Thermostar™ With Test Gas Argon - Pfeiffer Vacuum OmniStar GSD 300 O1 Operating Manual

Quit:
•
Close <Tune Ion Source QMA 200>
•
Save the changes by confirming the prompt with <YES>
•
Close <TuneUp>
Close the valve of the calibration unit:
•
In the menu bar choose <Manual>
•
Choose <DI/DO...>
•
Double click Valve to deactivate it
•
Close the window with <OK>
4.4.3 ThermoStar™ with Test Gas Argon
Optimize with the test gas argon if argon is subsequently to be
analyzed. Setting of "Cathode" to 40 V prevents formation of Ar
ions and allows detection of low H
Make sure that argon is connected to the GSD 300 and
that the feeder lines are thoroughly purged.
Start <TuneUp>
In the menu bar choose <Tune>
Choose <Ion Source>
Adjust all parameters as shown in the picture below
Choose <Display/Measure Data > to display the peak
groups of argon
Optimize:
•
Test at which RF Polarity the better peak shapes are
obtained and choose the corresponding polarity.
•
Set Field-Axis in such a way that a useful resolution
and peak shape are obtained.
•
Alternatingly optimize Extraction and Focus to
maximum peak height.
Quit:
•
Close <Tune Ion Source QMA 200>
•
Save the changes by confirming the prompt with <YES>
•
Close <TuneUp>
22 Initial start up
O concentrations on mass 18.
2
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BG 805 071 BE (9904) GSD300.om