Instrument PM 2420 is a compact multi-range DVM of the so-called RAMP type. Characteristic of the RAMP principle is the simplicity of operation, which makes this DVM ideally suitable for use as a general purpose instrument. Operation is facilitated by the possibility of selecting all measuring ranges by means of a single knob. It is obvious that the combination of digital read-out system and monoknob range selection ensures fast and simple, yet accurate reading.