Waters GCT Premier Operator's Manual page 292

TDC Settings dialog box parameters: (Continued)
Parameter
Drift (PPM/°C)
Data pane
Veff
Centroiding Parameters pane
Centroid
Threshold
Min Points
Np Multiplier
Resolution
B-14 The MassLynx Tune window
Description
Set the size of the correction to be applied to mass
measurements to compensate for the effect of temper-
ature drift.
Setting the DXC drift value on page
See also:
Sets the instrument nominal mass scale. Default
value is 5300 V.
See also: Setting up nominal mass on page
Note: Veff is determined using the Instrument Setup
wizard.
Instrument Setup Wizard Nominal
See also:
Mass: on page 3-11.
The intensity threshold for peak detection, usually set
to 1.
Sets the minimum peak width for peak detection. The
range is usually within the range 2 to 6. Increase the
value if peak splitting is observed in centroid
acquisitions.
The default value of 0.7 usually gives optimum mass
measurement on intense peaks.
Setting the Np multiplier on page
See also:
Np is customarily determined using the Instru-
Note:
ment Setup wizard.
See also: Instrument Setup Wizard DDTC Setup: on
page 3-13.
For optimum dead time correction, set to the actual
resolution of the instrument. A precision ±500 is
adequate.
The resolution is customarily determined using
Note:
the Instrument Setup wizard.
See also: Instrument Setup Wizard DDTC Setup: on
page 3-13.
5-16.
B-47.
B-50.