Seismic diaphragm pressure gauge which external factors affect the measurement accuracy
Seismic diaphragm pressure gauge is the equipment used to realize pressure measurement in production and life. The most important thing in use is the accuracy of pressure gauge indication. The pressure gauge indicates whether it is accurate and whether there is any error. In addition to some factors of the instrument itself, external factors will also have an impact on the indication result. Here we briefly summarize several aspects:
1, affected by temperature
The pressure measurement of the shockproof diaphragm pressure gauge mainly depends on its internal spring tube and other elastic elements. In a high or low temperature environment, the elastic element will be deformed under the effect of temperature, especially in long-term work in high temperature medium. The pressure gauge, the elastic element may be permanently deformed, it will also cause the pressure gauge display error.
In the use of shock-proof diaphragm pressure gauges, it is necessary to minimize the influence of temperature on the indication value. The most direct and effective method is to avoid the pressure gauge working under abnormal temperature conditions. If it is impossible to avoid it, the pressure gauge should be protected from high temperature or cold. For example, a condensing device or a thermal insulation device is installed on the pressure gauge.
2. Influenced by overload
The overload operation of the shock-resistant diaphragm pressure gauge does not mean that the indicated value of the pressure gauge reaches the maximum value of the dial, but actually exceeds the full-scale 2/3 position. The elastic element of the pressure gauge is already in the near limit state. pressure gauges work long-term under overload conditions, and their internal elastic elements such as spring tubes and diaphragms will be elastically weakened or even elastically lost for a long period of time at the limit or near-limit deformation state, and eventually undergo permanent deformation.
3, affected by vibration
Seismic diaphragm pressure gauges also appear to be inaccurate under vibration conditions. Severe vibrations can directly cause deformation of the pressure gauge's elastic components, affecting the sensitivity and accuracy of the pressure gauges, and reading the gauge values indicated by the user. . The measure against vibration of the pressure gauge is mainly to install the buffer device and the damping device.