Common faults and analysis of ultrasonic liquid level meter
The installation and maintenance of the ultrasonic level meter is simple and convenient, and more and more love to the user’s favor, but the ultrasonic level meter sometimes encounters some minor faults in the process of use. In the face of these faults, the flowmeter manufacturer Aister meter teaches you how to operate.
1, the liquid level suddenly becomes smaller: the main check whether the positive pressure chamber pressure system is blocked, leaked, gas collection, lack of liquid, balance valve is closed, etc. The specific way to check whether the pressure induction system is smooth is to stop the transmitter, open the blowdown valve, and check the blowdown situation (except the media that can not leak out).
2, the liquid level fluctuates frequently: first of all, combined with the process personnel to check the feeding and discharging conditions, to determine the normal process condition, can be stabilized by adjusting PID parameters. The specific method is: adjust the valve pitcher dynamic state, first adjust the set value consistent with the measured value, so that the liquid level fluctuation is stable, and then slowly adjust the opening of the regulating valve, so that the liquid level slowly rises or falls to meet the process requirements, and then adjust the set value consistent with the measured value, until the parameters are stable.
