CN103134975A - Simple multi-channel current tester - Google Patents
Simple multi-channel current tester Download PDFInfo
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- CN103134975A CN103134975A CN2013100414661A CN201310041466A CN103134975A CN 103134975 A CN103134975 A CN 103134975A CN 2013100414661 A CN2013100414661 A CN 2013100414661A CN 201310041466 A CN201310041466 A CN 201310041466A CN 103134975 A CN103134975 A CN 103134975A
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Abstract
The invention discloses a simple multi-channel current tester which comprises a band switch, a timer and a plurality of ampere meters. A relay unit is arranged corresponding to each ampere meter. The relay unit comprises a first relay, a second relay and a third relay. The band switch is capable of controlling the electricity obtaining work of the timer and is capable of controlling the electricity obtaining work of either of the coil of the first relay or the coil of the second relay. When the coil of the first relay obtains electricity and works, the ampere meter and a first line are enabled to form access. When the coil of the second relay obtains electricity and works, the ampere meter and a second line are enabled to form access. According to the simple multi-channel current tester, the band switch simultaneously controls three ampere meters to meet a requirement of simultaneously testing current of six lines, test board space is saved, burnout of a product caused by a mistake of an operator is avoided, and meanwhile, work efficiency of the operator is improved.
Description
Technical field
The present invention relates to a kind of current testing device, specifically relate to a kind of simple and easy multichannel current tester, when being applicable to produce the LED driving power and lighting a lamp, the test of dynamic current, measure at most six road electric currents.
Background technology
The performance of LED product driving power is that the important foundation of LED product widespread use satisfies request for utilization in order to ensure the performance of LED product driving power, usually will carry out to the driving power of LED product the DC current test.When LED product driving power is carried out DC test, sometimes need six circuits of LED driving power are tested simultaneously, and in prior art, the method that six circuits are tested simultaneously is very complicated and efficient is low, usually need the vertical multimeter of six independences for Taiwan that every circuit is tested in prior art, so just cause the test table wiring various, and take local large, easily cause wiring error, cause product to burn out.In addition, when using simultaneously the vertical multimeter of six independences for Taiwan to carry out operation, the operator will operate simultaneously and check six instrument, easily produces operating mistake, causes operating efficiency to descend.
Summary of the invention
In order to solve the problems of the technologies described above, the present invention proposes a kind of simple and easy multichannel current tester, can realize a reometer conversion testing two-way electric current, easy for operation, be not easy the wrong line, when the operator uses, only need be inserted on substrate by the connector of connection substrate and just can test afterwards; Three reometers controlling simultaneously by waver can satisfy the demand of testing simultaneously six road electric currents, can in saving test board space, when avoiding operator's faulty operation to cause product to burn out, improve operator's work efficiency.
Technical scheme of the present invention is achieved in that
A kind of simple and easy multichannel current tester comprises waver, timer and several reometers; Corresponding each reometer is provided with a relay group, and described relay group comprises the first relay, the second relay and the 3rd relay; Described waver can be controlled described timer and get electric work, and described waver can be selected the coil of described first relay of control and the coil of described the second relay gets electric work; The coil that described timer can be controlled described the 3rd relay gets electric work; Can the described reometer of short circuit when the coil of described the 3rd relay gets electric work, and make the first circuit of electric current to be measured and the second circuit form path, can make described reometer and described the first circuit form path when the coil of described the first relay gets electric work, can make described reometer and described the second circuit form path when the coil of described the second relay gets electric work.
as a further improvement on the present invention, described waver can be controlled described timer and get electric work, and described waver can be selected the structure that a coil of controlling the coil of described the first relay and described the second relay gets electric work: be provided with direct supply, described waver is octal fourth gear switch, described octal is pin one, pin two, pin three, pin four, pin five, pin six, pin seven and pin eight, wherein, after being connected with pin four, pin one is connected with an end of the coil of described timer, the other end of the coil of described timer is connected with the positive pole of described power supply, be connected with an end of the coil of described the first relay after pin six is connected with pin five, the other end of the coil of described the first relay is connected with the positive pole of described power supply, be connected with an end of the coil of described the second relay after pin eight is connected with pin seven, the other end of the coil of described the second relay is connected with the positive pole of described power supply, when described waver is in one grade, pin one is connected with the negative pole of described power supply with pin five simultaneously, when described waver is in second gear, pin two is connected with the negative pole of described power supply with pin six simultaneously, when described waver is in third gear, pin three is connected with the negative pole of described power supply with pin seven simultaneously, and when described waver was in fourth gear, pin four was connected with the negative pole of described power supply with pin eight simultaneously.
As a further improvement on the present invention, the structure that the coil that described timer can be controlled described the 3rd relay gets 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 power supply, the normally closed contact of described timer is connected with an end of the coil of described the 3rd relay, and the other end of the coil of described the 3rd relay is connected with the positive pole of described power supply.
As a further improvement on the present invention, can the described reometer of short circuit when the coil of described the 3rd relay gets electric work, and make the first circuit of electric current to be measured and the second circuit form path, can make described reometer and described the first circuit form path when the coil of described the first relay gets electric work, the structure that can make described reometer and described the second circuit form path when the coil of described the second relay gets electric work is: described the first relay, the second relay and the 3rd relay comprise respectively two moving contacts, two normally closed contacts and two normally opened contacts;
A moving contact of described the 3rd relay is connected with an end of the cut-off point of described the first circuit and a moving contact of the first relay respectively, and another moving contact of described the 3rd relay is connected with an end of the cut-off point of described the second circuit and a moving contact of the second relay respectively; A normally opened contact of described the 3rd relay is connected with the other end of the cut-off point of described the first circuit and another moving contact of described the first relay respectively, and another normally opened contact of described the 3rd relay is connected with the other end of the cut-off point of described the second circuit and another moving contact of described the second relay respectively;
The positive pole of described reometer is connected with a normally opened contact of described the first relay and a normally opened contact of described the second relay respectively, and the negative pole of described reometer is connected with another normally opened contact of described the first relay and another normally opened contact of described the second relay respectively;
Two normally closed contacts of described the first relay are connected to each other, and two normally closed contacts of described the 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 the first relay, the coils from parallel connection of coils of another relay indicating light and described the second relay.
As a further improvement on the present invention, be provided with three described reometers.
The invention has the beneficial effects as follows: the invention provides a kind of simple and easy multichannel current tester, select one by waver and control the first relay and the second relay gets electric work, can realize using the function of a reometer test two-way electric current; But, control during the first relay and the second relay get electric transfer process at waver, it is the transfer process that reometer is measured the electric current of two circuits, electric current in the time of must guaranteeing to measure in two circuits can not disconnect, because, article one, can increase rapidly electric high in another circuit after circuit disconnects, cause the damage of test load lamp.Therefore, the present invention is provided with the 3rd relay, and control the timer that the 3rd relay gets electric work, coordinate the gear of waver to select, can realize the reometer converted measurement wherein during a circuit by the 3rd relay short circuit the first relay and the second relay, another circuit does not disconnect.Better, 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, be 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 the first relay, and the connection of the 5th relay and the 8th relay is with above-mentioned the second relay, and the connection of the 6th relay and the 9th relay is with above-mentioned the 3rd relay.Like this, the waver coil that can control simultaneously the first, the 4th and the 7th relay gets electric work; The coil that also can control simultaneously the second, the 5th and the 8th relay gets electric work, namely can realize can be exchanged into another three road electric currents of test by Control after three reometer test three road electric currents, and realizing between them guaranteeing that the circuit of each electric current to be measured does not disconnect in conversion work.The function that three reometers of the present invention are tested six road electric currents is simultaneously compared the method that tradition adopts the six vertical multimeters test of independence for Taiwan six road electric currents, can solve the test table wiring numerous, take local large, the easy wrong problem that causes product to burn out.The simple and easy multichannel current tester that used the present invention just can have been tested after only needing the connector of several connection substrates to be inserted on substrate, has saved the space and can not cause product to burn out by the wrong line.Simultaneously, during test, the operator is as long as adjust the shelves of waver, just can complete the test of six route road electric currents, is not easy when the operator adjusts to make a mistake, and so also just relatively improved efficient.
Description of drawings
Fig. 1 is the simple and easy Multi-path electricity current test of the present invention instrument circuit fundamental diagram (the second reometer and the 4th, the 5th identical with being connected of first, second, and third relay with the first reometer with the connection of the 6th relay, the 3rd reometer and the 7th, the 8th identical with being connected of first, second, and third relay with the first reometer with the connection of the 9th relay, the connection of omitting 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 circuit L2---the 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 and easy multichannel current tester comprises waver BK, timer TAM and a reometer; To should reometer, be provided with a relay group, described relay group comprises the first relay J 1, the second relay J 2 and the 3rd relay J 3; Separately be provided with direct supply DC, described waver is octal fourth 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 the 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 power supply; Be connected with an end of the coil of described the first relay after pin six is connected with pin five, the other end of the coil of described the first relay is connected with the positive pole of described power supply; Be connected with an end of the coil of described the second relay after pin eight is connected with pin seven, the other end of the coil of described the second relay is connected with the positive pole of described power supply; When described waver is in one grade, pin one is connected with the negative pole of described power supply with pin five simultaneously, when described waver is in second gear, pin two is connected with the negative pole of described power supply with pin six simultaneously, when described waver is in third gear, pin three is connected with the negative pole of described power supply with pin seven simultaneously, and when described waver was in fourth gear, pin four was connected with the negative pole of described power supply with pin eight simultaneously.Like this, described waver can be controlled described timer and get electric work, and described waver can be selected the coil J11 of described first relay of control and the coil J21 of described the second relay gets 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 power supply, the normally closed contact of described timer is connected with an end of the coil of described the 3rd relay, and the other end of the coil of described the 3rd relay is connected with the positive pole of described power supply.Like this, the described timer coil J31 that can control described the 3rd relay gets electric work;
Described the first relay, the second relay and the 3rd relay comprise respectively two moving contact J12, J22, J32, two normally closed contact J13, J23, J33 and two normally opened contact J14, J24, J34; A moving contact J32 of described the 3rd relay is connected with an end of the cut-off point of the first circuit L1 and a moving contact J12 of the first relay respectively, and another moving contact J32 of described the 3rd relay is connected with an end of the cut-off point of the second circuit L2 and a moving contact J22 of the second relay respectively; A normally opened contact J34 of described the 3rd relay is connected with the other end of the cut-off point of the first circuit L1 and another moving contact J12 of described the first relay respectively, and another normally opened contact J34 of described the 3rd relay is connected with the other end of the cut-off point of the second circuit L2 and another moving contact J22 of described the second relay respectively; The positive pole of described reometer is connected with a normally opened contact J14 of described the first relay and a normally opened contact J24 of described the second relay respectively, and the negative pole of described reometer is connected with another normally opened contact J14 of described the first relay and another normally opened contact J24 of described the second relay respectively; Two normally closed contact J13 of described the first relay are connected to each other, and two normally closed contact J23 of described the second relay are connected to each other.Like this, can the described reometer of short circuit when the coil of described the 3rd relay gets electric work, and make the first circuit L1 of electric current to be measured and the second circuit L2 form path, can make described reometer and the first circuit L1 form path when the coil of described the first relay gets electric work, can make described reometer and the second circuit L2 form path when the coil of described the second relay gets electric work.
In sum, select one by waver and control the first relay and the second relay gets electric work, can realize using the function of a reometer test two-way electric current; But, control during the first relay and the second relay get electric transfer process at waver, it is the transfer process that reometer is measured the electric current of two circuits, electric current in the time of must guaranteeing to measure in two circuits can not disconnect, because, article one, can increase rapidly electric high in another circuit after circuit disconnects, cause the damage of test load lamp.Therefore, the present invention is provided with the 3rd relay, and control the timer that the 3rd relay gets electric work, coordinate the gear of waver to select, can realize the reometer converted measurement wherein during a circuit by the 3rd relay short circuit the first relay and the second relay, another circuit does not disconnect.
Better, separately be 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 the first relay, the coils from parallel connection of coils of another relay indicating light D2 and described the second relay.Relay indicating light is used to indicate the duty that the first relay and the second relay are changed electricly.
Better, 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, be respectively the first relay J 1, the 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 the first relay, and the connection of the 5th relay and the 8th relay is with above-mentioned the second relay, and the connection of the 6th relay and the 9th relay is with above-mentioned the 3rd relay.Like this, the waver coil that can control simultaneously the first, the 4th and the 7th relay gets electric work; The coil that also can control simultaneously the second, the 5th and the 8th relay gets electric work, namely can realize can be exchanged into another three road electric currents of test by Control after three reometer test three road electric currents, and realizing between them guaranteeing that the circuit of each electric current to be measured does not disconnect in conversion work.
Below take six line currents of three reometers test as example, the principle of operation of the simple and easy multichannel current tester of the present invention is described:
Three reometers are respectively the first reometer A1, the second reometer A2, the 3rd reometer A3.Article six, circuit is respectively the first circuit 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, be respectively the first relay J 1, the 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.Corresponding the first relay J 1 of the first reometer, the second relay J 2, the 3rd relay J 3, corresponding the 4th relay J 4 of the second reometer, the 5th relay J 5, the 6th corresponding the 7th relay J 7 of relay J 6, the three reometers, the 8th relay J 8, the 9th relay J 9.
At first, waver is placed in one grade, at this moment, pin one and pin five are connected with dc power cathode, because pin five is connected with coil one end of the first relay, the 4th relay and the 7th relay respectively, therefore, after pin five switches on power, make the coil of the first relay, the 4th relay and the 7th relay get electric work, the normally opened contact and the moving contact that drive the first relay, the 4th relay and the 7th relay are connected.The first reometer shows the loop current of the first circuit by first relay access the first circuit; The second reometer shows the loop current of tertiary circuit by the 4th relay access tertiary circuit; The 3rd reometer shows the loop current of the 5th circuit by the 7th relay access the 5th circuit.Be connected with an end of the coil of timer after being connected with pin four due to pin one, therefore, after pin one switches on power, make the coil of timer get 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 the first circuit, tertiary circuit and the 5th circuit.Simultaneously, the normally closed contact of the second relay, the 5th relay and the 8th relay and moving contact 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, at this moment, pin two and pin six are connected with dc power cathode, be connected with an end of the coil of the first relay, the 4th relay, the 7th relay after being connected with pin five due to pin six, therefore, the coil of the first relay, the 4th relay and the 7th relay continues to keep to get electric work state.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, thereby make the coil of the 3rd relay, the 6th relay and the 9th relay get electric work, and drive its two moving contact and the closed connection of two normally opened contacts, thereby with the first reometer, the second reometer and the 3rd reometer short circuit, and make the first circuit, tertiary circuit and the 5th circuit form path.Although namely the coil of the first relay, the 4th relay and the 7th relay is in to get electric work state, the first reometer, the second reometer and the 3rd reometer do not show the current value of the first circuit, tertiary circuit and the 5th circuit.Simultaneously, the normally closed contact of the second relay, the 5th relay and the 8th relay and moving contact 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, at this moment, pin three and pin seven are connected with dc power cathode, because the end of pin seven with the coil of the second relay, the 5th relay and the 8th relay is connected, therefore, after pin seven switches on power, make the coil of the second relay, the 5th relay and the 8th relay get electric work, the normally opened contact and the moving contact that drive the second relay, the 5th relay and the 8th relay are connected.But pin three is neutral gear, make the coil losing electricity of timer, the moving contact of timer still is in reset condition, the moving contact of timer and normally closed contact are connected, thereby make the coil of the 3rd relay, the 6th relay and the 9th relay get electric work, and drive its two moving contact and the closed connection of two normally opened contacts, thereby with the first reometer, the second reometer and the 3rd reometer short circuit, and make the second circuit, the 4th circuit and the 6th circuit form path.Although namely the coil of the second relay, the 5th relay and the 8th relay is in to get electric work state, 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.Simultaneously, the normally closed contact of the first relay, the 4th relay and the 7th relay and moving contact are connected, and make the first circuit, tertiary circuit and the 5th circuit be in channel status.
At last, waver is placed in fourth gear, at this moment, pin four and pin eight are connected with dc power cathode, be connected with an end of the coil of the second relay, the 5th relay and the 8th relay after joining due to pin eight and pin seven, therefore, after pin eight switches on power, make the coil of the second relay, the 5th relay and the 8th relay get electric work, the normally opened contact and the moving contact that drive the second relay, the 5th relay and the 8th relay are connected.The first reometer shows the loop current of the second circuit by second relay access the second circuit; The second reometer shows the loop current of the 4th circuit by the 5th relay access the 4th circuit; The 3rd reometer shows the loop current of the 6th circuit by the 8th relay access the 6th circuit.Because the end of pin four with the coil of timer is connected, therefore, after pin four switches on power, make the coil of timer get 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 the second circuit, the 4th circuit and the 6th circuit.Simultaneously, the normally closed contact of the first relay, the 4th relay and the 7th relay and moving contact are connected, and make the first circuit, tertiary circuit and the 5th circuit be in channel status.
To sum up, the present invention can realize that three reometers test the function of six road electric currents simultaneously, compare the method that tradition adopts the six vertical multimeter test of independence for Taiwan six road electric currents, use the simple and easy duplex tester test of the present invention six road electric currents, solved the test table wiring numerous, take the place large, the problem that easy wrong causes product to burn out.The simple and easy multichannel current tester that used the present invention just can have been tested after only needing the connector of several connection substrates to be inserted on substrate, has saved the space and can not cause product to burn out by the wrong line.Simultaneously, use the simple and easy duplex tester test of the present invention six road electric currents, the operator is as long as adjust the shelves of waver, just can complete the test of six route road electric currents, is not easy when the operator adjusts to make a mistake, and so also just relatively improved efficient.
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 is by carrying out modification or the change on various forms to above-described embodiment, but do not deviate from the situation of essence of the present invention, within all dropping on protection scope of the present invention.
Claims (6)
1. a simple and easy multichannel current tester, is characterized in that: comprise waver (BK), timer (TAM) and several reometers; Corresponding each reometer is provided with a relay group, and described relay group comprises the first relay (J1), the second relay (J2) and the 3rd relay (J3); Described waver can be controlled described timer and get electric work, and described waver can be selected the coil (J11) of described first relay of control and the coil (J21) of described the second relay gets electric work; The coil (J31) that described timer can be controlled described the 3rd relay gets electric work; Can the described reometer of short circuit when the coil of described the 3rd relay gets electric work, and make first circuit (L1) of electric current to be measured and the second circuit (L2) form path, can make described reometer and described the first circuit form path when the coil of described the first relay gets electric work, can make described reometer and described the second circuit form path when the coil of described the second relay gets electric work.
2. simple and easy multichannel current tester according to claim 1, it is characterized in that: described waver can be controlled described timer and get electric work, and described waver can be selected the structure that a coil of controlling the coil of described the first relay and described the second relay gets electric work: be provided with direct supply (DC), described waver is octal fourth 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, after being connected with pin four, pin one is connected with an end of the coil (TAM1) of described timer, the other end of the coil of described timer is connected with the positive pole of described power supply, be connected with an end of the coil of described the first relay after pin six is connected with pin five, the other end of the coil of described the first relay is connected with the positive pole of described power supply, be connected with an end of the coil of described the second relay after pin eight is connected with pin seven, the other end of the coil of described the second relay is connected with the positive pole of described power supply, when described waver is in one grade, pin one is connected with the negative pole of described power supply with pin five simultaneously, when described waver is in second gear, pin two is connected with the negative pole of described power supply with pin six simultaneously, when described waver is in third gear, pin three is connected with the negative pole of described power supply with pin seven simultaneously, and when described waver was in fourth gear, pin four was connected with the negative pole of described power supply with pin eight simultaneously.
3. simple and easy multichannel current tester according to claim 1, it is characterized in that: the structure that the coil that described timer can be controlled described the 3rd relay gets 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 power supply, the normally closed contact of described timer is connected with an end of the coil of described the 3rd relay, and the other end of the coil of described the 3rd relay is connected with the positive pole of described power supply.
4. simple and easy multichannel current tester according to claim 1, it is characterized in that: can the described reometer of short circuit when the coil of described the 3rd relay gets electric work, and make the first circuit of electric current to be measured and the second circuit form path, when getting electric work, the coil of described the first relay can make described reometer and described the first circuit form path, the structure that can make described reometer and described the second circuit form path when the coil of described the second relay gets electric work is: described the first relay, the second relay and the 3rd relay comprise respectively two moving contact (J12, J22, J32), two normally closed contact (J13, J23, J33) and two normally opened contact (J14, J24, J34),
A moving contact of described the 3rd relay is connected with an end of the cut-off point of described the first circuit and a moving contact of the first relay respectively, and another moving contact of described the 3rd relay is connected with an end of the cut-off point of described the second circuit and a moving contact of the second relay respectively; A normally opened contact of described the 3rd relay is connected with the other end of the cut-off point of described the first circuit and another moving contact of described the first relay respectively, and another normally opened contact of described the 3rd relay is connected with the other end of the cut-off point of described the second circuit and another moving contact of described the second relay respectively;
The positive pole of described reometer is connected with a normally opened contact of described the first relay and a normally opened contact of described the second relay respectively, and the negative pole of described reometer is connected with another normally opened contact of described the first relay and another normally opened contact of described the second relay respectively;
Two normally closed contacts of described the first relay are connected to each other, and two normally closed contacts of described the second relay are connected to each other.
5. simple and easy multichannel 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 the first relay, the coils from parallel connection of coils of another relay indicating light and described the second relay.
6. the described simple and easy multichannel current tester of according to claim 1 to 5 any one, 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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| CN103134975A true CN103134975A (en) | 2013-06-05 |
| CN103134975B CN103134975B (en) | 2016-03-30 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108107397A (en) * | 2017-12-15 | 2018-06-01 | 广东雅达电子股份有限公司 | A kind of direct current table automatic detection device and method |
| 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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| 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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|---|---|
| CN103134975B (en) | 2016-03-30 |
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