General Maintenance 4
5977B Series MSD Troubleshooting and Maintenance Manual 105
To Move or Store the MSD when Connected to a 7890 GC
Materials needed
• Ferrule, blank (5181-3308)
• Interface column nut (05988-20066)
• Wrench, open-end, 1/4-inch × 5/16-inch (8710-0510)
Procedure
1 Move the MSD away from the GC. (See “To Separate the MSD from the
7890 GC” on page 97.)
2 Tighten the vent valve.
3 Install the interface nut with the blank ferrule.
4 Open the analyzer cover.
5 Finger-tighten the side plate thumbscrews. (See Figure 8 on page 106.)
6 Plug the MSD power cord in.
7 Switch the MSD on for 5 minutes to establish a rough vacuum.
8 Switch the MSD off.
9 Close the analyzer cover.
10 Disconnect the LAN, remote, and power cables.
Do not overtighten the side plate thumbscrews. Overtightening will strip the threads in
the analyzer chamber. It will also warp the side plate and cause leaks.
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