Common faults and solutions for ultrasonic flowmeters

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I. Phenomenon: Sharp fluctuations in the flow rate display values. Reason: The sensor is installed in areas where the pipeline vibrates heavily, or downstream of control valves, pumps, or throttle valves. Remedial measure: Install the sensor in a location far from vibrations or move it upstream of the device that alters the flow pattern. Phenomenon: The sensor is fine, but the flow rate is low or non-existent. Cause: 1. Paint and rust in the pipes have not been completely removed. 2. The pipe surface is uneven or installed at a weld seam. 3. The sensor is not properly coupled to the pipe; there are gaps or bubbles in the coupling area. 4. Installing the sensor on the sleeve weakens the ultrasonic signal. Remedial actions: 1. Clean the pipeline again and install sensors. 2. Smooth the pipe or install the sensor away from the weld. 3. Reapply the coupling agent. 4. Move the sensor to the section of the pipe without a sleeve. II. Phenomenon: Incorrect readings. Cause: 1. The sensors are installed at the top and bottom of horizontal pipes, and sediment interferes with the ultrasonic signals. 2. The sensor is installed on a pipe with fluid flowing downward, and the pipe is not fully filled with fluid. Remedial measures: 1. Install sensors on both sides of the pipeline. 2. Install the sensor on the pipe section filled with fluid.