COSA Xentaur Xentaur XPDM - Manual (Page 3)

page iii
XPDM Manual Table of Contents
1. Introduction ................................................................................................................... 1
2. Precautions ................................................................................................................... 2
3. Principle of Operation ................................................................................................... 3
4. Operating the XPDM..................................................................................................... 5
4.1. Sample Hook-up ........................................................................................................ 5
4.1.1. Fittings .................................................................................................................... 5
4.1.2 Recommended Pipes............................................................................................... 5
4.1.3. Sample conditioning................................................................................................ 5
4.2. Measuring .................................................................................................................. 5
5.0 The User Interface ...................................................................................................... 7
5.1 Display Conventions ................................................................................................... 7
5.2 Operating State........................................................................................................... 8
5.2.1 Viewing Dewpoint Mode .......................................................................................... 8
5.2.2 Viewing Temperature at the Sensor ........................................................................ 9
5.2.3 Start Autocal Mode .................................................................................................. 9
5.2.4 Viewing Serial Number Mode .................................................................................. 9
5.3 Set-up State .............................................................................................................. 10
6. Options........................................................................................................................ 11
6.1 RS-232C ................................................................................................................... 11
6.2 Current Loop Output ................................................................................................. 12
6.3 Operating from an external Power Supply ................................................................ 13
7. Automatic Calibration.................................................................................................. 14
8. Changing desiccant cartridge and/or battery. ............................................................. 15
9. Special messages, warnings and error indications..................................................... 16
Appendix A: Flow diagram of User Interface in the Operating State .............................. 17
Appendix B: Flow Diagram of User Interface in the Set-Up State .................................. 18
Appendix C: Relationship of Instrument Reading and 4-20mA output when lbs of H20/million stan-
dard cft or ppmv engineering units are selected. ............................................................ 19
Appendix D: Uncertainty in LBS and PPMV calculations................................................ 20
Appendix E: Battery Life ................................................................................................. 21