The Rotary Iron Meter is used for the measurement of alternating voltages in the frequency range from 40…72 Hz.
In this frequency range show practically independent of the curve shape the effective value.
Only in the case of extreme curve shapes (e.
g.
in case of phase control controls), the class accuracy is no longer observed.
The front frame, the front windscreen and the scale can be easily replaced.
This text is machine translated.