The integration of several common errors when the choose and buy of orifice flowmeter release date: 2019 - 04 - 15 read number: zero

1, the abnormal data processing problem any system can present problems, can show some abnormal unreasonable data. So in order to protect the interests on both sides of the deal, abnormal data problems may occur when the design data should be fully considered prudent modifiability, once appear, and participate in order to avoid abnormal data accumulated calculation, causing confusion in the measurement data. To render the abnormal data problem in the design should fully consider the data of prudent modifiability, and prevent the abnormal data once present and participate in the cumulative calculation, measurement data of the disorder. 2, the throttle device error ( 1) Orifice flowmeter in straight pipe before fluid is relatively clean, flowing through the throttle device ideal ( More than 10 times the pipe diameter) , fluid in the turbulent state ( Reynolds number greater than 4000) , its accuracy can reach 0. The class of 75. But as a result of straight pipe temperament, measuring not up to par, orifice produce error factors are: orifice population acute injury; Liquid and solid waste accumulation on the surface orifice, the orifice plate surface roughness change, greatly increase the measurement error. On the basis of the orifice plate made of used on the spot measurement, orifice flow meter in started putting-in-service proactively as accuracy can reach 1%, after 3 months after operation, the measurement accuracy only reach 3% or even lower. ( 2) Range than the problem. Span ratio ( 3:1) Is the drawback of the orifice meter big. Although there are wide range than the transmitter, but in planning a big about 11:32 flow change, when the flow rate less than 30% of the heavy traffic, because the saving type measurement method, measuring precision will decline substantially. So, in order to progress range than, can consider to use the characteristics of wide range in the transmitter, the method that USES software to complete range of active adjustment ( Soft protection) , and then extended range than, progress measurement useful planning, guaranteeing the accuracy of the measurement. 3, use of interface and processes data problem due to the succession of gas transport, the uncertainty of dynamic, elusive and can't reproduce the features, and studies the data in real time to useful data constitute the whole process of monitoring and preservation, is conducive to the analysis and manipulation of data abnormal, is the important part of data management. 4, field transducer pressure transmitter itself can reach the accuracy of the mistake is to complete the warp and woof of accuracy of the measurement system. So, to guaranteeing differential pressure transmitter, temperature sensors, pressure sensors itself accuracy for A grade, instant verification, guaranteeing the accuracy.