Electromagnetic flowmeter signal is getting smaller and smaller reasons and solutions

Case introduction

Electromagnetic flowmeter signals are getting smaller and smaller or do not receive signals, which are minor problems.

There is no need to panic if this happens. As long as you carefully do the following procedures, you can solve the problem:

1. First determine whether the pipeline is filled with liquid;

2. If the pipe is too close to the wall, it is necessary to install a measuring head on the pipe diameter with an inclined angle, and do not install a measuring head on the horizontal pipe diameter;

   

3. Carefully select the tight part of the pipe and fully polish it, apply sufficient coupling agent and install the measuring head;

4. Carefully and slowly move each measuring head near the installation location to find the place with the strongest signal to avoid the ultrasonic beam being refracted out of the intended direction due to scale on the inner wall of the pipe or local deformation of the pipe. and miss the installation point that can receive stronger signals;

   

5. Metal pipes with serious fouling on the inner wall of the electromagnetic flowmeter can be Use the tapping method to loosen or crack the scaled part, but be aware that this method sometimes does not contribute to the transmission of ultrasonic waves because there is a gap between the scaled scale and the inner wall.