3:Operation
17
3.4.5
Stacked Volume
Total volume over a displayed number of inhalation cycles can be
displayed on the top line of the control module display with the
number of inhalation cycles displayed on the bottom line of the
display. Units of actual liters, indicated by “ATP S L”; standard liters,
indicated by “STP S L”; or liters at body temperature and pressure
saturated, indicated by
“BTPS S L” can be selected using the
DISPLAY UNITS key. See
Section 3.7
,
Display Information
, for
definitions of these units of measure. For the High Flow module air,
O
2
, and air/O
2
mixture can be selected using the GAS SELECT key.
For the Low Flow module air, O
2
, and N
2
O can be selected using the
GAS SELECT key.
NOTE
: A valid flow cycle must occur for this value to be displayed.
See
Section 3.6
,
Breathing Cycles and Trigger Levels
, for details.
3.4.6
Oxygen Concentration
When the oxygen sensor is attached to the High Flow module the
oxygen concentration “%O
2
” can be displayed on the top line of the
control module display. Oxygen concentration can also be displayed
on the bottom line of the display, see
Section 3.4.14
.
Daily calibrations need to be done on the oxygen sensor. See
Section 3.5.2
for instructions on oxygen sensor calibration.
NOTE
: The
symbol will appear on the display when the oxygen
cable is attached.
Measurements on Bottom Line of Display
The following parameters are displayed on the bottom line of the
display. The
Bottom line select
key
is used to scroll through
parameters by momentarily pressing and then releasing the key.
3.4.7
Low Pressure
Gauge pressure from the low-pressure port of the High Flow module
can be displayed on the bottom line of the control module display.
Select units of “cmH
2
O” or “mmHg” by pressing and holding the
DISPLAY UNITS key for at least three seconds.
For best results check the zero on the low pressure transducer before
measurements. See
Section 3.5.1
for instructions on zeroing the
pressure transducer.
