Model 100E Instruction Manual Instrument Maintenance
045150102 Rev XB1 159
9.3.2. Changing the IZS Permeation Tube
• Turn off the analyzer, unplug the power cord and remove the cover.
• Locate the IZS oven in the rear left of the analyzer.
• Remove the top layer of insulation if necessary.
• Unscrew the black aluminum cover of the IZS oven (3 screws) using a medium
Phillips-head screw driver. Leave the fittings and tubing connected to the cover.
• Remove the old permeation tube if necessary and replace it with the new tube.
Make sure that the tube is placed into the larger of two holes and that the open
permeation end of the tube (plastic) is facing up.
• Re-attach the cover with three screws and make sure that the sealing O-ring is
properly in place and that the three screws are tightened evenly.
• Replace the analyzer cover, plug the power cord back in and turn on the analyzer.
• Carry out an IZS span check to see if the new permeation device works properly.
The permeation rate may need several days to stabilize.
WARNING
Do not leave instrument turned off for more than 8 hours without removing the
permeation tube. Do not ship the instrument without removing the permeation
tube. The tube continues to emit SO2, even at room temperature and will
contaminate the entire instrument.
9.3.3. 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.
• Locate the scrubber on the outside rear panel. Figure 9-2 shows an exploded view
of the scrubber assembly.
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