On-line calibration exploration of ultrasonic flow meter equipment for water medium measurement

Abstract: The online calibration exploration information of ultrasonic flowmeter meter equipment for water medium measurement is provided by excellent flowmeter and flowmeter manufacturers and quotation manufacturers. On-line calibration exploration of ultrasonic flowmeter equipment for water medium measurement 1. Overview Xingang Vanadium currently has more than 700 secondary measurement points. Unified management by the company's measurement management department. The measurement management department should grasp the situation of each measurement point timely and accurately. Secure these metering points. More flowmeter manufacturers choose models and price quotations. You are welcome to inquire. The following is the details of the online calibration exploration article of ultrasonic flowmeter meter equipment for water medium measurement. Exploration of online calibration of ultrasonic flowmeter equipment for water medium measurement 1. Overview Xingang Vanadium currently has more than 700 secondary measurement points. Unified management by the company's measurement management department. The measurement management department should grasp the situation of each measurement point timely and accurately. Ensure that these metering points operate accurately According to the national mandatory standard GB17167—2006 Requirements of 'General Rules for the Equipping and Management of Energy Measuring Instruments for Energy Consumption Units' and related measurement regulations. As a flow meter for settlement, periodic verification is required. However, the verification period in the regulations cannot guarantee the accuracy of the flowmeter in use. Due to the complexity of the application and the medium, many flowmeters are out of tolerance before the verification period. therefore. The accuracy of the flowmeter cannot be grasped in time. It is necessary to use the verification method of on-site calibration to ensure the accuracy of flow measurement. Second, the technology and skills in the installation process of portable ultrasonic flowmeters In field applications, the actual measurement accuracy is often caused by negligence in work, the installation distance of the transmitter and the flow area. and other measurement errors, resulting in a decrease in accuracy. therefore. How to install and debug portable ultrasonic flowmeter according to specific environment. It has become an important subject in the field of detection. Through the practical operation of the field and the system in the past two years, various factors have been considered. Generally, the influence of the length of the front and rear straight pipe sections can be reduced. Eliminate the influence of the location of the transmitter installed in the field. The measurement accuracy is greatly improved. The installation of the portable ultrasonic flowmeter should be considered from the following aspects: (1) Understand the site situation in detail; (2) Determine the installation method: (3) Select the installation pipeline; (4) Calculate the installation distance and determine the probe position; (5) Pipe surface treatment; (6) Probe installation and wiring. The following points should be paid attention to during the detection process: 1. Portable ultrasonic transmitter location selection Portable ultrasonic flowmeter requires that the liquid in the pipeline must be full. The requirements for the front and rear straight pipe sections during installation are at least 10D for the front and 5D for the rear (D is the diameter of the pipe). If there are elbows, tee, throttle valve, orifice, expanding pipe, reducing pipe and other obstructions installed upstream and downstream, the length of the upstream straight pipe section will be up to 30D, and the downstream straight pipe section generally only needs 5D On the horizontal pipe section, the transmitter is generally installed on the positive side line of the side of the pipe (to avoid signal loss caused by sediment at the bottom of the pipe or air bubbles and cavitation in the upper part of the pipe). It is best to choose a pipe section that has no corrosion or rust spots inside the pipe. To reduce the difficulty and inaccuracy of measurement 2. The installation of the portable ultrasonic transmitter is based on the measurement principle of the ultrasonic flowmeter. The installation of the transmitter is a key factor affecting the accuracy of the measurement. There are generally three types of installation methods: Z-type, W-type and V-type. If the installation distance is between (25 406) 1131/1 (1 inch to 16 inches), the V method should be used for installation; if the installation distance is less than 5lmm (2 inches), the W method should be used. The DCT7088 is equipped with a transmitter sliding scale. The sliding scale is in millimeters. The distance value is marked on the sliding rail. Adjustment is very convenient. Applicable to V method and W method If the installation distance is greater than 406mm (16 inches), the z method should be used for installation, and the sliding scale should not be used at this time. It is advisable to wrap the pipeline with graph paper. Then fold in half along the midline. Then align the horizontal centers of the two transmitters with the two ends of the graph paper for installation. This can ensure that the sound wave signal emitted by the transmitter passes through the axis of the pipeline. Minimize the impact on measurement accuracy. 3. Reason analysis and treatment method of portable ultrasonic wave can not find the signal First of all, different materials of the measuring tube, whether the inner wall of the measuring tube is coated, whether the inner wall of the measuring tube is scaled and other pipeline conditions. The attenuation of the ultrasonic signal is different. When the ultrasonic signal is attenuated greatly. flow will not be measured. Liquid level transmitter: The above is the whole content of this article. You are welcome to inquire about the flowmeter selection and quotation of our factory. 'On-line calibration exploration of ultrasonic flow meter equipment for water medium measurement'

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