How to judge the accuracy grade of high accuracy pressure gauge
The specific method for judging the accuracy level of high accuracy pressure gauge is as follows:
The accuracy grade of the high accuracy pressure gauge is expressed as a percentage of the allowable error to the pressure gauge range. It is generally divided into seven grades: 0.5, 1, 1.6, 2, 2.5, 3, 4 (the boiler does not use grades 3 and 4) ), the smaller the value, the higher the accuracy.
For example, for a pressure gauge with a precision of 2.5 MPa with a dial range of 0~2.5 MPa, the allowable error between the pressure value indicated by its pointer and the actual pressure value of the measured medium shall not exceed the upper 2.5MPa ×2.5%=±0.0625 MPa; When the pressure gauge indicates the pressure is 0.8MPa, the actual air pressure is between 0.7375 and 0.8625MPa.
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