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Detcon IR-700 User Manual
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INSTRUCTION MANUAL
Detcon Model IR
-
700
IR
-700 Combustible Gas Sensor
0-100%
LEL and 0
-
50% LEL
r
ange
IR
-
700 CO
2
Carbon Dioxide Gas Sensor
All Ranges
DETCON, Inc.
4055 Tec
hnology
Forest B
lvd
.,
The Woodlands
, Texas 77381
Ph.281.367.4
100 / Fax 281
.298.2868
www.detcon.
com
June 05, 2018
• Document #
3169
• Revision
4.3
2
Table of Contents
Default Chapter
3
Table of Contents
3
1 Introduction
5
Description
5
Non-Dispersive Infrared (NDIR) Optical Sensor Technology
5
Figure 1 Sensor Cell Construction
5
Principle of Operation
6
Performance Characteristics
6
Figure 2 Principle of Operation
6
Figure 3 Response Curve
6
Sensor Electronics Design
7
Intelligent Transmitter Module
7
Modular Mechanical Design
7
Figure 4 ITM Circuit Functional Block Diagram
7
Figure 5 Sensor Assembly Front View
7
Plug-In Replaceable Sensor
8
Figure 6 Sensor Assembly Breakaway
8
Figure 7 IR Sensor Cell
8
2 Installation
9
Operational Guidelines for Safe Use - Hazloc Certifications
9
Figure 8 Hazloc Certification Approval Label
9
Sensor Placement
10
Sensor Contaminants and Interference
11
Mounting Installation
11
Figure 9 Outline and Mounting Dimensions (Sensor Assembly Only)
12
Figure 10 Outline and Mounting Dimensions (Stainless Steel Junction Box)
13
Figure 11 Outline and Mounting Dimensions (Aluminum Junction Box)
13
Electrical Installation
14
Figure 12 Outline and Mounting Dimensions (Mini Stainless Steel Junction Box)
14
Field Wiring
15
Figure 13 Typical Installation
15
Figure 14 Sensor Wire Connections
16
Table 1 Wire Gauge Vs. Distance
16
Initial Start up
17
3 Operation
19
Programming Magnet Operating Instructions
19
Figure 15 Magnetic Programming Tool
19
Figure 16 Magnetic Programming Switches
19
Operator Interface
20
Normal Operation
21
Figure 17 IR-700 Software Flowchart
21
Calibration Mode (Autozero and Autospan)
22
Autozero
22
Autospan
22
Program Mode
24
View Sensor Status
25
Set Autospan Level
26
Set Gas Type& Range
27
Set Gas Factor
27
Set Serial ID
28
Table 2 Gas Factors
28
Set Sensor Gain
29
Signal Output Check
29
Restore Factory Defaults
30
Program Features
30
Operational Features
31
Fault Diagnostic/Fail-Safe Features
31
4 RS-485 Modbus™ Protocol
34
Content Description
34
Table 3 Modbus™ Registers
34
Table 4 Modbus™ Special Registers
35
5 Service and Maintenance
36
Calibration Frequency
36
Visual Inspection
36
Condensation Prevention Packet
36
Replacement of IR Plug-In Combustible Gas Sensor
36
Figure 18 Sensor Assembly
36
Replacement of ITM
37
Replacement of IR-700 Sensor Assembly
38
6 Troubleshooting Guide
39
7 Customer Support and Service Policy
42
8 IR-700 Sensor Warranty
43
9 Appendix
44
Specifications
44
Spare Parts, Sensor Accessories, Calibration Equipment
47
10 Revision Log
48
Model IR
48
4
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Detcon IR-700 Specifications
General
Brand
Detcon
Model
IR-700
Category
Accessories
Language
English
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