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.