Interpreting the UV-Vis Spectrophotometer Troubleshooting Method

1. The UV-Vis spectrophotometer is noisy
Reason:
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
Reason:
① Photomultiplier and other aging, Performance degradation
② The signal processing board may occur Fault
③The preamplified version has a fault, which causes an increase in the amount of feedback
Processing method:
①Turn on the power, record the fault curve first, then compare it with the standard curve of the original record to find out the similarities and differences, and perform qualitative analysis. Then replace the photoelectric tube of the machine with a new photomultiplic tubeator of the same model and specifications, then start the test. The result is that there is no change in the recorded graph, proving that the photomultiplier tube has not aged or 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.
Reason:
The sample chamber cover of the instrument may have been opened during the self-test
Processing method:
/> Close the sample chamber lid of the instrument and perform the self-test again
4. When the instrument self-tests, it reports an error ofcommunication
Reason:
The data cable between the instrument and the computer is not properly connected
Method of resolution:
Connect the data cable, restart the instrument and software, then repeat the test
5 . During the test, it indicates that the energy is too low
Reason:
①The light source bulb has been used for more than its life Period
② There is something something opaque in the sample cell that blocks the light Treatment method: Replace the light source bulb of the UV-Vis Spectrophotometer; remove light blocking element

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