CN101122634B - Leakage current tester accuracy validation device - Google Patents
Leakage current tester accuracy validation device Download PDFInfo
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- CN101122634B CN101122634B CN2006102007941A CN200610200794A CN101122634B CN 101122634 B CN101122634 B CN 101122634B CN 2006102007941 A CN2006102007941 A CN 2006102007941A CN 200610200794 A CN200610200794 A CN 200610200794A CN 101122634 B CN101122634 B CN 101122634B
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- leakage current
- power pin
- current tester
- spdt
- throw switch
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Abstract
An accuracy testing device for leakage current measuring device is used to test the accuracy of leakage current measuring device, including a shell as well as an earth power plug, a fire wire power plug and a zero-line power plug arranged on the shell. The shell is provided with a variable resistor inside, one end of the variable resistor is connected with the earth power plug and the other end is electrically connected with the fire wire power plug or one of the zero-line power plugs. The accuracy testing device for leakage current measuring device can conveniently and rapidly test whether the accuracy of the leakage current measuring device is good or not.
Description
Technical field
The present invention relates to a kind of accuracy validation device, particularly a kind of demo plant that is used to verify leakage current tester accuracy.
Background technology
At present, in use all can there be leakage current in most of electronic product to a certain extent, if these leakage currents will cause damage to human body when reaching certain value.For this reason, before electronic product dispatches from the factory, must carry out the test of leakage current,, typically use leakage current tester at the leakage current in the electronic product and test to satisfy relevant safety standard standard to it.
But, when leakage current tester long or other reasons service time, its test accuracy does not just reach code requirement, normally sends it back to manufacturer place or the monitoring department that is correlated with after leakage current tester uses a period of time and carries out verification, and then reuse.Though this mode is feasible, leakage current tester probably before verification its test accuracy just do not reach code requirement, so may cause some tested electronic products not reach relevant safety standard standard.
Summary of the invention
In view of above content, be necessary to provide a kind of demo plant that can verify leakage current tester accuracy easily and efficiently.
A kind of leakage current tester accuracy validation device, be used to verify the accuracy of leakage current tester, it comprises a housing, described housing is provided with a ground wire power pin, a live wire power pin and a zero line power pin, be provided with a variohm in the described housing, one end of described variohm is connected in described ground wire power pin, and the other end of described variohm selectively is electrically connected one of described live wire power pin or described zero line power pin.
After described leakage current tester accuracy validation device is connected to leakage current tester to be measured, by adjusting to described variohm, make the equivalent resistance of an electronic equipment of described leakage current tester accuracy validation device simulation becoming, the associated safety codes and standards of described electronic equipment are compared with the numerical value on the described leakage current tester, whether the accuracy that can be easy to judge described leakage current tester is good, very convenient, fast.
Description of drawings
The present invention is further illustrated in conjunction with embodiment below with reference to accompanying drawing.
Fig. 1 is the synoptic diagram of the better embodiment of leakage current tester accuracy validation device of the present invention.
Fig. 2 is the circuit diagram of Fig. 1 leakage current tester accuracy validation device.
Fig. 3 is the circuit diagram of another better embodiment of leakage current tester accuracy validation device of the present invention.
Embodiment
Please common reference Fig. 1 and Fig. 2, leakage current tester accuracy validation device 10 of the present invention is used to verify the accuracy of leakage current tester, its better embodiment comprises a housing 12, described housing 12 is provided with a ground wire power pin 14, live wire power pin 16, a zero line power pin 18 and a single-pole double-throw switch (SPDT) 19, and the inside of described housing 12 is provided with a variohm R.
Wherein, described ground wire power pin 14 links to each other by described variohm R with the cutter portion terminals of single-pole double-throw switch (SPDT) 19, a binding post of described single-pole double-throw switch (SPDT) 19 links to each other with described live wire power pin 16, and another binding post of described single-pole double-throw switch (SPDT) 19 links to each other with described zero line power pin 18.Described leakage current tester accuracy validation device 10 can be plugged in three utmost point supply sockets of described leakage current tester by described ground wire power pin 14, live wire power pin 16 and zero line power pin 18.
When using the accuracy of a leakage current tester (not shown) of described leakage current tester accuracy validation device 10 checkings, if electronic product to be measured is (as notebook computer, not shown) when in use input voltage is U (as 220V), can know that according to the associated safety standard of described electronic product the maximum leakage current value of its permission is A (as 100 μ A), then obtains the equivalent resistance U/A of a described electronic product when leakage current values is maximal value.Described leakage current tester accuracy validation device 10 is inserted in three utmost point supply sockets of described leakage current tester and opens the power switch of described leakage current tester, described single-pole double-throw switch (SPDT) 19 is transferred to the state that described ground wire power pin 14 links to each other with described live wire power pin 16, and regulate described variohm R and make its resistance value equal U/A, be the equivalent resistance of described leakage current tester accuracy validation device 10 when being modeled as described electronic equipment leakage current values being maximal value between ground wire and live wire, observe described leakage current tester display screen, if the current value that shows is in the Measurement Allowance of the described maximum leakage current values A that allows, then described leakage current tester live wire is to the test accuracy compliant requirement of the leakage current between the ground wire.Should use the same method, described single-pole double-throw switch (SPDT) 19 is transferred to the state that described ground wire power pin 14 links to each other with described zero line power pin 18, observe described leakage current tester display screen again, if the current value that shows is in the Measurement Allowance of described maximum leakage current value A, then described leakage current tester zero line is to the also compliant requirement of test accuracy of the leakage current between the ground wire.Otherwise, if the current value that shows on the described leakage current tester display screen outside the Measurement Allowance of described maximum leakage current value A, then the accuracy of described leakage current tester does not just reach requirement, needs verification again to use.
Fig. 3 is the circuit diagram of another better embodiment of leakage current tester accuracy validation device 10 of the present invention, circuit diagram with above-mentioned better embodiment is different is for they: it comprises two variohm R1, R2, wherein, described ground wire power pin 14 links to each other with the cutter portion terminals of single-pole double-throw switch (SPDT) 19, variohm R1 is connected between the binding post and described live wire power pin 16 of described single-pole double-throw switch (SPDT) 19, and another variohm R2 is connected between another binding post and described zero line power pin 18 of described single-pole double-throw switch (SPDT) 19.Concrete method of testing is similar to the situation that a variohm R is only arranged, and just repeats no more here.
Described leakage current tester accuracy validation device 10 can be regulated described variohm R according to different leakage current testers and different electronic products, accordingly to reach test request when using.
Claims (3)
1. leakage current tester accuracy validation device, be used to verify the accuracy of leakage current tester, it comprises a housing, described housing is provided with a ground wire power pin, a live wire power pin and a zero line power pin, be provided with a variohm in the described housing, one end of described variohm is connected in described ground wire power pin, the other end of described variohm selectively be electrically connected described live wire power pin or described zero line power pin it
2. leakage current tester accuracy validation device as claimed in claim 1, it is characterized in that: described leakage current tester accuracy validation device also comprises a single-pole double-throw switch (SPDT), the other end of described variohm is connected in the cutter portion terminals of described single-pole double-throw switch (SPDT), a binding post of described single-pole double-throw switch (SPDT) links to each other with described live wire power pin, another binding post of described single-pole double-throw switch (SPDT) links to each other with described zero line power pin, by switching described single-pole double-throw switch (SPDT) the other end of described variohm is linked to each other with one of described live wire power pin or described zero line power pin.
3. leakage current tester accuracy validation device, be used to verify the accuracy of leakage current tester, it comprises a housing, described housing is provided with a ground wire power pin, a live wire power pin, a zero line power pin and a single-pole double-throw switch (SPDT), be provided with one first variohm and a second adjustable resistance device in the described housing, described ground wire power pin links to each other with the cutter portion terminals of single-pole double-throw switch (SPDT), described first variohm is connected between the binding post and described live wire power pin of described single-pole double-throw switch (SPDT), and described the second adjustable resistance device is connected between another binding post and described zero line power pin of described single-pole double-throw switch (SPDT).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006102007941A CN101122634B (en) | 2006-08-11 | 2006-08-11 | Leakage current tester accuracy validation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006102007941A CN101122634B (en) | 2006-08-11 | 2006-08-11 | Leakage current tester accuracy validation device |
Publications (2)
| Publication Number | Publication Date |
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| CN101122634A CN101122634A (en) | 2008-02-13 |
| CN101122634B true CN101122634B (en) | 2011-01-26 |
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| CN2006102007941A Expired - Fee Related CN101122634B (en) | 2006-08-11 | 2006-08-11 | Leakage current tester accuracy validation device |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103389178B (en) * | 2012-05-09 | 2016-04-13 | 神讯电脑(昆山)有限公司 | Electric screwdriver torsion and earth leakage tester |
| CN112379320A (en) * | 2020-12-25 | 2021-02-19 | 河南省计量科学研究院 | Lightning protection element tester calibration method based on fixed voltage timing method |
| CN112526433A (en) * | 2020-12-25 | 2021-03-19 | 河南省计量科学研究院 | Lightning protection element tester calibration method based on timing voltage measurement method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6832173B1 (en) * | 2002-07-30 | 2004-12-14 | Altera Corporation | Testing circuit and method for phase-locked loop |
| CN2757146Y (en) * | 2004-06-11 | 2006-02-08 | 王卫东 | Portable remained current protector detector |
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2006
- 2006-08-11 CN CN2006102007941A patent/CN101122634B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6832173B1 (en) * | 2002-07-30 | 2004-12-14 | Altera Corporation | Testing circuit and method for phase-locked loop |
| CN2757146Y (en) * | 2004-06-11 | 2006-02-08 | 王卫东 | Portable remained current protector detector |
Non-Patent Citations (2)
| Title |
|---|
| 国家质量监督检验检疫总局.泄漏电流测试仪.《中华人民共和国国家计量检定规程》.2007,1-16. * |
| 宗晓宁.泄漏电流测量仪校准方法的探讨.《中国计量》.2001,(第3期),45. * |
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| CN101122634A (en) | 2008-02-13 |
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Granted publication date: 20110126 Termination date: 20130811 |