Agilent 1200 Infinity Series DAD User Manual 63
Using the Module
4
Setting up the Detector with Agilent ChemStation
Other Advanced Method Parameter Settings
This screen (part of the Advanced Method Settings)
shows the default settings.
Analog Output The Range can be set to either 100 mV or 1 V full scale,
see “Control Settings” on page 56.
Zero Offset 1 to 99 % in steps of 1 % (5 % equal to 50 mV).
Attenuation 0.98 to 2000 mAU at discrete values for either 100 mV or
1 V full scale.
Margin for Negative Absorbance Use this field to modify the detector’s signal handling to
increase the margin for negative absorbance. Use this
option if, for example, your solvent gradient produces a
decreasing baseline absorbance, and for GPC analyses.
Limits: 100 to 4000 mAU.
The higher the value the greater the baseline noise. Set
this value only if you expect negative absorbance greater
than -100 mAU.
Slit (G4212A)
The 1260 Infinity DAD (G4212B) has a fixed slit width of
4nm.
You can select the optical bandwidth (1, 2, 4 or 8 nm) of
the detector; the narrower the slit, the smaller the optical
bandwidth of the instrument, but the lower its sensitivity.
The smaller the optical bandwidth the higher the spectral
resolution.
Autobalance Defines, whether a balance is performed prior to a run
and/or after a run has finished.
Lamp on required for analysis If unchecked, the lamp will be turned off after the analysis
has finished.
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