Fluke Biomedical VT305 - Manual (Page 27)

Gas Flow Analyzer
Operation
13
Numerical Values
Push on the display to show the numerical values screen
in the display. See Figure 8. You can change one, two,
four, or six numerical values on each screen. You
configure individual values and units through the web
browser-based configurator. See the Product
Configuration section.
ATP Air
0.0
Flow
l/min
ATP Air
0.0
Flow
l/min
ATP Air
0.0
Flow
l/min
ATP Air
0.0
Flow
l/min
gyo020.eps
Figure 8. Numerical Values Screens
The Product measures the temperature of the gas in the
measurement chamber inside the Product. This
temperature is not the same as the gas temperature that
enters the Product. The heat of the gas changes due to
the heat inside the Product.
The Product calculates static compliance (Cstat) with this
formula:
Cstat =
V t
P plateau – PEEP
When no plateau pressure is available, the formula has a
divisor of zero. The Product will show “---“ in the display
when this happens.
Graphical Values
Push Δ on the display to show the measured curves in the
display. See Figure 9. You can change one or two
measured curves each screen. You configure individual
values and units through the online application. See the
Product Configuration section.
Flow l/min
Flow l/min
Flow l/min
Flow l/min
gyo021.eps
Figure 9. Measured Curves Screens
Filter
The display update period is 500 ms or two times each
second. The acquisition time of new measurements is
5 ms to 8 ms. Without the filter, the latest measured value
is shown in the display when the screen updates. Because
each measurement has some noise, use the filter to
average the values equally for a specified period of time.