Failure Diagnostics - Emerson Rosemount CT5800 Manual

Troubleshooting and diagnostics
September 2019
WARNING
BURNS
Some parts of the analyzer may be heated to 150 °F (65 °C). Failure to allow sufficient
cooling may cause serious burn injury to personnel.
Do not touch any part of the analyzer.
Assume all parts of the analyzer are hot unless it has been switched off and allowed to
cool down.
Always wear proper protective equipment when handling the analyzer.
Switch off the analyzer and allow it to cool for at least two hours before fitting,
removing, or performing any maintenance.
The analysis cell is insulated against heat loss. Allow the analyzer to cool for at least 12
hours before performing any maintenance on, or in the vicinity of, the analysis cell.
If burns occur, seek immediate medical treatment.
Procedure
1. Power down the analyzer and allow it to cool.
2. Open the front enclosure as described in
3. Visually examine the exterior of the analyzer for signs of damage.
4. Perform a visual inspection of the optical and electrical components inside the
5. If any loose connections are found in the electrical compartment, refer to the wiring
6. Refit the front housing (see
7.6

Failure diagnostics

If the BIT and the visual examination fail to identify the fault, perform the failure
diagnostics and recommended actions.
7.6.1 Gas reading abnormal
Check measurement validity flag. If the reading is invalid, refer to
flag. If the reading is valid:
Potential cause
Sensor required calibration.
Recommended action
Perform a new zero and span calibration to ensure calibration factors are correct.
Readings return to normal.
Potential cause
Unknown
104
analyzer.
diagrams (see Engineering
Opening the
Drawings) to identify and repair the connection.
Closing the enclosure ).
Reference Manual
00809-0100-5800
enclosure.
Measurement invalid
Emerson.com/Rosemount