Installation manual

104 5975 Series MSD Operation Manual
4 Operating in Chemical Ionization (CI) Mode
To set up the software for CI operation
Procedure
1 Switch to the Tune and Vacuum Control view.
2 Select Load Tune Values from the File menu.
3 Select the tune file PCICH4.U.
4 If CI autotune has never been run for this tune file, the software will
prompt you through a series of dialog boxes. Accept the default values
unless you have a very good reason for changing anything.
The tune values have a dramatic effect on MSD performance. Always start
with the default values when first setting up for CI, and then make
adjustments for your specific application. See Table 16 for default values
for the Tune Control Limits box.
NOTE
These limits are used by Autotune only. They should not be confused with the parameters
set in Edit MS Parameters or with those appearing on the tune report.