There’s hardly any piece of test equipment more fundamental than a volt ohm meter. Today you’re likely to have a digital one, but for most of history, these devices had real needle meters.

Voltage in both AC and DC ... so immediately there was the possibility of a multimeter with an impedance in the mega ohms rather than the kilo ohms. These meters could be hooked up to a circuit ...

Voltage is the pressure that forces ... When you check the continuity for a new fuse, the multimeter will read approximately zero Ohms of resistance. That means the fuse has continuity and is ...