The portable ultrasonic flowmeter has great mobility and is suitable for temporary measurement. The probe can be installed on the outer surface of the pipeline to achieve continuous flow measurement without damaging the original pipeline. It has extremely low operating energy consumption and can be conveniently powered by batteries for a long time. Therefore, it is widely welcomed by users. It can use the on-site AC power supply or the built-in rechargeable battery. It can work continuously for 5 to 16 hours, which greatly facilitates the need for temporary flow measurement in different occasions. The portable ultrasonic flowmeter is only for on-site viewing of the current flow rate and the cumulative flow rate within a short period of time, so it generally has no output signal function. However, to facilitate the measurement of flow rates in different pipelines, it has rich storage functions and is currently the most widely used liquid portable ultrasonic flowmeter in the water supply industry.
Portable ultrasonic flowmeters can measure flow on pipelines of various diameters and materials with a single flowmeter. They are the preferred type of flowmeter for online calibration, comparison or interim verification as standard meters. They are mainly used to calibrate the operating status of other flowmeters installed on the pipeline, conduct fluid balance tests within a certain area, and check the current flow situation of the pipeline, etc. When used for these purposes without a fixed installation, a portable ultrasonic flowmeter is both convenient and economical.
The portable ultrasonic flowmeter has two sets of probes to choose from (large and small), which are respectively suitable for different pipe diameter ranges. In a sense, the combination of each set of probes and the main unit is an independent flowmeter.
If you only use a small probe on a small pipe diameter flow standard device to verify or calibrate a portable ultrasonic flowmeter, then when you use a large probe to measure the flow of a large pipe during use, it is equivalent to using an unverified or uncalibrated flowmeter to measure the flow, and its measurement accuracy cannot be guaranteed. Any flowmeter needs to be verified or calibrated before use. Portable ultrasonic flowmeters are particularly important at this point.
Therefore, the correct approach should be: taking the user's own usage situation as a reference basis, and conducting verification or calibration of the portable ultrasonic flowmeter on multiple pipelines as much as possible on a flow standard device with the same or close pipe diameter as the one in use. At least ensure that each group of probes configured for the flowmeter is calibrated.
