2 DF-745 Table of Contents
7.4.3 Calibrate Menu........................................................................................38
7.4.4 Data History Routine............................................................................... 42
7.4.5 Data Downloader Routine........................................................................44
7.4.6 View Logs Menu..................................................................................... 46
7.4.7 Analyzer Setup........................................................................................ 49
7.4.8 Analog Output Setup............................................................................... 55
7.4.9 Graph Setup............................................................................................ 56
7.4.10 Diagnostics Menu................................................................................ 56
7.4.11 Adjust Contrast....................................................................................62
7.4.12 Power Up Default –Optional............................................................... 63
7.4.13 Date/Time............................................................................................64
7.4.14 Communications..................................................................................65
7.4.15 Download System Data........................................................................ 65
7.4.16 System Info..........................................................................................67
8Sample Gas Preparation and Delivery.................................69
8.1 Introduction..........................................................................................................69
8.2 Sample Flow Rate and Pressure............................................................................ 69
8.3 Flow Rate Effects on Sensor Performance.............................................................69
8.4 Sample Gas Scale Factor...................................................................................... 69
8.4.1 Background Gas Effects on Indicated Flow Rate...................................... 69
8.5 Flammable Sample Gas........................................................................................ 70
9Service.................................................................................... 71
9.1 Return Material Authorization number................................................................. 71
9.2 Maintenance.........................................................................................................71
9.2.1 Storage Conditions.................................................................................. 71
9.2.2 Moisture Cell Maintenance......................................................................71
9.2.3 Vacuum Pump Maintenance.................................................................... 71
9.3 Replaceable Parts List...........................................................................................73
9.4 Troubleshooting the DF–745 NanoTrace Analyzer............................................... 75
10 Theory of Operation.............................................................. 77
10.1 The Moisture Measurement.................................................................................77
10.1.1 Moisture and the IR Spectrum..............................................................77
10.1.2 Absorption Spectroscopy......................................................................78
11 Safety...................................................................................... 79
11.1 General Warnings...............................................................................................79
12 Warranty................................................................................. 81
13 Index....................................................................................... 83
14 Appendix A –User Menu Screens........................................ 85
15 Appendix B –Hydrogen Service Safety System................. 89
15.1 Instrument.......................................................................................................... 89
15.2 Vacuum Pump.................................................................................................... 89
15.3 Installation..........................................................................................................89
15.4 Operation............................................................................................................90