Function and Features 
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  The first way: press ,adjust cursor location through 
button, pressing    and will enable you to increase or decrease 
the setting frequency value. 
 
  The second way: press , adjust cursor location through 
button, adjust rotary knob    to change the setting 
frequency value. 
  The third way: press   button and numeric key(   to  ) to 
set frequency value 
3.4 Phase Angle Setup 
You can set the starting and stop phase angle within range of 0~360° by 
pressing (Shift)+  (Phase),VFD will display as below: 
 
 
 
 
 
Press numeric keys to set the starting phase angle and press to 
confirm.Then the VFD will indicate next operation to set stop phase. 
 
 
 
 
Press numeric keys to set the stop phase angle and press to confirm. 
3.5 Output On/Off Operation 
  button is used to control the output state of AC source. When 
  button is lit,.It indicates the output in on state.When output button is 
dark which means the output is turned off. 
Note: 
make sure you have connected AC source and test DUT very well, then press 
  button to minimize shock hazard. 
3.6 Switch the VFD display items 
Press button to change the VFD display of bottom line. 
Default VFD display:effective voltage,effective current,frequence 
Active power,power fator,output time 
 
 
 
 
Press to switch the display: effective voltage,effective current,frequence