CN204631237U - A kind of measurement detection system of digital earth resistance tester - Google Patents
A kind of measurement detection system of digital earth resistance tester Download PDFInfo
- Publication number
- CN204631237U CN204631237U CN201520168164.5U CN201520168164U CN204631237U CN 204631237 U CN204631237 U CN 204631237U CN 201520168164 U CN201520168164 U CN 201520168164U CN 204631237 U CN204631237 U CN 204631237U
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- China
- Prior art keywords
- resistance
- digital earth
- resistance tester
- earth resistance
- tester
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Abstract
The utility model relates to a kind of measurement detection system of digital earth resistance tester, in order to carry out metering verification to digital earth resistance tester, comprises test board and is arranged on digital earth resistance tester, the standard resistance box R on test board
x, measuring resistance R and multimeter S, the earth terminal E of described digital earth resistance tester, standard resistance box R
x, measuring resistance R and digital earth resistance tester current terminal C connect, the voltage end P of digital earth resistance tester is connected to measuring resistance R and standard resistance box R
xbetween, described multimeter S is connected in parallel on the two ends of measuring resistance R.Compared with prior art, the utility model has the advantages such as detection is accurate, measurement range is wide, measurement parameter is many, powerful.
Description
Technical field
The utility model relates to a kind of measurement detection system, especially relates to a kind of measurement detection system of digital earth resistance tester.
Background technology
Along with the setting of a large amount of building, the installation of various outdoor equipment, lightning protection and safety ground more aobvious important, the test of stake resistance adopts the mode of four-wire system, needs to squeeze into auxiliary electrode mode in certain distance and measures, complicated during test.The development of electronic technology, that measuring technique has had development, the digital earth resistance tester of current employing annular test mode starts to be widely used, my company needs to set up digital earth resistance tester measuring apparatus, at present according to the behaviour in service of telecommunications company, adopt the instrument of a new generation greatly, carry out and need to re-establish a gauge check platform to the gauge check of this type of instrument.
Utility model content
The purpose of this utility model be exactly provide a kind of to overcome defect that above-mentioned prior art exists and detect accurately, the measurement detection system of measurement range is wide, measurement parameter is many, powerful digital earth resistance tester.
The purpose of this utility model can be achieved through the following technical solutions:
A measurement detection system for digital earth resistance tester, in order to carry out metering verification to digital earth resistance tester, comprises test board and is arranged on digital earth resistance tester, the standard resistance box R on test board
x, measuring resistance R and multimeter S, the earth terminal E of described digital earth resistance tester, standard resistance box R
x, measuring resistance R and digital earth resistance tester current terminal C connect, the voltage end P of digital earth resistance tester is connected to measuring resistance R and standard resistance box R
xbetween, described multimeter S is connected in parallel on the two ends of measuring resistance R.
Described standard resistance box R
xstandard resistance range be 0.01-9999 Ω.
The resistance of described measuring resistance R is 1 Ω, 10 Ω, 100 Ω and 500 Ω.
The gear of described multimeter S comprises current gear, voltage gear, resistance grade and resistivity shelves.
Described digital earth resistance tester inside is provided with low frequency constant current source and AC amplifier, and described low frequency constant current source is connected with current terminal C, and described AC amplifier is connected with voltage end P.
Compared with prior art, the utility model has the following advantages:
One, detect accurately: the utility model adopts the resistance of high-precision standard resistance in order to test, and testing result precision is high.
Two, measurement range is wide: the range of adjustment of resistance box is greater than the measurement range of digital earth resistance tester, can meet the requirement of various test.
Three, measurement parameter is many, powerful: the utility model can not only verify resistance measurement, can also carry out preliminary test to voltage and resistivity.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in detail.
Embodiment:
As shown in Figure 1, a kind of measurement detection system of digital earth resistance tester, in order to carry out metering verification to digital earth resistance tester, it is characterized in that, comprise test board and be arranged on digital earth resistance tester, the standard resistance box R on test board
x, measuring resistance R and multimeter S, the earth terminal E of described digital earth resistance tester, standard resistance box R
x, measuring resistance R and digital earth resistance tester current terminal C connect, the voltage end P of digital earth resistance tester is connected to measuring resistance R and standard resistance box R
xbetween, described multimeter S is connected in parallel on the two ends of measuring resistance R.
Standard resistance box R
xstandard resistance range be 0.01-9999 Ω, the resistance of measuring resistance R is 1 Ω, 10 Ω, 100 Ω and 500 Ω, the gear of multimeter S comprises current gear, voltage gear, resistance grade and resistivity shelves, digital earth resistance tester inside is provided with low frequency constant current source and AC amplifier, described low frequency constant current source is connected with current terminal C, and described AC amplifier is connected with voltage end P.
Measuring principle is the low frequency constant current from low frequency constant current source in machine, direct current being become interchange, loop is formed through current terminal C and earth terminal E, measured object measuring resistance R produces and exchanges pressure drop, send into AC amplifier through auxiliary voltage end P and amplify, then send into gauge outfit display through detection.
During detection, measuring resistance is set to respectively 1 Ω, 10 Ω and 100 Ω, 3 kinds of ranges of corresponding digital earth resistance tester, open digital earth resistance tester and carry out resistance measurement, adjustment criteria resistance box R respectively
xresistance make its Measurement sensibility, multimeter is got to voltage gear and read the resistance of measuring resistance and the resistance shown in digital earth resistance tester and compare, complete survey is also calibrated.
Claims (5)
1. a measurement detection system for digital earth resistance tester, in order to carry out metering verification to digital earth resistance tester, is characterized in that, comprise test board and be arranged on digital earth resistance tester, the standard resistance box R on test board
x, measuring resistance R and multimeter S, the earth terminal E of described digital earth resistance tester, standard resistance box R
x, measuring resistance R and digital earth resistance tester current terminal C connect, the voltage end P of digital earth resistance tester is connected to measuring resistance R and standard resistance box R
xbetween, described multimeter S is connected in parallel on the two ends of measuring resistance R.
2. the measurement detection system of a kind of digital earth resistance tester according to claim 1, is characterized in that, described standard resistance box R
xstandard resistance range be 0.01-9999 Ω.
3. the measurement detection system of a kind of digital earth resistance tester according to claim 1, is characterized in that, the resistance of described measuring resistance R is 1 Ω, 10 Ω, 100 Ω and 500 Ω.
4. the measurement detection system of a kind of digital earth resistance tester according to claim 1, is characterized in that, the gear of described multimeter S comprises current gear, voltage gear, resistance grade and resistivity shelves.
5. the measurement detection system of a kind of digital earth resistance tester according to claim 1, it is characterized in that, described digital earth resistance tester inside is provided with low frequency constant current source and AC amplifier, described low frequency constant current source is connected with current terminal C, and described AC amplifier is connected with voltage end P.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520168164.5U CN204631237U (en) | 2015-03-24 | 2015-03-24 | A kind of measurement detection system of digital earth resistance tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520168164.5U CN204631237U (en) | 2015-03-24 | 2015-03-24 | A kind of measurement detection system of digital earth resistance tester |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204631237U true CN204631237U (en) | 2015-09-09 |
Family
ID=54050254
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520168164.5U Expired - Fee Related CN204631237U (en) | 2015-03-24 | 2015-03-24 | A kind of measurement detection system of digital earth resistance tester |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204631237U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108710096A (en) * | 2018-08-22 | 2018-10-26 | 深圳德晋科技有限公司 | Earth-continuity tester calibrating installation |
-
2015
- 2015-03-24 CN CN201520168164.5U patent/CN204631237U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108710096A (en) * | 2018-08-22 | 2018-10-26 | 深圳德晋科技有限公司 | Earth-continuity tester calibrating installation |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150909 Termination date: 20190324 |