You can define the characteristics of up to five signals (A to E) for the G1365A/B MWD, or up to eight signals (A to H) for the G1365C/D and G7165A. The signal definitions also optionally include reference signals. You can define the center wavelengths and bandwidths of the sample and reference wavelengths for each signal. Mark the Acquire check box for each signal you wish to store.
The wavelength at which the absorbance of the sample is measured as a function of time. The absorbance at the reference wavelength is subtracted from the absorbance at the sample wavelength.
Limits: 191 to 949 nm
The precision with which you can set the Wavelength depends on the CDS application.
The bandwidth of the sample wavelength. The bandwidth determines the wavelength range over which the absorbance is measured. For example, a sample wavelength of 254 nm with a sample bandwidth of 20 nm measures absorbance from 244 to 264 nm.
Limits: 2 to 400 nm (depending on the sample wavelength)
The precision with which you can set the Bandwidth depends on the CDS application.
The wavelength at which a reference absorbance is measured as a function of time. Mark the check box to switch on the reference wavelength. The reference wavelength compensates for fluctuations caused by changes in baseline absorbance, for example due to changes in solvent composition during gradient elution.
Limits: 191 to 949 nm or Off (no reference)
The precision with which you can set the Reference Wavelength depends on the CDS application.
The bandwidth of the reference wavelength.
Limits: 2 to 400 nm, but dependent on the reference wavelength. Mark the check box to switch on the reference bandwidth. For reference wavelengths less than 390 nm or greater than 750 nm, the bandwidth is restricted to twice the difference between the reference wavelength limit and the reference wavelength value.
The precision with which you can set the Reference Bandwidth depends on the CDS application.