148 Agilent 1260 Infinity DAD and MWD User Manual
8
Test Functions
Intensity Test
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 156). 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 49 on page 149 shows a typical intensity test spectrum.
Test Evaluation
The Agilent Lab Advisor, ChemStation and Instant Pilot evaluate four spectral
ranges automatically, and display the limits for each range, the measured
intensity counts, and passed or failed for each spectral range (see Figure 49
on page 149).
The test is 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.
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