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3. Signal menu, 4-Pa-test
with:
ρ
v
∆p
p
act
S
ϑ
act
The absolute air pressure pcur can be set under the menu item Setup > Ab-
solute pressure. This setting is also used to determine volumes with Equati-
on (5.1) under Section 5.
When the temperature
temperature of the DC 100
inserted over its 2 m cable into the flow parallel to the Prandtl's tube. There
is then an automatic follow-up of the air density
sured temperature
the flow medium are between 100 °C and 250 °C, the QA sensor E 98 must
be used for the temperature measurements.
The ventilation loss ist measured with a special measuring mode that is ex-
plained in chapter 4.
e-Mail: mgkg@woehler.com
air density, approx. 1,29 kg/m
flow rate in m/s
differential pressure in Pa, measured with the
Prandtl's tube
absoltue air pressure, manual entry in the Setup
menu item (default 1013 hPa
pitot-factor (1.00 for Prandtl's tube; 0.93 for pitot
tube type S)
measured temperature
ϑ
of the measured air flow deviates from the ambient
act
, the combustion air temperature probe can be
PRO
ϑ
according to Equation (3.2). When the temperatures of
act
Wöhler DC 100
3
ρ
as a function of the mea-
http://www.woehler.com
PRO
55
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