2000 MS Hardware Maintenance
98
Mass Spectrometer Maintenance
10. Inspect the exhaust seal.
Replace if it is worn or damaged (27-402536-00).
11. Wipe the exhaust seal clean with a lint free cloth, and refit to the exhaust port.
12. Lower the elbow onto the diffusion pump exhaust port.
CAUTION
Take care not to dislodge the seal.
13. Reinstall the exhaust clamp by pushing it onto the joined exhaust flanges.
14. Rotate the clamp 180° and install the screw from the left side.
15. Thread the wing nut onto the screw.
16. Rotate the clamp as far to the left as possible, while still allowing room to turn the
wing nut.
17. Rotate the diffusion pump so the elbow lies as close to the manifold as possible.
18. Tighten the wing nut on the exhaust clamp.
19. Rotate the inlet clamp as far inboard as possible.
20. Tighten the wing nut on the inlet clamp.
21. Refit the left side cover and fasten in place with the four screws and two spacers.
If the elbow or inlet clamp interfere with the side cover, reposition and refit the
side cover.
22. Bring the MS alongside the GC and refit the transfer line.
23. Reconnect the manifold and trap heater cables.
24. Refit the top cover.
25. Carefully slide the MS up to the GC.
26. Close the vent valve by lowering the vent valve lever.
27. Turn on the MS.
