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Transpector MPH Operating Manual
EM Voltage . . . . . . . . . . . . . . . . The voltage of the EM (if equipped). The
minimum voltage for the EM is 600 V. The
maximum voltage for the EM is 2000 V. The
default voltage for the EM is 800 V. Changing
this value will impact the gain of the Electron
Multiplier. This is useful only when trying to
resolve a peak from the noise floor. EM
voltage should be changed only by
experienced operators.
ROD POLARITY . . . . . . . . . . . . Defines the polarity of the Quadrupole rods.
In the factory, Rod Polarity is determined for
each individual Transpector MPH to produce
optimum tune quality. Do not alter this setting
unless directed by INFICON.
SENSOR TYPE . . . . . . . . . . . . . Defines whether the sensor is equipped with
an EM/FC combination or an FC only
detector. Do not alter this setting unless
directed by INFICON.
EMISSION CURRENT . . . . . . . . The Emission Current affects the current at
the filament in the ion source. This has been
optimized in the factory for each individual
Transpector MPH to produce optimum tune
quality. Do not alter this setting unless
directed by INFICON.
FOCUS Voltage . . . . . . . . . . . . . Changes the voltage of the focus plates
which generate an ion beam from the ion
source. This has been optimized in the
factory for each individual Transpector MPH
to produce optimum tune quality. Do not alter
this setting unless directed by INFICON.
FILAMENT NUMBER. . . . . . . . . Transpector MPH has dual filaments. This
allows for switching from one filament to the
other.
11 MARKERS button and displayed marker—MARKERS turns on and off the
markers. The marker consists of two components: a vertical one that
represents the highest intensity of the displayed peak and a horizontal one that
indicates 0.9 AMU width at 10% peak height.
12 CAL GAS button—CAL GAS will open the calibration gas if installed
(Only used on HPR systems).
13 SUBMIT button—SUBMIT submits the changes made to Transpector MPH
tune into the Transpector MPH Non-Volatile RAM (NVRAM) in the
Transpector MPH electronics box. SUBMIT must be clicked to save the
changes made on the Tune window.
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