Check out our video  视频 on how a pressure gauge works or visit our videos page for additional tutorials on pressure and temperature instruments.

he accuracy specified by ASME under B40.1 standards fall under 8 different “grades” to help describe a pressure instrument’s true level of ability to read accurately.  Below are the different grades and their corresponding accuracies. 重试  错误原因

Grade 4A = 0.1% full scale 重试  错误原因

Grade 3A = 0.25% full scale 重试  错误原因

Grade 2A = 0.5% full scale 重试  错误原因

Grade 1A = 1.0% full scale 重试  错误原因

Grade A = 2-1-2% – 2% accuracy on first 1/4 of the scale, 1% on the middle 1/2, and 2% on the last 1/4 of the scale 重试  错误原因

Grade B = 3-2-3% – 3% accuracy on first 1/4 of the scale, 2% on the middle 1/2, and 3% on the last 1/4 of the scale 重试  错误原因

Grade C = 4-3-4% – 4% accuracy on first 1/4 of the scale, 3% on the middle 1/2, and 4% on the last 1/4 of the scale 重试  错误原因

Grade D = 5% full scale 重试  错误原因

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