How to choose a weighing instrument in a special industry, which aspects must be fully considered
The weighing instrument is generally used for weighing and is an indispensable part of everyone's diet and daily life. The weighing instrument is made of rubber material with a strain gauge, which will cause a certain level of deformation under load, but then it will return to its The original position and the plasticity response to each load. Such very small changes can be obtained by strain gauges. There are many types of weighing gauges that can be integrated into different applications. Common weighing gauges include: a little more weighing Weight instrument, curved beam weighing instrument, water level sensor, endurance weighing instrument, resistance judgment force weighing instrument. How to choose a weighing instrument in some special industries? Before choosing, you must fully consider the actual working environment of the weighing instrument, including factors such as high temperature, high and low temperature tests, high corrosion, and electromagnetic field damage to the signal output. Let's take a closer look! (1) High temperature: High temperature will cause the welding of the weighing instrument to change, the glue will melt, and the internal stress field of the polyurethane material polyurethane elastomer will also change. The high temperature weighing instrument should be used in high temperature geographic environments. (2) Air relative humidity: The relative humidity of the air will cause common failures of the weighing instrument short-circuit failure. Therefore, in this geographical environment, a closed weighing instrument should be selected, and different weighing instruments should use different methods, and There will be a very big difference. (3) Highly corrosive: In a highly corrosive geographic environment (including damp cold and acid), it will cause damage to the polyurethane elastomer of the weighing instrument or common faults of short-circuit failure. For the polyurethane elastomer of the polyurethane material that is seriously corroded, The surface is treated with a paint baking process or a metal surface layer is used to solve the professional treatment in order to carry out the characteristics of corrosion resistance. (4) Electromagnetic field: Electromagnetic field will harm the output signal of the weighing instrument. Therefore, check the shielding characteristics of the weighing instrument as harshly as possible to find out whether it has high-quality professional ability to resist ionizing radiation. The situation seriously damages the weighing instrument, and if the operation process is improper, it will also threaten the safety factor of the workers at work. Therefore, the weighing instrument used in the geographical environment here should be an explosion-proof weighing instrument as much as possible. The selection range of the weighing instrument depends on the large net weight value of the weighing integrated service platform and the identification of other factors, and then to establish the application range of the weighing instrument. The closer the inspection range of the weighing instrument, the more accurate the weighing body. Therefore, when selecting the inspection category of the weighing instrument, factors such as weighing, tare weight, vibration and destructiveness and load should be fully considered to ensure the service life of the weighing instrument and the precision level of the weighing instrument Including rated current load, sensitivity, discrete system, eddy current loss error, accuracy error, stress relaxation, zero output, input, output, ground wire resistance, temperature compensation, polyurethane material polyurethane elastomer raw materials and other performance parameters, the accuracy is the application scale Necessary conditions for heavy instrumentation.
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