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Question:

What is the range of use of a pressure gauge? Why is it at its measuring range of 1/3-2/3?

What is the range of use of a pressure gauge? Why is it at its measuring range of 1/3-2/3?

Answer:

Pressure gauges are common range instruments, the statutory use of membrane pressure gauges should be used. (2) when the pressure of the pressure is stable, the normal operating pressure shall be at 1/3 2/3, 2 of the upper limit of the measuring range of the instrument
1, it is the characteristic of elastic element, at 1/3-2/3, the linear and accuracy of elastic element is best;2. To ensure that the maximum pressure is less than the overload pressure in the range of 2/3, for the sake of safety and instrument life;
In fact, the scope of the pressure gauge should be close to the full range of 1/3~ range, the measured pressure is too small, the signal amplitude is small, the sensor zero error and repeatability error and hysteresis error etc. for output in the proportion is large, the precision is low, the pressure is too large (in excess of the normal range of the pressure sensor) although the sensor does not damage (pressure overload pressure sensor in general can withstand 30%), but this time the linearity will be decreased obviously, also affect the measurement accuracy.I have been engaged in pressure measurement and measurement work in the metering research department for many years, and I am familiar with the pressure sensors.

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