Agilent Technologies 1100 Series Manual de servicio Pagina 91

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1100 Series DAD and MWD Reference Manual 91
Troubleshooting and Test Functions 3
Dark-Current Test
The dark-current test measures the leakage current from each diode. The test
is used to check for leaking diodes which may cause non-linearity at specific
wavelengths. During the test, the slit assembly moves to the dark position,
cutting off all light falling onto the diode array. Next, the leakage current from
each diode is measured, and displayed graphically (see Figure 26). The leakage
current (represented in counts) for each diode should fall within the limits
(red bands) shown in the plot (see Figure 26).
Dark-Current Test Evaluation
Figure 26 Dark-Current Test
Figure 27 Dark-Current Test Results
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