CM4 Four-Point Continuous Monitor
CM4 Technical Manual
9-9
9.3.1 CM4 Internal Filter Replacement Procedure
See Figure 9-6
1
2
3
4
4
5
Figure 9-6: Filter Maintenance
Legend
1
Filter block
4
Particulate Filters
2
Filter block handle
5
Acid scrubbing filter
3
Gray ring
The Model CM4 will use one of the filter blocks shown in Figure 9-7.
Note the positions of the filters for your type of filter block. The filter
block is keyed to fit only one way into the instrument.
1
2
4
Vacuum
Vacuum
1
3
3
Acid
Chamfer
Chamfer
Acid
2
4
Filter Assembly Type 1:
Filter Assembly Type 2:
Figure 9-7: Filter Block Orientation
The following steps apply to all filters located within the CM4. Refer
to these steps when performing maintenance on any filters in the
system.
1. Open the tape load lever to the servicing position.
2. On older model CM4’s, release carrier retaining clip by pressing
toward rear of unit.
3. Remove the Chemcassette
®
carrier by placing your fingers
under it, palms up, and lifting straight up. See
proper procedure.
NOTE:
To avoid carrier torque and damage, do not tilt the carrier. Contact
Honeywell Analytics if you are unable to remove the carrier.
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