Portable open channel flowmeter, generally referred to as the portable open channel flowmeter comparison device“HJ 353-2019Online monitoring system for water pollution sources（CODCrTheNH3-NInstallation technical specifications, etc”/ HJ 354-2019Online monitoring system for water pollution sources（CODCrTheNH3-NAcceptance Technical Specifications”/ “HJ 355-2019Online monitoring system for water pollution sources（CODCrTheNH3-NTechnical specifications for operation”All series of technical specifications mention“Comparing device with portable open channel flowmeter……”In daily life, for convenience, it is usually abbreviated as“Portable open channel flowmeter”.

Qiheng Environmental Protection R&D personnel initially developedHX-F3Portable open channel flow meter, combining years of technology and accumulated on-site experience, as well as referenceHJ353Requirements for installation technical specifications“5.2.2Generally, standardized measuring weirs (troughs) such as triangular thin-walled weirs, rectangular thin-walled weirs, and Bacher troughs can be installed”At the same time, conducting on-site research and visits to a large number of sewage discharge enterprises and institutions, observing the actual situation of the discharge outlets on site, and defining the compared weirs as four types, namely“Triangle weir, equal width weir, rectangular weir, Bacher trough”Subsequently, in the subsequent launch of products by peers, the majority of the instrument's weir slot types were defined as these four types, serving as the standard comparison weir slot types for portable open channel flow meters.

withHX-F3/F5The portable open channel flowmeter has been widely used in the market. Some customers have provided feedback that we use the weir groove at our on-site sewage outlet“Circular edged broad topped weir”、“flatVType weir”How to conduct on-site flow meter comparison work for this type of weir groove?

Based on the actual situation on site, the technical R&D personnel communicated with the customer and“JJG711-1990Trial Verification Regulations for Open Channel Weir Flow Meter”The excavation of the middle weir channel type and repeated testing and adjustment on site and in the laboratory have successfullyJJG711-1990As mentioned in the verification regulations9All types of weirs and channels have been added to the upgraded portable open channel flowmeter.

The newly upgraded portable open channel flowmeter supports triangular weirs (thin walled weirs), rectangular weirs (thin walled weirs), equal width weirs (thin walled weirs), Bacher slots, throat free slots, rectangular wide top weirs, circular edge wide top weirs, triangular profile weirs, and flat weirsVType weir9Planting weir channels can meet the requirementsJJG711-1990As mentioned in the verification regulations9Comparison work of flow meters for planting weir channels and open channels.