Analysis of Signal Problems of Electromagnetic Flowmeter

When measuring with electromagnetic flowmeters, we often have to consider how to deal with issues such as unacceptable signals or too weak signals. We should look for the following possible problems:

1. If the pipe is too close to the wall, install the probe on a pipe with a sloping angle, and instead of installing it on a horizontal pipe diameter, use the Z method to install the probe.

2. Verify that the tubing is full of fluid.

3. Carefully select the dense part of the pipe and polish it thoroughly. Apply a sufficient amount of chelating agent to install the probe.

4. Carefully and carefully move each probe near the mounting point to find the maximum signal point to prevent the ultrasonic beam from reflecting the expected area due to fouling of the inner wall of the pipe or due to local deformation of the pipe and miss the possibility of receiving a stronger signal. Installation point.

5. The metal pipe with serious fouling of the inner wall can be used to make the scaling part fall off or crack, but it should be noted that sometimes this method will not help the transmission of ultrasonic wave because of the gap between the scaling and the inner wall.

Maintenance of electromagnetic flowmeters should follow a certain order, so as to avoid entering the pitfalls of maintenance and causing unnecessary delays and losses. The electromagnetic flowmeter repair in the end what steps should be carried out is the best way to repair the electromagnetic flowmeter in the end what are the benefits, this is our use as an electromagnetic flowmeter instrumentation workers should consider, good quality electromagnetic flowmeter Normally, no routine maintenance is required. However, if the measured medium is likely to adhere or foul on the inner wall of the electrode and the measuring tube, the inner wall of the measuring tube and the electrode must be cleaned periodically, taking care not to damage the lining or the electrode. If your electromagnetic flowmeter fails, we suggest that you can find, analyze and troubleshoot one by one by referring to the following sequence.

First, whether the medium in the measuring tube is full or not, whether the lining and the electrode are fouled, and whether all the cable connections are reliable;

Second, whether the grounding requirement is satisfied; whether the excitation coil is short-circuited or open circuited, and whether it is insulated from ground;

Third, whether the medium in the pipe system is leaking, whether the upstream and downstream valves are affected, and whether the installation position is appropriate;

Fourth, whether the surrounding environment has caused interference to the flowmeter; whether the converter fails.

In addition, regarding the recheck period of the electromagnetic flowmeter, it is recommended that the electromagnetic flowmeter be checked and repaired every two years. Users who have high requirements for accuracy should be submitted for inspection every year.