Jenway 6715 - Manual (Page 88)

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SeCtion 7 - Multi-Wavelength Mode
7.1 PrinCiPleS oF MeASUreMent
The multi-wavelength mode is used to measure absorbance or transmittance at up to four distinct
wavelengths. There are two ways in which this mode can then be used, one sample at four
wavelengths or four samples each at a different wavelength when the eight position cell holder is
fitted. This mode is used for specific tests when one sample is examined and a ratio of absorbance
values (or difference between absorbance values) at different wavelengths can reveal the purity or
the composition of the sample. The ratio or difference calculations are automatically made by the
spectrophotometer. The measurements are made almost simultaneously so the sample must be stable.
Easily constructed methods for DNA or RNA purity/concentration can be implemented, with options
for automatic or manual calibration and measurement.
Select the Multi-Wavelength Mode from the Main Menu options.
7.2 Free oPerAtion
Settings
If the user is not logged in then the main measurement screen will automatically be displayed when
the
Multi-Wavelength mode is selected from the Main Menu: