Differential pressure flowmeter verification system

Abstract

The invention provides a differential pressure flowmeter verification system and aims at solving the problem that a differential pressure flowmeter verification system in the prior art is large in verification error, complicated in operation and the like. The differential pressure flowmeter verification system comprises an industrial computer, a differential pressure verification module, an electromagnetic flowmeter standard table and a highway addressable remote transducer (HART) converter. The differential pressure verification module comprises a data processing module and a control module and is built in the industrial computer. One end of the HART converter is connected with an HART interface built in a differential pressure flowmeter transducer to be verified, and the other end of the HART converter is connected with the data processing module of the differential pressure verification module through a computer interface. The electromagnetic flowmeter standard table is connected with the industrial computer through an RS232 data interface on the electromagnetic flowmeter standard table. The differential pressure flowmeter verification system has the technical advantages of avoiding system errors at a data acquisition stage of a verification table and some errors caused by misoperation and improving the accuracy of verification results and work efficiency.

Description

[0001] field of invention [0002] The invention relates to a differential pressure flowmeter verification technology, in particular to a differential pressure flowmeter verification system. Background technique [0003] The prior art differential pressure flowmeter verification system obtains the verification table by collecting and calculating the 4-20mA current output signal output by the transmitter of the differential pressure flowmeter to be verified (hereinafter referred to as the verification table) by the voltage signal acquisition integrator. differential pressure value. The specific process is that the voltage signal acquisition integrator converts the current signal output by the calibration meter transmitter into a voltage signal through a current-voltage conversion circuit, and then, the analog-to-digital conversion module AD (hereinafter referred to as It is the AD module) to convert the voltage signal into a digital signal, and then through the algorithm pro...

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the problems of large verification error and complicated operation in the prior art differential pressure flowmeter verification system, the present invention proposes a differential pressure flowmeter verification system

Images