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Using fiber optic spectrometer should pay attention to what are the things

by:FOT     2020-06-29
What should pay attention to things by using fiber optic spectrometer photoelectric conversion device will spectrometer into photocurrent. So called spectral intensity, make the current direct measurements is called the direct method, spectrometer can measure instantaneous value in the industry, if we charge the current to the capacitor device, after a period of time, the measurement of capacitor voltage size is the so-called integral method and the signal is the average charging time. The following share should pay attention to use refrigeration type fiber optic spectrometer things? What are those? 1, pay attention to the need to amplify the signals produced by photomultiplier tubes, therefore, important to note is that the photoelectric conversion device of photocurrent is linear related to the intensity of light, The optical current and the light intensity of the photomultiplier tube produce relationship under the effect of light may not be linear) And the relationship between the optical current and capacitor voltage are known. Direct reading spectrometer of photomultiplier tubes produced by signal is very weak, so we must enlarge, direct reading spectrometer is used to measure the amplified signal, but in any case, each amplifier is obtained by the change of the change of the small signal to control the large signal, quantitative is likely to push measurement instruments and equipment work. In refrigeration equipment type fiber optic spectrometer, we mainly use the equipment room weak low frequency power amplification equipment, why call low frequency? Actually refers to the audio frequency range referred to in the operating frequency. 2, pay attention to its analysis method based on the principle of spectrum method, the basic principle of the photoelectric direct reading spectrometry and its analysis method is established based on the basic principle of spectrum method and its experimental technology, only measurement parameters and data processing method is different. Atoms in the excitation light source plasma concentration determines the direct reading spectrometer emission spectral line intensity. Refrigeration type fiber optic spectrometer analysis methods rely on light electricity multiplier to the intensity of the light signal into electrical signal. More equipment using photoelectric multiplier output optical flow to the integral capacitor charging device, the measurement of refrigeration type fiber optic equipment spectrometer device integration capacitor voltage said line method. Can supply good quality spectrometer and high sensitivity of the hollow cathode lamp and multielement lamp, the service life of hollow cathode lamp itself is certain. Graphite tube is important in the graphite furnace atomic absorption analysis the consumption of materials. Other systems such as flame atomizer, capillary tube injection and flame atomic absorption analysis the main consumables. Therefore, the basic requirement of refrigeration type fiber optic spectrometer, integral capacitor voltage of the device. Has a linear relation with the intensity of the light signal.
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