HP 5973, Hardware Manual

Page: 101 / 297

4 Maintaining the MSD
101
Maintaining the vacuum system
The vacuum system requires some periodic maintenance
As listed earlier in Table 4, some maintenance tasks for the vacuum system
must be performed periodically. These include:
• Checking the foreline pump fluid (every week)
• Checking the calibration vial (every 6 months)
• Replacing the foreline pump oil (every 6 months; every 3 months for CI
MSDs using ammonia reagent gas)
• Checking the diffusion pump fluid (once a year)
Failure to perform these tasks as scheduled can result in decreased instru-
ment performance. It can also result in damage to your instrument.
Other procedures should be performed as needed
Tasks such as replacing a foreline vacuum gauge or triode gauge tube should
be performed only when needed. See Chapter 3,
Troubleshooting the MSD ,
on page 65 and see the online help in the MSD ChemStation software for
symptoms that indicate this type of maintenance is required.
More information is available
If you need more information about the locations or functions of vacuum
system components, refer to Chapter 5,
Vacuum System , on page 183.
Most of the procedures in this chapter are illustrated with video clips in the
HP 5973 MSD Reference Collection CD-ROM.