Sensitivity refers to the ability of an electronic balance to reflect small changes in weight or mass. It also refers to the ability of an electronic balance to detect the amount of change in the mass of an object placed on a weighing pan. It is usually expressed in terms of sensitivity, which is the specific magnitude of the sensitivity of the balance. After the balance of the electronic balance is balanced, the distance the pointer moves on the label is called sensitivity. The sensitivity of the left and right discs of the balance at no load and full load refers to the ratio of the linear displacement or angular displacement of the tip of the balance pointer to the displacement mass produced. The sensitivity of the electronic balance is independent of the mass of the substance referred to in the two plates. The balance indexing sensitivity is the number of divisions of the electronic balance sign caused by the unit mass. The greater the distance the balance pointer moves (that is, the more the offset number is offset), the higher the sensitivity, the more sensitive the balance. The index value is the quality value that causes the unit index, so the smaller the mass value, the better the sensitivity of the balance.

The failure phenomenon, influencing factors and adjustment methods of the electronic balance's sensitivity failing to meet the technical specifications are:

(1) The center of gravity is too high or too low. It can be solved by adjusting the position of the center of gravity ball by lowering or raising it.

(2) The knife and the knife are broken or worn seriously. The knife and knife can be replaced.

(3) The ambient humidity is too large. The balance chamber should be dry, bright, and the temperature fluctuations are not large, to prevent water vapor and corrosive gases from entering the room, and the window is preferably opened to the north. In order to avoid uneven heat and cold between the two arms of the balance, the heat source should be separated by appropriate methods around the balance. It should be kept at an appropriate distance from heat sources such as heating, electric furnace, oven, lighting, etc., and electric fans with high power, such as exhaust fans and air conditioners. The single arm of the balance is affected by cold and hot air.

(4) Technical problems in installation of various components. The correct installation and use of the balance has a direct relationship between the measurement performance of the balance and the service life. The measurement performance is reduced, and the weighing error will occur, which will affect the measurement result. Therefore, the balance should be placed on a stable, firm, and off-wall cement platform. If the surrounding environment is vibrating and cannot be eliminated, the weather should be placed on a table with anti-vibration protection function to reduce the balance and protect the blade. .

(5) Inconsistent air and full load sensitivity Fault: 1 Offline: Full load sensitivity is lower than no load. The three-blade can be removed by raising the edge cutter. 2 eating line: full load sensitivity is higher than no load. The three-blade can be removed by flattening the edge cutter.

(6) The sensitivity of the left and right discs is inconsistent. Fault: The friction between the two sides of the blade and the cutter bearing is inconsistent. The position of the middle knife and the knife holder can be adjusted. If the wear is serious, the middle knife should be replaced. 2 If the length, hardness and sharpness of the two sides of the knife are inconsistent, the two sides of the knife should also be replaced.

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