Voltcraft digital multimeters vc 830850870880 voltcraft vc880 the voltcraft vc 880 digital multimeter is a sturdy reliable practical rms industrial multimeter that is safe for the user this professional multimeter has a patented casing construction that allows it to be opened for changing the battery and fuses only when the device has been disconnected from all measuring leads the patented casing allows it to open for changing the battery and fuse only when the device has been disconn