144 5977B Series MSD Troubleshooting and Maintenance Manual
4 General Maintenance
8 Repeat steps 4 through 7 for m/z 650.
9 Exit the Set Optimize Quadrupole Frequency program.
10 Select MS OFF from the Execute menu.
11 Close the analyzer cover.
12 Tune the MSD.
Figure 22 Adjusting the quad frequency
RF cover
Quad frequency
adjustment screws
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