1, the accuracy grade of the pressure gauge is to reflect the accuracy of the indicator value close to the real value in comparison with the precision table. It is the percentage of the ratio of the absolute value of the maximum basic error to the upper limit of the measurement, which is determined by the size of the error generated in the calibration.
3, China 2005 new digital pressure gauge verification regulations announced and implemented, in line with JJG875-2005 digital pressure gauge verification regulations. Set pressure accuracy + / - 0.01% respectively, plus or minus 0.02%, plus or minus 0.05%, plus or minus 0.1%, plus or minus 0.2%, plus or minus 0.5%, plus or minus 1.0%, plus or minus 1.6%.
4. The method of reasonable selection of accuracy grade of pressure gauge should be based on the requirements of production technology, economic and practical, detection method, etc., and the allowable error required by the minimum value of measured pressure should be used to select the accuracy grade.
