4.8 O
2
calibration ............................................................................................................................ 45
4.8.1 O
2
calibration with Xi .................................................................................................. 46
4.8.2 O
2
calibration with Xi and Field Communicator ........................................................... 47
4.9 D/A trim .....................................................................................................................................48
4.9.1 D/A trim with Xi ...........................................................................................................48
Chapter 5 Troubleshooting .......................................................................................................... 49
5.1 Overview of operating principles ............................................................................................... 49
5.2 General ......................................................................................................................................50
5.2.1 Grounding ...................................................................................................................50
5.2.2 Electrical noise ............................................................................................................ 50
5.2.3 Electrostatic discharge ................................................................................................ 51
5.3 Alarm indications .......................................................................................................................51
5.4 Identifying and correcting fault indications ................................................................................52
5.5 Calibration passes, but still reads incorrectly ..............................................................................54
5.5.1 Probe passes calibration, O
2
still reads high .................................................................54
5.5.2 Probe passes calibration, O
2
still reads low .................................................................. 55
5.5.3 How do I detect a plugged diffuser? ............................................................................ 55
5.5.4 Can I calibrate a badly plugged diffuser? ......................................................................55
Chapter 6 Maintenance and service ..............................................................................................57
6.1 Overview ................................................................................................................................... 57
6.2 Maintenance intervals ................................................................................................................57
6.3 Calibration .................................................................................................................................58
6.3.1 Automatic calibration ................................................................................................. 58
6.3.2 Manual calibration ...................................................................................................... 58
6.4 Replacement parts .....................................................................................................................58
6.5 Xi components replacement ......................................................................................................58
6.5.1 I/O board replacement ................................................................................................60
6.5.2 AC relay board replacement ........................................................................................ 64
6.5.3 Power supply board replacement ................................................................................65
6.5.4 Xi front panel replacement ..........................................................................................67
6.5.5 DR board replacement ................................................................................................ 69
Chapter 7 Replacement parts ....................................................................................................... 73
7.1 Xi electronics ............................................................................................................................. 73
7.2 Calibration components ............................................................................................................ 74
Chapter 8 Optional accessories .................................................................................................... 75
8.1 HART handheld 375/475 Field Communicator ...........................................................................75
8.2 Asset Management Solutions (AMS) .......................................................................................... 76
8.3 By-Pass Packages ....................................................................................................................... 76
8.4 Rosemount SPS 4001B Single Probe Autocalibration Sequencer ................................................77
8.5 Rosemount IMPS 4000 Intelligent Multiprobe Test Gas Sequencer ............................................ 78
8.6 O
2
calibration gas ...................................................................................................................... 79
8.7 OxyBalance Display and Averaging System ................................................................................ 80
Appendices and reference
Appendix A XPS information ...........................................................................................................81
A.1 XPS equipment description ........................................................................................................81
A.1.1 Remote XPS for 44 V probes - 6A00358G01 ................................................................ 81
A.1.2 Remote XPS for 115 V probes - 6A00358G03 .............................................................. 82
Contents
ii Xi