USER MANUAL DM9600
MRU GmbH, D-74172 Neckarsulm
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7.8.
Performing 4 / 8 Pa-test (Option)
The 4 Pa test is used to determine the negative pressure limit in closed
rooms. 4 Pa for rooms with exhaust air systems (e.g. extractor hoods in
kitchens). 8 Pa for room-air-independent fireplaces.
A capillary tube must be connected to P1 and inserted through a win-
dow seal to the outside or through a door or keyhole in a stairwell.
The second capillary tube must be connected to the pressure connec-
tion P2 (if necessary, remove the fine draft tube beforehand) and left in
the closed room
Before starting the measurement,
wait until the pressure sensor is
ready.
Recording interval: 1 second,
Resolution: 0.1 Pa
Touch Duration (min) duration to
set the measurement time.
zero point
“:
The pressure sensor can
be zeroed if necessary.
Touch start to begin the measure-
ment.
The measurement can be displayed
as graphic view or as text view.
For switching you should press + /-
at the edge of the display or context
menu page.
The measurement can be stopped
either automatically or with the but-
ton accept.
