About the use and selection characteristics of ultrasonic flowmeter
As a non-contact measuring method, the ultrasonic flowmeter has no pressure loss and is easy to install. It is welcomed by users. However, if the actual measurement situation of the customer is not paid during the use, it may lead to inaccurate measurement or even uncertainty.
Below I will make a summary of the selection and use of ultrasound, hoping to play a certain reference role for users of ultrasound.
As an important reference for speed-type velocity flowmeters, the flow rate needs to be provided by the customer during the selection. Usually the customer can provide specific flow. For the flow rate, many customers have no specific concept. At this time, according to the flow rate and flow rate. Relationship: Q=2827*D2*V, this engineering type is used to calculate the minimum flow and maximum flow of the customer, critical flow and other data, to provide users with accurate measurement accuracy, and the measurement accuracy is different at different speeds. For example, 1% accuracy refers to the accuracy between 0.3-5m/s. If the accuracy of 0.5 is required, the speed needs to be above 0.5, and the actual calibration is performed in the calibration device, and one year is required to be calibrated. In advance to the user, in order to obtain the user's understanding, in the fire cycle water measurement, the usual flow rate is less than 0.1m / s, the actual accuracy is 2% -3%, this time more tests are in the case of small flow Can show whether there is enough signal output for the user to alarm. The instrument unit of Shanghai Hao Industrial Co., Ltd. has installed a limit device for the ultra-low ultrasonic flowmeter LKUF ultrasonic flowmeter series developed by different users, which distinguishes users with precision requirements from users with small flow rates. Ultrasonic flowmeter features for production and monitoring of users
Ultrasonic installation has high requirements for straight pipe sections and air bubbles. This aspect is especially noticed by users, especially at the boundary between laminar flow and turbulent flow. If it is not handled properly, or even a serious accident where traffic does not show up, for this situation, Considering the combination of ultrasonic level measurement and computer monitoring, the alarm is automatically realized, especially in chemical plants. The flow disorder is easy to cause explosion and shutdown. It is recommended that users install it. The instrument division of Shanghai Hao Industrial Co., Ltd. can provide users with This kind of solution.
Due to its principle, the ultrasonic flowmeter has a very prominent cost advantage in the measurement of large diameter. In the diameter of a DN1200, the electromagnetic flowmeter is used, and the cost of the Shanghai LKEF electromagnetic flowmeter is also about 100,000 yuan. However, the Shanghai ç…ç¨LKUF ultrasonic flowmeter is used. As long as the selection is proper, the accuracy can be guaranteed at 0.5%, close to the accuracy of the electromagnetic flowmeter, the cost is about 30,000 yuan, and for the DN1000 or above, to solve the instability of the customer's ultrasonic operation. Worry, the LKUF ultrasonic flowmeter is guaranteed for two years.
A chemical plant or other large-scale factory has hundreds of flow devices. If it is calibrated every year, the labor cost of calibration and the labor cost, it is quite amazing. For some monitoring occasions, there is no trade settlement flow meter. Ultrasonic hand-held or portable inspection is recommended. For the handheld type, it can be calibrated every year, and the calibration accuracy can be controlled within 0.5%. This can not only complete the company's calibration tasks, but also greatly save the company's cost and labor costs. In line with the requirements of national energy conservation and emission reduction, LKUF-S and LKUF-B series of handheld and portable ultrasonic flowmeters developed by the Instrument Division of Shanghai Hao Industrial Co., Ltd. use German technology to import circuit boards. It can effectively solve customer's problems and save customers a lot of verification costs and labor costs.
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