Teledyne ACCQPrep HP125 Installation And Operation Manual page 87

mass range even when the range is set within than the
minimum and maximum values allowed for the
spectrometer. Values can range from 50 to 1200 Da
(PurIon and PurIon S) or 2000 Da (PurIon L). Changing
the mass range defined by these controls may cause the
Y-axis (ion count) scaling to change based on the tallest
peak within the range.
• Fluid Interface Pressure - The carrier solvent pressure
is displayed in a ribbon gauge. If the pressure
approaches the level of the red line, the system is
clogged and should be cleaned to allow proper operation.
• Ion Settings- Allows selection of different ion settings to
maximize the intensity of the desired molecular ion. The
factory selections include "Robust" for compounds that
do not easily ionize. "Typical" works well for most
compounds. The "Fragile" setting is used for those
compounds that are delicate or easily fragment.
User-defined settings may also be loaded.
• Make Changes- Pressing this button allows a user to
change the settings to improve the intensity of an ion.
• Save- save changes to an existing ion settings file.
• Save As- save changes and create a new ion settings file.
This new file can be selected in ionization settings or
method development. Additionally, this file can also be
selected when setting up a separation run.
• Factory Settings- restore the "typical", "Robust", and
Fragile" ion settings to the factory default values.
• Probe - The probe nebulizes and ionizes the sample.
There is a choice of ESI (electrospray interface) or APCI
(atmospheric pressure chemical ionization) probes. The
software will change the labels on the control to reflect
the probe installed in the mass spectrometer.
• Gas Temp-the temperature of the nebulization gas for
the probe. Lower temperatures are used for more
delicate, heat labile compounds. The temperature is set
to quickly evaporate the carrier solvent (note that
PurIon S and PurIon L systems will display a single
temperature for both positive and negative ionization).
• Voltage (Current) - This displays a voltage setting (ESI
probes) or current value (APCI probes). Lower values
are used for more delicate compounds.
The capillary is heated to complete the evaporation of
solvent. It also carries a voltage; lower voltages are used
for more delicate compounds.
• Source Voltage - The source voltage settings have the
greatest effect on fragmentation. Higher values induce
more fragmentation but also reduce adduct formation.
ACCQPrep HP125
Section 5 PeakTrak
5-23