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Teledyne API Model 200A NO
X
Analyzer Instruction Manual, 02246, Rev. G, DCN 5247
NOTE
If the instrument is to be turned off for more than 8 hours, the
perm tube must be removed from the IZS oven. Even at room
temperature the perm tube continues to release NO
2
. Concentrations
can build up to very high levels inside the instrument causing
contamination and high background readings.
8.5 Replacing the IZS Zero Air Scrubber
The IZS zero air scrubber is located on the rear panel of the instrument. Refer to Table 8-8-1 for
recommended replacement interval. The entire cartridge can be replaced, or just the charcoal and
Purafil inside the cartridge. To replace the scrubber materials:
1.
Disconnect the scrubber from the rear panel pneumatic fitting and remove from the hold
down clip. While removing the cartridge, check the DFU filter for contamination and dirt,
replace if necessary.
2.
Unscrew the top, remove the felt pad and empty the contents.
3.
Inspect the upper and lower felt pads for signs of plugging, replace if necessary.
4.
Replace with 50% Purafil(upstream) and 50% charcoal (downstream).
5.
Re-install felt pad, screen and re-tighten cap. Make sure the o-ring in the cap is in good
shape and squarely seated.
6.
Leak check the assembly, then re-attach scrubber to fitting and clip on rear panel.
8-6
PRINTED DOCUMENTS ARE UNCONTROLLED