Hierarchy classification:

1. top of the aat hierarchies
2. Objects Facet
3. Furnishings and Equipment (hierarchy name)
4. Measuring Devices (hierarchy name)
5. measuring devices (instruments)
6. [measuring devices for forces]
7. elemental forces measuring devices
8. electricity measuring devices

Anotations

Scope note:

Devices in which the variations in a fluctuating electrical quantity appear temporarily as a visible wave form on a display screen. These plot the relationship between these variations, with the horizontal axis normally being a function of time and the vertical axis the voltage generated by an input signal. The German physicist Ferdinand Braun developed the first cathode-ray oscilloscope in 1897. In general, these are considered the same instrument as an oscilloscope, except that the oscillograph may be capable of creating a permanent record of measurements, while the oscilloscope provides only visual feedback.