Detcon DM-700 - Page 3

Model DM-700
Model DM-700 iii
Table of Contents
1. Introduction ..................................................................................................................................................1
1.1 Description.......................................................................................................................................... 1
1.2 Sensor Electronics Design .................................................................................................................. 2
1.3 Modular Mechanical Design............................................................................................................... 3
1.4 Intelligent Plug-in Electrochemical Gas Sensor ................................................................................. 4
2. Installation ....................................................................................................................................................5
2.1 ATEX Operational Guidelines for Safe Use....................................................................................... 5
2.2 Sensor Placement ................................................................................................................................ 6
2.3 Sensor Contaminants and Interference ............................................................................................... 7
2.4 Mounting Installation.......................................................................................................................... 7
2.5 Electrical Installation ........................................................................................................................ 10
2.6 Field Wiring ...................................................................................................................................... 11
2.7 Initial Start Up................................................................................................................................... 13
2.7.1 Toxic Gas Sensors ........................................................................................................................ 13
2.7.2 O
2
Deficiency Sensors .................................................................................................................. 14
3. Operation ....................................................................................................................................................15
3.1 Programming Magnet Operating Instructions................................................................................... 15
3.2 Operator Interface ............................................................................................................................. 16
3.3 Normal Operation ............................................................................................................................. 17
3.4 Calibration Mode .............................................................................................................................. 18
3.4.1 AutoZero....................................................................................................................................... 18
3.4.2 AutoSpan ...................................................................................................................................... 18
3.5 Program Mode .................................................................................................................................. 21
3.5.1 View Sensor Status....................................................................................................................... 21
3.5.2 Set AutoSpan Level ...................................................................................................................... 22
3.5.3 Set Serial ID ................................................................................................................................. 23
3.5.4 Set Range...................................................................................................................................... 23
3.5.5 Signal Output Check..................................................................................................................... 24
3.5.6 Restore Factory Defaults .............................................................................................................. 24
3.6 Program Features .............................................................................................................................. 25
3.6.1 Operational Features..................................................................................................................... 25
3.6.2 Fault Diagnostic/Failsafe Features ............................................................................................... 26
4. RS-485 Modbus™ Protocol .......................................................................................................................29
Content Description.............................................................................................................................................29
5. Service and Maintenance............................................................................................................................31
5.1 Calibration Frequency....................................................................................................................... 31
5.2 Visual Inspection .............................................................................................................................. 31
5.3 Condensation Prevention Packet....................................................................................................... 31
5.4 Replacement of Intelligent Plug-in Sensor ....................................................................................... 31
5.5 Replacement of ITM ......................................................................................................................... 32
5.6 Replacement of DM-700 Sensor Assembly...................................................................................... 33
6. Troubleshooting Guide...............................................................................................................................34
7. Customer Support and Service Policy ........................................................................................................37
7.1 Warranty Notice................................................................................................................................ 37
8. DM-700 Sensor Warranty ..........................................................................................................................38
9. Appendix ....................................................................................................................................................39
9.1 Specifications.................................................................................................................................... 39
9.2 Interference Table ............................................................................................................................. 42
9.3 Proper Application and Maintenance of Acrylonitrile Sensor .......................................................... 48
9.4 Spare Parts, Sensor Accessories, Calibration Equipment ................................................................. 48
10. Revision Log ..........................................................................................................................................50