Q: What is the instantaneous flow fluctuation of the ultrasonic flowmeter? Answer: A, the signal intensity fluctuates greatly; B, the measured fluid fluctuation is large; Solution: Adjust the position of the ultrasonic sensor, improve the signal strength, and ensure the signal strength is stable. If the fluid fluctuation is large, the position is not good. Re-select the point to ensure the 5D working condition after the first 10D.