Emerson Rosemount CCO 5500, Reference Manual

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7. Remove the four M6 bolts that secure the detector stack components.
8. Observe the orientation of the gas cell assembly in the detector stack.
9. Slide the gas cell assembly out of the detector stack.
10. Replace the gas cell using the same orientation observed in Step 8 .
(The notch in the gas cell assembly should be nearest to the large circuit board
secured to the detector stack).
11. Place the end detector on top of the detector stack.
CAUTION!
EQUIPMENT DAMAGE
Do not overtighten the detector stack mounting bolts. Over-tightening the mounting
bolts may fracture the gas cell.
12. Install and gently tighten the M6 mounting bolts removed in Step 7 .
13. Position the side detector against the receiver stack. Install and tighten the M4x16
side detector mounting screws.
14. Line up and install the window plate onto the receiver unit. Fully seat the window
plate flange in the receiver unit.
15. Secure the receiver unit to the air purge using the four screws removed in Step 2 .
Tighten the screws evenly.
16. Power up and recalibrate the Rosemount CCO 5500 Analyzer.
Refer to Calibrate .
5.2.5 Electronics
The electronics require no routine maintenance. They are all solid state and undergo a
rigorous factory burn-in procedure. If there is any doubt about the electronics'
performance, interrogate the control unit from the keypad to determine whether or not
they are functioning properly.
Refer to Chapter 6 .
5.3 Adjust span factor
The span factor does not require periodic adjustment. However, if either of the following
repair actions are performed, you may need to adjust the span factor.
• Gas cell changed either in the receiver or source.
• Interference filter changed in the receiver.
Use the following procedure to adjust the span factor.
Maintenance
88 Rosemount CCO 5500