Verification Regulations for Open Channel Flowmeters | Flow Measurement Regulations for Monitoring Total Water Pollutant Emissions?

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1. Portable open channel flowmeter under HJ 354-2019 standard

The portable open channel flowmeter under HJ 354-2019 standard should meet the following requirements:

1. Functional acceptance requirements: Time setting, calibration, and display function. The portable open channel flowmeter should have time setting function, allowing users to set and adjust the time according to their needs. The flowmeter should provide time calibration function to ensure the accuracy of time display. The flowmeter should be able to clearly display relevant information such as current time and measurement data. The flowmeter should have automatic zero calibration and range calibration functions, which can automatically adjust the zero point to ensure measurement accuracy. At the same time, the flowmeter should also have a range calibration function, which can adjust the range according to actual measurement needs. During the calibration process, the flowmeter should record the calibration time, calibration concentration, and main parameters before and after calibration for subsequent analysis and traceability. The flow meter should be able to display real-time measurement data, including key information such as liquid level and flow rate, for testing data display, storage, and output functions. The flowmeter should have data storage function, which can save historical measurement data for subsequent analysis and comparison. The flowmeter should also provide data output function, supporting the export of data to external devices or systems for further processing and analysis. The flow meter should be able to set a three-level system login password to ensure the security of the device and the confidentiality of data. Password

Verification regulations for open channel flow meters

s of different levels should correspond to different operational permissions for hierarchical management of devices. In the event of an unexpected power outage, the flow meter should be able to automatically discharge any remaining samples, reagents, etc. in the system to prevent contamination and blockage. When the power is turned off and reconnected, the flowmeter should be able to automatically clean and reset to the state of resuming measurement, ensuring the continuity and accuracy of the measurement. The flow meter should have fault alarm function, clear return differential display and diagnostic function, and can automatically send an alarm signal when the equipment malfunctions. The alarm signal should be clearly displayed on the equipment, while providing diagnostic information on the fault type and possible cause of skin fracture. The flowmeter should also be able to output fault alarm signals to the remote control network for timely notification to relevant personnel for handling. The limit alarm and alarm signal output function of the flowmeter should be able to set the limit values of the measurement parameters. When the measured value exceeds the set limit value, an alarm signal should be automatically issued. The alarm signal should be able to be output to the remote control network or other related equipment for timely measures to be taken for processing. The flowmeter should be able to receive external trigger commands from the remote control network, such as starting analysis, stopping measurement, and other operational instructions. This enables the flow meter to be linked with other systems or devices, achieving more efficient measurement and management.

2. Performance Acceptance Method: The li

Verification Regulations for Open Channel Flowmeters | Flow Measurement Regulations for Monitoring Total Water Pollutant Emissions?

1. Portable open channel flowmeter under HJ 354-2019 standard

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