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XPDM Manual Table of Contents
1. Introduction ...................................................................................................................................... 4
2. Precautions ....................................................................................................................................... 5
3. Principle of Operation ...................................................................................................................... 6
4. Operating the XPDM ....................................................................................................................... 8
4.1. Sample Hook-up ........................................................................................................................ 8
4.1.1. Fittings ................................................................................................................................ 8
4.1.2 Recommended Pipes ........................................................................................................... 8
4.1.3. Sample conditioning ........................................................................................................... 8
4.2. Measuring .................................................................................................................................. 8
5.0 The User Interface ........................................................................................................................ 10
5.1 Display Conventions ................................................................................................................ 10
5.2 Operating State ......................................................................................................................... 11
5.2.1 Viewing Dewpoint Mode .................................................................................................. 11
5.2.2 Viewing Temperature at the Sensor .................................................................................. 12
5.2.3 Start Autocal Mode ........................................................................................................... 12
5.3 Set-up State .............................................................................................................................. 13
6. Options ........................................................................................................................................... 14
6.1 RS-232C ................................................................................................................................... 14
6.3 Operating from an external Power Supply ............................................................................... 16
7. Automatic Calibration .................................................................................................................... 17
8. Changing desiccant cartridge and/or battery. ................................................................................. 18
8.1 Changing the battery ................................................................................................................ 19
9 Special Conditions for Safe Use ...................................................................................................... 19
10. Special messages, warnings and error indications ....................................................................... 20
Apendix A: Flow Diagram of User Interface in Operating State ....................................................... 21
Appendix B: Flow Diagram of User Interface in Setup State ............................................................ 22
Appendix C: Releationship of Instrument Reading and 4-20ma output when lds of H
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O/million
standard cft or ppmv engineering units are selected . ........................................................................ 24
Appendix D: Uncertainty in LBS and PPMV calculations ................................................................ 25
Appendix E: Battery Life ................................................................................................................... 26
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