INFICON HAPSITE ER Chemical Identification System - Manual (Page 241)

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HAPSITE ER Operating Manual
7.5.3.1 Tune Parameters
EM Volt. . . . . . . . . . . . . . . . . . . . . . . Used to increase or decrease the gain of the
system. EM voltage should be set to a value
that achieves a Base Peak Gain of between
0.5 and 2.0.
Emission Current . . . . . . . . . . . . . . Used to optimize the ionization efficiency of
the ionizer. Emission Current is set to
achieve maximum intensity for mass 117.
Range is 100 - 1000. (350 is typical.)
Extractor Volt . . . . . . . . . . . . . . . . . Used to optimize the ionization efficiency of
the ionizer. Extractor Volt is set to achieve
maximum intensity for mass 117. Range is
0 - 100.
Focus Volt . . . . . . . . . . . . . . . . . . . . Used to optimize the ionization efficiency of
the ionizer. Focus Volt is set to achieve
maximum intensity for mass 117. Range is
-12 to +12.
Threshold . . . . . . . . . . . . . . . . . . . . One standard deviation of the Baseline.
Threshold determines if a measured point is
used in the peak area integration. If the point
is used, the baseline is subtracted before
use.
Baseline. . . . . . . . . . . . . . . . . . . . . . The mean value of the measured noise level.
Reverse Rod Polarity . . . . . . . . . . . Changes the Rod polarity on the Mass filter
and is selected for optimum performance at
mass 117.
TP. . . . . . . . . . . . . . . . . . . . . . . . . . . The total MS pressure.
Running Tune Base Peak Gain . . . Current measured Base Peak Gain (BPG).
NOTE: The Base Peak Gain will switch to
Red when BPG is outside the target
range.
Auto Resolve . . . . . . . . . . . . . . . . . Adjusts the resolution of all Mass Peaks to
the target resolution.
Save Tune . . . . . . . . . . . . . . . . . . . . Save the Tune File
Mass Cal.. . . . . . . . . . . . . . . . . . . . . Checks and corrects the ten calibration
masses for correct location within the mass
range.
Full Scan . . . . . . . . . . . . . . . . . . . . . Switches between Full Scan display mode
and Peak Scan display mode