Measurement Modes in the Main Menu
35
Fig. 36: 4 Pa Test
How to perform the 4 Pa Pressure Test:
4.
Switch on appliance and all air conditioning
(fan, dryer) with maximum power.
5.
Open an outside window or a door to the
reference room and test proper operation of
the appliance, ensure that there are no back-
draft conditions.
6.
Position the reference capillary hose: Lead the
hose outside through a window seal or into the
stairways through the door rebate or the key-
hole.
NOTE!
Especially on stormy days, the stairways may be
a stable reference room.
If the stairways are used as reference room, all
windows, doors, cellar doors and trap doors have
to be closed.
Fig. 37: Pressure profile during the 4 Pa
Test
The second capillary hose will stay uncut in the
fireplace room.
7.
Press „P
D
=0“ to zero the pressure sensor.
8.
Press "Start measurement" to start the 4 PA
Test.
The DC 410
FLOW
will now record the pressure
profile for 4 minutes.
9.
Open the window/door for about 30 seconds,
so that the zero line can be registered.
10.
Close the window/door for about 30 seconds,
control underpressure.
11.
Open the window/door for about 30 seconds,
the zero line should be reached again.
12.
Close the window/door for about 30 seconds,
control underpressure.
13.
Open the window/door for about 30 seconds,
the zero line should be reached again.
14.
Close the window/door for about 30 seconds,
control underpressure.
For a better orientation, there are auxiliary lines in
the diagram every 30 seconds. After a maximum
of 4 minutes, the measurement will stop automati-
cally.
