Teledyne T200 User Manual page 129

To clean or replace a critical flow orifice:
1. Turn off power to the instrument and vacuum pump.
2. Remove the analyzer cover and locate the reaction cell assembly (refer to
Figure 2-3 and Figure 5-11).
3. Unscrew the 1/8" sample and ozone air tubes from the reaction cell.
For orifices on the reaction cell:
4. Unscrew the orifice holder with a 9/16" wrench.
•
For orifices in the vacuum manifold: the assembly is similar to the one shown in Figure
5-12, except:
• Without the orifice holder, P/N 04090, and bottom O-ring, P/N OR34 and;
• With an NPT fitting in place of the FT 10 fitting.
5. After taking off the connecting tube, unscrew the NPT fitting.
6. Take out the components of the assembly:
•
•
•
•
Note
7. Discard the two O-rings and the sintered filter and install new ones.
8. Reassemble the parts as shown in Figure 5-12.
9. Reinstall the critical flow orifice assembly into the reaction cell manifold or the
vacuum manifold.
10. Reconnect all tubing, power up the analyzer and pump. After a warm-up period
of 30 minutes, carry out a leak test as described in Section 5.6.11.
083730200A DCN7962
This part holds all components of the critical flow assembly as shown in
Figure 5-12.
spring
sintered filter
two O-rings
the orifice
For the vacuum manifold only, you may need to use a scribe
or pressure from the vacuum port to get the parts out of the
manifold.
Teledyne API T200 NO/NO /NO Analyzer with NumaView™ Software
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