CN2629048Y

CN2629048Y - AC or DC pincerlike galvanometer calibrating apparatus

Info

Publication number: CN2629048Y
Application number: CN 03259600
Authority: CN
Inventors: 吴汝良
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-07-09
Filing date: 2003-07-09
Publication date: 2004-07-28
Anticipated expiration: 2013-07-09

Abstract

The utility model directs to an AC or DC clamp-on ammeter calibration device consisting of an ammeter, an AC adjustable electric source, a DC adjustable electric source and a ring-shaped frame. A coil is wound outside the frame. Every location of a certain numbers of windings is provided with a tapping on the coil. The utility model has the advantages of a simple structure, a lower cost and a convenient use.

Description

Exchange or direct current clamp on amperemeter calibration equipment

Technical field

The utility model relates to a kind of verification instrument of clamp on amperemeter.

Background technology

Clamp on amperemeter also claims the card table, exchanging card table maximum range has～1000A, direct current card table maximum range has 600A, at present, have only the large test laboratory just to have the calibration equipment of alternating current-direct current card table, whether domestic consumer can't carry out verification, accurate after the long-term use of card table, will directly influence the accuracy of measuring.

Summary of the invention

The purpose of this utility model is exactly that low, simple interchange of a kind of cost or direct current clamp on amperemeter calibration equipment are provided in order to overcome the above problems.

The technical solution of the utility model is achieved like this: a kind of interchange or direct current clamp on amperemeter calibration equipment, be characterized in: it comprises reometer, alternating current-direct current adjustable current source and ring skeleton, be around with coil at skeleton, each is decided number of turn place and is equipped with tap on coil.

Because the utility model is made up of ac and dc current source and the coil that can adjust the number of turn, so formation simply, cost is low, and is easy to use.

Description of drawings

Fig. 1 is a wiring diagram of the present utility model.

Fig. 2 is user mode figure of the present utility model.

1, card arm 2, coil 3, reometer 4, handle 5, adjustable current source 6, reometer

Embodiment

Clamp on amperemeter is the magnetic flux of surveying on the card arm when measuring electric current, as the number of turn that is enclosed within this calibration equipment on the card arm is got 200 circles, the electric current that passes through is adjusted to 5A, then ampere turns is 1000 ampere-turns, be equivalent to a circle lead owing to pass the Ka Beikou of clamp on amperemeter during use, the card table fed the number of turn that 1000A could guarantee to block arm to multiply by the electric current number also was 1000 ampere-turns this moment, adopted the ampere turns same principle just can realize degree of accuracy with the big electric current card of little electric current verification table like this.

From Fig. 1 as seen, on the coil according to quantity range request be provided with a plurality of taps, the input power supply is for exchanging or the current source of the maximum 5A that direct current is adjustable, range is arranged is exchanging of 5A or DC ammeter to string between the terminals of coil and current source.

From Fig. 2 as seen, when verification, earlier handle 4 is pinched and to be inserted on the card arm 1 around the coil on the skeleton 2 after jaw is opened, connect the adjustable current source 5 of maximum 5A at coil input end, sealing in range between input end and current source is 5A reometer 6, accuracy as the 1000A shelves of need verification reometer 3, as long as the input current of this calibration equipment is transferred to 5A, coil tap is got 200 circles and is connect power end, the input end ampere turns is 5A * 200 circles=1000 ampere-turns like this, and the electric current number of clamp on amperemeter 3 just should be 1000 amperes.Connect adjustable 5A current source of interchange and alternating current ammeter at coil input end when exchanging the clamp on amperemeter verification, connect adjustable 5A current source of direct current and DC ammeter at coil input end during the verification of direct current clamp on amperemeter.

Claims

1, a kind of interchange or direct current clamp on amperemeter calibration equipment, it is characterized in that: it comprises reometer, alternating current-direct current adjustable current source and ring skeleton, is around with coil at skeleton, each is decided number of turn place and is equipped with tap on coil.