3-1
3 Tuning the Instrument
This chapter describes how to prepare and tune the instrument (that is,
adjust the instrument’s parameters to achieve maximum performance).
Note:
• Tuning is not the same as instrument calibration, which ensures
that the peaks displayed in a spectrum are in their correct locations.
• The figures in this chapter shows indicative parameter values only.
See also: Chapter 4 for details of how to acquire data, Chapter 5 for
details of how to calibrate the instrument, and Appendix B for full
details of the Tune window.
Contents:
Topic Page
Preparing the instrument for operation 3-2
Obtaining an ion beam 3-3
Setting up the instrument automatically 3-8
Tuning the instrument for EI 3-19
Tuning the instrument for best resolution in EI 3-24
Tuning the instrument for positive CI 3-25
Tuning the instrument for negative CI 3-30
Preparing for FI operation 3-33
Managing tune parameters 3-34
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