Emerson Rosemount CT5400, Installation, Operation And Maintenance Manual

Page: 128 / 176

Prerequisites
All the laser modules are physically identical, but are NOT interchangeable as they differ in
internal settings. Each laser module is a sealed unit and can only be repaired by Emerson.
Repair therefore consists of removing the unserviceable laser module and returning it to
Emerson for repair.
Procedure
1. Power down the analyzer and allow to cool for two hours.
2. Lock-out tag-out the power circuit breaker.
3. Apply masking tape to the flanges, seal,and flamepath to protect them from
scratches, chipping, and other forms of damage or deformation.
4. Remove the twenty M16 captive bolts securing the enclosure and carefully open the
enclosure.
5. Unscrew the two 14 mm connections to the gas input and output lines (see
Section 7.21 and Section 7.22 ).
6. Remove the lower DIN rail as described in Section 7.17.3 .
Refer to Figure 7-28 to complete this procedure.
7. Disconnect the ribbon cable (E) and the captive screws (D and F).
Troubleshooting and diagnostics
108 Rosemount CT5400