The moisture in the food is very important for the composition of grain grains, and it is also an important role in maintaining the grain's own life activities and maintaining color, flavor, and quality. Properly grasping and controlling grain moisture has extremely important significance for scientific grain conservation. Because of this, in the formulation of national grain and oil standards, there is a strict scientific definition of the formulation of water indexes. Grain moisture is the collective name for water content in grain and oil. In the storage work, grain moisture is divided into safe moisture, semi-safe moisture, and dangerous moisture. According to its structure is divided into free water (free water) and bound water (bound water). Free water exists in grains and capillaries of grain and oil grains. It has the properties of ordinary water and is unstable in grain and oil grains. It increases and decreases with changes in the temperature and humidity of the environment and participates in the physiological and biochemical reactions of grain oil seeds. During the storage of grain and oil, the change in water is mainly the change of free water. The general test of water results in free water. The nature of the combined water is relatively stable. The moisture contained in grain and oil that reaches a safe moisture content is basically a combination of water. At this time, the grain and oilseeds have very weak life activities and are relatively stable in storage. Hand-held quick moisture analyzer is an important instrument for determining the moisture content of grain.

Hand-held quick moisture analyzers, like other inspection instruments, should have the same room environment for inspections. The general unit often only pays attention to the day equal force inspection and non-robustness inspection equipment, and holds that the hand-held quick moisture analyzer is not the technical supervision department that regularly verifies the equipment, and ignores its proper maintenance and proper use. First of all, its technical file should be established to ensure the continuity and accuracy of its use. Second, there should be normal temperature and humidity and cleanliness. In view of the fact that many of them require flexible and rapid speciality in the autumn grain purchase and drying tower inspection, they should try to maintain the temperature and humidity during normal inspection. Excessive temperature and humidity will affect its accuracy, especially in the inspection of drying towers, should leave the workshop sub-room, place a hood to make it moderate temperature and humidity, clean and hygienic.

The use of handheld moisture analyzer requires that the sample temperature, ambient temperature, and instrument temperature be as consistent as possible. First of all, in the autumn grain purchase, due to the north of the acquisition season in grain storage, the temperature difference between indoor and outdoor is usually between 40°C and 50°C. In this way, from the sample extraction to the actual measurement, under the premise of requiring the detection speed, because the instrument adjusts itself, it is difficult to adjust in a short time, and the water result is higher than the standard method by 1.0~2.0. Therefore, we must have a reasonable degree of control. Secondly, in the drying and follow-up inspection, due to the drying and dewatering, a large amount of free water in the corn structure is evaporated and lost through the use of mechanical high temperature, thereby achieving the goal. In this way, the grain temperature at the exit of the tower is relatively high. It is necessary to pick up the inspection samples in the appropriate flow outlets for cooling so that the three temperatures can be basically kept consistent.

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