Patents
Literature
26 results about "Continuity test" patented technology
Efficacy Topic
Property
Owner
Technical Advancement
Application Domain
Technology Topic
Technology Field Word
Patent Country/Region
Patent Type
Patent Status
Application Year
Inventor
In electronics, a continuity test is the checking of an electric circuit to see if current flows (that it is in fact a complete circuit). A continuity test is performed by placing a small voltage (wired in series with an LED or noise-producing component such as a piezoelectric speaker) across the chosen path. If electron flow is inhibited by broken conductors, damaged components, or excessive resistance, the circuit is "open".
Line detection system and device for main transformer of locomotive
The invention relates to the technical field of locomotive line detection, in particular to a line detection system and device for a locomotive main transformer, and the system comprises a transformer which comprises an input side and an output side, the input side is used for being connected with a power supply, the output side comprises an end a and an end n, the end a is used for being connected with the end A of the main transformer, and the end n is used for being connected with the end X of the main transformer; the end a is connected with an over-current relay; the input side is connected with a conduction test loop, an operation test loop and an overload test loop; the conduction test loop is used for testing the conduction states of the main transformer, the a end and the n end; the operation test loop is used for carrying out power supply detection on the main transformer; when the transformer is in overload operation, the overcurrent relay drives the overload test loop to be conducted; therefore, through the arrangement of the conduction test loop, the operation test loop and the overload test loop, the conduction state, the power supply condition and the overload condition of the main transformer line can be rapidly detected, and cumbersome connection and disconnection operation is not needed.
Owner:TIANJIN LOCOMOTIVE CO LTD
Cable continuity test apparatus and method
PCT designated stageWO2026097705A1Short-circuit testingContinuity testingElectrical conductorStructural engineering
The present invention relates to the technical field of cable processing, and in particular to a cable continuity test apparatus, comprising: a cable clamping assembly, wherein the cable clamping assembly comprises clamping claws, and the clamping claws are used for clamping a cable jacket; and a test assembly arranged opposite to a clamping center of the cable clamping assembly, wherein the test assembly comprises two first test clamps, two second test clamps and two third test clamps; the first test clamps are cylindrical and are used for clamping a shielding layer; the second test clamps and the third test clamps are sheet-shaped, and the end of each of the second test clamps and the third test clamps facing the cable is provided with a semicircular recess; two sets of the semicircular recesses are respectively used for clamping an insulating layer and a central conductor of the cable; a circle formed by combining the two semicircular recesses of the second test clamps is adapted to the outer diameter of the insulating layer, and the two second test clamps are conductors; when an insulator is clamped in place, the two second test clamps can be electrically connected; and the first test clamps, the second test clamps, and the third test clamps are further used for power-on test between every two test clamps.
Owner:JIANGSU BOZHIWANG AUTOMATION EQUIP CO LTD
TERMINAL MONITORING SYSTEMS AND PROCEDURES FOR ERROR-FREE HOSE TERMINAL INSTALLATION
PendingDE102024126822A1Pipe couplingsStructural/machines measurementControl systemControl engineering
A method for operating a clamp monitoring system includes a control system that receives confirmation that a workpiece has entered a test area within a workstation. In response to receiving this confirmation, the control system issues command prompts to: (1) position a continuity test device at a target clamping location where a hose clamp secures a hose to a hose connector on the workpiece, and (2) activate the test device after it has been positioned at the target clamping location. The test device transmits continuity data indicating electrical continuity of the hose clamp to the control system. A position sensing device transmits position data indicating the real-time position of the device to the control system.The controller issues a message indicating that the hose clamp is properly attached to the workpiece when the continuity state shows electrical continuity at the hose clamp and the real-time fixture position matches the target clamping location.
Owner:GM GLOBAL TECHNOLOGY OPERATIONS LLC
Rotary feeding device for automatically screening positive electrode and negative electrode of component
The invention relates to the field of photo-thermal equipment and component manufacturing thereof, in particular to a rotary feeding device for automatically screening positive and negative electrodes of components, which comprises a rotary conveying mechanism and a positive and negative electrode detecting and screening mechanism, the rotary conveying mechanism comprises a rotary disc capable of intermittently rotating, a clamping piece circumferentially arranged on the rotary disc and at least two clamping unlocking pieces; the clamping piece comprises a clamping block for clamping the component and an elastic reset structure for providing an acting force for downward pressing of the clamping block; the clamping unlocking piece can slide to the position below any clamping piece to lift the clamping piece. And the positive and negative electrode detecting and screening mechanism comprises a conduction test table for detecting positive and negative electrode pins of the components and a component recycling assembly, when abnormity is detected, the clamping unlocking piece lifts the clamping piece, and meanwhile, the component recycling assembly recycles the components. According to the device, the processing efficiency and the transfer efficiency of the photo-thermal equipment components are improved, the transfer matching time is shortened, meanwhile, the flexibility and the universality of the transfer device are improved, and the practicability of multi-scene processing is improved.
Owner:DONGGUAN KAOGLE ELECTRONICS CO LTD
An automated testing method and testing equipment for multi-channel controlled USB connection continuity.
This invention provides an automated testing method and equipment for multi-channel controlled USB connection continuity. The method includes the following steps: S1: Connect the USB continuity test box to a 5V power input port; S2: Insert the test USB peripheral into the USB female connector; S3: Insert the USB continuity test male connector into the USB female connector of the terminal under test; S4: Connect the serial port input port to a computer and input serial port control commands to the serial port control module via the computer; S5: After receiving the commands, the serial port control module controls the opening and closing of the serial port relay to realize the continuity of the VCC power supply line. This invention uses automated USB connection continuity testing. By designing a script on the computer to control the continuity of the 5V power input of the USB VCC, the USB connection continuity test can be realized. This invention is reliable, low-cost, and the testing method is simple and easy to operate.
Owner:YUKUAI CHUANGLING INTELLIGENT TECH (NANJING) CO LTD
Continuity test system
PendingJP2026010493ALine/current collector detailsContinuity testingInformation controlElectrical connection
To provide a conduction inspection system capable of easily performing conduction inspection of a wire harness while suppressing a burden on a worker.SOLUTION: The conduction inspection system 40 includes a laser device 80, a first infrared camera 110, and a control device 200. The control device 200 controls the laser device 80 so as to irradiate a terminal to be irradiated electrically connected to an electric wire to be inspected with laser light for a predetermined time. The control device 200 controls the first infrared camera 110 to acquire the first and second temperature information of the terminal to be measured electrically connected to the electric wire to be inspected before and after irradiating the terminal to be irradiated with the laser light. The control device 200 calculates a value of the temperature change of the terminal to be measured based on the first temperature information and the second temperature information. The control device 200 determines the continuity state of the electric wire to be inspected based on the value of the temperature change of the terminal to be measured and the reference value associated with the electric wire to be inspected.SELECTED DRAWING: Figure 1
Owner:YAZAKI CORP
Spoolable splice for use in electrical submersible pump system
PCT designated stageWO2026093906A1Specific fluid pumpsDrilling rodsPower cableStructural engineering
Systems and methods are provided for improved installation speed and reliability for mechanical cable splices to safely retrieve an armored electrical cable and attached electrical submersible pump (ESP) from a wellbore. The ESP can be brought to the surface for replacement or maintenance and reinstallation along with the same armored power cable. Embodiments of cable splice devices are provided to establish a strong splice having tensile strength required or exceeding that needed to retrieve the cable and ESP from the wellbore safely. A bypass load-bearing clamp may be used temporarily to further assist the tensile strength of the cable non-electrical splice if such tensile strength is deemed insufficient to safely overcome the required retrieval forces. Furthermore, the splice includes a short-circuit electrical connector that enables a quick electrical continuity test for determining if the cable is suitable for redeployment.
Owner:ALKHORAYEF GASOLINEEUM
Test module communication structure based on on-state tester
ActiveCN116243022BRealize traceabilityImplement module indication functionData switching detailsElectrical measurement instrument detailsCommunication interfaceData signal
This invention discloses a communication structure for a test module based on a continuity tester, comprising: a continuity test host, having a host MCU and host data signal output and input terminals connected thereto; a continuity test point board, having multiple communication interfaces, each of which is connected to a test bus via a corresponding first switch and grounded via a corresponding second switch; and multiple communication node modules, each having a module indicator light, a node MCU, and node data signal input and output terminals connected thereto. The module indicator lights, node data signal inputs, and node data signal outputs are all connected to their respective communication interfaces via module indicator light control lines, and the module indicator lights are also connected to the host MCU via indicator light enable signal lines. This structure forms a communication network connecting all test modules, enabling the test host to read and save the test results and parameter settings of the test modules, thus achieving traceability of the tested products.
Owner:SHANGHAI TAIYANG HARNESS TESTING SYST CO LTD
Integrated testing device for conduction and deformation of mobile phone metal element
ActiveCN224203397Ureduce in quantityreduce complexityElectrical/magnetic solid deformation measurementContinuity testingContinuity testUSB
The utility model relates to the technical field of electronic testing and measurement, in particular to an integrated testing device for conduction and deformation of a mobile phone metal element. Comprising a working table, a controller, an integrated conduction and deformation testing device and a test driving device, the integrated conduction and deformation testing device is used for conducting conduction and deformation testing on a mobile phone tail insertion original piece, the test driving device is located at the top of the working table and used for conducting detection driving, and the integrated conduction and deformation testing device comprises a conduction testing piece, a hard pulling and inserting preventing buffering piece and a deformation testing piece. The conduction test piece comprises a conduction test head and a USB male head, the conduction test head is used for being connected with a mobile phone tail jack, the deformation test piece is located in the conduction test head, and the conduction test head is electrically connected with the USB male head through a wire. According to the method, conduction testing and deformation detection are integrated, the number and complexity of detection equipment are reduced, the equipment purchase and maintenance cost is reduced, and the detection precision is far higher than that of a traditional method.
Owner:HUIZHOU TIANJUN IND CO LTD
A multi-point parallel test device for harness continuity test
ActiveCN224405791UTo achieve the purpose of automatic classificationAvoid manual sorting problemsElectric machineContinuity test
The utility model discloses a kind of multi-point parallel test devices of wiring harness conduction test, belong to wiring harness conduction test device technical field, including rectangular frame, the inside of the rectangular frame is slidably connected with two storage boxes, the inner wall of rectangular frame is rotatably connected with pivot, the outer surface of pivot is fixedly connected with rotating plate, the right side of pivot is provided with first stepper motor, the right side of rectangular frame is provided with protective frame, the inner wall of protective frame is fixedly connected with controller, the upper surface of rectangular frame is fixedly connected with rectangular plate, the right side of rectangular plate is provided with second stepper motor, the output of second stepper motor is fixedly connected with threaded shaft, the outer surface of threaded shaft is rotatably connected to the inner wall of rectangular plate.The multi-point parallel test device of wiring harness conduction test, by first stepper motor can rotate counterclockwise forty-five degrees, make unqualified wiring harness drop to rear storage box, to realize the purpose of automatic classification, avoid the problem that subsequent need manual sorting.
Owner:SUZHOU SHENGHAIHUI ELECTRONICS CO LTD
On-off detection device and system for cable
This application provides a cable continuity testing device and system. The cable continuity testing device has at least one set of cable connectors on its housing. Each set of cable connectors includes a first connector and a second connector of different models. The first connector corresponds to the interface at the first end of the cable to be tested, and the second connector corresponds to the interface at the second end of the cable to be tested. Thus, the interfaces at both ends of the cable to be tested can be connected simultaneously through one set of cable connectors, improving the efficiency of cable continuity testing and avoiding the possible testing errors that may occur when checking each jack in the interfaces at both ends of the cable one by one with a multimeter, thereby improving the accuracy of cable continuity testing. The continuity test results of the cable to be tested are displayed by a display module set on the housing of the continuity testing device, which makes it easy for users to intuitively observe the continuity status of the cable to be tested and reduces the difficulty of operating the cable continuity test.
Owner:BEIJING RUNKE GENERAL TECH
Device for testing atomization effect of nozzle
The utility model discloses a nozzle atomization effect testing device, which comprises a supporting base and a testing shell arranged above the supporting base, one side of the testing shell is provided with a nozzle connection testing unit, the other side of the testing shell is provided with a negative pressure leading-out unit, and the negative pressure leading-out unit is connected with the nozzle connection testing unit. An L-shaped fixing frame is further installed on the supporting base and used for installing the high-speed camera shooting detection system. According to the nozzle atomization effect testing device provided by the utility model, the nozzle connection testing unit comprising a plurality of nozzle connection pipes is arranged, a plurality of nozzles to be tested are supported to be installed at the same time, or testing stations are rapidly switched by rotating the testing shell, so that rapid and continuous testing of batch nozzles is realized. The problem of low efficiency caused by the fact that only a single nozzle can be tested at a time and frequent shutdown, disassembly and replacement are needed in the prior art is solved, the method is particularly suitable for factory batch detection scenes of the nozzles, intermittent waiting time is effectively shortened, and the testing process is more coherent and efficient.
Owner:DE HUA XIAN CHANG DE TAO CI PEI JIAN YOU XIAN GONG SI
Spoolable splice for use in electrical submersible pump system
PendingUS20260121393A1Cable fittings in presence of gas/oilApparatus for joining/termination cablesPower cableStructural engineering
Systems and methods are provided for improved installation speed and reliability for mechanical cable splices to safely retrieve an armored electrical cable and attached electrical submersible pump (ESP) from a wellbore. The ESP can be brought to the surface for replacement or maintenance and reinstallation along with the same armored power cable. Embodiments of cable splice devices are provided to establish a strong splice having tensile strength required or exceeding that needed to retrieve the cable and ESP from the wellbore safely. A bypass load-bearing clamp may be used temporarily to further assist the tensile strength of the cable non-electrical splice if such tensile strength is deemed insufficient to safely overcome the required retrieval forces. Furthermore, the splice includes a short-circuit electrical connector that enables a quick electrical continuity test for determining if the cable is suitable for redeployment.
Owner:ALKHORAYEF GASOLINEEUM
Mini led substrate empty board test system and method
ActiveCN116148634Bshort test timeImprove efficiencyElectronic circuit testingContinuity testingControl cellContinuity test
This invention relates to a blank board testing system and method for Mini LED substrates, used for conducting continuity tests on the Mini LED substrate circuitry before chip packaging. The blank board testing system includes a Mini LED substrate, a blank board testing module, and a result display unit. This invention employs a method where the control unit for controlling the test path and the Mini LED substrate circuitry under test are contactably connected to any corner pad in a matrix of pads via a substrate connector to perform continuity testing. A single, simple operation allows for one-click testing of an entire substrate, resulting in short testing time and high efficiency. Furthermore, this connection control method is adaptable to all products using fully connected matrix pads, saving on personnel training costs and fixture development costs. In addition, this invention uses a storage and analysis unit to record the continuity test results of multiple Mini LED substrate circuits for overall analysis and visualization, facilitating timely detection and improvement of process defects and saving unnecessary costs.
Owner:SHEN ZHEN XIN DA HUI RUAN XING DIAN LU KE JI YOU XIAN GONG SI
on-off tester
1. The name of the design product: continuity tester. 2. The use of the design product: for line continuity test. 3. The design points of the design product: in shape. 4. The picture or photo that best shows the design points: perspective view.
Owner:广州市宏林技术有限公司
Energy distribution unit assembly conduction test system and method
PendingCN121878267AElectrical measurement instrument detailsContinuity testingData acquisitionContinuity test
The invention relates to the technical field of electrical testing, in particular to an energy distribution unit assembly conduction testing system and method, and the system comprises an automatic testing cabinet which comprises a switching power supply, a programmable power supply, a universal meter, a tester and a switching circuit board assembly, and the switching power supply is connected with an energy distribution unit assembly relay control interface; the programmable power supply, the universal meter and the tester are connected with the switching circuit board assembly, the switching circuit board assembly is connected with the energy distribution unit assembly, different test channels can be switched, and the universal meter and the tester are connected to the corresponding channels; the system further comprises a collection device and an upper computer, the upper computer is connected with the collection device and the upper computer, the collection device collects function test demand data, the upper computer generates a control instruction according to the function test demand data, automatically switches a test channel, conducts a conduction test on the energy distribution unit assembly through the channel, collects test data through a universal meter and a tester, and finally generates a conduction test result according to the data. Therefore, the problems of low automation degree, low testing efficiency, poor safety and the like in the testing process are solved.
Owner:CHINA FAW CO LTD
Clamp monitoring system and method for error-proof hose clamp installation
PendingCN121409095APipe couplingsStructural/machines measurementControl engineeringMonitoring system
The invention discloses a clamp monitoring system and a method for mounting a mistake-proof hose clamp. A method of operating a jig monitoring system includes a system controller that receives confirmation that a working component enters a test package within a workstation. In response to receiving the confirmation, the controller outputs a command prompt to: (1) position the continuity test device at a target clamp position at which the hose clamp attaches the hose to the hose connector of the working component, and (2) activate the test device after being positioned at the target clamp position. The testing device transmits continuity data indicative of electrical continuity of the hose clamp to the controller. The position sensing device transmits position data indicative of the real-time position of the test device to the controller. The controller outputs a notification that the hose clamp is correctly mounted on the working component in response to the continuity status indicating electrical continuity at the hose clamp and the real-time device position being aligned with the target clamp position.
Owner:GM GLOBAL TECHNOLOGY OPERATIONS LLC
Aircraft switch conductivity test tool
ActiveCN223827801UResistance/reactance/impedenceContinuity testingStructural engineeringContinuity test
The utility model relates to the technical field of microswitch performance detection, and provides an aircraft switch conductivity test tool comprising a base plate provided with a support; the dial indicator is fixedly mounted on the bracket; the test box is fixedly connected to the bottom plate and is opposite to the bracket, a support for fixing an electric switch and a wiring terminal for connecting an electric switch contact are arranged in the test box, and a test hole electrically connected with the wiring terminal is formed in the side surface, far away from the bracket, of the test box; a meter pen of the universal meter is inserted into the test hole; the test rod is rotationally connected to the side surface, opposite to the bracket, of the test box; wherein one end of the test rod abuts against the measuring head of the dial indicator, and the other end extends into the test box and abuts against the button of the switch. Through slow rotation of the test rod, the process that the button of the switch is completely compressed or rebounded can be simulated, meanwhile, whether the conductivity of the switch is normal or not can be judged by combining the readings of the universal meter and the dial indicator, and hidden faults occurring in the process that the button of the switch is compressed or rebounded can be detected.
Owner:CHENGDU FALCON AIRCRAFT ENG SERVICES CO LTD
Rapid clamping device for circuit board conduction test
ActiveCN224247783UElectronic circuit testingMeasurement instrument housingContinuity testControl theory
The utility model provides a circuit board conduction test rapid clamping device which comprises a base, a clamping mechanism is fixedly installed in the middle of the base, a bearing table is fixedly installed in the middle of the top of the base, the clamping end of the clamping mechanism is arranged at the top of the bearing table, a fixing arm is fixedly installed on the rear side of the base, and the fixing arm is fixedly connected with the bearing table. During application, the whole device adopts the design of a three-dimensional adjusting system, the device can be endowed with strong adaptation capability, the device can quickly adapt to electrode layouts of different circuit boards, the design of a hand screwing type fixing screw rod and a limiting hole, and the device is convenient to use while flexible adjustment is guaranteed. Reliable mechanical locking and ordered management of the wiring sleeve on the wire are provided, risks of poor line contact, short circuit and the like are further reduced, the conductive connector and the electrode of the circuit board can be in stable contact, the test accuracy is remarkably improved, meanwhile, manual operation links are greatly reduced, and the detection efficiency is effectively improved.
Owner:SHANGHAI JINHE ELECTRONIC TECH CO LTD
A service continuity test method and system, electronic equipment, and storage medium
The application provides a business continuity test method and system, an electronic device and a storage medium. The method comprises the following steps: if a test request of a target test scenario of a system under test initiated by a target person is received, a continuous pressure test case corresponding to the target test scenario is executed to simulate, by a simulator, that a related system of the system under test continuously sends a request to the system under test and / or uploads a file under the target test scenario; after the system under test is stably operated, the system under test is switched from a production end to a backup end or from a multi-center to a specified center; after the system under test is successfully switched and stably operated, the system under test is switched from the backup end back to the production end or from the specified center back to the multi-center; after the system under test is successfully switched back and stably operated, a test report of the system under test is generated based on monitored test data; whether the service processing capacity of the system under test before and after the switching meets the requirements is judged based on the test report; and if yes, information that the test is successful is fed back.
Owner:CHINA CONSTRUCTION BANK
Clamp monitoring systems and methods for error proofing hose clamp installation
PendingUS20260029309A1Pipe couplingsStructural/machines measurementControl engineeringMonitoring system
A method of operating a clamp monitoring system includes a system controller receiving confirmation that a work part entered a test envelope within a workstation. Responsive to receiving this confirmation, the controller outputs command prompts to: (1) position a continuity testing device at a target clamp location at which a hose clamp attaches a hose to a hose connector of the work part, and (2) activate the testing device after being positioned at the target clamp location. The testing device transmits continuity data indicative of the hose clamp's electrical continuity to the controller. A position sensing device transmits position data indicative of the testing device's real-time position to the controller. The controller outputs a notification that the hose clamp is properly installed on the work part responsive to the continuity status indicating electrical continuity at the hose clamp and the real-time device position aligning with the target clamp location.
Owner:GM GLOBAL TECHNOLOGY OPERATIONS LLC
Via accuracy measurement
ActiveUS12588472B2Electronic circuit testingSemiconductor/solid-state device testing/measurementLanding zoneContinuity test
Methods and pad structures to test via accuracy are provided. A method according to the present disclosure includes forming a first pad and a second pad on a device component, wherein the second pad includes a via landing area and a clearance opening, providing a core substrate that includes a cavity, placing the device component in the cavity, forming a build-up film over the device component and the core substrate, forming a first contact via extending through the build-up film to contact the landing area and a second contact via extending through build-up film and the clearance opening, and performing a continuity test to determine whether the second contact via is in contact with the second pad.
Owner:TAIWAN SEMICONDUCTOR MANUFACTURING CO LTD
Conduction test system and method for engine wire harness
The invention relates to a conductivity test system and method for an engine wire harness, the system comprises a test interface, a dynamic parameter acquisition module, a dynamic on-resistance calculation module, a vibration impedance fluctuation correction module and a comprehensive conductivity determination module, the dynamic parameter acquisition module synchronously acquires multiple parameters, and the modules are in signal connection in sequence and perform progressive linkage calculation. According to the method, testing is achieved through synchronous acquisition, dynamic resistance calculation, vibration correction and comprehensive judgment. According to the scheme, the problems of inaccurate dynamic working condition test and missed aging judgment are solved, accurate and comprehensive conductivity test is realized, and the use reliability of the engine wire harness is guaranteed.
Owner:NANCHANG YOUXING ELECTRONICS & ELECTRICAL APPLIANCE
Auxiliary detection middle frame conduction jig
Owner:DONGGUAN GUANGZHENG PRECISION TECHNOLOGY CO LTD
A comprehensive detection and calibration instrument for non-electric quantity protection device of transformer
This invention discloses a comprehensive testing and calibration instrument suitable for non-electrical quantity protection devices of transformers, relating to the field of transformer testing and protection. It includes a central processing unit, signal conditioning and sampling circuits, a drive circuit, a display circuit, a clock circuit, a communication circuit, and a power supply. The central processing unit includes a main controller; the signal conditioning and sampling circuit includes multiple analog-to-digital converters (AD), digital-to-analog converters (DA), a current signal conditioning module, and a voltage signal conditioning module; the display circuit includes an LCD screen; and all circuits are connected via communication circuits; the power supply uses a rechargeable power supply; the main controller is connected to multiple test modules via the signal conditioning and sampling circuits; the test modules include an insulation / withstand voltage / continuity test module, a temperature measurement module, and a gas relay test module. This invention can perform various tests, improves experimental accuracy, simplifies calibration steps, and greatly shortens calibration time, making testing accurate, simple, time-saving, and labor-saving.
Owner:国网山西省电力有限公司超高压变电分公司
Continuity testing device, Kelvin measuring probe, and static elimination device
ActiveJP7843443B2Electronic circuit testingSemiconductor/solid-state device testing/measurementComputational physicsContinuity test
To automatically and easily inspect presence or absence of continuity between two chuck lead wires of a force wire and a sense wire.SOLUTION: A wafer inspection system includes a wafer chuck 16 having a support surface for holding a wafer to be measured with a Kelvin measurement prober, a probe that contacts a front surface electrode of a semiconductor chip formed on the surface of the wafer, a force line 40F and a sense line 40S that contact a back surface electrode of the semiconductor chip formed on a back surface of the wafer, first connection wiring 64 connected to any one of the force line and the sense line, second connection wiring 66 connected to the other of the force line and the sense line, a first relay 46 and a first resistor 48 provided on the first connection wiring side, and a power source 58 provided on the second connection wiring 66 side. A current loop is formed by electrically coupling the first connection wiring and the second connection wiring via a first relay, a first resistor, and the power source, and a general controller 62 for determining whether the current flows through the current loop is provided.SELECTED DRAWING: Figure 3
Owner:TOKYO SEIMITSU CO LTD