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able of Contents 6888Xi Advanced Electronics Instruction Manual
December 2012 PN 51-6888Xi
3.7 Parameter Setup ........................................................................................................48
3.7.1 Test Gas Values..............................................................................................48
3.7.2 Test Gas Times...............................................................................................53
3.7.3 Output Tracking During Calibration..............................................................54
3.7.4 Tolerance Check............................................................................................54
3.7.5 Alarm Relay Output Configuration................................................................55
3.7.6 Analog Output Configuration....................................................................... 57
3.7.7 Autocalibration............................................................................................. 58
3.7.8 Calibration Recommended Setup. ............................................................... 58
3.7.9 Calibration Acknowledged Setup................................................................. 59
3.7.10 Plug Diffuser Diagnostic................................................................................59
3.7.11 Low Temperature Set Point. ..........................................................................61
3.8 Calibration - General ..................................................................................................62
3.8.1 General..........................................................................................................62
3.8.2 Calibration Procedure ...................................................................................62
3.8.3 Calibration Log..............................................................................................67
3.8.4 Reset Calibration...........................................................................................67
3.9 D/A Trim. ...................................................................................................................68
Section 4: Troubleshooting
4.1 Overview of Operating Principles...............................................................................71
4.2 General.......................................................................................................................72
4.2.1 Grounding.....................................................................................................72
4.2 .2 Electrical Noise..............................................................................................72
4.2.3 Electrostatic Discharge..................................................................................72
4.3 Alarm Indications .......................................................................................................72
4.4 Identifying and Correcting Fault Indications...............................................................73
4.5 Calibration Passes, But Still Reads Incorrectly.............................................................74
4.5.1 Probe Passes Calibration, O
2
Still Reads High ................................................75
4.5.2 Probe Passes Calibration, O
2
Still Reads Low..................................................76
4.5.3 How do I detect a plugged diffuser?..............................................................76
4.5.4 Can I calibrate a badly plugged diffuser?.......................................................76
Section 5: Maintenance and Service
5.1 Overview....................................................................................................................79
5.2 Maintenance Intervals ................................................................................................79
5.3 Calibration..................................................................................................................80
5.3.1 Automatic Calibration...................................................................................80
5.3.2 Manual Calibration........................................................................................80
5.4 Replacement Parts .....................................................................................................81
5.5 6888Xi Components Replacement ............................................................................81
5.5.1 I/O Board Replacement .................................................................................81
IV Table of Contents