Datex-Ohmeda Aestiva 7900 SmartVent, Technical Reference Manual

Page: 55 / 204

4a Tests and Calibration 4.X Software
1006-0453-000 05/04 4a-9
Figure 4-7 • Drive Gas menu item
4a.3.3.3 Heliox Mode
Aestiva machines can be configured to deliver Heliox. These machines should
have the Heliox Mode “On”. With the Heliox Mode On, the operator can
choose to turn the Heliox On or Off in the Setup/Calibration menu.
If the machine is not configured to deliver Heliox, the Heliox Mode should be
set to “Off”. With the Heliox Mode Off, the Setup/Calibration menu will not
include the Heliox option.
Figure 4-8 • Heliox Mode menu item
4a.3.3.4 V
E
Alarm Limits
The setting for V
E
Alarm Limits determines how the V
E
Alarm Limits are set:
• If V
E
Alarm Limits is set to User Adjustable, the user sets the limits on the
Alarm Settings menu.
• If V
E
Alarm Limits is set to Automatic, the ventilator software calculates the
high and low V
E
alarm limits and sets them to ±20% of the set V
E
. The user
is still able to change the limits through the Alarm Settings menu in the Main
Menu.