Teledyne 6200T - Sulfides Analyzer - Manual (Page 229)

6200T Total Sulfur Analyzer Maintenance
Teledyen Analytical Instruments 229
4. Replace the filter element, carefully centering it in the bottom of the holder.
5. Re-install the PTFE O-ring with the notches facing up, the glass cover, then screw
on the hold-down ring and hand-tighten the assembly. Inspect the (visible) seal
between the edge of the glass window and the O-ring to assure proper gas
tightness.
6. Re-start the analyzer.
11.3.2. Changing the IZS Permeation Tube
1. Turn off the analyzer, unplug the power cord and remove the cover.
2. Locate the IZS oven in the rear left of the analyzer.
3. Remove the top layer of insulation if necessary.
4. 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.
5. Remove the old permeation tube if necessary and replace it with the new tube.
Ensure that the tube is placed into the larger of two holes and that the open
permeation end of the tube (Teflon) is facing up.
6. Re-attach the cover with three screws and ensure that the sealing O-ring is properly
in place and that the three screws are tightened evenly.
7. Replace the analyzer cover, plug the power cord back in and turn on the analyzer.
8. Carry out an IZS span check to see if the new permeation device works properly.
The permeation rate may need several days to stabilize.
5.
ATTENTION COULD DAMAGE INSTRUMENT AND VOID WARRANTY
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 gas, even at room
temperature and will contaminate the entire instrument.
11.3.3. Changing theTS and Zero Air Scrubber Materials
The 6200T has one standard charcoal scrubber on the rear panel of the SO
2
analyzer
instrument chassis, and another special charcoal scrubber inside the chassis. The zero
calibration (and thus the overall accuracy of the instrument) is dependent on high quality
zero air.
The chemicals in the external and internal scrubbers need to be replaced periodically
according to Table 11-1 or as needed. This procedure can be carried out while the
instrument is running. Ensure that the analyzer is not in either the ZERO or SPAN
calibration modes.
Make sure that the charcoal is replaced at the 3-month interval suggested in the
6400T maintenance schedule. Also be sure not to mix charcoal between the inner
and outer scrubber canisters, they are different materials.