The detector provides a multi-channel mode that offers additional operation functions for method development and peak-purity analyses. In multi-channel mode, data can be recorded on more than one channel simultaneously with different, selectable wavelengths. The detector quickly switches between the selected wavelengths. The maximum number of channels depends on your detector variant.
A single analysis is sufficient to measure several channels. Sample components with different absorption characteristics can be analyzed even without complete chromatographic resolution.
Consider the following, when operating the detector in multi-wavelength mode:
Each additional channel reduces the maximum possible data collection rate, and leads to an increased baseline noise.
Switching the optical grating permanently between the wavelengths can lead to wear on the mechanical parts of the detector in the long term. The multi-channel operation mode is therefore only recommended for method development and peak-purity analysis, but not for continuous routine operation.
As an alternative, you can switch the wavelengths as often as required in a single data channel in the Chromeleon software.
For further information on wavelength switching and single-wavelength operation, see Single-Channel Mode, and the Chromeleon Help.
TIP
The optical filters for eliminating higher-order wavelengths are moved automatically into the light path. This applies for multi-channel mode, too.