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9.3.6
Dual frequency
Dual frequency allows the unit to work at 50 Hz or at
60 Hz with an accuracy of constant load. The
frequency selection is done by means of switch S3.
R2 ....... Voltage adjust potentiometer 50 Hz
Allows to adjust the output voltage at 50 Hz.
R3 ....... Voltage adjust potentiometer 60 Hz
Allows to adjust the output voltage at 60 Hz.
S3 ....... Frequency selector switch (50 Hz/
60 Hz)
Allows to choose the frequency of the output
voltage: 50 Hz or 60 Hz.
The Dual frequency option is not
applicable for QES 60.
Stop
Auto
Start
S3
R2/R3
Changing the output frequency is
only allowed when the unit has
stopped.
After changing the output
frequency, adjust the output voltage
by means of potentiometers R2 or
R3 to the required value.