Veeco MS40 Operation And Maintenance Manual page 99

Replacing the Internal Leak Standard
The internal leak standard, installed in the MS-40 at the factory, should be
returned annually to VIC for re-certification (contact the Customer Service
department for information). Removal or replacement of the standard must be
performed with the unit powered down and the unit vented (as stated in
Section 4.6).
The procedure for replacing the internal leak standard is:
Vacuum Instrument Corp.
2099 Ninth Avenue
Ronkonkoma, NY 11779
631.737.0900
1109-186-00 Rev. C
14. Lightly tighten the nuts removed in Step 6 so that the filament
assembly is secured to the source housing.
NOTE
Do not over-tighten the nuts. Over tightening will cause
the ceramic block to crack.
15. Bend the filament contacts so that they touch the stud posts of the
source. Make sure that the nuts holding the contacts are tight.
16. Remove the O-ring from bottom of the source assembly. Clean
with a dry cloth. Refer to Section 4.7 for information on how to
remove, clean and install O-rings.
17. Apply a thin coating of vacuum grease and re-insert the O-ring back
into the O-ring slot.
18. Reattach the source assembly with the two screws removed in Step
4.
19. Reattach the heat sink that covers the source assembly with the
screws removed in Step 3.
20. Reattach the source electrical connector to the source assembly.
1. Turn off the MS-40.
2. Open the rear panel by turning the captive screw at the top of the
panel 1/4 turn counterclockwise and gently lowering the door.
3. Disconnect the temperature sensor electrical connector.
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