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Is the multimeter protected across all measurement gears? Will the multimeter be damaged if a wrong measurement gear is selected?

The multimeter is protected by the fuse at current gear, it is also protected at voltage gear as it is able to detect voltage of 1000V and designed with internal resistance of 10MΩ. There is no fuse protecting the multimeter at resistance gear since voltage excitation source exits at resistance gear, the measured resistance is detected by detecting the current flowing through the measured resistance, if the voltage is measured at resistance gear, two voltage sources will crash, which may cause damage to the multimeter at resistance gear. Overload-protection circuit is also designed for the multimeter.

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