Dual-Wavelength mode

In Dual-Wavelength mode, the detector can monitor two wavelengths, one on channel A and one on channel B.

Because the sampling frequency is reduced to 1 or 2 Hz, use of Dual-Wavelength mode is limited to more standard chromatography where peak widths span at least 20 seconds to enable full characterization of a peak.

In this mode, the following conditions apply:

• If both selected wavelengths are greater than 370 nm, the detector applies the second-order filter to block unwanted UV light.
• If both selected wavelengths are less than or equal to 370 nm, the detector removes the second-order filter.
• If the selected wavelengths bracket the 370-nm threshold, the detector does not apply the second-order filter and issues an alarm message that any data collected for the wavelength above 370 nm can contain inaccuracies because of possible UV light interference (UV effects).