode
After 20 seconds
the color
represents the
signal intensity
(See Note 2). See Note
1 See Note
1 0 mA
Standby
mode Green Green Both LEDs
flash
alternately
at a rate of
2Hz. 0 mA
Calibration
mode See Note 3 Off Off 0 mA