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Zooming in to the nitrogen peak
4.
In the Control 1 tab, enter 7950 (that is, the maximum value minus 50)
for accelerating V. Do not use the slider.
Rationale
•
If you double-click in the peak display to center the peak in the
display, the software tries to center the peak using the accelerating
voltage. To give the software tolerance for adjustment, the current
value of Accelerating V must be less than the maximum value,
hence 7950 is entered.
•
Typing a value in the text box, and using the slider, control the
magnet in different ways.
See
"Specifying the Accelerating V value" on page
5.
Double-click on the peak, to center it in the display.
6.
Use the Tune Parameters pane Span (ppm) slider to zoom in to the
nitrogen peak so that it occupies the center half of the display.
D-42.
Low resolution tuning
2-7
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Table of Contents
Troubleshooting
