Measurement Modes in the Main Menu
37
Fig. 38: Diagram 4 Pa Test
Normally a diagram as shown in figure Fig. 38. will
appear. The pressure peaks in the diagram are
caused by the rapid movement of the window or
the door and therefore they are not relevant for
the interpretation of the diagram.
In Fig. 38 the pressure drop is about 2.0 Pa.
The reliability of the system is considered suffi-
cient, when the pressure drop caused by opening
and closing the window is less or equal to 4 Pa (8
Pa in the case of wood burning without surround-
ing air)
After the 4 Pa test is completed, "4 Pa Test" will
be marked by a tick mark in the main menu. Se-
lect "Print" from the main menu (see chapter 6.10)
to print out the readings and select "Save meas-
urements" (see chapter 6.11) to save them.
For the detailed procedure according to the Tech-
nical Rules for Gas Installations (TRGI), working
sheet G 625 (2009), it is necessary to replace the
fireplace by the Wöhler DP 600 (see manual
Wöhler DP 600).
Fig. 39: 4 Pa Test with
Wöhler DP 23
