Views:2 Author:Site Editor Publish Time: 2021-08-26 Origin:Site
Multiple flowmeters the instantenous flow of multiple flowmeters on site is negative; Although the pipe is not empty ,the dispalys of the transmitter display is zero.
Upon receiving feedback from the customer, the technical team of ARTang learn situation immediately to examine and analyze the faults:
1. There is no display on the electromagnetic flowmeter display, the installation position of the electromagnetic flowmeter is closer to the printing equipment, the printing equipment drains a lot of steam during the operation and the surrounding environment is damp. There is water fog on the surface of the instrument shell. In addition, the front and rear covers of the electromagnetic flowmeter are not tight and the circuit board is damaged by moisture due to inadequate protection.
2. There is negative flow in electromagnetic flowmeter. After on-site investigation, the length of straight pipe section of electromagnetic flowmeter does not meet the installation requirements (front is 5D, rear is 3D)
1.Replace the circuit board of the electromagnetic flowmeter, coating the shell to seal and tightening and covers ;
2.Replace the installation position of the electromagnetic flowmeter so that it meets the installation requirements of front and rear straight pipe section
Customer phone feedback after one month, electromagnetic flowmeter is still functioning properly
Why should electromagnetic flow meter guarantee long enough straight pipe segment when installed?
The formula for measuring the flow according to the electromagnetic flowmeter is known: Q = A *V
A - Pipeline cross-sectional area ;V - Measured medium flow rate
When the direct pipe segment is not sufficient, that is, when the measured medium flows through the damper (elbow, valve), the flow rate distribution will distort and produce a whirlpool. At this time, the flow rate is different and changing at any time in any section of the pipe interior. The measured media flow rate cannot be calculated by mathematical formula at this time.Therefore,when we install the electromagnetic flow meter , sufficient the direct pipe segment is to stabilize the flow and make the output of the transmitter stable.