Agilent Technologies 5975 Operation Manual page 82

3
Operating in Electron Impact (EI) Mode
Results will indicate the recommended amount to adjust AMU offset for
high-mass. If your results are within 5 units of the targeted amount, there is no
need to make adjustments.
Adjustments
1
2
3
4
5
6
7
8
9
82
Verify ATUNE.U has been loaded.
In Instrument Control view select Edit Tune Parameters from the Instrument
menu to display the Manual Tune dialog.
Click the Dynamic tab and then click the Amu Offset sub-tab.
Select the Enable This Lens checkbox.
Enter the recommend dynamic offset Voltage (V) and click OK.
Click Save to save this dynamic Amu Offset for the high-mass.
You can overwrite the existing ATUNE.U to include high-mass adjustment
or save this file to a new name, for example, ATUNEHIGH.U.
Anytime an ATUNE.U is performed, it will overwrite this dynamic Amu
Offset that was entered. This is why you might want to rename the tune.
Click Done to close the Manual Tune dialog.
Load the PFHT.M, then load the saved tune file, and then save the method.
Rerun test mixture (repeat high-mass checkout). If the correction is within
5 units, no further adjustments are required.
5975 Series MSD Operation Manual for MassHunter