Process Engineering Division – Instrumentation and Automation Section – Daily Topics – Topic No. 2020-12-12
Thread Content
Process Engineering Division – Instrumentation and Automation Section – Daily Topics – Topic No. 2020-12-12: Discussion question: 324. A pressure gauge with a grade of 1.5 and a scale range of 0–100 KPa was calibrated. It was found that the error at 50 KPa was the largest, at 1.4 KPa; the errors at other scale points were all less than 1.4 KPa. Is this pressure gauge considered qualified? (5 points are given only to those who provide the correct answer; additional points are awarded for a correct calculation process or detailed explanation.)
The maximum allowable error for this gauge is 100*1.5% = 1.5 KPa; since the measured errors are all below this value, the gauge is still qualified.
The maximum reference error of this table = ×100% = 1.4% < 1.5%. So, this pressure gauge is qualified
The maximum allowable error of this pressure gauge is ±1.5 kPa; the largest error occurs at 50 kPa, where it is 1.4 kPa, which is less than 1.5 kPa. Therefore, this gauge is qualified.
The error tolerance for a 1.5-grade pressure gauge is ±1.5%. The maximum reading value of this gauge is 100 KPa; therefore, the maximum allowable error should be less than 100 * 1.5% = ±1.5 KPa, in which case the gauge is considered qualified. The greatest error for this gauge at a pressure of 50 KPa is 1.4 KPa, which is less than the standard value of 1.5 KPa, so the gauge is qualified
The maximum allowable error for this gauge is 100*1.5% = 1.5 KPa; since the measured errors are all below this value, the gauge is still qualified.
The maximum allowable error for this gauge is 100*1.5% = 1.5 KPa; since the measured errors are all below this value, the gauge is still qualified.
Qualified; an error tolerance of 1.5% is allowed, and a value of 1.4 kPa, which is lower than 1.5 Pa, falls within the acceptable range