
88 1100 Series DAD and MWD Reference Manual
3 Troubleshooting and Test Functions
Intensity Test
The intensity test measures the intensity of the deuterium and tungsten lamps
over the full wavelength range (190 – 950 nm). Four spectral ranges are used
to evaluate the intensity spectrum. The test is used to determine the
performance of the lamps and optics (see also “Cell Test” on page 90). When
the test is started, the 1-nm slit is moved into the light path automatically, and
the gain is set to zero. To eliminate effects due to absorbing solvents, the test
should be done with water in the flow cell. The shape of the intensity spectrum
is primarily dependent on the lamp, grating, and diode array characteristics.
Therefore, intensity spectra will differ slightly between instruments. Figure 23
shows a typical intensity test spectrum.
NOTE
The test ist for the standard flow cells (10 mm and 6 mm pathlength) only. The nano-flow
cells (80 nl and 500 nl) cannot be run with this test due to its low volume.
Figure 23 Intensity Test
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