The portable open channel flowmeter is suitable for four basic weir types: triangular weir, rectangular weir, equal width weir, and Bacher trough

Description :

The portable open channel flowmeter is suitable for four basic weir types: triangular weir, rectangular weir, equal width weir, and Bacher trough

The portable open channel flowmeter is suitable for four basic weir types: triangular weir, rectangular weir, equal width weir, and Bacher trough

Model: XY-6800R

Brand: Qingdao Xinye

1Technical background and application

　　In order to implement the Environmental Protection Law and the Water Pollution Prevention and Control Law, protect the ecological environment, and safeguard human health, the Ministry of Ecology and Environment issued the "Technical Specifications for Installation of Online Monitoring Systems for Water Pollution Sources (CODCr, NH3-N, etc.)" and "Technical Specifications for Acceptance of Online Monitoring Systems for Water Pollution Sources (CODCr, NH3-N, etc.)" on December 24, 2019. In the "Installation Technical Specification", it is proposed that a flow monitoring unit is required in the composition of the online monitoring system. For the discharge units that need to measure the flow, standardized measuring weirs for open channels should be constructed

　　(Channel), and the construction of weir channels should be able to conduct comparison work of open channel flow meters. Triangular weirs, rectangular weirs, and Bacher channels are recommended. In the "Acceptance Technical Specification", specific requirements are proposed for the acceptance method of water pollution source flow monitoring units, which are divided into liquid level error comparison and flow error comparison, as follows:

　　(1) Liquid level error comparison: Use a portable open channel flow meter comparison device (liquid level measurement accuracy ≤ 0.1 mm) and an ultrasonic open channel flow meter to measure the liquid level value at the same water level observation section, conduct a comparison test, record the data pairs every 2 minutes for 6 consecutive times, calculate the error value Hi of each data pair, and select Hi as the liquid level comparison error of the flow meter.

　　(2) Flow Error Comparison: Use a portable open channel flow meter comparison device and an ultrasonic open channel flow meter to measure the instantaneous flow at the same water level observation section for comparison experiments. After the data is stable, start timing for 10 minutes. Read the cumulative flow F1 of the open channel flow comparison device and the cumulative flow F2 of the ultrasonic open channel flow meter during this period, and calculate the flow comparison error Δ F according to the formula.

　　According to the above requirements, it can be seen that a portable open channel flowmeter is needed for on-site acceptance. During the acceptance process, continuous statistics and recording of liquid level data and flow data are required. Within 12 minutes, 6 liquid level data of the online open channel flowmeter and 6 liquid level data of the portable sewage flowmeter need to be synchronously recorded

　　Within 10 minutes, synchronously record the cumulative flow data of two online open channel flow meters and two portable sewage flow meters. Moreover, because the sewage flow monitoring process is irreversible, once problems occur during the recording process, it is necessary to conduct a new comparison and acceptance, which brings difficulties to the on-site acceptance work in terms of time and space.

　　In response to the current lack of portable sewage flow meters in China that can easily and quickly complete the above acceptance tasks, our company has developed a portable open channel flow meter that meets the on-site acceptance requirements for open channel flow meters based on years of experience in environmental monitoring instrument research and development, combined with the technical specifications for installation of online monitoring systems for water pollution sources (CODCr, NH3-N, etc.), the technical specifications for acceptance of online monitoring systems for water pollution sources (CODCr, NH3-N, etc.), and the technical requirements and testing methods for ultrasonic open channel sewage flow meters in HJ 15-2019. This portable open channel flow meter is mainly used for on-site technical parameter evaluation and acceptance of online open channel sewage flow meters, and can also be extended to flow measurement of open channel sewage discharge in enterprises.

IIFeatures：

　　(1) Suitable for four basic weir types: triangular weir, rectangular weir, equal width weir, and Bacher trough;

　　(2) High precision signal acquisition module, 24 bit acquisition accuracy, measurement data is true and effective;

　　(3) Large screen color LCD touch screen, touch guided operation, easy operation process;

　　(4) The instrument is equipped with a micro printer, which can directly print measurement data on site;

　　(5) Can be connected to a computer to output measurement data to a USB flash drive, making it easy for users to perform statistical analysis on the data;

　　(6) Can store 20000 measurement history records;

　　(7) Equipped with a large capacity lithium battery, it can measure continuously for 72 hours on a single charge;

　　(8) Handheld box design, lightweight and convenient for users to carry.

　　(9) GPS positioning remote communication control function (optional)

　　IIIexecution standard：

　　JJG711-1990 "Trial Verification Regulations for Open Channel Weir Flow Meter"

　　HJ/T15-2019 "Technical Requirements and Testing Methods for Ultrasonic Open Channel Sewage Flowmeters"

　　HJ 354-2019 Technical Specification for Acceptance of Online Monitoring System for Water Pollution Sources (CODCr, NH3-N, etc.)

4、 Technical parameters:

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• Portable open channel flowmeter