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How does a volumetric flowmeter measure minute flow

Date:2019-12-05 source:

The volumetric small-diameter flowmeter has relatively high accuracy, and it is not very feasible to accurately measure the low liquid limit. For example, the elliptic transmission gear flowmeter (micro-flow light fuel oil flowmeter) has a detection range of 0.1~10L/h. After the instantaneous velocity flow of > 1L/h, the base deviation does not exceed ± 1% R.The volumetric flowmeter ensures that the low flow limit of accuracy is also related to the viscosity of fluid mechanics. The fluid mechanics with low viscosity has a relatively large amount of leakage from the clearance of tissues, thus ensuring that the low flow limit of accuracy only has a fixed length that is not higher, and conversely, can be set at a lower level.

How does a volumetric flowmeter measure minute flow

How does a volumetric flowmeter measure minute flow

The new volumetric flowmeter has also been introduced electronic information technology, the meter built-in single-chip microcomputer design, flow index integral quantitative analysis, instantaneous velocity flow calculation, integration and operation, instantaneous velocity flow and accumulated flow local display information, embedded with two lithium, can instrument operation for 8 years.The OC gate outlet of the meter can output the differential signal with sufficient amplitude analyzed by integer quantification (such as 100P/L for flow index of small-diameter meter) to the main control room or actual operation station within 1km for recording and adjustment.

According to its basic principle, the volumetric flowmeter is divided into several kinds of elliptic transmission gear flowmeter, waist wheel flowmeter, rotating piston flowmeter, etc., but the small-diameter volumetric flowmeter has a mutual regulation, that is, the front of the meter near enough to refit the filter device, and the smaller the diameter of the meter, the larger the mesh size of the filter.For example, for 25~50mm diameter (25.4mm length), 60 mesh filter, 20mm diameter (25.4mm length), 80 mesh, not exceeding 15 caliber (25.4mm length), 200 mesh, etc.Some micro-flow volumetric flowmeters are originally installed with a filter device.

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