Seeking help with the installation and interference issues of Emerson 8800 vortex flow meters
Thread Content
Dear marine experts and colleagues in the instrumentation field, if you have any questions or need assistance, please demonstrate the humanitarian spirit of helping those in need – help me! 1. Installation issue: regarding the requirements for the straight sections before and after, should the elbows be located close to or far from the meter? There are illustrations. 2. After installation, the DCS kept showing high values; after reading the meter at 475, 50HZ power frequency interference was detected. I was wondering if any seniors have dealt with this kind of issue; I’d appreciate it if you could share your experience in handling it. . . Additionally, the measurement medium is steam at 10 bar.
For photos, please see the attachment. Failed to upload the theme page.
Shrinking like this should not meet the installation requirements.
Of course, the large and small ends are separated from the gauge
It’s also possible that the piezoelectric crystal is faulty
The large and small ends are right next to the gauge, so there’s no straight section; it’s definitely impossible to get an accurate measurement
Keep the large and small ends away from the meter head; reduce the frequency, and the flow rate will decrease. If there is interference, reduce the value that corresponds to the low flow rate and set it higher – you can give it a try
It is prohibited to have a diameter change before the flow meter; if a diameter change is necessary, the pipeline should be adjusted to a straight section with the same diameter as that of the flow meter. A straight section of at least 10 units in length ahead and 5 units behind the flow meter should be welded together to ensure measurement accuracy.
I have encountered the issue of static electricity occurring with domestically produced flowmeters. It turned out that our own flowmeters were grounded before leaving the factory, and grounding was also provided at the installation site; this dual grounding led to the generation of static electricity. I hope this information is useful to you! ! ! !
The grounding screw on the table body isn’t connected; it helps to reduce electromagnetic interference when it is connected
It wasn’t installed correctly; there is a necking issue. To address this necking, it’s necessary to do so 10D in front and 5D behind. It’s suspended, and any slight vibration can cause interference; it is recommended to add another section of channel steel between the two existing ones and fix it to those channel steels