CN204330848U - A kind of walkie high-current converter - Google Patents
A kind of walkie high-current converter Download PDFInfo
- Publication number
- CN204330848U CN204330848U CN201420752823.5U CN201420752823U CN204330848U CN 204330848 U CN204330848 U CN 204330848U CN 201420752823 U CN201420752823 U CN 201420752823U CN 204330848 U CN204330848 U CN 204330848U
- Authority
- CN
- China
- Prior art keywords
- current
- shell
- dispel
- heat
- wire ohm
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Measurement Of Current Or Voltage (AREA)
Abstract
The utility model discloses a kind of walkie high-current converter, comprise shell 1 and the four-wire ohm 2 that can dispel the heat, wherein, it is inner that the four-wire ohm 2 that can dispel the heat is positioned at shell 1, and radiating surface and the heat radiator 3 of the four-wire ohm 2 that can dispel the heat fit; The outer one end of shell 1 is provided with two voltage link posts that directly can coordinate with digital multimeter, 4, two voltage link posts 4 and is connected with two voltage ends of the four-wire ohm 2 that can dispel the heat respectively in shell 1 inside; The outer other end of shell 1 is provided with two electric current binding post 5, two electric current binding posts 5 being used for inputting big current to be converted and is directly connected with two current terminals of the four-wire ohm 2 that can dispel the heat respectively in the inside of shell 1.This converter directly can be inserted into the voltage end of digital multimeter, measure larger ac and dc current very easily, solve the problem that digital multimeter ac and dc current range is smaller, owing to solving the problem that resistance heating causes resistance to change, can carry out the current measurement of long period, this converter can also connect other parameters of oscillograph measuring current waveform.
Description
Technical field
The utility model belongs to electric detecting technology field, relates to a kind of walkie high-current converter.
Technical background
Digital multimeter ac and dc current range is generally smaller, as KEITHLEY2000, Agilent34401A are 3A to the maximum, because clamp on amperemeter technical indicator is very poor, when needing in product testing on-the-spot test to measure larger DC current, general consideration uses shunt and voltage table, the limits of error are generally about ± 2%, when measuring larger alternating current, general consideration uses power supply, Hall current sensor and reometer, build comparatively loaded down with trivial details, and the test macro limits of error of composition are not high yet.But it is very expensive that existing import current clamp can measure larger current price, and the limits of error are not high yet.
In view of the foregoing, studied, utilize the method that current-voltage is changed by test to larger ac and dc current method of testing, use the small resistor of energy super-high-current, larger ac and dc current can be converted to the portable converter of combined-voltage by development.The development of this converter can realize the measurement of larger ac and dc current very easily.This converter directly can be inserted into the voltage end of digital multimeter, can measure larger ac and dc current very easily, can connect other parameters of oscillograph measuring current waveform simultaneously, can Some substitute with expensive import current clamp.This converter measurement range: ac and dc current (3 ~ 30) A, the limits of error: be not more than ± 0.5%.
Technical scheme
A kind of walkie high-current converter, it is characterized in that, comprise shell (1) and the four-wire ohm (2) that can dispel the heat, wherein, it is inner that the four-wire ohm (2) that can dispel the heat is positioned at shell (1), and radiating surface and the heat radiator (3) of the four-wire ohm (2) that can dispel the heat fit; Shell (1) outer one end is provided with two voltage link posts (4) that directly can coordinate with digital multimeter, and two voltage link posts (4) are connected with two voltage ends of the four-wire ohm (2) that can dispel the heat respectively in shell (1) inside; Shell (1) the outer other end is provided with the electric current binding post (5) that two are used for inputting big current to be converted, and two electric current binding posts (5) are directly connected with two current terminals of the four-wire ohm (2) that can dispel the heat respectively in the inside of shell (1).
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention, and wherein, 1 is shell, and 2 is the four-wire ohms that can dispel the heat, and 3 is heat radiator, and 4 is voltage link posts, and 5 is electric current binding posts.
Beneficial effect
This converter directly can be inserted into the voltage end of digital multimeter, measure larger ac and dc current very easily, solve the problem that digital multimeter ac and dc current range is smaller, owing to solving the problem that resistance heating causes resistance to change, can carry out the current measurement of long period, this converter can also connect other parameters of oscillograph measuring current waveform.
Embodiment
A kind of walkie high-current converter, it is characterized in that, comprise shell (1) and the four-wire ohm (2) that can dispel the heat, wherein, it is inner that the four-wire ohm (2) that can dispel the heat is positioned at shell (1), and radiating surface and the heat radiator (3) of the four-wire ohm (2) that can dispel the heat fit; Shell (1) outer one end is provided with two voltage link posts (4) that directly can coordinate with digital multimeter, and two voltage link posts (4) are connected with two voltage ends of the four-wire ohm (2) that can dispel the heat respectively in shell (1) inside; Shell (1) the outer other end is provided with the electric current binding post (5) that two are used for inputting big current to be converted, and two electric current binding posts (5) are directly connected with two current terminals of the four-wire ohm (2) that can dispel the heat respectively in the inside of shell (1).
Under concrete condition, need to measure more than the electric current of 3A if having, but digital multimeter ac and dc current range is generally smaller, as KEITHLEY2000, Agilent34401A are 3A to the maximum, cannot realize with traditional digital multimeter, adopt converter of the present invention, metering system is as follows:
1, current return is accessed two electric current binding posts (5);
2, two voltage link posts (4) are directly inserted the voltage measurement end of digital multimeter;
3, magnitude of voltage U is read;
4, current value is calculated.
Claims (1)
1. a walkie high-current converter, it is characterized in that, comprise shell (1) and the four-wire ohm (2) that can dispel the heat, wherein, it is inner that the four-wire ohm (2) that can dispel the heat is positioned at shell (1), and radiating surface and the heat radiator (3) of the four-wire ohm (2) that can dispel the heat fit; Shell (1) outer one end is provided with two voltage link posts (4) that directly can coordinate with digital multimeter, and two voltage link posts (4) are connected with two voltage ends of the four-wire ohm (2) that can dispel the heat respectively in shell (1) inside; Shell (1) the outer other end is provided with the electric current binding post (5) that two are used for inputting big current to be converted, and two electric current binding posts (5) are directly connected with two current terminals of the four-wire ohm (2) that can dispel the heat respectively in the inside of shell (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420752823.5U CN204330848U (en) | 2014-12-03 | 2014-12-03 | A kind of walkie high-current converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420752823.5U CN204330848U (en) | 2014-12-03 | 2014-12-03 | A kind of walkie high-current converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204330848U true CN204330848U (en) | 2015-05-13 |
Family
ID=53167195
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420752823.5U Active CN204330848U (en) | 2014-12-03 | 2014-12-03 | A kind of walkie high-current converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204330848U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109716145A (en) * | 2016-09-20 | 2019-05-03 | Koa株式会社 | Current measuring device |
-
2014
- 2014-12-03 CN CN201420752823.5U patent/CN204330848U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109716145A (en) * | 2016-09-20 | 2019-05-03 | Koa株式会社 | Current measuring device |
| CN109716145B (en) * | 2016-09-20 | 2021-07-23 | Koa株式会社 | Current measuring device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104569904A (en) | Test device for testing direct current and even harmonic influence quantity of electric energy meter | |
| CN204330848U (en) | A kind of walkie high-current converter | |
| CN109406840A (en) | Adjustable handcart circuit breaker loop resistance measurement auxiliary tool | |
| CN203672961U (en) | Broadband 0-200Hz current detection circuit | |
| CN204228946U (en) | A kind of electric energy meter error calibrating installation | |
| CN202025041U (en) | Live testing rod of high voltage switch contact resistor | |
| CN201615920U (en) | Alternating current milliammeter | |
| CN201837690U (en) | Debugging instrument of reactive compensation device | |
| CN205353347U (en) | On --spot calibration equipment of portable single -phase electric energy meter | |
| CN204314369U (en) | There is the test pencil of voltage digital detection and temperature acquisition function | |
| CN203561676U (en) | Leakage current tester | |
| CN202676806U (en) | Resistance measure apparatus with equal voltage method | |
| CN207396706U (en) | A kind of 10kV and more than current transformer rapid testing apparatus | |
| CN102608407A (en) | Device for detecting stabilizing voltage value of voltage stabilizing diode | |
| CN203069683U (en) | Online transformer transformation ratio testing device | |
| CN202013381U (en) | Partial pressure resistor measuring unit | |
| CN205958638U (en) | Distribution lines's zero sequence current measuring device | |
| CN201497768U (en) | Device for measuring phase current of angle joint winding | |
| CN202994886U (en) | Hall current measurement tool device | |
| CN201845072U (en) | Portable wide-range detection device for voltage-regulating value of voltage-regulator tube | |
| CN204515019U (en) | The temperature resistance curve obtaining means of substation transformer winding | |
| CN204214970U (en) | The automatic test device of high-efficiency and precision Switching Power Supply sensor assembly | |
| CN103852624A (en) | Hand-held convertor transformer core grounding current tester | |
| CN202383193U (en) | Hook table capable of carrying out multi-point measurement | |
| CN103344933A (en) | Gear verifying device of universal meter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |