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Model 9110T NOx Analyzer Instrument Maintenance
Teledyne Analytical Instruments 244
5. Holding the main dryer fitting steady with a 5/8” wrench and tighten the nut with your
hands.
If necessary use a second wrench but do not over-tighten the nut.
6. Replace the cover, plug in the power cord and restart the analyzer.
7. Check the O3 flow rate; it should be around 80 cm³/min ± 15.
8. Check the RCEL pressure.
It should be the same value as before.
9. Refer to Section 13.3.12 to leak check after installing the new DFU particle filter.
11.3.3. CHANGING THE OZONE CLEANSER CHEMICAL
The ozone (O
3
) cleanser is located next to the O
3
generator (see Figure 3-5) and cleans the O
3
stream
from solid and liquid contaminants that are created inside the O
3
generator. The content of the ozone
cleanser needs periodical exchange according to Table 11-1. A rebuild kit is available from the factory
(see Appendix B of this manual lists the part numbers).
To change the ozone cleanser chemical, follow these steps:
1. Turn of power to the analyzer and pump. Remove the analyzer cover and locate the
O
3
filter in the front of the analyzer next to the O
3
generator.
2. Use a 7/16” wrench to remove both pieces of 1/8” male nut with tubing from the
NPT fittings.