ISQ User Guide - Write Frame of Mind

7 Optimizing Your Method
Modifying an Automatic Tune
• Start—Use this field to enter the starting voltage for the tune. The start voltage must
always be less than the stop voltage. For example, -35 is smaller than 0.
• Stop—Use this field to enter the final voltage for the tune.
• Step—Use this field to enter the increment for the tuning range. For example, if you
tune from 0-50 in increments of 10 V, then you would set the Step field to 10.
• Max Width—Use this field to enter the maximum allowable width of the ion during
the tune.
• Measure at %—Use this pull-down menu to select the location on the peak at which
you want to measure the maximum width.
– 10—Select this option to measure the width at 10% of the peak height.
– 50—Select this option to measure the width at 50% of the peak height.
• Threshold—Use this field to enter the change in intensity that has to occur when the
tune to select a new voltage. For example, if you set this field to 1.1, the tune will not
select a new voltage for that component, unless the intensity is 110% of the old
intensity. If you set this field to 1, anytime the new voltage has an intensity larger
than the old intensity, the tune will select the new intensity.
• On Error—Use this pull-down menu to select how to handle an error in the tune.
– Fail—Select this option to stop the tune when an error occurs.
– Continue—Select this option to allow the tune to continue on to the next device
when an error occurs.
9. Click the Resolution tab to configure the resolution of your tune. You can tune the
resolution during a lens tune or you can tune the resolution by itself.
84 ISQ User Guide Thermo Scientific