DE2717826B1 - Test device for displaying an electrical voltage and / or its polarity and the passage of current through an electrical conductor - Google Patents
Test device for displaying an electrical voltage and / or its polarity and the passage of current through an electrical conductorInfo
- Publication number
- DE2717826B1 DE2717826B1 DE2717826A DE2717826A DE2717826B1 DE 2717826 B1 DE2717826 B1 DE 2717826B1 DE 2717826 A DE2717826 A DE 2717826A DE 2717826 A DE2717826 A DE 2717826A DE 2717826 B1 DE2717826 B1 DE 2717826B1
- Authority
- DE
- Germany
- Prior art keywords
- electrical
- light
- emitting diodes
- current
- battery
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/14—Indicating direction of current; Indicating polarity of voltage
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
- G01R1/06—Measuring leads; Measuring probes
- G01R1/067—Measuring probes
- G01R1/06788—Hand-held or hand-manipulated probes, e.g. for oscilloscopes or for portable test instruments
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/145—Indicating the presence of current or voltage
Description
Der Griff 1 weist. die beiden von außen sichtbaren Leuchtdioden 11 und 12 auf. Der um den Griff umlaufende Ring 13 schützt vor dem Abrutschen der Finger in die Spannungsquelle. Die Metallspitze 14 an einem Ende des Griffes 1 dient als Kontaktelement zwischen der Prüfeinrichtung und der zu prüfenden Leitung. Gleiches gilt für die Kontaktspitze 15 am Griff 2 Durch das Kabel 16 sind die beiden Griffe miteinander verbunden. The handle 1 has. the two externally visible light-emitting diodes 11 and 12 on. The ring 13 surrounding the handle protects against slipping of the fingers into the voltage source. The metal tip 14 at one end of the handle 1 serves as a Contact element between the test device and the one to be tested Management. The same applies to the contact tip 15 on the handle 2 Through the cable 16, the two are Handles connected to each other.
Der Griff 2 weist ebenfalls einen umlaufenden Ring 17 auf, der zum Schutz gegen das Abrutschen der Finger an die zu prüfende Leitung dient. Auf dem Stück zwischen Metallspitze 15 und Ring 17 ist der Tastschalter 5 vorgesehen. Im Griff 2 ist ferner eine Batterie 3 und eine Schutzdiode 4 untergebracht, die zusammen mit den im Griff befindlichen Schaltelementen nach dem Schaltbild gemäß F i g. 2 verschaltet wird. The handle 2 also has a circumferential ring 17 which is used for Protection against slipping of the fingers on the line to be tested is used. On the The push button switch 5 is provided piece between the metal tip 15 and the ring 17. in the Handle 2 is also a battery 3 and a protective diode 4 housed, which together with the switching elements located in the handle according to the circuit diagram according to FIG. 2 is interconnected.
Die Batterie und die Schutzdiode und auch der Tastschalter 5 können auch im Griff 1 untergebracht sein. In diesem Fall dient der Griff 2 lediglich der Handhabung des Prüfgerätes. The battery and the protective diode and also the push button switch 5 can can also be accommodated in handle 1. In this case, the handle 2 is only used Handling of the test device.
In F i g. 2 entsprechen die Anschlußstellen 14 und 15 den Metallspitzen der Prüfeinrichtung. Der Kaltleiter 18 ist mit der Antiparallelschaltung der Leuchtdioden 11 und 12 in Reihe geschaltet. Zu dieser Antiparallelschaltung in Reihe liegt ebenfalls der Tastschalter 5, der in Ruhestellung mit dem Kontakt 9 der Parallelleitung 10 verbunden ist Der Tastschalter 5 ist federnd ausgebildet und wird im Falle der Durchgangsprüfung betätigt, so daß ein Kontakt mit dem Anschluß 8 erfolgt, wodurch die Batterie 3 mit dem Plus-Pol 7 und dem Minus-Pol 6 sowie die Schutzdiode 4 in den Schaltkreis eingeschaltet werden. In Fig. 2, the connection points 14 and 15 correspond to the metal tips the test facility. The PTC thermistor 18 is connected to the anti-parallel connection of the light emitting diodes 11 and 12 connected in series. This anti-parallel connection is also in series the push button switch 5, which in the rest position with the contact 9 of the parallel line 10 The push button switch 5 is designed to be resilient and is used in the case of the continuity test operated so that contact is made with the terminal 8, whereby the battery 3 with the plus pole 7 and the minus pole 6 as well as the protective diode 4 in the circuit be switched on.
Die Prüfungseinrichtung arbeitet wie folgt: Für den Fall der Spannungsprüfung befindet sich der Tastschalter 5 in Normalstellung, so daß eine an den Enden 14 und 15 angelegte Spannung über den Kaltleiter und eine der beiden Leuchtdioden verläuft, die dadurch zum Aufleuchten angeregt wird Bei Wechselspannung leuchten beide Leuchtdioden, im Falle hoher Spannungen erwärmt sich der Kaltleiter über seine Curietemperatur hinaus, so daß sein Widerstand sprunghaft zunimmt Hierdurch werden die Leuchtdioden vor zu hohen Spannungen geschützt Im Falle der Stromdurchgangsprüfung wird der Tastschalter 5 umgeschaltet, so daß von der Batterie 3 ein Strom durch die zu prüfende Leitung geleitet wird. The test facility works as follows: In the event of a voltage test the push button switch 5 is in the normal position, so that one at the ends 14 and 15 applied voltage across the PTC thermistor and one of the two light-emitting diodes runs, which is stimulated to light up. With alternating voltage, both light-emitting diodes light up, in the case of high voltages, the PTC thermistor heats up above its Curie temperature addition, so that its resistance increases by leaps and bounds. This causes the light-emitting diodes Protected from excessively high voltages In the case of the continuity test, the pushbutton switch 5 switched, so that from the battery 3 a current through the line to be tested is directed.
In der Schaltung als Durchgangsprüfer könnte versehentlich eine Wechsel- oder Gleichspannung auch an den Metallspitzen 14 und 15 angelegt werden. Das könnte bei entsprechender Polarität einen Aufladestrom und damit eine Gasentwicklung in bestimmten Batterie-Elementen erzeugen und bei gekapselter Ausführung zur Zerstörung führen. Bei der Prüfeinrichtung gemäß der Erfindung wird der zum Schutz der Leuchtdioden bereits vorhandene keramische Kaltleiter-Widerstand auch zum Schutz der Batterie ausgenutzt und hat damit eine kombinierte Wirkung, durch die die Gefahr der Zerstörung nahezu beseitigt wird, u. zw. deshalb nahezu, weil der Kaltleiter eine gewisse Zeitspanne benötigt, um durch Eigenerwärmung hochohmig zu werden. Hier wirkt die Schutzdiode 4, die in der Schutzschaltung der genannten Art eingebaut ist Als Batterien können sowohl Primär- als auch Sekundärelemente verwendet werden. Anstelle der Schutzdioden kann auch ein anderes Halbleiter-Schaltelement verwendet werden, wie z. B. ein Transistor oder ein Triac, sofern die gleiche Funktion gewährleistet ist In the circuit as a continuity tester, an alternating or DC voltage can also be applied to the metal tips 14 and 15. This may with appropriate polarity a charging current and thus a gas development in generate certain battery elements and, in the case of an encapsulated version, to destruction to lead. In the test device according to the invention is used to protect the light-emitting diodes Existing ceramic PTC resistor also to protect the battery exploited and thus has a combined effect through which the risk of destruction is almost eliminated, partly because the PTC thermistor has a certain period of time needed to become high resistance due to self-heating. This is where the protective diode works 4, which is built into the protective circuit of the type mentioned As batteries can both primary and secondary elements can be used. Instead of the protective diodes another semiconductor switching element can also be used, such as e.g. B. a transistor or a triac, provided that the same function is guaranteed
Claims (2)
Priority Applications (21)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2717826A DE2717826C2 (en) | 1977-04-21 | 1977-04-21 | Test device for displaying an electrical voltage and / or its polarity as well as the passage of current through an electrical conductor |
DE2734833A DE2734833C2 (en) | 1977-04-21 | 1977-08-02 | Test device for displaying an electrical voltage and / or its polarity as well as the passage of current through an electrical conductor |
DE2735374A DE2735374C2 (en) | 1977-04-21 | 1977-08-05 | Test device for displaying an electrical voltage and / or its polarity as well as the passage of current through an electrical conductor |
DE19772756830 DE2756830C3 (en) | 1977-04-21 | 1977-12-20 | Test device for displaying an electrical voltage and / or its polarity as well as the passage of current through an electrical conductor |
US05/895,960 US4210862A (en) | 1977-04-21 | 1978-04-13 | Test device for indicating an electric voltage and/or the polarity thereof, and the passage of current through an electric conductor |
AR271797A AR213041A1 (en) | 1977-04-21 | 1978-04-14 | TEST DEVICE FOR THE INDICATION OF AN ELECTRICAL VOLTAGE AND / OR ITS POLARITY AND FOR THE INDICATION OF THE PASSING OF CURRENT THROUGH AN ELECTRICAL CONDUCTOR |
FR7811359A FR2388281A1 (en) | 1977-04-21 | 1978-04-18 | CONTROL DEVICE FOR THE DISPLAY OF AN ELECTRIC VOLTAGE AND / OR ITS POLARITY AS WELL AS THE PASSAGE OF CURRENT IN AN ELECTRIC CONDUCTOR |
CA301,450A CA1101072A (en) | 1977-04-21 | 1978-04-19 | Electrical circuit test devices |
JP53046438A JPS6019460B2 (en) | 1977-04-21 | 1978-04-19 | Test equipment for indicating voltage, voltage polarity, and continuity of electrical conductors |
AU35298/78A AU517481B2 (en) | 1977-04-21 | 1978-04-20 | Electrical circuit test device |
DK172978A DK172978A (en) | 1977-04-21 | 1978-04-20 | CONTROL DEVICE FOR INDICATING AN ELECTRICAL VOLTAGE AND ITS POLARITY AND POWER PURPOSE THROUGH AN ELECTRICAL CONDUCTOR |
SE7804537A SE425270B (en) | 1977-04-21 | 1978-04-20 | TESTING DEVICE FOR INDICATING AN ELECTRIC VOLTAGE AND / OR ITS POLARITY AND OF CURRENT TRANSMISSION THROUGH AN ELECTRIC CONDUCTOR |
AT281778A AT367213B (en) | 1977-04-21 | 1978-04-20 | TEST DEVICE FOR INDICATING ELECTRICAL VOLTAGE |
IT22519/78A IT1094448B (en) | 1977-04-21 | 1978-04-20 | TEST DEVICE TO INDICATE AN ELECTRIC VOLTAGE AND / OR ITS POLARITY, AS WELL AS THE CURRENT PASSAGE IN AN ELECTRIC CONDUCTOR |
GB15591/78A GB1562578A (en) | 1977-04-21 | 1978-04-20 | Electrical circuit test devices |
LU79484A LU79484A1 (en) | 1977-04-21 | 1978-04-20 | TEST DEVICE TO DISPLAY AN ELECTRICAL VOLTAGE AND / OR ITS POLARITY AND THE CONTINUITY THROUGH AN ELECTRICAL CONDUCTOR |
NL7804231A NL7804231A (en) | 1977-04-21 | 1978-04-20 | TEST DEVICE FOR INDICATING AN ELECTRICAL VOLTAGE AND / OR THE POLARITY OF THIS VOLTAGE AND OF THE CURRENT TRANSIT THROUGH AN ELECTRICAL CONDUIT. |
BR7802489A BR7802489A (en) | 1977-04-21 | 1978-04-20 | PROOF INSTALLATION THE INDICATION OF AN ELECTRICAL VOLTAGE AND / OR ITS POLARITY, AS WELL AS THE CURRENT CIRCULATION THROUGH AN ELECTRICAL CONDUCTOR |
ZA00782274A ZA782274B (en) | 1977-04-21 | 1978-04-20 | Improvements in or relating to electrical circuit test devices |
ES469027A ES469027A1 (en) | 1977-04-21 | 1978-04-21 | Improvements in check devices to indicate an electrical tension, its polarity and the passage of current through an electrical conductor (Machine-translation by Google Translate, not legally binding) |
BE187009A BE866251A (en) | 1977-04-21 | 1978-04-21 | VERIFICATION DEVICE FOR THE INDICATION OF AN ELECTRICAL VOLTAGE AND / OR ITS POLARITY, AND OF THE PASSAGE OF A CURRENT |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2717826A DE2717826C2 (en) | 1977-04-21 | 1977-04-21 | Test device for displaying an electrical voltage and / or its polarity as well as the passage of current through an electrical conductor |
Publications (2)
Publication Number | Publication Date |
---|---|
DE2717826B1 true DE2717826B1 (en) | 1978-09-07 |
DE2717826C2 DE2717826C2 (en) | 1979-05-03 |
Family
ID=6006954
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE2717826A Expired DE2717826C2 (en) | 1977-04-21 | 1977-04-21 | Test device for displaying an electrical voltage and / or its polarity as well as the passage of current through an electrical conductor |
Country Status (3)
Country | Link |
---|---|
AU (1) | AU517481B2 (en) |
DE (1) | DE2717826C2 (en) |
ZA (1) | ZA782274B (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2846675A1 (en) * | 1978-10-26 | 1980-04-30 | Siemens Ag | TEST DEVICE FOR INDICATING AN ELECTRICAL VOLTAGE AND, IF NECESSARY, THEIR POLARITY |
DE3213749A1 (en) * | 1982-04-14 | 1983-11-03 | Siemens AG, 1000 Berlin und 8000 München | Circuit arrangement for lowering the input impedance of a two-terminal high-impedance test device |
DE3834183A1 (en) * | 1988-10-07 | 1990-04-12 | Asea Brown Boveri | ELECTRONIC MULTI-RANGE MEASURING DEVICE |
DE4002603A1 (en) * | 1990-01-30 | 1991-08-08 | Benning Elektrotechnik | Voltage tester with two test probes - has probes connected by single core cable and voltage measuring element and voltage indicator arranged in handles |
DE4119894A1 (en) * | 1991-06-17 | 1993-01-14 | Hubertus Schauerte | Two-pole voltage measuring device with two probes - has one probe mounted on separate holder and connected to measurement circuit housing e.g. via users body |
DE4302292A1 (en) * | 1993-01-28 | 1994-08-04 | Benning Elektrotechnik | Test device for the optional display of an electrical voltage or the passage of current through an electrical conductor |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AU585846B2 (en) * | 1985-01-24 | 1989-06-29 | Maurice Glover | Electrical parameter test unit |
-
1977
- 1977-04-21 DE DE2717826A patent/DE2717826C2/en not_active Expired
-
1978
- 1978-04-20 AU AU35298/78A patent/AU517481B2/en not_active Expired
- 1978-04-20 ZA ZA00782274A patent/ZA782274B/en unknown
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2846675A1 (en) * | 1978-10-26 | 1980-04-30 | Siemens Ag | TEST DEVICE FOR INDICATING AN ELECTRICAL VOLTAGE AND, IF NECESSARY, THEIR POLARITY |
EP0011711B1 (en) * | 1978-10-26 | 1983-07-13 | Siemens Aktiengesellschaft | Test device for the stepwise indication of a measurement voltage |
DE3213749A1 (en) * | 1982-04-14 | 1983-11-03 | Siemens AG, 1000 Berlin und 8000 München | Circuit arrangement for lowering the input impedance of a two-terminal high-impedance test device |
DE3834183A1 (en) * | 1988-10-07 | 1990-04-12 | Asea Brown Boveri | ELECTRONIC MULTI-RANGE MEASURING DEVICE |
DE4002603A1 (en) * | 1990-01-30 | 1991-08-08 | Benning Elektrotechnik | Voltage tester with two test probes - has probes connected by single core cable and voltage measuring element and voltage indicator arranged in handles |
DE4119894A1 (en) * | 1991-06-17 | 1993-01-14 | Hubertus Schauerte | Two-pole voltage measuring device with two probes - has one probe mounted on separate holder and connected to measurement circuit housing e.g. via users body |
DE4302292A1 (en) * | 1993-01-28 | 1994-08-04 | Benning Elektrotechnik | Test device for the optional display of an electrical voltage or the passage of current through an electrical conductor |
Also Published As
Publication number | Publication date |
---|---|
AU517481B2 (en) | 1981-08-06 |
DE2717826C2 (en) | 1979-05-03 |
ZA782274B (en) | 1979-04-25 |
AU3529878A (en) | 1979-10-25 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
B1 | Publication of the examined application without previous publication of unexamined application | ||
C2 | Grant after previous publication (2nd publication) |