INFICON HAPSITE Smart Plus Chemical Identification System - Manual (Page 257)

7 - 15
IP
N 07
4-
47
2-
P1
C
HAPSITE Smart Plus Operating Manual
The Emission button turns the filament ON or OFF, the EM button turns the
Electron Multiplier ON or OFF. Green signifies ON and is the default condition when
the Tune window is opened.
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
0.8 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. (300 - 400 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