PURPOSE: To check the 60 Hz line voltage frequency.
DESCRIPTION: A set of reeds, all the same length, are weighted to resonate near 60 Hz. The reeds are driven by an electromagnet. Just plug the meter leads into the end of a power cord to check the line frequency. Use an oscillator for driving the meter at frequencies other than 60 Hz.
REFERENCES: (PIRA 3A60.50)
EQUIPMENT: Frahm's frequency meter, as photographed.
SETUP TIME: None.
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