How to choose a weighing instrument in a special industry, what aspects need to be considered
The weighing instrument is generally used for weighing and is an indispensable part of everyone's daily life. The weighing instrument is made of vulcanized rubber containing a strain gauge. It can produce a certain level of deformation under load, but then it will return to its original position. , And cause a ductile response to each load. This very small change can be obtained based on strain gauges. There are many types of weighing instruments to be integrated into different applications. Common weighing instruments include: spot shot weighing instrument, Bending beam weighing instrument, liquid level sensor, supporting force weighing instrument, resistor strain force weighing instrument. How to choose a weighing instrument in some special industries? Before selecting, consider the specific office environment of the weighing instrument, including factors such as high temperature, high temperature, high erosion, and the harm of magnetic field to the data signal output. Let's take a detailed look below! (1) High temperature: High temperature will cause the spot welding of the weighing instrument to change, the glue will melt, and the internal ground stress of the polyurethane elastomer will also change. The high temperature weighing instrument should be used in the high temperature natural environment. (2) Ambient humidity: Ambient humidity will cause short-circuit failure of the weighing instrument. Therefore, in this natural environment, a sealed weighing instrument should be selected. Different weighing instruments use different methods, and they will be very large. The difference. (3) Aspect ratio erosion: In the natural environment of aspect ratio erosion (including moisture and acid in the body), the polyurethane elastomer of the weighing instrument will be destroyed or short-circuit failure, for the more severely eroded polyurethane elasticity In order to complete the anti-corrosion characteristics, the sandblasting process or the application of metal surface treatment technology can be carried out to solve the surface layer. (4) Magnetic field: The magnetic field will affect the output data signal of the weighing instrument. Therefore, it is necessary to strictly check the shielding characteristics of the weighing instrument to check whether it has excellent anti-electromagnetic wave radiation working ability, and the site of flammable materials, It will seriously damage the weighing instrument, and if the actual operation is not good, it will also threaten the safety of the workers. Therefore, the weighing instrument used in the natural environment here must be an explosion-proof weighing instrument. The selection scope of the weighing instrument lies in the evaluation of the larger net weight value of the weighing service platform and other elements, and then the application scope of the weighing instrument is clarified. The closer the detection range of the weighing instrument, the greater the precision of the weighing body. Therefore, when selecting the detection range of the weighing instrument, factors such as weighing, tare weight, vibration and impact and its load should be considered to ensure the life of the weighing instrument. The accuracy level of the weighing instrument includes Rated load, sensitivity, discrete system, reasons for deviations in eddy current loss, reasons for deviations in repeatability, stress relaxation, zero output, key-in, output, grounding resistance, temperature compensation, polyurethane elastomer raw materials and other performance indicators, precision Degree is a prerequisite for the application of the weighing instrument.
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