Large-diameter electronic water meter online verification method

Abstract

The invention discloses a large-diameter electronic water meter online verification method and relates to the technical field of water meter verification. The method comprises the following steps of: S1, determining the maximum allowable error value of a water meter according to the accuracy class of the water meter and the temperature of a water flow; S2, fixing an externally clamped ultrasonic flowmeter to a measured pipeline to measure an actual flow value in the pipeline; S3, measuring the actual flow values of various measurement points at the respective measurement points of the measured pipeline; S4, measuring each measurement point multiple times and taking an average flow value; and S5, obtaining a difference between the average flow value and a displayed flow value to obtain the online verification result of the large-diameter electronic water meter. In the verification process, the externally-clamped ultrasonic flowmeter measures the actual flow value in the measured pipeline, which does not affect the normal living and production water of residents and factories, and does not occupy or interrupt the normal use of the large-diameter electronic water meter, namely achieves the online verification of the large-diameter electronic water meter.

Description

technical field [0001] The invention relates to the technical field of water meter verification, in particular to an online verification method for a large-diameter electronic water meter. Background technique [0002] Due to the characteristics of its measurement principle, the electronic water meter is especially suitable for measuring large-diameter liquid pipelines. It has a large number of applications in urban water supply and sewage treatment industries, and the measurement effect is very good. After long-term use, electronic water meters will inevitably produce systematic errors or data drift due to environmental changes, so regular verification is required. [0003] The existing authorized notification number is the Chinese patent of CN104019871B, which discloses a field calibration instrument for household water meters and a verification method thereof, including an on-site calibration instrument and an external conversion and sending device. The on-site meter cal...

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Problems solved by technology

[0004] However, using the above-mentioned calibration instrument and calibration method to complete the verification of electronic water meters requires the occupation of water pipes and electronic water meters to be verified, which affects the normal life of residents and normal production of industries, and even interrupts the normal operation of domestic and industrial water supply. , the existing technology can be improved

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