Rosemount OCX 8800 - Page 7

Instruction Manual
IM-106-880, Rev 2.1
April 2017
OCX 8800
Status Handling ............................................................................. 7-44
Application Information .................................................................. 7-45
Application Examples .................................................................... 7-46
Troubleshooting ............................................................................. 7-51
Arithmetic (ARTHM) Function Block ................................................... 7-52
Block Errors ................................................................................... 7-54
Modes ............................................................................................ 7-55
Alarm Detection ............................................................................. 7-55
Block Execution ............................................................................. 7-55
Status Handling ............................................................................. 7-56
Application Information .................................................................. 7-56
Advanced Topics ........................................................................... 7-57
Troubleshooting ............................................................................. 7-59
Input Selector (ISEL) Function Block .................................................. 7-59
Block Errors ................................................................................... 7-61
Modes ............................................................................................ 7-61
Alarm Detection ............................................................................. 7-62
Block Execution ............................................................................. 7-62
Status Handling ............................................................................. 7-62
Application Information .................................................................. 7-63
Troubleshooting ............................................................................. 7-64
Operation with Emerson DeltaV.......................................................... 7-65
About AMS and DeltaV Software ................................................... 7-65
SECTION 8
Troubleshooting
Overview ............................................................................................... 8-1
Grounding ........................................................................................ 8-1
Electrical Noise ................................................................................ 8-1
Electrostatic Discharge .................................................................... 8-1
Total Power Loss ............................................................................. 8-2
Diagnostic Alarms ................................................................................. 8-2
Fault Isolation ........................................................................................ 8-3
Alarm Relay Events............................................................................. 8-11
SECTION 9
Maintenance and Service
Overview ............................................................................................... 9-1
OCX 8800 Removal and Installation ..................................................... 9-1
OCX with Integral Electronics .......................................................... 9-2
OCX with Remote Electronics ......................................................... 9-5
Repair Sensor Housing ....................................................................... 9-10
Sensor Housing Disassembly ........................................................ 9-10
Sensor Housing Assembly ............................................................. 9-20
Repair Electronics Housing ................................................................. 9-29
Electronics Housing Disassembly .................................................. 9-29
Electronics Housing Assembly ...................................................... 9-31
Replace Tube Fittings ......................................................................... 9-35
Remove Tube Fittings .................................................................... 9-35
Install Tube Fittings ........................................................................ 9-36
SECTION 10
Replacement Parts
Sensor Housing................................................................................... 10-2
Electronics Housing ............................................................................ 10-6
O2 Cell and Heater Strut Assembly ....................................................10-9
TOC-3