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What do you need to consider when choosing a test and measurement instrument? How to use a radiation test instrument?
2024-10-12
In this article, the small series will introduce the factors that need to be considered in the selection of test and measurement instruments, andradiation test instrumentThe method of use when testing is introduced. If you are interested in the content of this article, you may wish to continue reading.
1. according to the measurement requirements of the selected test measuring instrument
2. Sensitivity: the smallest change in the measured signal that can be detected;
2. Trigger: timing control and switch control;
3. Display; easy to set up and use;
4. Anti-interference degree: normal noise suppression ratio and its analog suppression ratio;
5. Power requirements; system integration issues;
6. Calculation and analysis of the data collected;
7.I/O number: analog and digital;
8. Accuracy: the degree of consistency between the measured value and the first-level standard;
9. Measurement speed: maximum sampling rate;
20. Signal conditioning; isolation;
The need for network/bus protocols, such as Ethernet and IEEE-488(GPIB);
22. Resolution: the smallest part of the observed signal;
23. Data storage requirements; the number of channels to be measured;
24. Size, weight and portability;
25. Bandwidth: the highest frequency signal component of the sampled signal;
26. System cost and cost per channel.
According to the above factors to be considered, we can gradually determine the instrument we should choose in the test measurement.
Method of using 2. radiation test instrument
Radiation testing is based on the physical properties of radioactive rays, the use of specialized instruments, such as radiometers, radiometers, etc., by measuring the intensity of radioactive elements or emanation concentration to obtain a geophysical method of radioactive intensity. Detection methods include: ground survey, aerial survey, radiation sampling, logging, gas measurement, track measurement and physical analysis.
Radiation detector is used to measure high-energy, low-energy X, gamma ray instrument. R-PD-type intelligent х-gamma radiation instrument uses highly sensitive scintillation crystal as a detector, fast response, used to monitor a variety of radioactive workplace x, gamma rays, radiation dose rate of special instruments. So, how to use the radiation test instrument?
2. Turn on the switch of the tester, adjust the frequency modulation of the instrument to low frequency, intermediate frequency or high frequency according to the radiation source to be tested, and the screen of the instrument will display (0000) (if not, please check whether the battery of the instrument is installed). Find the radiation source, hold the back end of the instrument with your hand as much as possible, and aim the front end of the instrument at the radiation source. The instrument will make beep, beep, beep, beep, beep, beep, beep, beep, at this time, the corresponding radiation value of the radiation source will appear on the screen (if there is no sound or the value may have problems with the test instrument), and the value is constantly beating and changing.
2, take a piece of ordinary clothing block inInstruments and radiation sourcesIn the middle, the instrument will still ring and the value is still beating, proving that ordinary clothes cannot block the radiation source.
3. If we block our professional radiation protection clothing between the instrument and the radiation source, the instrument will stop sounding. The value displayed on the frequency screen of the instrument is (0000), which proves that the radiation protection clothing effectively isolates the radiation.
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