Paneltronics Analog AC Frequency Meter-55-65 Hz – 289-029

Analog AC Frequency Meter – 55-65 Hz. Features: Window mount . Easy to read compatible scale plates . True RMS DC ammeters accurately read inverter modified square wave output (ABYC E-11.11.3.2.3.). DC ammeters can be installed on panelboards that are permanently connected to motors or generators (ABYC E-11.11.3.2.)