A detection method for instrument constant test using standard meter method
A technology of instrument constants and detection methods, which is applied in the direction of instruments, measuring devices, and measuring electrical variables, can solve problems such as inaccurate judgment of test conclusions, and achieve the effects of accurate detection conclusions, reliable detection methods, and slowing down of percentile changes
A technology of instrument constants and detection methods, which is applied in the direction of instruments, measuring devices, and measuring electrical variables, can solve problems such as inaccurate judgment of test conclusions, and achieve the effects of accurate detection conclusions, reliable detection methods, and slowing down of percentile changes
CN111413661BActive Publication Date: 2022-03-29ZHENGZHOU WONDER ELECTRICAL POWER
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[0026] The technical solutions of the present invention will be described in further detail below through specific implementation methods.
[0027] The present invention provides a kind of detection method that adopts standard table method to carry out instrument constant test, such as figure 1 shown, including the following steps:
[0028] Step 1, connect the voltage circuit of the standard meter and the voltage circuit of the electric energy meter under test in parallel, and connect the current circuit of the standard meter and the current circuit of the electric energy meter under inspection in series;
[0029] Step 2, apply the reference voltage of the tested electric energy meter to the standard meter, and read the current forward active total electric energy of the tested electric energy meter as the initial electric energy value E 1 ;
[0030] Step 3, apply the maximum current of the electric energy meter under test to the standard meter, and start the test after the ...
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The invention provides a detection method for meter constant test by adopting the standard meter method, which includes connecting the standard meter with the electric energy meter under inspection; applying the reference voltage of the electric energy meter under inspection to the standard meter, and reading the current normal voltage The active total electric energy is used as the initial electric energy value; apply the maximum current of the tested electric energy meter to the standard meter, set the phase angle to 0°, and start the test after the power output of the standard meter is stable; accumulate the electric energy value of the standard meter, when When the accumulated electric energy value of the standard meter is within the preset range, adjust the phase angle according to the preset phase shift angle; continue to accumulate the electric energy value of the standard meter, and when the accumulated electric energy value of the standard meter is not less than the preset standard travel threshold, read the detected The current total forward active energy of the electric energy meter is used as the termination electric energy value; calculate the difference between the termination electric energy value and the initial electric energy value of the electric energy meter under inspection, and calculate the error γ of the electric energy meter under inspection; if the γ does not exceed the basic error limit, it is pass, otherwise fail.
Description
technical field [0001] The invention relates to a detection method for an instrument constant test, in particular to a detection method for an instrument constant test using a standard meter method. Background technique [0002] [Instrument constant test] is a testing item required by the National Metrology Verification Regulations JJG596-2012. There are three implementation methods for this test, among which [standard meter method] is the most commonly used detection method for [instrument constant test]. [0003] The test requires that, under the conditions of reference voltage, maximum current and cosφ(sinφ)=1, run for a period of time, after stopping the operation, press The formula calculates the error γ of each watt-hour meter to be tested, and it is required that γ does not exceed the basic error limit; among them, γ0: the established system error of the standard meter, γ0=0 when no correction is required; W': each watt-hour meter to be tested stops The difference b...
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Patent Timeline
29 Mar 2022
Publication
CN111413661B
- IPC
- G01R35/04
- CPC
- G01R35/04
- Inventors
- 李建新; 李付周