Common causes of abnormal operation of sewage electromagnetic flowmeter

(1) The insulation of the excitation coil is reduced to ground, resulting in a small measurement result;
(2) The contact resistance of the excitation circuit cable connection becomes large, the excitation circuit of the converter is in a non-constant current working region, and the excitation current is decreased, which also causes the measurement result to be too small. If the contact resistance is unstable, the measurement value fluctuates.
(3) The insulation of the signal line to the ground decreases, causing signal attenuation, and finally the measurement result is too small;
(4) The insulation performance of the signal line excitation line to ground is declining, making the measurement result much larger than normal data. If the interference is not stable, the influence on the meter of the hot water flow meter is also variable, followed by fluctuations;
(5) The contact resistance at the connection point of the signal cable becomes larger, so that the measured value becomes smaller. If the contact resistance is not stable, the measured value cannot be stabilized and interference can be easily introduced.
The above abnormal conditions occur in the signal loop, so it is difficult to judge. Only in-depth scene, after troubleshooting the other possible problems of the circulating water flowmeter, it is necessary to check whether the cable is in trouble. The on-site instrument maintenance personnel only needs to measure the field resistance of the field loop resistance. Compare the value with the data provided by the manufacturer, test the grounding resistance, determine the problem step by step, and then take measures, or replace the entire cable, or keep the cable connector dry.

FHM fence factory provides a variety of Airport Fencing Of Welded Wire for your supplying chain/warehouse.You could have a multiple choice here.This Airport Fence is Welded Wire Mesh Fence panel with razor barbed wire, Airports and aviation buildings are sensitive areas that require perimeter fencing solutions that stand up to the high risk levels. There are also demands from a legislative and legal aspects that are often unique to aviation based environments.

Airport Fencing Of Welded Wire

Airport Fencing Of Welded Wire,Welded Wire Airport Fencing,Plastic Mesh Fencing,Metal Mesh Fence

DINGZHOU FEIHONG METAL MESH CO.,LTD , https://www.fhmfencing.com

Posted on