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How to select the precision of the general pressure gauge?

2020-11-26

JVTIA

193

The accuracy of general pressure gauge there are generally two kinds of methods. （ 1) Habits or experience method in general pressure gauge the progress of the tubing and casing outside diameter size grade, outside diameter size of 40 mm and 60 mm instrumentation generally to 2. Level 5, the size of the outer diameter is 100 mm and 150 mm instrumentation generally to 1. Level 6. As the general pressure gauge is working with more tables, the instrument accuracy is not high, so if you choose the meter diameter is basically determines the precision of the instrument. （ 2) Calculation method according to the instrument to measure the allowed maximum absolute error to calculate the precision of the instrument should choose level, can use the following formula to calculate: the precision of the instrument level = ( Allow the absolute error value/measurement limit) 200 q X 100% 'pressure gauge'

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