Online checking method of a power meter with metering interface

Abstract

The present invention provides an online checking method of a power meter with a metering interface. The power meter comprises a measurement mechanism, an electronic measurement circuit and binding posts A-D; a jack A, a switch A and a jack B are arranged in order between the electronic measurement circuit and the binding post A, a jack C and a switch B are arranged in order between the electronicmeasurement circuit and the binding post B, a jack D is arranged between the electronic measurement circuit and the binding post C, and a jack E and a switch C are arranged in order between the electronic measurement circuit and the binding post D. Five fixed end electrical connectors and two switches are designed on the housing of the power meter to perform online checking to avoid the problem caused by dismounting inspection and even line disconnection for checking so as to achieve online checking and in-situ metering. The power meter with the metering interface achieves on-off of a measurement circuit through a switch button so as to complete metering (checking) through measurement of the jack external connection standard power source in a condition that an instrument is not dismounted.

Description

[0001] This application is a divisional application of 2016102861593 "Power Meter with Metering Interface and Method thereof", and the original application date was May 4, 2016. technical field [0002] The invention relates to a power meter, in particular to an on-line inspection method of a power meter with a measurement interface, which has the functions of on-line inspection and in-situ measurement. Background technique [0003] In order to ensure the accurate value of the power meter in use, according to the provisions of JJG124-2005 "Ammeter, Voltmeter, Power Meter and Resistance Meter" of the National Metrology Verification Regulations of the People's Republic of China, the power meter needs to be verified, and the cycle is one year. The main items of verification include: visual inspection, basic error verification, verification of up and down variation, and deviation from zero. [0004] At present, none of the power meters in use has a detection interface. The detec...

AI Technical Summary

Problems solved by technology

In this process, shutting down and power off, disassembling and assembling the power meter, and road transportation not only consume a lot of manpower, financial resources and time, but also may cause equipment and power meter failure due to disassembly and assembly.

In addition, during transportation, especially on the way back, the failure probability of the power meter will increase due to bumps, vibrations, etc.

Even if the on-site environmental conditions meet the requirements of the verification regulations, the user needs to stop the machine, cut off the power, and disconnect the connection line between the power meter terminal and the equipment for verification.

[0005] At the same time, when it is suspected that there is a problem with the data displayed by the power meter during the two traceability periods, it can only be shut down and powered off, and the connection line between the power meter terminal and the equipment can only be disconnected for inspection, which will also consume a certain amount of manpower, financial resources and time.

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