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Franck-Hertz Apparatus can be used alone for manual recording of the voltage-current curves or with an oscilloscope in XY mode for repeated sweeping of the accelerating voltage.

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The Franck-Hertz Apparatus can be used alone for manual recording of the voltage-current curves or with an oscilloscope in XY mode for repeated sweeping of the accelerating voltage. The built-in panel meters indicate the current and the three tube voltages. The current amplifier has four ranges from 10-5A to 10-8A for full-scale deflection. A switch allows the voltages on the control grid, the anode and the reverse bias electrode to be monitored in turn. This apparatus uses argon at room temperature, and up to five minima can be easily obtained with manual plotting. The argon tube is enclosed in a metal casing of the unit, which shields it from stray environmental voltages. Includes full operator’s manual.

Requires oscilloscope with XY function and connecting cords, available separately.