oscillograph

A device that records oscillations, as of an electric current and voltage.

An instrument for recording alternating-current wave-forms and for the study of electrical oscillations.

An apparatus for recording graphically the motions of oscillation of any structure or element as to frequency and magnitude. The element may carry a pen or tracing-point, while a paper, borne on a fixed support, is moved before the tracer as the latter oscillates; or the principle may be reversed: used to record the effect of trains on bridges, or of moving machinery in buildings, or the effect of earth-movements on structures.

a device for making a record of the wave forms of fluctuating .

An apparatus for recording or indicating alternating-current wave forms or other electrical oscillations, especially of voltages or currents; it usually consists of a galvanometer with strong field, in which the mass of the moving part is very small and frequency of vibration very high.

An instrument for measuring alternating or varying electric current in terms of current and voltage.

a device for making a record of the wave forms of fluctuating voltages or currents