The clamp-on ultrasonic flowmeter is easy to use and is favored by the majority of users. However, due to improper installation or improper debugging, inaccurate readings of the clamp-on ultrasonic flowmeter occur from time to time. So how do we conduct self-check under normal circumstances?
1. Due to the paint on the outside of the pipeline, the rust has not been removed. Re-clear the pipe and install the sensor.
2. The pipeline surface is uneven or the ultrasonic flowmeter is installed at the welding seam. The solution to this situation: Grind the pipe or keep it away from the weld.
3. The roundness of the pipe is not good, the inner surface is not smooth, and the pipe has a pipe structure. If the pipe is a cast iron pipe, this may happen. Solution: Choose a place where the inner surface of the pipe is smooth or lined.
4. The solution for the measured medium is pure matter or solid suspended matter is too low: use other types of suitable instruments.
5. When the sensor is installed on the glass fiber pipe, the glass fiber should be removed.
6. The sensor is installed on the casing, which will weaken the ultrasonic signal. The sensor should be moved to the pipe without casing.
7. The sensor is not well coupled with the pipeline, there will be gaps or bubbles on the coupling surface. The couplant should be reinstalled.
The above situation is on the premise that the sensor is good, the flow rate is low or there is no flow rate, and the sensor is damaged or not powered on and other reasons are another matter.