Multi-functional measurement instrument with safety protection device

Abstract

The invention discloses a multi-functional instrument with a safety protection device, which comprises an upper casing, a lower casing and an instrument main body, wherein the upper casing and the lower casing are mutually clamped and connected to form a cavity body with a front opening and a back opening, the instrument main body is installed in the cavity body, and a multimeter input interface and a network line input interface are arranged on the instrument main body. The multi-functional instrument also comprises a safety protection device which is installed on the instrument main body ina removable way and is provided with two installation positions. When the safety protection device is positioned at a first installation position, the multimeter input interface is communicated with the outside, and the network line input interface is blocked; when the safety protection device is positioned at a second installation position, the network line input interface is communicated with the outside, and the multimeter input interface is blocked. The multi-functional measurement instrument with the safety protection device conforms to the relevant safety certification standard, preventspotential safety hazard existing in the use process effectively, prolongs the service life of the multi-functional instrument and enhances the use safety.

Description

Technical field [0001] The invention relates to a multifunctional measuring instrument, and more particularly to a multifunctional measuring instrument with a safety protection device. Background technique [0002] Ordinary digital multimeter, also known as digital multimeter, is a necessary instrument for the majority of electronic technicians and electronic enthusiasts to engage in electronic measurement and maintenance work. Common digital multimeters include desktop digital multimeters and portable digital multimeters. Portable (also known as hand-held) digital multimeters are favored by the majority of users because of their complete functions, strong versatility, low price, low power consumption, and easy portability. [0003] Ordinary digital multimeter refers to the use of discrete circuits to realize the functions of the multimeter. The functions it can realize are: measuring AC and DC voltage, measuring AC and DC current and measuring resistance. Some ordinary multimete...

AI Technical Summary

Problems solved by technology

In order to meet this standard, it usually leads to the increase of the volume of the multi-function instrument, which is not easy to carry

In addition, the various interfaces of the existing multifunctional measuring instruments are usually exposed outside the casing of the multifunctional measuring instrument, so that the multifunctional measuring instrument may The electrical clearance and creepage distance between the conductors of the multimeter change, especially the test lead jack of the multimeter is very close to the network cable interface nearby. If the electrical clearance and creepage distance between them change, it may cause the device or Fire between the device and the ground may damage the instrument and threaten personal safety, thus posing a safety hazard

For example, since the multi-function instrument usually has the function of measuring voltage, when it measures high voltage, because the metal part of the network cable interface near it is exposed, if the human body touches the interface, it is very easy to cause harm to the human body

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