The sensitivity of an electronic balance is the ability of an electronic balance to sense the amount of change in the mass of an object placed on the weighing pan. It is usually expressed in terms of sensitivity, which is the characteristic of an electronic balance that reflects small changes in weight or mass. Sensitivity is the specific magnitude of the sensitivity of an electronic 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 electronic balance at no load and full load refers to the ratio of the linear displacement or angular displacement of the tip of the electronic balance to the displacement mass. The sensitivity of the electronic balance is independent of the mass of the substance referred to in the two plates. The electronic balance indexing sensitivity is the number of divisions of the electronic balance sign caused by the unit mass. The greater the distance moved by the electronic balance pointer (that is, the more the offset number of the offset), the higher the sensitivity, and the more sensitive the electronic balance. The index value is the quality value that the unit scale has. Therefore, the smaller the mass value, the better the sensitivity of the electronic balance.
The sensitivity of the electronic balance does not reach the technical indicators, the influencing factors, and the repair method is to prevent water vapor and corrosive gases from entering the room.
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 knife are broken or worn seriously. The knife and knife can be replaced.
3. The ambient humidity is too large. The electronic balance room should be dry, bright, and the temperature is not shaken. The window is preferably opened in the north. In order to prevent the electronic balance from being unevenly heated and cold, the heat source should be separated by an appropriate method around the electronic balance. It should be kept at an appropriate distance from the heat source such as heating, electric furnace, oven, lighting, etc., and the exhaust fan, air conditioner and other electrical equipment with large power. In order to prevent the electronic arm from being affected by cold and hot air flow.
4. Technical problems of each component device. The correct installation and use of the electronic balance is directly related to the measurement performance and service life of the electronic balance. The measurement performance is reduced, and the weighing error will occur. The measurement electronic balance should be placed on the cement platform which is stable, firm and off the wall. Therefore, If the surrounding environment is vibrating and cannot be eliminated, the electronic day should be placed on the table with anti-vibration protection function to reduce the change of the electronic balance and protect the blade.
5, full load sensitivity is inconsistent Fault: A, offline: full load sensitivity is lower than no load. The three-blade can be removed by raising the edge cutter. B, eating line: full load sensitivity is higher than no load. The three-blade can be removed by flattening the edge cutter.
The sensitivity of the left and right discs is inconsistent. Faults: A. The friction between the two sides of the middle blade and the knife holder 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. B. 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.