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Interpreting UV-Vis Spectrophotometer Troubleshooting Methods

Author:QINSUN Released in:2023-05 Click:23

1. The UV-Vis spectrophotometer is noisy
The light source bulb has been used for more than its life
Processing method:
Replace the light source bulb
2. During use, the digital display can not be reset, and at the same time the basic position of the graphic record is too high
① Photomultiplier and other aging, performance degradation
② The signal processing board may occur Fault
③The pre-amplified version is faulty, resulting in increased feedback
Processing method:
①Turn on the power supply, record the fault curve first, then compare with the standard curve of the original record to find out the similarities and differences, and make a qualitative analysis. Then replace the photoelectric tube of the machine with a new photomultiplier tube of the same modele and of the same specifications, then start the test. The result is that there is no change in the recorded graph, which proves that the photomultiplier tube has not been damaged and deteriorated.
②Further inspection of the signal processing board, no damage was found to the components of the signal processing board, and the sensitivity-related potentiometer was detected, and the measured data was normal, indicating that the signal processing board was not faulty.
3. During the self-test of the UV-Vis spectrophotometer, a wavelength self-test error is displayed.
The sample chamber cover of the instrument may have been opened during the self-test

Processing method:
Close the instrument sample chamber lid and perform the self-test again
4. When the instrument self-tests, it reports a communication error
The data cable between the instrument and the computer is not properly connected
Resolution method:
Connect the data cable, restart the instrument and the software, then retest
5 . During the test, it indicates that the energy is too low
①The sour lightThis bulb has been used for more than its lifetime Period
② There is something wrong Opaque in sample cell that blocks light Treatment method: Replace UV-Vis spectrophotometer light source bulb; remove light blocking element