Detcon DM-700 - Manual (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 .......................................................................................................................... 8
2.6 Field Wiring ........................................................................................................................................ 9
2.7 Initial Start Up................................................................................................................................... 11
2.7.1 Toxic Gas Sensors ........................................................................................................................ 11
2.7.2 O
2
Deficiency Sensors .................................................................................................................. 12
3. Operation ....................................................................................................................................................13
3.1 Programming Magnet Operating Instructions................................................................................... 13
3.2 Operator Interface ............................................................................................................................. 14
3.3 Normal Operation ............................................................................................................................. 15
3.4 Calibration Mode .............................................................................................................................. 16
3.4.1 AutoZero....................................................................................................................................... 16
3.4.2 AutoSpan ...................................................................................................................................... 16
3.5 Program Mode .................................................................................................................................. 19
3.5.1 View Sensor Status....................................................................................................................... 19
3.5.2 Set AutoSpan Level ...................................................................................................................... 21
3.5.3 Set Serial ID ................................................................................................................................. 21
3.5.4 Set Range...................................................................................................................................... 21
3.5.5 Signal Output Check..................................................................................................................... 22
3.5.6 Restore Factory Defaults .............................................................................................................. 22
3.6 Program Features .............................................................................................................................. 23
3.6.1 Operational Features..................................................................................................................... 23
3.6.2 Fault Diagnostic/Failsafe Features ............................................................................................... 24
4. RS-485 Modbus™ Protocol .......................................................................................................................27
Content Description.............................................................................................................................................27
5.
Service and Maintenance............................................................................................................................29
5.1 Calibration Frequency....................................................................................................................... 29
5.2 Visual Inspection .............................................................................................................................. 29
5.3 Condensation Prevention Packet....................................................................................................... 29
5.4 Replacement of Intelligent Plug-in Sensor ....................................................................................... 29
5.5 Replacement of ITM ......................................................................................................................... 30
5.6 Replacement of DM-700 Sensor Assembly...................................................................................... 31
6. Troubleshooting Guide ...............................................................................................................................32
7. Customer Support and Service Policy ........................................................................................................35
7.1 Warranty Notice................................................................................................................................ 35
8. DM-700 Sensor Warranty ..........................................................................................................................36
9. Appendix ....................................................................................................................................................37
9.1 Specifications.................................................................................................................................... 37
9.2 Interference Table ............................................................................................................................. 40
9.3 Proper Application and Maintenance of Acrylonitrile Sensor.......................................................... 46
9.4 Spare Parts, Sensor Accessories, Calibration Equipment ................................................................. 47
9.5 Model DM-700 Engineering Drawings ............................................................................................ 47