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Short circuit current calibration circuit of spark test device

A short-circuit current and spark test technology, applied in the direction of measuring devices, measuring electrical variables, instruments, etc., can solve the problems of step size, poor precision, and insufficient fineness of short-circuit current calibration, and achieve the effect of improving accuracy and shortening step length

Inactive Publication Date: 2017-04-26
重庆麦驰信息技术有限公司
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Problems solved by technology

[0006] The purpose of the present invention is to provide a short-circuit current calibration circuit of a spark test device, which is used to overcome the short-circuit current calibration parameters provided by the short-circuit current calibration circuit in the prior art, and the step size between each short-circuit current calibration parameter is relatively small. Large, resulting in the calibration of the short-circuit current is not fine enough, the problem of poor accuracy

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  • Short circuit current calibration circuit of spark test device

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Embodiment Construction

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0026] The core of the invention is to provide a short-circuit current calibration circuit of a spark test device.

[0027] In order to enable those skilled in the art to better understand the solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0028] figure 2 A structural diagram corresponding to a short-circuit current ca...

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Abstract

The invention discloses a short circuit current calibration circuit of a spark test device. The circuit comprises a calibration selection switch connected to a calibration power supply and a calibration parameter selection circuit connected to the calibration selection switch. The calibration parameter selection circuit comprises N calibration resistors which are connected to contact points of the calibration selection switch respectively. A calibration switch is connected to each calibration resistor. Two ends of the calibration switch are taken as calibration current output terminals. And the N is greater than 4. Compared to the prior art, in an embodiment of the invention, more short circuit current calibration parameters can be provided so that a step length among the short circuit current calibration parameters is shortened and calibration precision is increased.

Description

technical field [0001] The invention relates to the technical field of spark test devices, in particular to a short-circuit current calibration circuit of the spark test device. Background technique [0002] With the vigorous development of mechanization, electrification and automation in the production process of industrial and mining enterprises such as petroleum, chemical and coal mines, the explosion-proof problems of electrical equipment used in explosive hazardous environments have become increasingly prominent. Intrinsically safe electrical equipment has many unique advantages compared to other types of explosion-proof electrical equipment because it guarantees explosion-proof on the electrical parameters of the circuit. Therefore, monitoring instruments, communication and automatic Control and other aspects have been increasingly widely used. [0003] The test of the safety performance of intrinsically safe electrical equipment is usually carried out on the spark te...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R35/00
CPCG01R35/005
Inventor 朱启陆钟守艮
Owner 重庆麦驰信息技术有限公司
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