3B Scientific Premium Franck-Hertz Experiment Heater (230 V, 50__60 Hz) - Manual (Page 4)

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Fig. 1 Schematic of set up for measuring the Franck-Hertz curve for mercury (C cathode, G grid, A collector electrode)
F
K
G A
E
X Y
+
-
E
F K
A
Fig. 2: Experiment set-up for Franck-Hertz tube with Hg filling
F
K
G A
E
+
-
E
F K
A
X Y
Fig. 3 Experiment set-up for Franck-Hertz tube with 2 digital voltmeters