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Maintenance
Troubleshooting Methods
Users should consult this section if a problem develops or an instrument function fails to
perform as expected. The procedure outlined below is a step-by-step approach to trouble-
shooting the Series 200 UV/VIS LC Detector. Unlike the performance tests, which concen-
trate on the detector's output, these tests concern themselves with specific internal detector
functions. It is possible but highly unlikely that a multiple failure may occur; this section
directs the user to the single most likely cause of a problem and its correction. A general
instrument trouble shooting guide is also included in order to provide rapid assistance if a
particular problem is known.
Functional Test
Perform the following steps when the instrument is not working.
1. Check the AC line cord connector on the rear panel to be sure that the Series 200 UV/VIS
LC Detector is set for the correct voltage.
2. Turn on the power. You should see the Power Up screen and the lamp should light.
If nothing happens, disconnect the instrument from the power line and check the line
fuse (located in the power connector) for continuity. If the internal element is open,
replace the fuse.
Drift and Noise Problems
Several factors may contribute to drift and noise. These factors are due to absorption
changes or differences in the sample or reference paths. Check the following when baseline
problems have been confirmed:
Optical Components
Refer to the Routine Maintenance section for maintenance instructions on photodetector and
monochromator windows.
Cell Condition
Visually check the sample cell. If the flowcell, windows or connecting fittings appear to be
defective or dirty, see Routine Maintenance for instructions on flowcell disassembly and
cleaning.
7 - 18
If the fuse blows after being replaced, do not
proceed further. The cause of the blown fuse
must be determined to prevent further damage.
DO NOT replace with a value of anything other
than that specified for the line voltage used.
Troubleshooting Methods
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Table of Contents
Troubleshooting
