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Instruction Manual Dräger P7-TD
10.2.2 Metal, multi-layer composite and PVC pipes
A stabilization period for temperature equalization amounting
to 10 min and a test time of 30 min must be complied with for
the tightness testing of drinking water installations using wa-
ter, which consist of metal, multi-layer composites and PVC
pipes. The test pressure is 1.1 MPa (11 bar). There can be
no drop in pressure during the test time and there can be no
recognizable leaks.
Connect the pressure sensor to the pipeline to be tested and
start the measurement.
Connect the external pump to the pipeline using a valve and
increase the pressure.
Start the stabilization phase.
The stabilization phase can be terminated manually and you
can switch to the measurement using
.
(CONTINUE)
The measuring device automatically switches to the meas-
urement at the end of the stabilization period.
The measurement can be terminated manually using
(CON-
.
TINUE)
The pressure at the beginning of the measurement, the cur-
rent pressure in the pipeline, the pressure difference and the
already elapsed time of the measurement period are shown
during the measurement.
At the end of the measurement or after manual termination, a switch to the result display
occurs and the documentation menu can be accessed.
10.2.3 PP, PE, PE-X and PB pipes and therefore, combined installations
The tightness test with water for PP, PE, PE-X and PB pipes and therefore, combined in-
stallations consisting of metal and multi-layer composite pipes includes a stabilization part
and a measurement part.
The stabilization part takes 30 minutes, the test pressure dur-
ing this time is 1.1 MPa (11.0 bar). The test pressure must be
maintained during these 30 minutes. After that, the test pres-
sure must be reduced to 0.55 MPa (5.5 bar). A test time of
120 minutes must be adhered to with the reduced pressure.
Leaks cannot be identified at any location in the system being
tested and the test pressure must remain constant during the
test time.
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