Current position >About Us
1. What are the reasons for the large fluctuations of Elster ultrasonic flowmeter?
The main reasons for the large fluctuations of Elster ultrasonic flowmeter are as follows:
1. Installation problem • Insufficient straight pipe section: The installation position does not meet the requirements of the front 15D and back 5D (D is the diameter of the pipeline), resulting in unstable fluid. Uneven flange surface: The connecting flange has burrs or unevenness, which can cause measurement fluctuations at high flow rates. • Installation is not standardized: the position or pipeline size is not selected according to the manufacturers requirements, and the length of the inlet and outlet sections does not match
2. External interference • Pipeline vibration: mechanical vibration interference signal, which can be checked by observing whether the output fluctuates when there is no flow. Strong interference source: nearby high-power devices (such as frequency converters) affect signal acquisition. • Environmental changes: Temperature fluctuations or electromagnetic interference may cause abnormal data
3. Fluid characteristics • Gas bubbles or air: Gas carried in liquids can cause severe fluctuations when flowing at high speeds. • Changes in fluid properties: Sudden changes in temperature, pressure, or particle concentration affect measurement stability. • Actual flow fluctuation: Unstable process conditions (such as frequency changes in variable frequency pumps, frequent valve opening and closing)
4. Equipment itself • Probe failure: Abnormal sound wave transmission caused by wear, scaling, or condensation, manifested as irregular data jumps. Converter issue: The circuit board may be damp, the power supply may be unstable, or the parameter settings may be incorrect, which may display an "ERR" error message. Improper selection: Low end models have insufficient accuracy at low flow rates, or their calibration status does not match actual needs.
2. The introduction of ultrasonic flowmeter is concise and easy to understand.
The pipe section ultrasonic flowmeter is an instrument that measures the liquid flow inside a circular pipe based on the principle of "velocity difference method".
. It adopts advanced multi pulse technology, signal digital processing technology, and error correction technology, making flow meters more adaptable to the environment of industrial sites, and measuring more conveniently, economically, and accurately. Below, we will introduce the relevant characteristics of ultrasonic flow meters for your reference.1. Introduction
1. Definition: Ultrasonic flowmeter is an instrument that measures flow by detecting the effect of fluid flow on ultrasonic beams (or ultrasonic pulses).
. 2. Principle: According to the principle of signal detection, ultrasonic flowmeters can be divided into propagation velocity difference method (direct time difference method, time difference method, phase difference method, and frequency difference method), beam offset method, Doppler method, cross-correlation method, spatial filtering method, and noise method. Ultrasonic flowmeter, like ultrasonic flowmeter, is an unobstructed flowmeter due to the absence of any obstruction in the instrument flow channel. It is a type of flowmeter suitable for solving the difficulty of flow measurement, especially in large-diameter flow measurement, and has outstanding advantages. It is one of the rapidly dev