Power Meter : Inline Peak Power Sensor MA24105A : Zero/Cal Menu
  
Zero/Cal Menu
Key Sequence: Zero/Cal
Zero/Cal Menu
Zero
On Off
With no power applied to the sensor, press this submenu key to toggle the setting to On. A message is displayed: Please remove RF input power and press ENTER.
When Enter is pressed, another message is displayed: Zeroing... Please wait at least 1 minute and 20 seconds. When the message is no longer displayed, the zeroing is complete.
Cal Factor
Press this submenu key to display the Cal Factor menu.
Please connect USB cable to sensor and wait...