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I don't know what you mean by using this for too long? Whether the moisture meter has been aged for too long, or whether it has been heated for too long when measuring moisture. If the heating time is too long, it is caused by improper use of the moisture meter.
This value is stable when the corn water evaporates. If you continue to heat it, it will destroy the molecular structure of the corn itself, and the water in it will also evaporate, so it is not allowed. Therefore, this time has to be mastered by yourself from the actual operation at work.
If your moisture meter has an automatic function, then you just need to set it automatic, don't set the time, when the moisture value of the moisture meter does not change in one minute, the instrument will automatically stop and will not appear in the situation you said.
If the machine is aging, think about repairing or replacing it.
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The biggest difference between halogen bulbs and other incandescent lamps is that the glass shell of the halogen lamp is filled with some halogen element gases (usually iodine or bromine), and through the reversible chemical reaction of these halogens in the lamp, the life of the incandescent lamp is greatly extended, and its brightness and heat are increased several times, in short, The so-called halogen lamp is just a heating lamp (bubble) with several parts higher efficiency than ordinary incandescent lamp; The heat transfer of the lamp is originally transmitted through radiation, and the basic luminous principle of the tungsten halogen lamp is the same as the incandescent lamp we use at home, which is a thermal radiation light source. But this kind of radiation and irradiation of the sun is not much different, and you said radioactivity is two different things, the so-called radioactivity refers to the decay of the atomic nuclei of some substances, emitting rays that we can't see or feel with the naked eye, many substances in the world atoms themselves are slowly decaying, so it can be said that there is radioactivity, but we usually say radioactivity refers to the large dose of radiation that will have a destructive effect on other substances, in this sense, halogen lamps are not radioactive.
The gravimetric method calculates the amount of water evaporated from a sample by weight change after evaporation. First, it is impossible for 100% of the water in any sample to be evaporated.
Second: in addition to water, the evaporated substances in the liquid sample may also have other organic solvents and volatile substances; Third, the moisture content of the ppm level is very low, and in order to ensure a certain representativeness, it is necessary to add a large amount of sample, and the more sample volume, the less complete evaporation is. Fourth, the measurement accuracy of the moisture analyzer of the heating loss on gravity method is also related to the load cell, and the weight change that can be measured by your one-thousandth or one-thousandth of a ten-thousandth balance sensor is different.
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The first thing to do is to determine the kind of moisture analyzer you are using. If it's convenient, I'll give a model! Help you out.
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Precautions for halogen moisture analyzers:1. Dust-free, dry, no vibration;
2. There is no flowing wind blowing;
3. There is no magnetic field around;
4. The table is stable;
5. Clean environment.
How to use halogen moisture analyzer:1. Put the instrument on the flat test bench;
2. Then gently lift the heating cylinder and install the accessories;
3. Connect the power supply to turn on, the temperature resolution, and the instrument starts to self-test;
4. Calibrate the instrument, and see the manual for calibration methods;
5. Take the sample and place it evenly on the weighing plate;
6. Close the heating cylinder, then press the "test" button, the heating lamp will be on, and the instrument will test;
7. In the process of measuring moisture, the temperature window displays the temperature;
9. If you connect to a printer, you can directly press the "Print" button to print out the moisture value.
Halogen moisture meter can be used in various production and experimental processes: such as medicine, plastics, chemicals, food, grain, feed, seeds, rapeseeds, etc.
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The rapid moisture analyzer can easily test a wide range of solid liquid powders with moisture content! Smart testing, easy! Direct reading of moisture content with one click!
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Halogen moisture analyzer is accurate and simple to operate, widely used in medicine, grain, feed, seeds, rapeseed, dehydrated vegetables, tobacco, chemical, tea, food, meat, textile, agriculture and forestry, papermaking, rubber, plastics, textile materials, wood powder, papermaking and other industries in the laboratory and production process. The abbreviated operation method of the halogen moisture analyzer is as follows:
1. Insert the power plug of the halogen moisture analyzer into the power socket.
2. Place the halogen moisture meter horizontally and adjust the front casters until the bubbles in the level are adjusted to the inside of the base circle.
3. Press the switch button to turn on the power, and the main screen of the halogen moisture meter will display the number.
4. After the ratio and balance components are revealed, put the appropriate sample in the sample tray. (Spread the sample as evenly and horizontally as possible on the sample tray).
5. Close the heating cover, press the "start" button after the ratio and component appear stable, and the moisture tester will start to heat. When the buzzer beeps an alarm, it means that the measurement is complete. The display screen shows the time used for measurement, the moisture content of the sample, the initial weight of the sample, and the amount after drying.
6. After the halogen moisture meter is tested, press the "reset" button to prepare for the next experiment.
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Good operating methods and a safe environment are the key factors to ensure the proper operation of the halogen moisture analyzer
1. When using this instrument in the laboratory, it is recommended to wear laboratory work clothes, goggles, and dustproof gloves. Proper eye protection is provided to prevent hazards when handling chemicals or hazardous substances.
2. It is not allowed to use this instrument in hazardous environments containing steam, fog, dust and combustible dust.
3. The operating table should be stable.
4. The electricity environment should be safe.
5. Maintain and wipe regularly.
Post**ah,SK two (forgive me,I won't hit that),As long as you're willing to stick it for a week,**It will be like a shelled egg.,Just**It's too expensive.,You can also try Herborist**.,The effect is also very good.,It's just a little slow.。
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I greatly recommend this. Good. ,ABC Tianpi speaking is good,The key is the teacher's guidance,These are my personal experiences and feelings,If you think it's also suitable for you, you can try it.。 >>>More
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Now as long as there is money, it is only a matter of time before it is upgraded. You can get to level 40 for about 60 yuan in 7 days. Now it's useless to pull to raid.