Teledyne ACCQPrep HP125, Инструкция по установке и эксплуатации

Страница: 81 / 142

ACCQPrep HP125
Section 5 PeakTrak
5-17
· Monitor – Clicking on this option prevents fraction-
ation based on the mass spectrometer signal.
· Terminate On Target – stops the run after all mass
spectrometer detection ions have been detected.
· Detection Ions – used to set ions for detection or to be
monitored. Up to four single ions may be chosen, or a
range of ions and up to three single ions may be
selected.
On PurIon S and PurIon L systems, detected ions
may be a mixture of positive and negative ions.
· Ion Settings – set ionization parameters to enhance
detection of molecular ion peaks.
• External Detector — Enable this option to use a 0 to 1
volt analog signal from an external detector. When
enabled, click the D
ETAILS
button to configure additional
settings. These settings include the slope-based and
peak width options described in
λ
1
and
λ
2
above. The
system will use its internal algorithms to cut detect and
cut peaks based on the analog input signal. Refer to the
External Detector instruction sheet for cable and
plumbing requirements.
The external detector option is not available on
ACCQ
Prep systems with ELSD or PurIon detectors.
• ELS Detector — Enable this option to use the evapo-
rative light scattering (ELS) detector on an ACCQ Prep
system. When enabled, click the D
ETAILS
button to
configure additional settings:
· Sensitivity- Can be selected as N
ORMAL
to keep
larges peaks on scale or H
IGH
to detect small peaks.
The default setting is H
IGH
to ensure most
compounds are detected.
· Signal Gain – You may modify the gain to scale the
detector signal.
· Slope Based and Threshold – Refer to these features
described in
λ
1
and
λ
2
above.
· Spray Chamber Temperature – The default settings
are 30 °C (normal phase default methods) and 20 °C
(reverse phase). This setting may be adjusted from 10
to 60 °C so that detection can be optimized for the
solvent system in use. However, operation at temper-
atures greater than 5 °C below the ambient temper-
ature is not guaranteed. Lower temperatures cause
more of the solvent to condense before entering the
drift tube. This is useful to limit the amount of
solvent aerosol entering the drift tube allowing the
drift tube temperature to be set lower.
· Drift Tube Temperature – The default settings are 60
°C (normal phase default methods) and 60 °C
(reverse phase). This setting may be adjusted from 30