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Zeroing phase
3 sec
2 x
Select "Input"
Select "Parameter"
Select "Pres."
Select "Absolute"
Parameters
P
RESSURE
Note
The absolute pressure is determined in the measuring
procedure depicted to the side. The absolute pressure
results from
• Altitude pressure (metres above sea level)
This has an annual average at sea level of 1013 mbar. The
higher the location is above sea level, the lower the
pressure.
• Barometric pressure
This has an annual average independent of the altitude
1013 mbar. This pressure can fluctuate from the annual
average by approx. ±20 mbar depending on the weather
(see local barometer display).
• Differential pressure
This is the higher or lower pressure in the duct.
The entry of the absolute pressure (in hPa only; it is
impossible to switch to other units) has an effect on the
pressure-dependent measurement values. These are
automatically compensated by the pressure: for humidity
(g/kg, J/g), CO2 and in all thermal probes!
Enter the pressure as a parameter:
1 Connect the probe. Connect analyser box to control unit;
switch on control unit.
2 Change to the main menu with key
3 From Main menu – Input – Parameter – select Abs.
pressure menu.
4 Accept the current reading with key
"Absolute pressure" with the cursor keys.
5 With function key
to the menu "Set pitot tube factor" or with key
to the measurement menu.
or
Enter the absolute pressure
Main menu Input
E E n n d d
, an automatic branch is made
Current reading
comes into effect
for analyser box
.
or enter
back
E E n n d d
Set menu: "Pitot
tube factor"
79
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