Universal oscillograph

Abstract

The invention provides a universal oscillograph, which comprises a shell, a processing CPU, a display LCD and buzzer, a current test part and a voltage test part; the processing CPU, the display LCD and buzzer are arranged in the shell; the current testing part is electrically connected with the processing CPU and used for measuring alternating current and direct current, and a clamp meter currentprobe is arranged on the current testing part; the voltage testing part is electrically connected with the processing CPU, is used for measuring alternating-current and direct-current voltages and isprovided with a meter pen; the root part of the meter pen is different from the root part of the clamp meter current probe, so that the root part of the meter pen and the root part of the clamp metercurrent probe clamp a corresponding object to be measured; the root part of the meter pen is different from the root part of the clamp meter current probe, so that the butt joint error of the root part of the meter pen and the root part of the clamp meter current probe can be effectively avoided, the physical isolation of current measurement and voltage measurement is achieved, and the protectionmaloperation caused by the gear error of the conventional universal meter is avoided.

Description

technical field [0001] The invention relates to the technical field of oscilloscopes, in particular to a universal oscilloscope. Background technique [0002] The multimeter touches the object under test through the test leads to measure the performance parameters of the object under test. In the prior art, when using a conventional multimeter to measure voltage, current and resistance, it is necessary to frequently switch the test position and replace the test pen jack. When the current gear, resistance gear or test lead hole is inserted incorrectly to measure the DC voltage, the DC system bus bar will be grounded. When the distributed capacitance discharge current of the bus bar to the ground reaches the current coil requirements, it will cause the tripping circuit to be connected and cause Accident tripping makes conventional multimeters prone to misoperation of protection. When the conventional multimeter tests the resistance, there is interference that leads to inaccur...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a universal oscilloscope, which solves the problems that conventional multimeters in the prior art are likely to cause protection malfunctions, have many steps in operation, are prone to errors, and have no waveform display function.

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