Honeywell CM4 Technical Handbook page 107

CM4 Four-Point Continuous Monitor
9.5 Cleaning the Chemcassette
See Figures 9-10 and 9-11
Clean Chemcassette optics annually or whenever an optics verification
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error occurs.
Instructions
1. Turn off power to the CM4.
2. Open the tape load lever and remove the Chemcassette
3. Unscrew two screws on the top panel and lift it. The panel
pivots on studs as shown in Figure 9-10.
4. Tighten the retaining knob to hold the panel open.
5. Release, then remove the pressure transducer port tubing from
the optics block (see
NOTE:
Remove and clean one port at a time to ensure proper orientation
of tubing. Do not remove the capillary tubing (microtubing).
6. Insert the tube of a small can of compressed air for optics
cleaning into the port and spray for three or four seconds.
7. Reconnect the pressure transducer port tubing. Repeat steps
4, 5 and 6 for remaining ports.
CAUTION
Failure to replace and retighten hardware after servicing can adversely
affect instrument performance and electromagnetic radiation
compliance (EMC). Make certain all fasteners are reinstalled and
firmly tightened. This will ensure a proper ground.
8. Close the panel and secure it with the screws.
9. Load the Chemcassette
10. Turn on power to the CM4.
CM4 Technical Manual
Optics
®
Figure 9-11).
carrier and close the load lever.
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carrier.
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1 Lift top panel
2 Tighten retaining knob on inside panel
9-12
1
2
Figure 9-10: Accessing Chemcassette
Legend
3 Studs
3
3
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Optics