Spectrex Series 300 Open-Path Gas Detection System - Manual (Page 5)

Spectrex Inc. - SafEye TM 300 Gas Detector Manual – TM 794100, Rev. D, May 2004
I
T ABLE OF CONTENTS
1. Scope ............................................................................................................................1
1.1 Product Overview................................................................................................... 1
1.2 Document Overview................................................................................................ 1
2. Technical Description...............................................................................................2
2.1 Features.................................................................................................................... 2
2.2 Applications ............................................................................................................. 2
2.3 Principle of Operation............................................................................................ 2
2.3.1 Definitions of Terms .......................................................................................... 3
2.3.2 Spectral Finger Print .......................................................................................... 3
2.3.3 Optical Path........................................................................................................ 3
2.3.4 Microprocessor Based........................................................................................ 3
2.3.5 Gas Sensitivity ................................................................................................... 4
2.3.6 Gas and Mixture Selection and Setting .............................................................. 4
2.4 Product Marking..................................................................................................... 5
2.5 Models and Types ................................................................................................... 5
2.6 Description.............................................................................................................. 6
2.6.1 Light Source Unit ............................................................................................... 6
2.6.2 Detector Unit (Figure 2)..................................................................................... 7
3. Operation Mode..........................................................................................................8
3.1 Normal Mode........................................................................................................... 8
3.2 Fault Mode............................................................................................................... 8
3.3 Alignment Mode ...................................................................................................... 8
3.4 Zero Calibration Mode (1mA Output) ................................................................. 8
3.5 Mode Selection......................................................................................................... 9
3.6 Visual Indications LEDs ......................................................................................... 9
3.7 Output Signals ....................................................................................................... 10
3.7.1 4-20mA Current Output ................................................................................... 10
3.7.2 Relays............................................................................................................... 11
3.7.3 RS-485 Interface .............................................................................................. 11
3.8 Terminals ............................................................................................................... 12
3.8.1 Detector Terminal ............................................................................................ 12
3.8.2 Light Source Terminals.................................................................................... 14
3.9 System Setup.......................................................................................................... 15
3.9.1 Detector Setting................................................................................................ 15
4. Technical Specifications .......................................................................................19
4.1 General Specifications .......................................................................................... 19