CN2921853Y - Improved grounding electric resistance meter detecting device - Google Patents
Improved grounding electric resistance meter detecting device Download PDFInfo
- Publication number
- CN2921853Y CN2921853Y CN 200620122072 CN200620122072U CN2921853Y CN 2921853 Y CN2921853 Y CN 2921853Y CN 200620122072 CN200620122072 CN 200620122072 CN 200620122072 U CN200620122072 U CN 200620122072U CN 2921853 Y CN2921853 Y CN 2921853Y
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- resistance
- measuring
- electric resistance
- grounding electric
- improvement
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- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Abstract
An improved grounding electric resistance meter detecting device, relating to instruments and meters, is an improvement of the previous JD-1 grounding electric resistance detecting device against the background of the fact that the previous JD-1 grounding electric resistance detecting device has been stopped using for failing to meet the new state measurement detection regulation due to low precision level, narrow measurement range and no 1000 Ohm auxiliary grounding electric resistance. The utility model is characterized in that: a shell is conducted with dustproof and waterproof improvement, the components on and under a board are rearranged orderly, the standard resistors inside the device are surrounded into a circle after grouping according to shift adjustment and are fixed under the board to be corresponding to an adjusting knob, new increase of 10<3> Ohm and 10<-3> Ohm measurement disks, improvement of wiring method of auxiliary grounding electric resistance, changing the scales to 0 Ohm, 500 Ohm, 1 kOhm, 2 kOhm and 5 kOhm and enhancing the level of R standard of each standard resistance for resistance f to 0.01 percent. Full adoption of parts with non-inductance and low temperature coefficients enables the overall improvement totally complying with the requirements of ''Measurement Detection Regulation JJG 366-2004 Grounding Electric Resistance Meter''.
Description
Technical field
The utility model relates to instrument and meter, particularly relates to a kind of calibrating device of earth resistance meter.
Background technology
Earth resistance meter is the electrical instrument of various grounding resistance of transmission of a kind of direct measurement and soil resistivity, for analog digital earth resistance meter, because of the big young pathbreaker of the error of indication directly influences the accuracy of grounding resistance, must regularly carry out the error calibrating to earth resistance meter.But the JD-1 type stake resistance calibrating installation before new order is assigned, accuracy class is low, measurement range is narrow because of existing (does not have * 10
3With * 10
-3Measuring disk), auxiliary earth resistance is not had the problems such as gear of 1000 Ω, can not satisfy the requirement of " JJG 366-2004 national metrological verification regulations ", be stopped use, and at present still none new calibrating installation come out.
The utility model content
The utility model improves the JD-1 type stake resistance calibrating installation that has been deactivated, and its basic purpose just is to plug a gap into adapting to GB " JJG 366-2004 " vertification regulation requirement, is expected to become a new standard transfer device.
Concrete improvement of the present utility model is as follows:
(1) widens its measurement range, increase * 10
3With * 10
-3Measuring disk makes the spread of measuring resistance enlarge 100 times;
(2) improve measuring accuracy and reliability, the grade of measuring resistance is brought up to 0.01%, all select for use noninductive and resistance low-temperature coefficient;
(3) with 500 original Ω+1.5k Ω+3k Ω series-mode frame, be improved to the parallel structure of 0 Ω, 500 Ω, 1k Ω, 2k Ω, 5k Ω, the measurement range of simulation auxiliary resistance is widened, make that also the error of each measuring resistance is not disturbed mutually when measuring, and then improved the accuracy of measuring;
(4) profile of modifying device, the inside of compact apparatus, what make it to become is light, attractive in appearance, and other has increased waterproof and dustproof function, and its general structure includes shell, panel, adjusting knob and corresponding measuring resistance group;
(5) connection of the circuit after the improvement is provided by Fig. 3, from small to large, and by * 10
-3To * 10
310 multiple magnitude conversion, its accuracy of measurement is 0.01%.
The utility model can satisfy the requirement of State Administration for Quality Supervision and Inspection and Quarantine to standard set-up fully.
Description of drawings
Fig. 1 is contour structures signal of the present utility model;
Fig. 2 is the panel signal;
Fig. 3 connects signal for the general assembly circuit.
Among the figure, 1 is housing, 2 is cap, and 3 is adjusting knob, and 4 is panel, 5 is measuring resistance, E is the terminal of analogue ground resistance (calibration resistor), and P is a simulation auxiliary earth resistance current potential terminal, and C is a simulation auxiliary earth resistor current terminal, R is the connection terminal when being used as resistance box, and R is designated as measuring resistance.
Embodiment
The utility model is that its concrete improvement is implemented as follows to the improvement of improving and adapt to the rules requirement at the preceding JD-1 type stake resistance calibrating installation that has been deactivated:
(1) improvement of apparatus structure: contrast Fig. 1 and Fig. 2, housing 1 of the present utility model still is a rectangle, other has increased a cap 2, make by high-intensity polymeric material, dosed O-ring seal at cover port, the deflation that each measuring resistance group 5 in will installing during general assembly is arranged is neat, press stepping and regulate marshalling, be fixed on panel 4 below, totally 8 of its adjusting knobs 3, six buttons are wherein arranged: * 1000 Ω, * 100 Ω, * 10 Ω, * 1 Ω, the adjusting shift of * 0.1 Ω and * 0.001 Ω is from 0,1～10, the range of adjustment that 1 * 0.01 Ω button is arranged is from 1～11, their stepping change point all is 11, in addition, also having a conversion scale is 0 Ω, 500 Ω, 1k Ω, the auxiliary earth resistance conversion button of 2k Ω and 5k Ω, 8 adjusting knobs are put in order, create an aesthetic feeling, each following measuring resistance R tag splice line is short prompt compact, form a circle, the global shape miniaturization of the housing 1 that makes, on panel, also have 5 electrode contact: R in addition, E, P, C and ground contact, R wherein is the connection terminal when being used as resistance box, E is the terminal of analogue ground resistance (calibration resistor), P is a simulation auxiliary earth resistance current potential terminal, and C is a simulation auxiliary earth resistor current terminal.Described device has increased over cap 2, can prevent dust, again can water-tight, and also be that former calibrating installation is unexistent; Panel 4 adopts the smooth generous plastic film bakelite plate that adds.So whole device is easy to carry, dustproof and waterproof is merrily and lightheartedly attractive in appearance.
(2) range ability is widened: increased * 10
3With * 10
-3Measuring disk makes the spread of measuring resistance by 0.01 original Ω～1111.11 Ω, enlarges 100 times, and expansion is 0.001～11111.111 Ω.
(3) improved measuring accuracy and reliability: the grade of each measuring resistance R that will organize into groups brings up to 0.01%, all selects for use noninductive and device low-temperature coefficient, and the minimum temperature coefficient reaches 5 * 10
-b/ ℃; Guaranteed that the insulation resistance between measuring junction and the shell is not less than 20M Ω under the 500V high pressure, and can bear the test that power frequency simple alternating current 500V lasts 1min, the power of each step resistance device has been brought up to 0.25W.
(4) with original 500 Ω that have the mutual interference phenomenon of error, 1.5k Ω, 3k Ω series-mode frame, make it to constitute the simulation auxiliary criteria resistance value of 500 Ω, 2k Ω and 5K Ω, be improved to the parallel structure of 0 Ω, 500 Ω, 1k Ω, 2k Ω, 5k Ω, make it both to have increased by the 1000 Ω shelves that satisfy the rules requirement, also make simultaneously between each measuring resistance error independently of one another, do not interfere with each other, improved measuring reliability, meet the new order requirement;
(5) total improvement, be to carry out according to the requirement of " the measurement verification regulations JJG 366-2004 of People's Republic of China (PRC) earth resistance meter " fully, calibration method also meets the rules requirement, so, earth resistance meter calibrating installation after the improvement can be used as replacement standard transfer device and uses.
Claims (4)
1, a kind of modified earth resistance meter calibrating installation, by housing, adjusting knob, panel, measuring resistance and improvement circuit constitute, it is characterized in that: housing is a rectangle, other has increased a cap, cover and add the water-tight circle, each measuring resistance R mark in the device is pressed stepping and is regulated marshalling, following and the adjusting knob that is fixed on panel is corresponding, there are 8 adjusting knobs to be used for measuring on the panel, wherein * 1000 Ω, * 100 Ω, * 10 Ω, * 1 Ω, * 0.1 Ω and * 0.001 Ω knob, its change point is from 0,1～10, and * the adjusting change point of 0.01 Ω knob is from 1～11, also having a conversion scale is 0 Ω, 500 Ω, 1k Ω, the auxiliary earth resistance conversion button of 2k Ω and 5k Ω, pairing each the measuring resistance R mark of each knob all by the circuit connection after the improvement, is organized into groups in total measurement range and is installed under the panel, short prompt compact, form a circle, on panel, also have 5 electrode contact: R in addition, E, P, C and ground contact are connected with the marshalling of measuring resistance R target.
2, modified earth resistance meter calibrating installation according to claim 1 is characterized in that: described each measuring resistance R target accuracy class is 0.01%, all selects for use noninductive and device low-temperature coefficient.
3, modified earth resistance meter calibrating installation according to claim 1 is characterized in that: increased in the measurement range * 10
3With * 10
-3Measuring disk, and increased by 1000 Ω measuring resistances at auxiliary earth resistance measurement dish.
4, modified earth resistance meter calibrating installation according to claim 1, it is characterized in that: the auxiliary earth resistance of 0 Ω, 500 Ω, 1k Ω, 2k Ω and 5k Ω is parallel structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620122072 CN2921853Y (en) | 2006-07-03 | 2006-07-03 | Improved grounding electric resistance meter detecting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620122072 CN2921853Y (en) | 2006-07-03 | 2006-07-03 | Improved grounding electric resistance meter detecting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2921853Y true CN2921853Y (en) | 2007-07-11 |
Family
ID=38254333
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620122072 Expired - Fee Related CN2921853Y (en) | 2006-07-03 | 2006-07-03 | Improved grounding electric resistance meter detecting device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2921853Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102879755A (en) * | 2012-09-20 | 2013-01-16 | 保定供电公司 | Testing instrument for acting performance of insulation monitoring device |
| CN103500521A (en) * | 2013-09-29 | 2014-01-08 | 广州供电局有限公司 | Visual simulation testing method for ground resistance of electric equipment |
| CN103513210A (en) * | 2013-10-11 | 2014-01-15 | 内蒙古自治区计量测试研究院 | Inductance, capacitance and resistance standard device |
| CN104714166A (en) * | 2013-12-13 | 2015-06-17 | 北汽福田汽车股份有限公司 | System and method for testing multiple resistor analog acquisition passages in device |
| CN105785303A (en) * | 2016-04-19 | 2016-07-20 | 国家电网公司 | Grounding ohmmeter calibrating device |
-
2006
- 2006-07-03 CN CN 200620122072 patent/CN2921853Y/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102879755A (en) * | 2012-09-20 | 2013-01-16 | 保定供电公司 | Testing instrument for acting performance of insulation monitoring device |
| CN103500521A (en) * | 2013-09-29 | 2014-01-08 | 广州供电局有限公司 | Visual simulation testing method for ground resistance of electric equipment |
| CN103500521B (en) * | 2013-09-29 | 2015-09-16 | 广州供电局有限公司 | The stake resistance visual simulation test method of electrical equipment |
| CN103513210A (en) * | 2013-10-11 | 2014-01-15 | 内蒙古自治区计量测试研究院 | Inductance, capacitance and resistance standard device |
| CN104714166A (en) * | 2013-12-13 | 2015-06-17 | 北汽福田汽车股份有限公司 | System and method for testing multiple resistor analog acquisition passages in device |
| CN104714166B (en) * | 2013-12-13 | 2017-10-13 | 北汽福田汽车股份有限公司 | To the system and method for multiple resistor-type analog acquisition path testings in equipment |
| CN105785303A (en) * | 2016-04-19 | 2016-07-20 | 国家电网公司 | Grounding ohmmeter calibrating device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070711 |