2-3 
 
(7)  
If no menu is displayed on the screen, pressing it will enter the main menu. If there is a 
menu displayed on the screen, pressing it will close that menu. 
(8) Battery LED 
  On: when the battery is installed and the AC source is connected. 
  Off: when no battery is installed or the installed battery is malfunction, or no AC 
source is connected when the patient monitor is power off. 
  Flash: when the patient monitor operates on battery power. 
(9)  AC power LED 
It turns on when AC power is connected. 
(10)  Power On/Off LED 
It turns on when the patient monitor is on and turns off when the patient monitor is off. 
(11) Knob 
Rotate the Knob clockwise or anti-clockwise. With each click, the highlight jumps to the 
neighboring item. When you reach your desired item, press the Knob to select it.