CN222653096U - An independent calibration device for calibrating a cable tester - Google Patents
An independent calibration device for calibrating a cable tester Download PDFInfo
- Publication number
- CN222653096U CN222653096U CN202420617910.3U CN202420617910U CN222653096U CN 222653096 U CN222653096 U CN 222653096U CN 202420617910 U CN202420617910 U CN 202420617910U CN 222653096 U CN222653096 U CN 222653096U
- Authority
- CN
- China
- Prior art keywords
- connector
- terminals
- traces
- cable tester
- circuit board
- 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
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
本实用新型公开了一种用于校正电缆测试仪的独立校正装置，包括一电路板，其包括多条第一迹线和多条第二迹线；安装在电路板上的多个标准电阻器、多条导线、一第一连接器和一第二连接器；第一连接器和第二连接器先后与电缆测试仪的多个测试接口相对接；第一连接器具有连接电路板的多个第一端子，每个标准电阻器通过第一迹线电性连接其中两个相关联的第一端子；第二连接器具有连接第二迹线的多个第二端子，每条导线通过第二迹线电性连接其中两个相关联的第二端子；第一端子的数量等于第二端子的数量，标准电阻器的数量等于导线的数量。独立校正装置同时对接多个测试接口所对应的多个测试通道进行校正，极大地提升效率。
The utility model discloses an independent calibration device for calibrating a cable tester, comprising a circuit board, which comprises a plurality of first traces and a plurality of second traces; a plurality of standard resistors, a plurality of wires, a first connector and a second connector mounted on the circuit board; the first connector and the second connector are successively connected to a plurality of test interfaces of the cable tester; the first connector has a plurality of first terminals connected to the circuit board, and each standard resistor is electrically connected to two associated first terminals through a first trace; the second connector has a plurality of second terminals connected to the second trace, and each wire is electrically connected to two associated second terminals through a second trace; the number of first terminals is equal to the number of second terminals, and the number of standard resistors is equal to the number of wires. The independent calibration device simultaneously docks a plurality of test channels corresponding to a plurality of test interfaces for calibration, greatly improving efficiency.
Description
[ Field of technology ]
The present utility model relates to an independent calibration device for calibrating a cable tester, and more particularly, to an external multi-channel independent calibration device for calibrating a cable tester.
[ Background Art ]
After the cable is produced or purchased, the performance parameters of the cable are often required to be tested, but cable testers special for testing the electrical performance of the cable are also available on the market, and only the two ends of the cable to be tested are connected to the test ports of the cable testers, so that the cable testers can automatically test the cable to be tested according to a preset test scheme and output corresponding test results.
To ensure that the measurement results are valid, calibration of the cable tester is required before the cable tester is used. The high-end cable tester is often built-in and integrated with a correction circuit, but the correction circuit is expensive, and because the correction circuit is built-in, the correction circuit can only be maintained by depending on equipment suppliers, and the maintenance cost is high. The cable tester without the built-in integrated correction circuit needs to use the external correction equipment for correction, however, the test port of the correction equipment is generally internally provided with a plurality of test terminals corresponding to a plurality of test channels, so that a plurality of cables can be conveniently tested at the same time, and the correction of each test channel one by one is very complicated and has low efficiency.
[ utility model ]
Against the background, the utility model provides an independent correction device for correcting a cable tester, which is independent of the cable tester to be corrected, and is butted with a plurality of test channels of the cable tester to be corrected when in use, and simultaneously corrects the plurality of test channels.
In order to achieve the above purpose, the utility model adopts the following technical means:
An independent correction device for correcting a cable tester comprises a circuit board, a plurality of standard resistors, a plurality of wires, a first connector and a second connector, wherein the circuit board comprises a plurality of first traces and a plurality of second traces, the standard resistors, the wires, the first connector and the second connector are installed on the circuit board and are sequentially butted with a plurality of test interfaces of the cable tester, the first connector is provided with a plurality of first terminals connected with the circuit board, each standard resistor is electrically connected with two of the associated first terminals through the first traces, the second connector is provided with a plurality of second terminals connected with a plurality of second traces, each wire is electrically connected with two of the associated second terminals through the second traces, the number of the first terminals is equal to the number of the second terminals, and the number of standard resistors is equal to the number of the wires.
Further, the circuit board is further provided with two third traces, two fourth traces, two first connecting holes and two second connecting holes, wherein the two first connecting holes are electrically connected to the two first terminals with the voltage difference equal to the test voltage of the cable tester through the two third traces, and the two second connecting holes are electrically connected to the two second terminals with the voltage difference equal to the test voltage of the cable tester through the two fourth traces.
Further, the first connector, the plurality of standard resistors, and the first trace are all disposed in a first region of the circuit board, the second connector, the plurality of wires, and the second trace are all disposed in a second region of the circuit board, and the first region and the second region are electrically isolated.
Further, all circuits in the first region are symmetrically arranged with respect to all circuits in the second region except for the standard resistor and the wire.
Further, the lengths and the widths of the first trace and the second trace corresponding to the same test channel of the cable tester are equal.
A self-contained calibration device for calibrating a cable tester comprises a circuit board, a plurality of standard electronic components, a plurality of wires, a first connector and a second connector, wherein the standard electronic components, the wires, the first connector and the second connector are mounted on the circuit board and are provided with known fixed tested values, the first connector and the second connector are sequentially butted with a plurality of test interfaces of the cable tester, the first connector is provided with a plurality of first terminals connected with the circuit board, each standard electronic component is electrically connected with two associated first terminals through the first wires, the second connector is provided with a plurality of second terminals connected with a plurality of second wires, each wire is electrically connected with two associated second terminals through the second wires, the number of the first terminals is equal to the number of the second terminals, and the number of standard electronic components is equal to the number of wires.
Further, the circuit board is further provided with two third traces, two fourth traces, two first connecting holes and two second connecting holes, wherein the two first connecting holes are electrically connected to the two first terminals with the voltage difference equal to the test voltage of the cable tester through the two third traces, and the two second connecting holes are electrically connected to the two second terminals with the voltage difference equal to the test voltage of the cable tester through the two fourth traces.
Further, the first connector, the plurality of standard electronic components, and the first trace are all disposed within a first area of the circuit board, the second connector, the plurality of wires, and the second trace are all disposed within a second area of the circuit board, and the first area and the second area are electrically isolated.
Further, all circuits in the first region are symmetrically arranged with respect to all circuits in the second region except for the standard electronic component and the wires.
Further, the lengths and the widths of the first trace and the second trace corresponding to the same test channel of the cable tester are equal.
The technical means has the following technical effects that the independent correction device simultaneously corrects the plurality of test channels corresponding to the plurality of test interfaces without correcting each test channel one by one, thereby greatly improving the efficiency. The independent correction device is externally used relative to the cable tester, a user can independently maintain the independent correction device, each independent correction device can be simultaneously applied to a plurality of cable testers with the same model, and the manufacturing cost and the maintenance cost are obviously reduced. The lead is used for zero point correction, namely the independent correction device has a zero point correction function.
[ Description of the drawings ]
FIG. 1 is a schematic diagram of an independent correction device of the present utility model;
FIG. 2 is a schematic diagram of the independent calibration device and the calibrated cable tester of FIG. 1.
Reference numerals illustrate:
| independent correction device 1 | Circuit board 11 | First trace 111 |
| Second trace 112 | Third trace 113 | Fourth trace 114 |
| First contact hole 115 | Second contact hole 116 | Standard resistor 12 |
| Wire 13 | First connector 14 | First terminal 141 |
| Second connector 15 | Second terminal 151 | First area A |
| Second region B | Cable tester 2 | Test interface 21 |
[ Detailed description ] of the invention
For a better understanding of the utility model with objects, structures, features, and effects, the utility model will be described further with reference to the drawings and to the detailed description.
As shown in fig. 1 and 2, the independent calibration device 1 of the present utility model is used for calibrating a cable tester 2, and can be used for calibrating both a cable tester 2 without a built-in calibration circuit and a cable tester 2 integrated with a built-in calibration circuit. The corrected cable tester 2 comprises a test interface 21 arranged at the butt joint end of the cable tester 2 and a plurality of built-in test channels, wherein the test channels are test circuits for connecting the tested cable, and each test channel is communicated with the upper test interface 21 and the lower test interface 21 and is used for simultaneously connecting the two ends of the tested cable to form a complete closed-loop test circuit. Before the test, the cable tester 2 must be calibrated, the independent calibration device 1 is simultaneously connected to a plurality of test channels, and the original test function of the cable tester 2 is utilized to verify whether the test result of the cable tester 2 is accurate, if so, the cable tester 2 is normally used, and if not, the cable tester 2 is further maintained and calibrated.
As shown in fig. 1, the independent correction device 1 includes a circuit board 11, a plurality of standard resistors 12 mounted on the circuit board 11, a plurality of wires 13, a first connector 14, and a second connector 15. The first connector 14 and the second connector 15 are used for being in butt joint with the test interface 21 of the cable tester 2 in sequence.
As shown in fig. 1, the first connector 14 is spaced apart from the standard resistor 12 and electrically connected thereto, the second connector 15 is spaced apart from the conductive wire 13 and electrically isolated from the standard resistor 12 and the conductive wire 13. The circuit board 11 includes a first area a and a second area B that are electrically isolated, and in this embodiment, the first area a and the second area B are defined by a center line C of the circuit board 11, but the present utility model is not limited thereto. The first connector 14 and the plurality of standard resistors 12 are located in the first area a, and the second connector 15 and the plurality of wires 13 are located in the second area B. The circuit board 11 has a plurality of first traces 111 in the first region a and a plurality of second traces 112 in the second region B, and the first traces 111 and the second traces 112 are formed inside the circuit board 11 by a conventional copper layer etching process and electrically connected with pads (not numbered) and plated through holes (not numbered) in the respective regions.
As shown in fig. 1 and 2, in the present embodiment, two pins of each standard resistor 12 are soldered on a pad on the surface of the first area a, so as to be electrically connected to the first trace 111. Each of the standard resistors 12 has a known fixed resistance value. The first connector 14 has a plurality of first terminals 141, one end of the first terminals 141 is used for connecting with the test interface 21, and the other end is inserted into the plated through hole of the first area a, and is electrically connected with the first trace 111 by soldering or crimping. In other embodiments, a metal pad may be used instead of the plated through hole, and the first terminal 141 may be soldered or press-connected to the surface of the metal pad, so as to be electrically connected to the first trace 111. The plurality of first terminals 141 need to interface with the plurality of test interfaces 21 one by one, so the number of first terminals 141 is equal to the number of test interfaces 21. Each of the first terminals 141 is electrically connected to one of the first traces 111, so that the number of the first terminals 141 is equal to the number of the first traces 111. And each of the standard resistors 12 is electrically connected to two of the first traces 111, the number of the first terminals 141 is equal to twice that of the standard resistors 12. The two first terminals 141 electrically connected to each standard resistor 12 correspond to the two test interfaces 21 of the same test channel. Parameters such as the resistance value of each standard resistor 12 depend on requirements such as the measuring range and accuracy of the corresponding test channel, and the test channels with different measuring ranges correspond to the standard resistors 12 with different resistance values, so that the resistance values of the plurality of standard resistors 12 are not identical.
As shown in fig. 1 and 2, the wire 13 is used as a resistor having a zero resistance value. Both ends of each wire 13 are soldered to the pads on the surface of the second area B, so as to be electrically connected to the second trace 112. The second connector 15 has a plurality of second terminals 151, one end of the second terminals 151 is used for connecting with the test interface 21, and the other end is inserted into the plated through hole of the second area B, and is electrically connected with the second trace 112 by soldering or crimping. In other embodiments, a metal pad may be used instead of the plated through hole, and the second terminal 151 may be soldered or press-connected to the surface of the metal pad, so as to be electrically connected to the second trace 112. The plurality of second terminals 151 need to interface with the plurality of test interfaces 21 one by one, so the number of second terminals 151 is equal to the number of test interfaces 21. Each of the second terminals 151 is electrically connected to one of the second traces 112, so that the number of the second terminals 151 is equal to the number of the second traces 112. And each of the wires 13 is electrically connected to two of the second traces 112, the number of the second terminals 151 is equal to twice that of the wires 13. The two second terminals 151 electrically connected to each of the wires 13 correspond to the two test interfaces 21 of the same test channel.
The method for using the independent calibration device 1 is simply described, in which the second connector 15 is firstly docked with the test interface 21, so that each test channel, the two corresponding second terminals 151, the two second traces 112 and one of the wires 13 form a complete closed-loop test circuit, and then the self-contained resistance measurement function of the cable tester 2 is used to perform zero calibration on a plurality of test channels. If the measured resistance value is equal to zero, the zero point of the resistance value measuring range of the cable tester 2 is accurate, and the next measurement can be performed, and if the measured resistance value is not equal to zero, the zero point of the resistance value measuring range of the cable tester 2 is inaccurate, and correction maintenance is required. After the zero point calibration is completed, the first connector 14 is in butt joint with the test interface 21, so that each test channel, the two corresponding first terminals 141, the two first traces 111 and one standard resistor 12 form a complete closed-loop test circuit, and then the self-contained resistance value measurement function of the cable tester 2 is used to perform measurement calibration on a plurality of test channels. If the measured resistance value of each test channel is equal to the resistance value of the corresponding connected standard resistor 12, the measured resistance of the cable tester 2 is accurate, the measured result is reliable, and the subsequent actual measurement can be performed, and if the measured resistance value of some test channels is not equal to the resistance value of the corresponding connected standard resistor 12, the measured resistance of the cable tester 2 is inaccurate, and correction maintenance is required.
In this embodiment, the lengths and widths of the first trace 111 and the second trace 112 corresponding to the same test channel are substantially equal (generally equal within the range of manufacturing errors), so that the resistances of the first trace 111 and the second trace 112 are as equal as possible, and the influence of the resistance values of the first trace 111 and the second trace 112 on the correction result in the two corrections is eliminated. Except for the standard resistor 12 and the wire 13, all circuits of the first region a (including the first terminal 141 and the first trace 111) and all circuits of the second region B (including the second terminal 151 and the second trace 112) are symmetrically disposed with respect to the center (midpoint of the center line C) of the circuit board 11 so that the respective parameters of the first region a and the second region B are identical in the front-rear correction as much as possible.
It is apparent that in the present embodiment, since the first area a is provided with the standard resistor 12, the independent correction device 1 is mainly used for verifying the resistance value measuring function of the cable tester 2. In other embodiments, the standard resistor 12 may be replaced with other standard electronic components of known values according to different calibration projects, for example, to calibrate the inductance measurement function, the standard resistor 12 may be replaced with a standard inductor.
As shown in fig. 1 and 2, the first area a further has two third traces 113 and two first vias 115. The two first connection holes 115 are electrically connected to the two first terminals 141 having a voltage difference equal to the test voltage of the cable tester 2 through the two third traces 113, so that the voltage difference between the two first connection holes 115 is equal to the real-time test voltage of the cable tester 2, and a user can check whether the real-time test voltage of the cable tester 2 is equal to the rated test voltage thereof by connecting another multimeter or voltmeter to the two first connection holes 115. The second region B also has two fourth traces 114 and two second vias 116. The two second connection holes 116 are electrically connected to the two second terminals 151 with a voltage difference equal to the test voltage of the cable tester 2 through the two fourth traces 114, so that the voltage difference between the two second connection holes 116 is equal to the real-time test voltage of the cable tester 2, and a user can check whether the real-time test voltage of the cable tester 2 is equal to the rated test voltage by connecting another multimeter or voltmeter to the two second connection holes 116.
The independent correction device 1 for the cable tester 2 has the following beneficial effects:
(1) The independent correction device 1 is simultaneously connected with a plurality of test interfaces 21 in a butt joint mode, and corrects a plurality of test channels simultaneously, so that correction of each test channel one by one is not needed, and the efficiency is greatly improved. The independent correction device 1 is externally arranged relative to the cable tester 2, so that a user can independently maintain the independent correction device 1, each independent correction device 1 can be simultaneously applied to a plurality of cable testers 2 with the same model, and the manufacturing cost and the maintenance cost are obviously reduced. The wire 13 is used for zero point correction, i.e. the independent correction device 1 has a zero point correction function.
(2) The lengths of the first trace 111 and the second trace 112 corresponding to the same test channel are equal, so that the resistances of the first trace 111 and the second trace 112 are equal as much as possible, and the influence of the resistance values of the first trace 111 and the second trace 112 on the correction result in the two previous and subsequent corrections is eliminated.
(3) The first area a and the second area B are arranged symmetrically with respect to the center of the circuit board 11 except for the standard resistor 12 and the wire 13 so that the respective parameters of the first area a and the second area B are identical in the front-back correction twice as much as possible.
(4) The two first connection holes 115 are electrically connected to the two first terminals 141 having a voltage difference equal to the test voltage of the cable tester 2 through the two third traces 113, and the two second connection holes 116 are electrically connected to the two second terminals 151 having a voltage difference equal to the test voltage of the cable tester 2 through the two fourth traces 114, so that the independent correction device 1 has a test voltage correction function.
The above detailed description is merely illustrative of the preferred embodiments of the present utility model and is not intended to limit the scope of the utility model, therefore, all technical equivalents which may be employed in the present specification and illustrations are included in the scope of the utility model.
Claims (10)
1. An independent calibration device for calibrating a cable tester, comprising:
The circuit board comprises a plurality of first traces and a plurality of second traces, a plurality of standard resistors, a plurality of wires, a first connector and a second connector, wherein the standard resistors, the plurality of wires, the first connector and the second connector are mounted on the circuit board and are sequentially butted with a plurality of test interfaces of the cable tester, the first connector is provided with a plurality of first terminals connected with the circuit board, each standard resistor is electrically connected with two associated first terminals through the first traces, the second connector is provided with a plurality of second terminals connected with a plurality of second traces, each wire is electrically connected with two associated second terminals through the second traces, the number of the first terminals is equal to the number of the second terminals, and the number of the standard resistors is equal to the number of the wires.
2. The device of claim 1, wherein the circuit board further comprises two third traces, two fourth traces, two first vias and two second vias, the two first vias electrically connected to the two first terminals having a voltage difference equal to the test voltage of the cable tester through the two third traces, and the two second vias electrically connected to the two second terminals having a voltage difference equal to the test voltage of the cable tester through the two fourth traces.
3. The device of claim 1, wherein the first connector is spaced apart from the standard resistor and electrically connected thereto, the second connector is spaced apart from the lead and electrically isolated therefrom.
4. The individual calibration device for calibrating a cable tester according to claim 1, wherein said first connector, said plurality of standard resistors and said first trace are all disposed within a first area of said circuit board, said second connector, said plurality of wires and said second trace are all disposed within a second area of said circuit board, except for said standard resistors and said wires, all circuits within said first area being symmetrically disposed with all circuits within said second area.
5. The self-contained calibration device for calibrating a cable tester according to claim 1, wherein: the lengths and the widths of the first trace and the second trace corresponding to the same test channel of the cable tester are equal.
6. An independent calibration device for calibrating a cable tester, comprising:
A circuit board comprises a plurality of first traces and a plurality of second traces, a plurality of standard electronic components with known fixed measured values, a plurality of wires, a first connector and a second connector, wherein the first connector and the second connector are sequentially butted with a plurality of test interfaces of the cable tester, the first connector is provided with a plurality of first terminals connected with the circuit board, each standard electronic component is electrically connected with two associated first terminals through the first traces, the second connector is provided with a plurality of second terminals connected with a plurality of second traces, each wire is electrically connected with two associated second terminals through the second traces, the number of first terminals is equal to the number of second terminals, and the number of standard electronic components is equal to the number of wires.
7. The device of claim 6, wherein the circuit board further comprises two third traces, two fourth traces, two first vias and two second vias, the two first vias electrically connected to the two first terminals having a voltage difference equal to the test voltage of the cable tester through the two third traces, and the two second vias electrically connected to the two second terminals having a voltage difference equal to the test voltage of the cable tester through the two fourth traces.
8. The device of claim 6, wherein the first connector is spaced apart from the standard electronic component but electrically connected thereto, and the second connector is spaced apart from the lead but electrically connected thereto, and the standard electronic component is spaced apart from the lead and electrically isolated therefrom.
9. The self-contained calibration device for calibrating a cable tester according to claim 6, wherein said first connector, said plurality of standard electronic components and said first trace are all disposed within a first area of said circuit board, and said second connector, said plurality of wires and said second trace are all disposed within a second area of said circuit board, except for said standard electronic components and said wires, wherein all circuits within said first area are symmetrically disposed with all circuits within said second area.
10. The self-contained calibration device for calibrating a cable tester according to claim 6, wherein: the lengths and the widths of the first trace and the second trace corresponding to the same test channel of the cable tester are equal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202420617910.3U CN222653096U (en) | 2024-03-27 | 2024-03-27 | An independent calibration device for calibrating a cable tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202420617910.3U CN222653096U (en) | 2024-03-27 | 2024-03-27 | An independent calibration device for calibrating a cable tester |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN222653096U true CN222653096U (en) | 2025-03-21 |
Family
ID=95009967
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202420617910.3U Active CN222653096U (en) | 2024-03-27 | 2024-03-27 | An independent calibration device for calibrating a cable tester |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN222653096U (en) |
-
2024
- 2024-03-27 CN CN202420617910.3U patent/CN222653096U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6417682B1 (en) | Semiconductor device testing apparatus and its calibration method | |
| US9140734B2 (en) | Measuring apparatus and measuring method | |
| US20080169825A1 (en) | Solid Electrolytic Capacitor Inspection Device and Inspection Method | |
| CN112230128A (en) | Device and method for testing high-frequency performance of laser chip and storage medium | |
| CN104749542B (en) | Calibration and operation method of detection system | |
| CN112213617A (en) | IC chip electromagnetic compatibility testing method, device and readable storage medium | |
| CN222653096U (en) | An independent calibration device for calibrating a cable tester | |
| CN112731241B (en) | Calibration tool and calibration method for wafer test machine | |
| CN101009268A (en) | Substrate and its electrical measurement method | |
| US10613116B2 (en) | Kelvin connection with positional accuracy | |
| CN116449064B (en) | Shunt, electric equipment and energy storage equipment thereof | |
| US6876935B2 (en) | Method for correcting measurement error, method of determining quality of electronic component, and device for measuring characteristic of electronic component | |
| US9581676B2 (en) | Method of calibrating and debugging testing system | |
| JPH03296672A (en) | Inspecting method of printed circuit board having through hole | |
| CN116325104A (en) | Semiconductor test apparatus and semiconductor test method | |
| US7212016B2 (en) | Apparatus and methods for measuring resistance of conductive layers | |
| CN112285628A (en) | High-reliability large-current direct current ammeter and calibration method thereof | |
| TWI282431B (en) | Test jig for daisy chain test board | |
| CN219715663U (en) | High-precision detection device of LED grain tester | |
| CN116540048B (en) | Semiconductor test method and test structure | |
| CN213843326U (en) | Clamp for testing small-package multi-pin electronic component by matching LCR meter | |
| CN113777471A (en) | Method for calibrating relative voltage offset error of measurement module | |
| JPH06174786A (en) | Burn-in board | |
| JPH01297563A (en) | Method and device for measuring through-hole resistance of printed circuit boards | |
| CN118191710A (en) | Switching device and method for calibrating integrated circuit test system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |