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2.4.13 UV monitors
Introduction
This section describes the design and function of UV monitors U9-M and U9-L.
The modules include a monitor unit and a detector with a UV flow cell.
Function of UV monitor U9-M
UV monitor U9-M measures the UV absorbance at a wavelength range of 190 to 700 nm.
A flip-mode enables measuring of UV/Vis absorbance at three wavelengths simultaneously during a
run. The second and third wavelength can be turned off or on in method phase properties, by manual
instructions or in system settings.
Installation of UV monitor U9-M should only be performed by GE Service personnel.
Note:
The resolution is decreased when more than one wavelength is used simultaneously due to
lower sampling frequency per wavelength. Do not use more wavelengths than necessary.
Note:
Location and illustration of UV monitor U9-M
The illustration below shows the location of UV monitor U9-M, together with a detailed view of the
monitor unit and detector. The monitor unit is labelled U9-M and the detector U9-D.
When UV monitor U9-M is used, the entire Multi-module panel shown in the illustration is re-
placed by U9-M.
Note:
1 2
3 4
Description Part
Inlet 1
UV flow cell. Three different path lengths are available:
0.5 mm, 2 mm (default) and 10 mm 2
UV detector 3
Outlet 4
70 ÄKTA pure User Manual 29119969 AB
2 The ÄKTA pure instrument
2.4 Instrument modules
2.4.13 UV monitors