Spectrex Series 200 Open-Path Gas Detection System - Manual (Page 5)

Spectrex Inc. - SafEye TM 200 Gas Detector Manual – TM 792100, 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 Mixtur e Selection and Setting.............................................................. 4
2.4 Product Marking..................................................................................................... 5
2.5 Models and Types ................................................................................................... 5
2.6 Description.............................................................................................................. 6
2.6.1 Flash Source Unit ............................................................................................... 6
2.6.2 Detector Unit (Figure 3)..................................................................................... 7
3. Operation Mode..........................................................................................................9
3.1 Normal Mode........................................................................................................... 9
3.2 Fault Mode............................................................................................................... 9
3.3 Alignment Mode ...................................................................................................... 9
3.4 Zero Calibration Mode (1mA Output) ................................................................. 9
3.5 Mode Selection....................................................................................................... 10
3.6 Visual Indications LEDs ....................................................................................... 10
3.7 Output Signals ....................................................................................................... 11
3.7.1 4-20mA Current Output ................................................................................... 11
3.7.2 Relays............................................................................................................... 12
3.7.3 RS-485 Interface .............................................................................................. 12
3.8 Terminals ............................................................................................................... 13
3.8.1 Detector Terminal ............................................................................................ 13
3.8.2 Flash Source Terminals.................................................................................... 15
3.9 System Setup.......................................................................................................... 16
3.9.1 Detector Setting................................................................................................ 16
3.9.2 Flash Source Setting ........................................................................................ 19
4. Technical Specifications .......................................................................................20