Gas Flow Analyzer
System Setup
4
4-7
To enter the breath detect threshold, follow these steps:
1.
Enter the settings screen from the setup menu.
2.
Use the
∧
and/or
∨
soft key to highlight the line labeled
LF BD THRESHOLD
to
adjust the low-flow threshold, or
HF BD THRESHOLD
to adjust the high-flow
threshold.
3.
Press the soft key below
MODIFY.
4.
Use the numeric keys to enter the barometric pressure in LPM.
5.
Press the soft key below
ENTER
to exit back to the menu options, or the
ESCAPE
soft key to cancel the change and return to menu options.
Inspiratory versus Expiratory Tidal Volumes
The VT PLUS HF measures tidal volume when performing ventilator measurements.
This option allows the user to choose between the expiratory or the inspiratory tidal
volume. The default setting is inspiratory.
Note:
This setting only applies when the bi-directional breath-detection mode is
selected.
To change between inspiratory and expiratory tidal volume, follow these steps:
1.
Enter the settings screen from the setup menu.
2.
Use the
∧
and/or
∨
soft key to highlight the line labeled
BI-DIR TIDAL VOL.
3.
Press the
MODIFY
soft key until the desired option is displayed.
4.
Press the
BACK
soft key to exit back to the setup menu options.
Zero Mode
All of the pressure and differential pressure (flow) sensors in the
VT PLUS HF
need to be
periodically “zeroed” or calibrated to a zero reference. This “zero” function can be set to
occur automatically at pre-determined intervals or only when the user requests the
function by pressing the key labeled
ZERO/7
. When a “zero” occurs, valves inside the
device open the sensors to ambient pressure and measure the zero value that will be
subtracted from future measurements. Note that no breath parameters will be calculated
for any breath in which a zero occurs. For this reason, it may be desirable to turn off
automatic zeroing for a short while during a critical test.
To turn automatic zeroing on or off, follow these steps:
1.
Enter the settings screen from the setup menu.
2.
Use the
∧
and/or
∨
soft key to highlight the line labeled
ZERO MODE.
3.
Press the
MODIFY
soft key until the desired option is displayed.
4.
Press the
BACK
soft key to exit back to the setup menu options.
Содержание VT Plus HF
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Страница 71: ...Gas Flow Analyzer 6 6 7 LEAK TEST REPORT Fluke Biomedical Corporation ...
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Страница 108: ...VT Plus HF Operators Manual 8 18 Figure 8 9A Stacked Volume Test screen Figure 8 9B Stacked Volume Test screen ...
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