Multimeter

Details Multimeter Multimeter

2011-05-17

2011-05-17

Velez, Roberto (Department: 2858)

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Plural ranges, scales or registration rates

Reexamination Certificate

active

07944198

ABSTRACT:
A multimeter includes a switching circuit. The switching circuit includes a micro control unit (MCU), a first normally-open switch, a second normally-open switch, and an electronic switch. The first and second normally-open switches connect to the MCU. The MCU connects to the electronic switch. The electronic switch connects to a power control terminal of the multimeter. The MCU are operable to detect whether the first and second normally-open switches are both closed and accordingly control the electronic switch to turn on or off. The electronic switch outputs a control signal to the power control terminal of the multimeter to control the multimeter to power on or off.

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