Teledyne 6200T - Sulfides Analyzer - Manual (Page 231)

6200T Total Sulfur Analyzer Maintenance
Teledyen Analytical Instruments 231
Gas Line fitting
Spring
Sintered Filter
O-Ring
Critical Flow Orifice
O-Ring
Vacuum Manifold
Figure 11-2: Critical Flow Orifice Assembly
5. Take out the components of the assembly: a spring, a sintered filter, two O-rings
and the critical flow orifice.
6. You may need to use a scribe or pressure from the vacuum port to get the parts
out
of the manifold.
7. Discard the two O-rings and the sintered filter.
8. Replace the critical flow orifice.
9. Let the part dry.
10. Re-assemble the parts as shown in Figure 11-2 using a new filter and o-rings.
11. Reinstall the NPT fitting and connect all tubing.
12. Power up the analyzer and allow it to warm up for 60 minutes.
13. Perform a leak check (refer to Section 11.3.6).
11.3.5. Checking for Light Leaks
When re-assembled after maintenance, repair or improper operation, the 6200T can
develop small leaks around the PMT, allowing stray light from the analyzer
surroundings into the PMT housing. To find light leaks, follow the below procedures:
CAUTION
This procedure must be carried out by qualified personnel, as it must be
performed while the analyzer is powered up and running and its cover
removed.