CN103134975B - Simple multi-channel current tester - Google Patents
Simple multi-channel current tester Download PDFInfo
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- CN103134975B CN103134975B CN201310041466.1A CN201310041466A CN103134975B CN 103134975 B CN103134975 B CN 103134975B CN 201310041466 A CN201310041466 A CN 201310041466A CN 103134975 B CN103134975 B CN 103134975B
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Abstract
The invention discloses a kind of Simple multi-channel current tester, comprise waver, timer and several reometers; Corresponding each reometer, be provided with a relay group, relay group comprises the first relay, the second relay and the 3rd relay; Waver can obtain electric work by control timer, and the coil of the waver coil and the second relay that can select control first relay obtains electric work; The coil of the first relay can make reometer and first line form path when obtaining electric work, reometer and the second circuit can be made when the coil of the second relay obtains electric work to form path.The present invention controls three reometers by waver simultaneously can meet the demand of simultaneously testing six road electric currents, in saving test board space, while avoiding operator's faulty operation to cause product to burn out, can improve the work efficiency of operator.<!--1-->
Description
Technical field
The present invention relates to a kind of current testing device, specifically relate to a kind of Simple multi-channel current tester, be applicable to the test of dynamic current during the lighting of production LED drive power, measure six road electric currents at most.
Background technology
The performance of LED product driving power is that the important foundation of LED product widespread use meets request for utilization in order to ensure the performance of LED product driving power, usually will carry out DC current test to the driving power of LED product.When carrying out DC test to LED product driving power, sometimes need to test six circuits of LED drive power simultaneously, and in prior art, the method of simultaneously testing six circuits is very complicated and efficiency is low, usually need the vertical multimeter of six independences for Taiwan to test every bar circuit in prior art, so just cause test table wiring various, and take local large, easily cause wiring error, cause product to burn out.In addition, when the multimeter simultaneously using six independences for Taiwan vertical carries out operation, operator will operate simultaneously check six instrument, easily produces operating mistake, causes operating efficiency to decline.
Summary of the invention
In order to solve the problems of the technologies described above, the present invention proposes a kind of Simple multi-channel current tester, can realize a reometer conversion testing two-way electric current, easy for operation, be not easy wrong line, when operator uses, only need be inserted into after on substrate by the connector of connection substrate and just can test; Three reometers simultaneously controlled by waver can meet the demand of simultaneously testing six road electric currents, in saving test board space, while avoiding operator's faulty operation to cause product to burn out, can improve the work efficiency of operator.
Technical scheme of the present invention is achieved in that
A kind of Simple multi-channel current tester, comprises waver, timer and several reometers; Corresponding each reometer, be provided with a relay group, described relay group comprises the first relay, the second relay and the 3rd relay; Described waver can control described timer and obtain electric work, and the coil of the described waver coil and described second relay that can select described first relay of a control obtains electric work; The coil that described timer can control described 3rd relay obtains electric work; Can reometer described in short circuit when the coil of described 3rd relay obtains electric work, and make the first line of electric current to be measured and the second circuit form path, the coil of described first relay can make described reometer and described first line form path when obtaining electric work, described reometer and described second circuit can be made when the coil of described second relay obtains electric work to form path.
As a further improvement on the present invention, described waver can control described timer and obtain electric work, and the structure that the coil of the described waver coil and described second relay that can select described first relay of a control obtains electric work is: be provided with direct supply, described waver is octal four gear switch, described octal is pin one, pin two, pin three, pin four, pin five, pin six, pin seven and pin eight, wherein, be connected with one end of the coil of described timer after pin one is connected with pin four, the other end of the coil of described timer is connected with the positive pole of described direct supply, be connected with one end of the coil of described first relay after pin six is connected with pin five, the other end of the coil of described first relay is connected with the positive pole of described direct supply, be connected with one end of the coil of described second relay after pin eight is connected with pin seven, the other end of the coil of described second relay is connected with the positive pole of described direct supply, when described waver is in one grade, pin one is connected with the negative pole of described direct supply with pin five simultaneously, when described waver is in second gear, pin two is connected with the negative pole of described direct supply with pin six simultaneously, when described waver is in third gear, pin three is connected with the negative pole of described direct supply with pin seven simultaneously, and when described waver is in fourth gear, pin four is connected with the negative pole of described direct supply with pin eight simultaneously.
As a further improvement on the present invention, the structure that the coil that described timer can control described 3rd relay obtains electric work is: described timer also comprises moving contact, normally closed contact and normally opened contact, the moving contact of described timer is connected with the negative pole of described direct supply, the normally closed contact of described timer is connected with one end of the coil of described 3rd relay, and the other end of the coil of described 3rd relay is connected with the positive pole of described direct supply.
As a further improvement on the present invention, can reometer described in short circuit when the coil of described 3rd relay obtains electric work, and make the first line of electric current to be measured and the second circuit form path, the coil of described first relay can make described reometer and described first line form path when obtaining electric work, the structure that described reometer and described second circuit can be made when the coil of described second relay obtains electric work to form path is: described first relay, the second relay and the 3rd relay comprise two moving contacts, two normally closed contacts and two normally opened contacts respectively;
A moving contact of described 3rd relay is connected with a moving contact of the first relay with one end of the cut-off point of described first line respectively, and another moving contact of described 3rd relay is connected with a moving contact of the second relay with one end of the cut-off point of described second circuit respectively; A normally opened contact of described 3rd relay is connected with another moving contact of described first relay with the other end of the cut-off point of described first line respectively, and another normally opened contact of described 3rd relay is connected with another moving contact of described second relay with the other end of the cut-off point of described second circuit respectively;
The positive pole of described reometer is connected with a normally opened contact of described second relay with a normally opened contact of described first relay respectively, and the negative pole of described reometer is connected with another normally opened contact of described second relay with another normally opened contact of described first relay respectively;
Two normally closed contacts of described first relay are connected to each other, and two normally closed contacts of described second relay are connected to each other.
As a further improvement on the present invention, be provided with two relay indicating lights, the coils from parallel connection of coils of one of them relay indicating light and described first relay, the coils from parallel connection of coils of another relay indicating light and described second relay.
As a further improvement on the present invention, three described reometers are provided with.
The invention has the beneficial effects as follows: the invention provides a kind of Simple multi-channel current tester, select control first relay by waver and the second relay obtains electric work, the function of a use reometer test two-way electric current can be realized; But, the first relay is controlled and the second relay obtains in electric transfer process at waver, namely the transfer process of the electric current of two circuits measured by reometer, electric current when must ensure to measure in two circuits can not disconnect, because, article one, the electricity that can increase rapidly in another circuit after circuit disconnection is high, causes the damage of test load lamp.Therefore, the present invention is provided with the 3rd relay, and control the timer that the 3rd relay obtains electric work, the gear of waver is coordinated to select, by the 3rd relay short circuit first relay and the second relay realize reometer converted measurement wherein one article of circuit time, another circuit does not disconnect.Preferably, be provided with three reometers, be respectively the first reometer, the second reometer, the 3rd reometer.The corresponding relay group of each reometer, each relay group comprises three relays, totally nine relays, are respectively the first relay, the second relay, the 3rd relay, the 4th relay, the 5th relay, the 6th relay, the 7th relay, the 8th relay, the 9th relay.Wherein, the connection of the 4th relay and the 7th relay is with above-mentioned first relay, and the connection of the 5th relay and the 8th relay is with above-mentioned second relay, and the connection of the 6th relay and the 9th relay is with above-mentioned 3rd relay.Like this, the coil that waver can control the first, the 4th and the 7th relay simultaneously obtains electric work; The coil that also simultaneously can control the second, the 5th and the 8th relay obtains electric work, namely can realize can be exchanged into the another three road electric currents of test by Control after three road electric currents tested by three reometers, and realizing between them while conversion work, ensure that the circuit of each electric current to be measured does not disconnect.The function of six road electric currents tested by the present invention's three reometers simultaneously, compares tradition and adopts the vertical multimeter of six independences for Taiwan to test the method for six road electric currents, can solve test table wiring numerous, takies local large, the problem that easy wrong causes product to burn out.Use the present invention's Simple multi-channel current tester, only need the connector of several connection substrate to be inserted into after on substrate and just can test, save space and will product be caused to burn out by wrong line.Meanwhile, during test, as long as the shelves of operator's adjustment waver, just can complete the test of six road line currents, when operator adjusts, mistake be less likely to occur, so also just relatively improve efficiency.
Accompanying drawing explanation
Fig. 1 is that Simple multi-channel current tester circuit working schematic diagram of the present invention is (the second reometer and the 4th, the 5th identical with the connection of the first reometer and first, second, and third relay with the connection of the 6th relay, 3rd reometer and the 7th, the 8th identical with the connection of the first reometer and first, second, and third relay with the connection of the 9th relay, omit the connection of above-mentioned two parts circuit.)
By reference to the accompanying drawings, make the following instructions:
BK---waver 1---pin one
2---pin 23---pin three
4---pin 45---pin five
6---pin 67---pin seven
8---pin eight TAM---timer
TAM1---coil TAM2 of timer---moving contact
TAM3---normally closed contact TAM4---normally opened contact
A1---first reometer A2---the second reometer
A3---the 3rd reometer J1---the first relay
J2---second relay J 3---the 3rd relay
J4---the 4th relay J 5---the 5th relay
J6---the 6th relay J 7---the 7th relay
J8---the 8th relay J 9---the 9th relay
J11---coil J21 of the first relay---coil of the second relay
J31---the coil of the 3rd relay
L1---first line L2---second circuit
L3---tertiary circuit L4---the 4th circuit
L5---the 5th circuit L6---the 6th circuit
DC---direct supply
J12, J22, J32---moving contact
J13, J23, J33---normally closed contact
J14, J24, J34---normally opened contact
D1, D2---relay indicating light
Embodiment
Below in conjunction with accompanying drawing to a preferred embodiment of the present invention will be described in detail.
As shown in Figure 1, a kind of Simple multi-channel current tester, comprises waver BK, a timer TAM and reometer; To should reometer, be provided with a relay group, described relay group comprises the first relay J 1, second relay J 2 and the 3rd relay J 3; Separately be provided with direct supply DC, described waver is octal four gear switch, described octal is pin 1, pin 22, pin 33, pin 44, pin 55, pin 66, pin 77 and pin 88, wherein, be connected with one end of the coil TAM1 of described timer after pin one is connected with pin four, the other end of the coil of described timer is connected with the positive pole of described direct supply; Be connected with one end of the coil of described first relay after pin six is connected with pin five, the other end of the coil of described first relay is connected with the positive pole of described direct supply; Be connected with one end of the coil of described second relay after pin eight is connected with pin seven, the other end of the coil of described second relay is connected with the positive pole of described direct supply; When described waver is in one grade, pin one is connected with the negative pole of described direct supply with pin five simultaneously, when described waver is in second gear, pin two is connected with the negative pole of described direct supply with pin six simultaneously, when described waver is in third gear, pin three is connected with the negative pole of described direct supply with pin seven simultaneously, and when described waver is in fourth gear, pin four is connected with the negative pole of described direct supply with pin eight simultaneously.Like this, described waver can control described timer and obtain electric work, and the coil J21 of the described waver coil J11 and described second relay that can select described first relay of a control obtains electric work;
Described timer also comprises moving contact TAM2, normally closed contact TAM3 and normally opened contact TAM4, the moving contact of described timer is connected with the negative pole of described direct supply, the normally closed contact of described timer is connected with one end of the coil of described 3rd relay, and the other end of the coil of described 3rd relay is connected with the positive pole of described direct supply.Like this, the coil J31 that described timer can control described 3rd relay obtains electric work;
Described first relay, the second relay and the 3rd relay comprise two moving contact J12, J22, J32, two normally closed contact J13, J23, J33 and two normally opened contact J14, J24, J34 respectively; A moving contact J32 of described 3rd relay is connected with a moving contact J12 of the first relay with one end of the cut-off point of first line L1 respectively, and another moving contact J32 of described 3rd relay is connected with a moving contact J22 of the second relay with one end of the cut-off point of the second circuit L2 respectively; A normally opened contact J34 of described 3rd relay is connected with another moving contact J12 of described first relay with the other end of the cut-off point of first line L1 respectively, and another normally opened contact J34 of described 3rd relay is connected with another moving contact J22 of described second relay with the other end of the cut-off point of the second circuit L2 respectively; The positive pole of described reometer is connected with a normally opened contact J24 of described second relay with a normally opened contact J14 of described first relay respectively, and the negative pole of described reometer is connected with another normally opened contact J24 of described second relay with another normally opened contact J14 of described first relay respectively; Two normally closed contact J13 of described first relay are connected to each other, and two normally closed contact J23 of described second relay are connected to each other.Like this, can reometer described in short circuit when the coil of described 3rd relay obtains electric work, and make the first line L1 of electric current to be measured and the second circuit L2 form path, the coil of described first relay can make described reometer and first line L1 form path when obtaining electric work, described reometer and the second circuit L2 can be made when the coil of described second relay obtains electric work to form path.
In sum, select control first relay by waver and the second relay obtains electric work, the function of a use reometer test two-way electric current can be realized; But, the first relay is controlled and the second relay obtains in electric transfer process at waver, namely the transfer process of the electric current of two circuits measured by reometer, electric current when must ensure to measure in two circuits can not disconnect, because, article one, the electricity that can increase rapidly in another circuit after circuit disconnection is high, causes the damage of test load lamp.Therefore, the present invention is provided with the 3rd relay, and control the timer that the 3rd relay obtains electric work, the gear of waver is coordinated to select, by the 3rd relay short circuit first relay and the second relay realize reometer converted measurement wherein one article of circuit time, another circuit does not disconnect.
Preferably, be separately provided with two relay indicating light D1, D2, the coils from parallel connection of coils of one of them relay indicating light D1 and described first relay, the coils from parallel connection of coils of another relay indicating light D2 and described second relay.Relay indicating light is used to indicate the duty that the first relay and the second relay are changed electric.
Preferably, be provided with three described reometers, be respectively the first reometer A1, the second reometer A2, the 3rd reometer A3.The corresponding relay group of each reometer, each relay group comprises three relays, totally nine relays, are respectively the first relay J 1, second relay J 2, the 3rd relay J 3, the 4th relay J 4, the 5th relay J 5, the 6th relay J 6, the 7th relay J 7, the 8th relay J 8, the 9th relay J 9.Wherein, the connection of the 4th relay and the 7th relay is with above-mentioned first relay, and the connection of the 5th relay and the 8th relay is with above-mentioned second relay, and the connection of the 6th relay and the 9th relay is with above-mentioned 3rd relay.Like this, the coil that waver can control the first, the 4th and the 7th relay simultaneously obtains electric work; The coil that also simultaneously can control the second, the 5th and the 8th relay obtains electric work, namely can realize can be exchanged into the another three road electric currents of test by Control after three road electric currents tested by three reometers, and realizing between them while conversion work, ensure that the circuit of each electric current to be measured does not disconnect.
Test six line currents for three reometers below, the principle of operation of Simple multi-channel current tester of the present invention be described:
Three reometers are respectively the first reometer A1, the second reometer A2, the 3rd reometer A3.Article six, circuit is respectively first line L1, the second circuit L2, tertiary circuit L3, the 4th circuit L4, the 5th circuit L5, the 6th circuit L6, the corresponding relay group of each reometer, each relay group comprises three relays, totally nine relays, are respectively the first relay J 1, second relay J 2, the 3rd relay J 3, the 4th relay J 4, the 5th relay J 5, the 6th relay J 6, the 7th relay J 7, the 8th relay J 8, the 9th relay J 9.First reometer corresponding first relay J 1, second relay J 2, the 3rd relay J 3, corresponding 4th relay J 4 of second reometer, the 5th relay J 5, the 6th relay J the 6, three reometer corresponding 7th relay J 7, the 8th relay J 8, the 9th relay J 9.
First, waver is placed in one grade, now, pin one and pin five are connected with DC power cathode, because pin five is connected with coil one end of the 7th relay with the first relay, the 4th relay, therefore, after pin five connects direct supply respectively, make the coil of the first relay, the 4th relay and the 7th relay obtain electric work, drive the normally opened contact of the first relay, the 4th relay and the 7th relay and moving contact to connect.First reometer, by the first relay access first line, shows the loop current of first line; Second reometer, by the 4th relay access tertiary circuit, shows the loop current of tertiary circuit; 3rd reometer, by the 7th relay access the 5th circuit, shows the loop current of the 5th circuit.Due to pin one be connected with pin four after be connected with one end of the coil of timer, therefore, after pin one connects direct supply, the coil of timer is made to obtain electric work, the normally opened contact of driving timing device and moving contact are connected, make the coil losing electricity of the 3rd relay, the 6th relay and the 9th relay, namely the 3rd relay, the 6th relay and the 9th relay are not in the state of short circuit first line, tertiary circuit and the 5th circuit.Meanwhile, normally closed contact and the moving contact of the second relay, the 5th relay and the 8th relay are connected, and make the second circuit, the 4th circuit and the 6th circuit be in channel status.
Then, waver is placed in second gear, now, pin two and pin six are connected with DC power cathode, due to pin six be connected with pin five after be connected with one end of the coil of the first relay, the 4th relay, the 7th relay, therefore, the coil of the first relay, the 4th relay and the 7th relay continues to keep obtaining electric duty.But pin two is neutral gear, make the coil losing electricity of timer, the moving contact of timer restores, the moving contact of timer and normally closed contact are connected, thus make the coil of the 3rd relay, the 6th relay and the 9th relay obtain electric work, and drive that its two moving contact and two normally opened contacts are closed to be connected, thus by the first reometer, the second reometer and the 3rd reometer short circuit, and make first line, tertiary circuit and the 5th circuit formation path.Although namely the coil of the first relay, the 4th relay and the 7th relay is in obtain electric duty, the first reometer, the second reometer and the 3rd reometer do not show the current value of first line, tertiary circuit and the 5th circuit.Meanwhile, normally closed contact and the moving contact of the second relay, the 5th relay and the 8th relay are connected, and make the second circuit, the 4th circuit and the 6th circuit still be in channel status.
Then, waver is placed in third gear, now, pin three and pin seven are connected with DC power cathode, because pin seven is connected with one end of the coil of the 8th relay with the second relay, the 5th relay, therefore, after pin seven connects direct supply, make the coil of the second relay, the 5th relay and the 8th relay obtain electric work, drive the normally opened contact of the second relay, the 5th relay and the 8th relay and moving contact to connect.But pin three is neutral gear, make the coil losing electricity of timer, the moving contact of timer is still in reset condition, the moving contact of timer and normally closed contact are connected, thus make the coil of the 3rd relay, the 6th relay and the 9th relay obtain electric work, and drive that its two moving contact and two normally opened contacts are closed to be connected, thus by the first reometer, the second reometer and the 3rd reometer short circuit, and make the second circuit, the 4th circuit and the 6th circuit formation path.Although namely the coil of the second relay, the 5th relay and the 8th relay is in obtain electric duty, the first reometer, the second reometer and the 3rd reometer do not show the current value of the second circuit, the 4th circuit and the 6th circuit.Meanwhile, normally closed contact and the moving contact of the first relay, the 4th relay and the 7th relay are connected, and make first line, tertiary circuit and the 5th circuit be in channel status.
Finally, waver is placed in fourth gear, now, pin four and pin eight are connected with DC power cathode, due to pin eight connect with pin seven after be connected with one end of the coil of the 8th relay with the second relay, the 5th relay, therefore, after pin eight connects direct supply, make the coil of the second relay, the 5th relay and the 8th relay obtain electric work, drive the normally opened contact of the second relay, the 5th relay and the 8th relay and moving contact to connect.First reometer accesses the second circuit by the second relay, shows the loop current of the second circuit; Second reometer, by the 5th relay access the 4th circuit, shows the loop current of the 4th circuit; 3rd reometer, by the 8th relay access the 6th circuit, shows the loop current of the 6th circuit.Because pin four one end with the coil of timer is connected, therefore, after pin four connects direct supply, the coil of timer is made to obtain electric work, the normally opened contact of driving timing device and moving contact are connected, make the coil losing electricity of the 3rd relay, the 6th relay and the 9th relay, namely the 3rd relay, the 6th relay and the 9th relay are not in the state of short circuit second circuit, the 4th circuit and the 6th circuit.Meanwhile, normally closed contact and the moving contact of the first relay, the 4th relay and the 7th relay are connected, and make first line, tertiary circuit and the 5th circuit be in channel status.
To sum up, the present invention can realize the function that six road electric currents tested by three reometers simultaneously, comparing tradition adopts the vertical multimeter of six independences for Taiwan to test the method for six road electric currents, the simple and easy duplex tester of the present invention is used to test six road electric currents, solve test table wiring numerous, take local large, the problem that easy wrong causes product to burn out.Use the present invention's Simple multi-channel current tester, only need the connector of several connection substrate to be inserted into after on substrate and just can test, save space and will product be caused to burn out by wrong line.Meanwhile, use the simple and easy duplex tester of the present invention to test six road electric currents, as long as the shelves of operator's adjustment waver, just can complete the test of six road line currents, when operator adjusts, mistake be less likely to occur, so also just relatively improve efficiency.
Above embodiment is with reference to accompanying drawing, to a preferred embodiment of the present invention will be described in detail.Those skilled in the art by carrying out amendment on various forms or change to above-described embodiment, but when not deviating from essence of the present invention, drops within protection scope of the present invention.
Claims (6)
1. a Simple multi-channel current tester, is characterized in that: comprise waver (BK), timer (TAM) and several reometers; Corresponding each reometer, be provided with a relay group, described relay group comprises the first relay (J1), the second relay (J2) and the 3rd relay (J3); Described waver can control described timer and obtain electric work, and described waver can select the coil (J21) of the coil (J11) of described first relay of a control and described second relay electric work; The coil (J31) that described timer can control described 3rd relay obtains electric work; Can reometer described in short circuit when the coil of described 3rd relay obtains electric work, and make the first line of electric current to be measured (L1) and the second circuit (L2) form path, the coil of described first relay can make described reometer and described first line form path when obtaining electric work, described reometer and described second circuit can be made when the coil of described second relay obtains electric work to form path.
2. Simple multi-channel current tester according to claim 1, it is characterized in that: described waver can control described timer and obtain electric work, and the structure that the coil of the described waver coil and described second relay that can select described first relay of a control obtains electric work is: be provided with direct supply (DC), described waver is octal four gear switch, described octal is pin one (1), pin two (2), pin three (3), pin four (4), pin five (5), pin six (6), pin seven (7) and pin eight (8), wherein, be connected with one end of the coil (TAM1) of described timer after pin one is connected with pin four, the other end of the coil of described timer is connected with the positive pole of described direct supply, be connected with one end of the coil of described first relay after pin six is connected with pin five, the other end of the coil of described first relay is connected with the positive pole of described direct supply, be connected with one end of the coil of described second relay after pin eight is connected with pin seven, the other end of the coil of described second relay is connected with the positive pole of described direct supply, when described waver is in one grade, pin one is connected with the negative pole of described direct supply with pin five simultaneously, when described waver is in second gear, pin two is connected with the negative pole of described direct supply with pin six simultaneously, when described waver is in third gear, pin three is connected with the negative pole of described direct supply with pin seven simultaneously, and when described waver is in fourth gear, pin four is connected with the negative pole of described direct supply with pin eight simultaneously.
3. Simple multi-channel current tester according to claim 2, it is characterized in that: the structure that the coil that described timer can control described 3rd relay obtains electric work is: described timer also comprises moving contact (TAM2), normally closed contact (TAM3) and normally opened contact (TAM4), the moving contact of described timer is connected with the negative pole of described direct supply, the normally closed contact of described timer is connected with one end of the coil of described 3rd relay, and the other end of the coil of described 3rd relay is connected with the positive pole of described direct supply.
4. Simple multi-channel current tester according to claim 1, it is characterized in that: can reometer described in short circuit when the coil of described 3rd relay obtains electric work, and make the first line of electric current to be measured and the second circuit form path, the coil of described first relay can make described reometer and described first line form path when obtaining electric work, the coil of described second relay can make described reometer and described second circuit form path structure when obtaining electric work is: described first relay, second relay and the 3rd relay comprise two moving contact (J12 respectively, J22, J32), two normally closed contact (J13, J23, J33) and two normally opened contact (J14, J24, J34),
A moving contact of described 3rd relay is connected with a moving contact of the first relay with one end of the cut-off point of described first line respectively, and another moving contact of described 3rd relay is connected with a moving contact of the second relay with one end of the cut-off point of described second circuit respectively; A normally opened contact of described 3rd relay is connected with another moving contact of described first relay with the other end of the cut-off point of described first line respectively, and another normally opened contact of described 3rd relay is connected with another moving contact of described second relay with the other end of the cut-off point of described second circuit respectively;
The positive pole of described reometer is connected with a normally opened contact of described second relay with a normally opened contact of described first relay respectively, and the negative pole of described reometer is connected with another normally opened contact of described second relay with another normally opened contact of described first relay respectively;
Two normally closed contacts of described first relay are connected to each other, and two normally closed contacts of described second relay are connected to each other.
5. Simple multi-channel current tester according to claim 1, it is characterized in that: be provided with two relay indicating lights (D1, D2), the coils from parallel connection of coils of one of them relay indicating light and described first relay, the coils from parallel connection of coils of another relay indicating light and described second relay.
6. the Simple multi-channel current tester according to any one of claim 1 to 5, is characterized in that: be provided with three described reometers.
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| CN201310041466.1A CN103134975B (en) | 2013-02-04 | 2013-02-04 | Simple multi-channel current tester |
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| CN201310041466.1A CN103134975B (en) | 2013-02-04 | 2013-02-04 | Simple multi-channel current tester |
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| CN103134975B true CN103134975B (en) | 2016-03-30 |
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| CN108107397B (en) * | 2017-12-15 | 2020-10-27 | 广东雅达电子股份有限公司 | Automatic detection device and method for direct current meter |
| CN111856384A (en) * | 2020-07-06 | 2020-10-30 | 高新兴物联科技有限公司 | Power supply control equipment and method |
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| CN201489039U (en) * | 2009-08-26 | 2010-05-26 | 清华大学 | Multichannel lightning current measuring device |
| CN203178340U (en) * | 2013-02-04 | 2013-09-04 | 昆山尼赛拉电子器材有限公司 | Simple multipath current tester |
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2013
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| CN201344948Y (en) * | 2008-12-31 | 2009-11-11 | 比亚迪股份有限公司 | Test instrument |
| CN201449411U (en) * | 2009-07-02 | 2010-05-05 | 苏州经贸职业技术学院 | Multichannel current sampling circuit |
| CN201489039U (en) * | 2009-08-26 | 2010-05-26 | 清华大学 | Multichannel lightning current measuring device |
| CN203178340U (en) * | 2013-02-04 | 2013-09-04 | 昆山尼赛拉电子器材有限公司 | Simple multipath current tester |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN103134975A (en) | 2013-06-05 |
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