Simple universal meter

Abstract

The present invention provides a simple universal meter, and relates to an electrical measurement field. The simple universal meter comprises a meter head, a liquid crystal display screen, a red meter pen, a black meter pen, an HFE jack, input jacks, a measurement circuit, an intelligent gear circuit and a power switch. The intelligent gear circuit includes a diode, a single-chip microcomputer, a relay, a resistor, a power panel and a thermistor. The meter head of the simple universal meter is a high-sensitivity magneto-electric direct current meter; the power switch and the HFE jack are installed in order at left and right sides at the lower portion of the liquid crystal display screen; the simple universal meter is internally provided with the measurement circuit and the intelligent gear circuit; input jacks are arranged at the lower portion of the measurement circuit and the intelligent gear circuit; and when the red meter pen and the black meter pen are used, the red meter pen is inserted into the input jack with '+', and the black meter pen is inserted into the input jack with '-'. The simple universal meter does not need people to select gear, the operation is very rapid, the service life is prolonged, and the meter cannot be burned out caused by choosing a wrong gear.

Description

Technical field [0001] The invention relates to the field of electrical measurement, in particular to a simple multimeter. Background technique [0002] The simple multimeters currently in use on the market require manual adjustment of measurement items and ranges, which will be more troublesome in actual operation, and there will be frequent misuses that cause the meter to burn out, which is neither simple nor economical. Summary of the invention [0003] The purpose of the present invention is to provide a simple multimeter with simple structure, reasonable design and convenient use in view of the defects and deficiencies of the prior art. [0004] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is: it includes meter head, liquid crystal display, red test lead, black test lead, HFE socket, input socket, measurement circuit, intelligent gear selection circuit, power switch; intelligent gear selection circuit includes Diodes,...

AI Technical Summary

Problems solved by technology

[0002] The simple multimeters currently in use on the market need to manually adjust the measurement items and ranges, which will be troublesome in actual operation, and often cause the meter to be burned out due to incorrect use, which is neither simple nor economical.

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