CN2109574U - Dg-4 electronic electricity tester - Google Patents

Abstract

The utility model relates to a DG-4 electronic electricity tester which is a multifunctional electricity testing tool. Especially under the condition of live circuitry, the tester can test the switching and breaking positions of fire wires, zero curves, testing electric appliances, electric wires and cables with the separation of an insulation layer. When used for testing, the tester is safe to be used. As the induction test without touching a charged body has the self-checking function, the utility model can illuminate and measure equipment components and semiconductor devices. The measuring range is 6 to 550 volt, and the tester can test high voltage out of the safe distance. The tester has 13 kinds of functions which can not be compared with old test pencils and has acoustic-optic display. The utility model is the replacement product of old test pencils.

Description

DG-4 electronic electricity tester

The invention belongs to a kind of multi-functional electrical testing tools of using.Particularly a kind of have under the electric situation at lead just can distinguish live wire, zero line and live wire across insulation course and what position to disconnect zero line at and whether open circuit, and lead is not when having electricity, and that checks whether circuit disconnect is suitable for testing power of alterating and direct current voltage in the 6V-550V with electrical testing tools.

The test pencil of cash and carry sales mainly contains test contact, metal spring, current-limiting resistance, neon tube and hand touched electrode and is composed in series on the market.When test contact contacts with tested metallic object, whether when staff contacts the examination electricity with the test pencil electrode, it is charged to measure metallic object, and when there was high potential in metallic object with respect to the earth, the neon tube starter in the test pencil indicated tested metallic object charged.This kind test pencil exists some problems in actual applications, luminance brightness as the neon tube starter is low, by day or light when strong, is difficult for observing charged situation, be easy to make zero during the direct engaged test of electricity measurer and electric conductor, live wire causes that by electricity measurer the short circuit person gets an electric shock, and causes danger.In commercial production and in many home appliance repairs, ubiquity the power lead that can judge connection to be had? the phenomenon that opens circuit in cable, the lead, right judgement be found out and be made to these phenomenons can't under cold situation, point out the position of opening circuit; In case after the energising, be present in opening circuit in a certain lead again, short circuit causes some accidents and components and parts to be burnt, this causes difficulty often for production line telecommunication millwright, debugging worker and brings wrong judgement, also is one for the consumers of household electrical appliance and expects in the problem that solves.

Task of the present invention is that a kind of improved multi-functional electrical testing tools of using will be provided.This electricity measurer needn't directly contact with electric conductor, only need just can measure the common electrical lamp driver across insulation course, commercial power circuit and the charged situation of rubber cable circuit, when electricity, just can distinguish out live wire, zero line at insulation epidermis outside surface, be that the live wire light emitting diode is bright, also send electroacoustic signal simultaneously.The zero line light emitting diode does not work does not have signal (or little bright).And can outside insulation course, measure live wire a part and whether open circuit, promptly that position, contact position does not work and does not have signal sound, and open circuit in the position thus in other words; When whether the survey zero line opens circuit, will measure live wire earlier, survey the metal part of zero line then with contact, light emitting diode does not work when opening circuit, and does not have signal sound, and light emitting diode is just bright when not opening circuit, and sends signal sound simultaneously.When not having electricity, can play the break-make situation of multimeter measuring circuit consumer.Ground short circuit, the effect of opening circuit can be found out the two ends of certain root line from more circuit.This utility model and former utility model, the patent No. are that 85203769 electronics electricity measurers are compared, also can logical and its insulation degree of inspection of test motor on the function, whether short circuit between the utmost point is organized mutually, open circuit; Whether the present invention can test out charging equipment and whether ground wire is housed contacts well with ground wire; Can also judge the both positive and negative polarity of direct supply and accumulator jar fast; Can also whether have at the outer testing high voltage electric wire of safe distance; Can also measure whether balance of three-phase alternating current electric load with this electricity measurer; This electricity measurer also has the function of the phase sequence of the alternating current that detects 380V; This electricity measurer has illumination functions, can replace electric torch to use, and is very convenient in electrical maintenance work; The electrician when maintenance circuit, Monitoring Line power-off condition effectively; In the test of electronic components such as a utmost point pipe, triode, controllable silicon, this electricity measurer uses also very convenient; This electricity measurer has self-checking function, can judge accurately whether electricity measurer self is intact, can effectively prevent to take place because of the accident of the bad error shock that causes of electricity measurer.

The mode that task of the present invention is finished is as follows: an end in contact of electricity measurer contact is on a wiring board, this plate is fixing is welded with two amplifier tubes, a switching tube (three pipes are the 3DG201 pipe) contacts the negative pole at the 1.5V battery with the other end of a light emitting diode (LED) and an integrated circuit HFC wiring board, the DC voltage of two batteries of cause is 3V, cause light emitting diode starter HFC integrated circuit to be connected, piezoelectric patches HTD sounding, luminance brightness and the sound surpass 2-3 times of former electricity measurer neon tube luminance brightness.Its principle of work is: the signal that receives from antenna directly is added on the base stage b of BGI, between the collector C of BGI and emitter e, amplify, signal after BG1 amplifies is added on the BG2 base stage b again, between the collector C of GB2 and emitter e, amplify, signal after finishing the secondary amplification is very strong, the base stage b that is added to BG3 again goes up (BG3 is used for switching tube), the emitter e of BG3 and collector c are obstructed when no signal, when emitter e and the collector c conducting of BG3 that be added with certain signal and voltage triggered, because a pin of light emitting diode and HFC integrated package is connected on the positive pole of battery, the emitter e of BG3 and collector c path after triggering, make another pin of light emitting diode and integrated package and the negative electrode channel of battery, signal receiving circuit of being formed and signal amplify display circuit and cause the light emitting diode light that is triggered like this, the circuit power of also having connected simultaneously sound integrated package makes piezoelectric patches HTD send signal sound, reached the effect that acousto-optic develops simultaneously, just can test out whether charged purpose across the insulation epidermis.The selected frequency of this invention is fixed, so the no frequency conversion utmost point.The present invention is easy to use, and test performance is strong, safe and reliable, can widespread usage in commercial production and home appliance repair.

Below in conjunction with the drawings and Examples structure invention is described in further detail.

Fig. 1 is the cut-open view of concrete structure of the present invention

Fig. 2, the 3rd, circuit theory diagrams of the present invention

In conjunction with Fig. 1, electricity measurer contact (1) with excellent conductive performance and physical strength is being pressed with ABS plastic (or vinyon) in the insulation crust (2) of horizontal moulding by casting, here the electricity measurer contact is the screwdriver shape, plays received signal effect double as screwdriver and uses.Shell (2) is continued to employ viewport and vocal hole during because of casting, can observe the luminance brightness of light emitting diode (7), and can hear the telecommunications bugle call that piezoelectric ceramic chip (11) sends, shell (2) is how much torch shapes, one end of electricity measurer contact (1) tightly be embedded in shell outstanding solid on, and be welded on the printed-wiring board (PWB) (3), P.e.c. is arranged in order to connect amplifier tube (4) on the wiring board, (5), switching tube (6), light emitting diode (7), be parallel with HFC music-integrating block (12) at the light-emitting diodes tube loop, the wiring board other end is connected on the negative pole of 1.5V battery (8), here use two 1.5V batteries (8), piezoelectric ceramic chip (11) is housed below battery, pin and pin of HFC integrated package at the positive pole of battery (8) welding light emitting diode (7), and have on metal plate (9) 2 1.8M resistance touched electrode in one's hands of series connection (10), current-limiting resistance (13), the wiring board that is electrically connected (3), battery (8) is installed in the geometric form torch shell (2), adopt this fit, be beneficial to and electrically contact well, circuit structure is compact to reduce cost, because metal plate elastic pressure makes from electricity measurer contact (1), wiring board (3), form reliable and stable electrical connection between battery (8) and the hand touched electrode (10).

During operation, the insulation course epidermis of electricity measurer contact (1) with tested wire, power lead and leader cable line contacted, amplify the principle that shows the electroacoustic circuit according to signal receiving circuit and signal, under charged situation, during the testing power supply line, be that the live wire light emitting diode is just bright, sending the telecommunications bugle call simultaneously and be the zero line light emitting diode does not work and does not have the telecommunications bugle call to send,, open circuit the test contact contact position as the live wire somewhere, light emitting diode does not just work, do not have the telecommunications bugle call to send yet, enable to find the fault in the circuit, in time deal with.When test, the lead of good insulation preformance is in order to improve measurement sensitivity, need to test accurately, because transistor has only the reverse voltage about 60V with finger contact electrode (10), during the use test instrument, not with electricity measurer contact (1) directly and electrified body contact.＜550V contact does not have dangerous yet.

Claims (3)

1, examination electrical testing tools that is composed in series by plastic casing (2) (shell is how much torch shapes) test contact (1) circuit board (3) current-limiting resistance (10) metal plate (9) and hand touched electrode (10),

It is characterized in that: by electricity measurer contact (1) and hand touched electrode (10), form signal, receiving loop partly reaches by wiring board or integrated package (3) (12), triode (4) (5) (6), luminotron (7), battery (8) is formed signal and is amplified, show and electroacoustic signal (12) electric test device that can test at the wire insulation exocuticle partly that two kinds of resolution element and integrated circuit are arranged.

2,, it is characterized in that luminotron is a light emitting diode as claims 1 described electric test device.

3, as claims 1 its key character of described electric test device is, electroacoustic is partly formed for sound circuit integrated package and piezoelectric ceramic piece sound-producing device.

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