Voyager DP-263-S Guía de usuario Pagina 304

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Chapter 5 Optimizing Instrument Settings
5-74 PerSeptive Biosystems
5
If the resolution does not improve, decrease the Grid
Voltage% (by 0.5 percent for Linear mode, or 1.0 percent
for Reflector mode), acquire a new spectrum and observe.
4. Continue increasing (or decreasing) the Grid Voltage% in
increments (or decrements) of 0.5 percent (Linear mode)
or 1.0 percent (Reflector mode) until optimum resolution is
obtained.
Hint: If you obtain close to acceptable resolution at one
setting, but less acceptable resolution at the next
setting, you may have adjusted the Grid Voltage% too
far. Increase or decrease in small increments until you
obtain optimum resolution.
5. Adjust the Guide Wire Voltage as needed:
Increase the setting to increase sensitivity for
higher masses.
For Voyager-DE, Voyager-DE PRO, and
Voyager-DE STR models in Reflector mode, adjust
the Guide Wire between 0 and 0.04 percent.
6. If you are analyzing peptides below 2,000 Da, you may be
able to improve resolution by adjusting the Accelerating
Voltage:
Linear mode—Decrease from 20,000 V to
15,000 V to increase flight times.
Reflector mode—Decrease to 15,000 V,
10,000 V, or 5,000 V. However, these lower
settings will compromise sensitivity.
7. Save the .BIC file.
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