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The portable flow meter comparison device for acceptance and operation technical specifications of 1.... 355-2019
Referring to HJ 354201
9, the core features and requirements of the portable flow meter comparison device for acceptance and operation technical specifications of HJ 3552019 are as follows: Equipment name and model: Equipment name is portable open channel flow meter comparison device. The model example is HXF3 type. Comparison test method: Liquid level comparison: By combining with an ultrasonic open channel flowmeter, a comparison test is conducted on the liquid level values of the same water level observation section. Flow comparison: Conduct a comparison test on the instantaneous flow of the same section. After 10 minutes of timing, read the cumulative flow of two flow meters separately. Shuxunxiang records and calculates: Liquid level data: automatically records liquid level data every two minutes for 6 consecutive times. Error calculation: The maximum error value is calculated as the liquid level comparison error of the flowmeter, and the error index limit is required to be 12 millimeters. Flow comparison error: Calculate the cumulative flow comparison error of two flow meters, with an error index of ± 10% per mu source stroke limit. Report generation: The device is capable of generating comparison and acceptance reports, making the comparison results intuitive and clear. Calibration and Certification: Each flowmeter comes with a calibration certificate from an authoritative testing institution at the factory to ensure the accuracy, reliability, and authority of the comparison results. Convenient operation: The device adopts a color touch LCD screen, providing fully guided operation, mak
9 and HJ 3552019 acceptance and operation technical specifications, and is suitable for the installation, acceptance, operation, and data validity verification of online monitoring systems for water pollution sources.
2. Portable open channel flowmeter under HJ 354-2019 standard
Portable open channel flowmeter under HJ 354-2019 standard should meet the following requirements:
1. Function acceptance requirements: Time setting, calibration, and display function. Portable open channel flowmeter should have time setting function, allowing users to set and adjust 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 subseq
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