1. The factors that stimulate the system to affect the sample excitation results can be summarized into four:
(1) Excitation energy
Different ways of providing energy such as DC arc and spark are different. The excitation pulse width, pulse height and pulse frequency in the spark are different for different elements. Therefore, in different types of instruments, it is necessary to Measure the actual condition of the sample and carefully select the excitation energy parameters.
(2) Stimulate the environment
Generally, it can be divided into two aspects: laboratory humidity environment and argon atmosphere. The argon gas path design of different types of instruments may be different, but the purity of argon itself and whether the gas path leaks should be the inspection and maintenance of the excited environment. Focus.
(3) Sample
The material, sampling, pretreatment and other aspects of the sample have a great impact on the excitation effect. When using and maintaining, it is necessary to pay special attention to whether the state of our excited object meets the requirements. 
(4) Exciting the internal conditions of the station
The internal structure of the excitation table of different types of instruments is different, but in general, whether the interior of the excitation table is clean, the electrode pole distance is stable, and the height of the excitation arc flame relative to the optical system affects our data results.
In short, for different models and instruments from different manufacturers, the implementation of these four factors may be slightly different, but the overall direction of maintenance and repair of the excitation system is here.
2, optical system
(1) Stable optical path structure
The mechanical deformation is small and the correction is in place and can be controlled by constant temperature and slit scanning.
(2) In the optical path, the loss of the ultraviolet and vacuum ultraviolet region spectral lines in the optical chamber is small, and can be maintained by gas circulation or vacuuming. Then, the maintenance of devices such as vacuum pumps has become an important point. In addition, regular wiping of the light-transmitting lenses has become an important operation for ensuring stable transmission of optical signals. For different types of instruments, the stability of the optical system and the efficiency of optical signal transmission are important factors. Therefore, the maintenance and inspection of the instrument should be carried out according to the actual conditions of each instrument.
3 measuring system
(1) The acquisition device maintains a stable and proper working state
The acquisition device is a photoelectric conversion component. The current photoelectric direct reading spectrometer mainly uses two types of collectors, one is a photomultiplier tube, and the other is a CCD/CID detector, a solid imaging system, and any kind of acquisition device. There are functions related to the three aspects of illumination intensity, working power supply and output electrical signal strength. For different light intensities, different power supplies, the photoelectric conversion efficiency of the collector, and its sensitivity and stability will be very Great impact. Therefore, if you need to adjust these parameters yourself, you need to carefully consult the instrument manufacturer's opinion or adjust it in strict accordance with the instrument manual.
(2) The circuit board and chip for signal conversion cannot be wet for a long time, and most of the boards and chips encounter electric leakage or excessive humidity, which will cause leakage. A dark current is generated in the measurement system. When the dark current is large enough, the device in the measurement system circuit may be damaged. Therefore, it is necessary to protect the measuring system of the instrument. Some types of instrument measurement systems are placed inside the spectroscopic room and are generally not considered. However, if there is a vacuum pump oil sucking, etc., you need to contact the instrument manufacturer's technical support immediately.
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