CN103163370B - A kind of method of testing of intelligent electric energy meter clock frequency under high-temperature environment - Google Patents
A kind of method of testing of intelligent electric energy meter clock frequency under high-temperature environment Download PDFInfo
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- CN103163370B CN103163370B CN201310060322.0A CN201310060322A CN103163370B CN 103163370 B CN103163370 B CN 103163370B CN 201310060322 A CN201310060322 A CN 201310060322A CN 103163370 B CN103163370 B CN 103163370B
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Abstract
The present invention relates to the method for testing of a kind of intelligent electric energy meter clock frequency under high-temperature environment.Step is as follows: 1) working power AC and switch K1 series connection are followed by power end X2, Y2 of intelligent electric meter, is connected on respectively on clock signal terminal X1, Y1 of intelligent electric meter and counting end X3, Y3 of universal counter after resistance R, set of cells DC and switch K2 series connection；The crystal oscillator frequency output terminals A 1 of standard crystal oscillator generator meets the crystal oscillator frequency input X4 of universal counter through coaxial cable；2) switch K1, K2 remains open, and intelligent electric meter puts into high/low temperature experimental box, adjusts temperature to regulation test temperature；3) Guan Bi switch K1, K2, start universal counter counter switch, opens standard crystal oscillator generator and launches the crystal oscillator frequency of 10MHz, is tested and show the clock frequency of intelligent electric energy meter by universal counter.The positive effect of the present invention is can accurately and reliably to complete under high temperature the test to intelligent electric energy meter clock frequency, simple and convenient.
Description
Technical field
The present invention relates to the method for testing of a kind of intelligent electric energy meter clock frequency under high-temperature environment.
Background technology
Intelligent electric energy meter is the important component part of electricity consumption acquisition system, its reliablely and stablely operational relation to intelligent grid construction progress, more having influence on the safety utilization of electric power of vast power customer, wherein clock frequency is intelligent electric energy meter important parameter, and its accuracy will affect ammeter function and reliability.But during the detection of intelligent electric energy meter, due to the restriction of high-low temperature test chamber volume, it is impossible to use test-bed body to carry out the test of intelligent electric energy meter clock frequency under high-temperature environment, bring huge economic loss to electric power enterprise.
Summary of the invention
The technical problem to be solved there is provided the method for testing of a kind of intelligent electric energy meter clock frequency under high-temperature environment.
The technical solution adopted for the present invention to solve the technical problems:
The step of the present invention is as follows:
(1) working power AC and switch K1 series connection are followed by power supply terminal X2, Y2 of intelligent electric meter, resistance R, set of cells DC and switch K2 series connection are followed by clock signal terminal X1, Y1 of intelligent electric meter；Crystal oscillator frequency input X4, counting end X3, Y3 of described universal counter that the crystal oscillator frequency output terminals A 1 of standard crystal oscillator generator connects universal counter through coaxial cable connect resistance R after concatenation, set of cells DC and the two ends of switch K2；
(2) described switch K1, K2 remain open, and described intelligent electric meter is only put into high/low temperature experimental box, starts high-low temperature test chamber, adjust temperature to regulation test temperature；
(3) described switch K1, K2 are closed, to intelligent electric energy meter making alive so that it is in running order；Start universal counter counter switch, open standard crystal oscillator generator and launch crystal oscillator frequency, test intelligent electric energy meter clock frequency under the high temperature conditions by universal counter.
The model of described universal counter is SC7201；
JS1 Error Calculator selected by described standard crystal oscillator generator, it is provided that the crystal oscillator frequency of 10MHz.
Produced by the present invention, good effect is as follows: this method can accurately and reliably complete the test under high temperature to intelligent electric energy meter clock frequency, simple and convenient, quality management and control for intelligent electric energy meter provides strong technical support, it is to avoid the economic loss brought to electric power enterprise.
Accompanying drawing explanation
Fig. 1 is device therefor annexation schematic diagram of the present invention.
In FIG, 1 intelligent electric energy meter, 2 universal counters, 3 standard crystal oscillator generators, 4 high-low temperature test chambers.
Detailed description of the invention
With embodiment, the present invention is further described below in conjunction with the accompanying drawings:
The work process of the present embodiment is as follows as shown in Figure 1:
1) working power AC and switch K1 series connection are followed by power supply terminal X2, Y2 of intelligent electric meter 1, resistance R, set of cells DC and switch K2 series connection are followed by clock signal terminal X1, Y1 of intelligent electric meter 1；Crystal oscillator frequency input X4, counting end X3, Y3 of described universal counter 2 that the crystal oscillator frequency output terminals A 1 of standard crystal oscillator generator 3 connects universal counter 2 through coaxial cable connect resistance R after concatenation, set of cells DC and the two ends of switch K2；
2) described switch K1, K2 remain open, and described intelligent electric meter 1 is only put into high/low temperature experimental box 4, starts high-low temperature test chamber 4, adjust temperature to regulation test temperature；
3) described switch K1, K2 are closed, to intelligent electric energy meter 1 making alive so that it is in running order；Start universal counter 2 counter switch, open standard crystal oscillator generator 3 and launch crystal oscillator frequency, test intelligent electric energy meter 1 clock frequency under the high temperature conditions by universal counter 2.
The model of described universal counter 2 is SC7201；
JS1 Error Calculator selected by described standard crystal oscillator generator 3, it is provided that the crystal oscillator frequency of 10MHz.
The test temperature of described regulation is 60 DEG C, and 60 DEG C is the maximum operating temperature of intelligent electric energy meter 1.
Described resistance R takes 1.5K Ω, and set of cells DC2 is 6V DC voltage, and working power AC is 220V alternating current power supply.
The model of described universal counter 2 is SC7201；
JS1 Error Calculator selected by described standard crystal oscillator generator 3, it is provided that the crystal oscillator frequency of 10MHz.
The operation principle of the present invention:
Described set of cells DC is 6V DC voltage, and resistance R is pull-up resistor, and resistance is 1.5K Ω, and the electric current that the two external circuit constituted provides need to reach the saturation current of the internal optocoupler of intelligent electric energy meter, and the saturation current of the internal optocoupler of intelligent electric energy meter 1 is about 3mA.Being not added with external circuit is directly cannot to measure the clock frequency at clock signal terminal with universal counter 2 and standard crystal oscillator generator 3.
The accuracy of monitoring is related with measuring instrument (i.e. universal counter 2 and standard crystal oscillator generator 3).Measuring instrument is outside high-low temperature test chamber 4, it is ensured that measuring instrument is not by environmental disturbances.
Claims (2)
1. the method for testing of an intelligent electric energy meter clock frequency under high-temperature environment, it is characterised in that step is as follows:
1) working power AC and switch K1 series connection are followed by power supply terminal X2, Y2 of intelligent electric energy meter (1), resistance R, set of cells DC and switch K2 series connection are followed by clock signal terminal X1, Y1 of intelligent electric energy meter (1)；Crystal oscillator frequency input X4, counting end X3, Y3 of described universal counter (2) that the crystal oscillator frequency output terminals A 1 of standard crystal oscillator generator (3) connects universal counter (2) through coaxial cable connect resistance R after concatenation, set of cells DC and the two ends of switch K2；
2) described switch K1 and switch K2 remains open, and described intelligent electric energy meter (1) is only put into high/low temperature experimental box (4), starts high/low temperature experimental box (4), adjusts temperature to regulation test temperature；
3) described switch K1 and switch K2 is closed, to intelligent electric energy meter (1) making alive so that it is in running order；Start universal counter (2) counter switch, open standard crystal oscillator generator (3) and launch crystal oscillator frequency, by universal counter (2) test intelligent electric energy meter (1) clock frequency under the high temperature conditions.
The method of testing of a kind of intelligent electric energy meter clock frequency under high-temperature environment the most according to claim 1, it is characterised in that the model of described universal counter (2) is SC7201；
Described standard crystal oscillator generator (3) selects JS1 Error Calculator, it is provided that the crystal oscillator frequency of 10MHz.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310060322.0A CN103163370B (en) | 2013-02-26 | 2013-02-26 | A kind of method of testing of intelligent electric energy meter clock frequency under high-temperature environment |
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| CN201310060322.0A CN103163370B (en) | 2013-02-26 | 2013-02-26 | A kind of method of testing of intelligent electric energy meter clock frequency under high-temperature environment |
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| CN103163370A CN103163370A (en) | 2013-06-19 |
| CN103163370B true CN103163370B (en) | 2016-12-28 |
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| CN201993462U (en) * | 2011-01-31 | 2011-09-28 | 浙江省电力公司 | Three-phase intelligent electric energy meter checking device |
| CN102435975A (en) * | 2011-11-07 | 2012-05-02 | 中国电力科学研究院 | Intelligent cost control electric energy meter and clock calibration method |
| CN102692616A (en) * | 2012-01-11 | 2012-09-26 | 华北电网有限公司计量中心 | Automatic test and collection device and method of smart meter |
| WO2012142736A1 (en) * | 2011-04-22 | 2012-10-26 | 四川电力科学研究院 | Field integral detecting system of three-phase electric energy measuring system of electric distribution network |
| CN103091552A (en) * | 2011-10-31 | 2013-05-08 | 无锡华润矽科微电子有限公司 | Pre-calibrated electric energy metering circuit and calibration method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102636770A (en) * | 2012-05-11 | 2012-08-15 | 河北省电力研究院 | Test method of service life of intelligent electric energy meter |
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- 2013-02-26 CN CN201310060322.0A patent/CN103163370B/en active Active
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|---|---|---|---|---|
| CN201993462U (en) * | 2011-01-31 | 2011-09-28 | 浙江省电力公司 | Three-phase intelligent electric energy meter checking device |
| WO2012142736A1 (en) * | 2011-04-22 | 2012-10-26 | 四川电力科学研究院 | Field integral detecting system of three-phase electric energy measuring system of electric distribution network |
| CN103091552A (en) * | 2011-10-31 | 2013-05-08 | 无锡华润矽科微电子有限公司 | Pre-calibrated electric energy metering circuit and calibration method |
| CN102435975A (en) * | 2011-11-07 | 2012-05-02 | 中国电力科学研究院 | Intelligent cost control electric energy meter and clock calibration method |
| CN102692616A (en) * | 2012-01-11 | 2012-09-26 | 华北电网有限公司计量中心 | Automatic test and collection device and method of smart meter |
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| "电能表测试要求和方法2011-03"，http://wenku.baidu.com/view/b10853d0360cba1aa811da7b.html;未知;《百度文库》;20120130;第94-96页 * |
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