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Model T101 Instruction Manual Instrument Maintenance
205
8.3.4. CHANGING THE EXTERNAL ZERO AIR SCRUBBER
The chemicals in the external scrubber need to be replaced periodically according to
Table 9-1 or as needed. This procedure can be carried out while the instrument is
running. Make sure that the analyzer is not in ZERO calibration mode.
1. Locate the scrubber on the outside rear panel. Figure 9-2 shows an
exploded view of the scrubber assembly.
Figure 8-2. Charcoal Canister Assembly
2. Remove the old scrubber by disconnecting the 1/4” plastic tubing from
the particle filter using 9/16” and 1/2" wrenches.
3. Remove the particle filter from the cartridge using 9/16” wrenches.
4. Unscrew the top of the scrubber canister and properly disposition the
charcoal contents in accordance with local laws about discarding these
chemicals. The rebuild kit (listed in Appendix B) comes with a Material
and Safety Data Sheet, which contains more information on these
chemicals.
5. Refill the scrubber canister with charcoal.
6. Place a retainer pad over the charcoal, and then close the cartridge with
the screw-top cap.
7. Tighten the cap on the scrubber - hand-tight only.
8. Replace the DFU filter with a new unit and discard the old.
9. Replace the scrubber assembly into its clips on the rear panel.
10. Reconnect the plastic tubing to the fitting of the particle filter.
11. Adjust the scrubber cartridge such that it does not protrude above or
below the analyzer in case the instrument is mounted in a rack. If
necessary, squeeze the clips for a tighter grip on the cartridge.
07266B DCN6485