PerkinElmer TORION T-9, User Manual

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Mass Spectrometer . 215
Most of the settings on this tab are locked. The lock is meant as a reminder that this section
contains advanced settings that should only be changed by advance users. Please read the entire
chapter to gain an understanding of the functionality of the instrument before attempting to make
any changes to the mass spectrometer parameters. The password to unlock the features on all tabs
is provided in the description for the Unlock Mass Spec Parameters earlier in this section.
The only settings that normally need to be adjusted are available at the top of the MS Parameters
tab in the white background without needing to unlock all the parameters.
•
Detector - The detector in the Torion T-9 instrument is an electron multiplier. The detector
will degrade over time. To maintain the performance of the instrument it is necessary to
change the voltage on the detector. For inexperienced users it is suggested that the changes
be made using the Performance Validation run on the instrument. Normal operating range is
-1200 to -2200. Incorrectly adjusting values will result in poor performance of the
instrument.
• IonTarget - The mass spectrometer uses software to control the number of ions in the
trap. This sets the target value for the number of ions and is not an indication of the actual
number of ions but is a unit less value that represents the number of ions. Typically this
value is set to 5000.
•
BaselineValue/Value - It is important to have the baseline set correctly. An incorrect
baseline setting can result in poor performance of the control algorithm. The baseline does
not usually change during normal operation but installation of a new trap assemble that
includes the electronics package can affect the baseline. The baseline is set in two locations.
o The first baseline setting found in the MassSpectrometer Group, IonSource
Subgroup, and BaselineValue Parameter in the Setpoint field is set just above the
noise level. It is used for the control algorithm and needs to remove almost all of
the noise.
o
The second baseline setting found in the Control Group, Baseline Subgroup, Value
Parameter in the Setpoint field sets the true baseline.
•
Filament Current
- The filament is used to create electrons. The electrons are used to
ionize the analytes. The filament degrades over time. To maintain the performance of the
instrument it is necessary to change the current on the filament.
NOTE: Changing parameters on the Mass Spectrometer without proper training may cause damage to
the instrument and may result in costly repairs. Only adjust these settings if there is a complete