4 The Main Menu 
127 
 
The Home Care display shows the Mode, the Exhale Volume and the Total Rate.  
It is designed primarily for the simplest kind of monitoring.  If you want to change 
settings or view ventilator information, proceed to the Main menu display.   
To switch to any display: 
1.  Select and press the Menu option on the Main screen to view the Main Menu. 
2.  Select Display. 
3.  The Display menu pop up window appears. Select the display you require 
and press the Control Knob. 
O.V.T. 
The O.V.T. (Operational Verification Test) tests the patient circuit and the alarm 
sound.  It must be performed every time a new circuit is connected.  
In Monitor and Home Care displays you can access the O.V.T only through the 
Main menu. In the Main screen you can activate the O.V.T from the O.V.T option 
on the screen.  
For a further description of the O.V.T. option see page 60. 
MAINTENANCE 
The Maintenance screen is described with maintenance procedures in Chapter  7.