UV spectrophotometer maintenance, maintenance and precautions

UV spectrophotometer maintenance and maintenance:

1. After the instrument has been used for a certain period of time, a certain amount of dust will accumulate inside. It is best to start the dust removal work by the maintenance engineer or the engineer under the guidance of the engineer. At the same time, re-fasten the radiator of each heating element to the optics. The sealing window of the box is cleaned, the optical path is calibrated if necessary, the mechanical part is cleaned and necessary lubrication, and finally, the original state is restored, and then necessary detection, adjustment and recording are performed.
2, the dust and corrosive gases in the environment can also affect the flexibility of the mechanical system, reduce the reliability of various limit switches, buttons, photoelectric couplers, and also cause one of the reasons why the aluminum film corrosion of the components must be learned. Therefore, it is necessary Regular cleaning to ensure environmental and instrument indoor sanitary conditions, dustproof
3, temperature and humidity are important factors affecting the performance of the instrument. They can cause corrosion of mechanical parts, reduce the smoothness of the metal mirror surface, causing the error or performance degradation of the mechanical part of the instrument; causing optical components such as gratings, mirrors, focusing mirrors, etc. Aluminum film corrosion
Insufficient light energy, stray light, noise, etc., even the instrument stops working, thus affecting the life of the instrument. It should be regularly corrected during maintenance. It should have an instrument room with four seasons and constant humidity, and be equipped with constant temperature equipment, especially in the southern region. laboratory.

Ultraviolet spectrophotometer notes:
1. When using the cuvette, be careful not to stain or wear the translucent surface of the cuvette. The rough surface of the cuvette should be held.
2. The liquid to be tested should be measured as soon as possible after preparation to avoid decomposition of colored substances and affect the measurement results.
3. The measured absorbance A is preferably controlled between 0.2 and 0.8. When it exceeds 1.0, it should be properly diluted.
4. The action should be gentle when switching the sample chamber cover.
5. Do not pour the test sample on top of the instrument to prevent the sample from contaminating the surface of the instrument and damaging the instrument.
6. Before the sample is filled, the cuvette is rinsed twice with the sample containing the sample. After the measurement, the cuvette is cleaned with distilled water and then inverted and dried. If there is a color hanging in the cuvette, it can be washed with absolute ethanol.
7. When loading the sample into the cuvette, if the sample flows to the outer wall of the cuvette, it should be dried with filter paper, and the lens paper should be cleaned after cleaning. Do not wipe with filter paper to avoid scratching the cuvette.
8. When measuring the ultraviolet wavelength, a quartz cuvette is required.
9. Do not open the window of the measurement room during the measurement process, otherwise the accuracy of the measurement results will be affected.

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