Calibration method for ammeter
An electric meter and meter calibration technology, which is applied in the measurement of electric variables, measuring devices, instruments, etc., can solve problems such as meter bumps, product quality effects, and unfavorable production automation, and achieve the effect of convenient and accurate meter calibration.
Active Publication Date: 2015-04-01
XIAMEN GREENER OPTOELECTRONICS
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Problems solved by technology
[0004] The traditional "electrician-style" meter calibration method is to use electric soldering iron, screwdriver and other tools to manually calibrate the meter. The use of these tools will cause damage to the meter, and this calibration method has low adjustment accuracy and poor production repeatability. Production automation, and a large number of human factors will affect product quality, the stability and reliability of the product cannot be guaranteed
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[0033] Such as figure 1 As shown, the meter calibration method of the electric meter of the present invention, the electric meter has a man-machine interface, a power chip with a configurable GSU register, a GSI register, and a phase angle compensation register, and the meter calibration method includes;
[0034] Step 10, connect the external regulated power supply to the voltage input terminal of the ammeter, and connect a resistive load in series with the current terminal of the ammeter to the voltage terminal of the regulated power supply;
[0035] Step 20. Test the input voltage and resistive load current with a meter calibration instrument; the meter calibration instrument is a low-error and high-precision instrument used to test the voltage and current values of the load;
[0036] Step 30, input the voltage value and resistive load current value obtained from the test on the meter calibration instrument into the meter through the man-machine interface of the meter;
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The invention provides a calibration method for an ammeter. The calibration method comprises the following steps: connecting an external voltage-stabilized power supply to a voltage input end of the ammeter, and serially connecting a resistive load and a current terminal of the ammeter to a voltage terminal of the voltage-stabilized power supply; testing the input voltage and the current of the resistive load by a calibration instrument; inputting a voltage value and the current value of the resistive load, which are obtained by testing on the calibration instrument, to the ammeter through a human-computer interface of the ammeter; after reading an electric energy chip voltage register, a current register and a voltage-current phase angel register and calculating the voltage effective value error and the current effective value error, configuring a GSU register and a GSI register according to the calculated result and adjusting a phase angle compensation register so as to realize calibration of the voltage, the current and the power. Therefore, the calibration method can be used for realizing convenient and accurate calibration.
Description
technical field [0001] The invention relates to a method for calibrating electric meters. Background technique [0002] The production of electric energy is different from the production of other products. Its characteristic is that the power plant generates power, the power supply department supplies power, and the user consumes electricity. How to sell electric energy between them and how to make economic settlement requires a measuring instrument to measure among the three departments and calculate the amount of electric energy. The electric energy meter, which is closely related to production and life, is the main tool for current measurement and economic settlement of electric energy. Its performance and accuracy are directly related to the economic interests of the country and users. Therefore, it is very important to adjust the error of unqualified electric energy meters. . [0003] In order to maintain the production order of the national economy and safeguard the ...
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IPC IPC(8): G01R35/04
Inventor 廖良斌卓元全
Owner XIAMEN GREENER OPTOELECTRONICS