User Manual

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Siemens Pressure sensors QBE2004-P... / QBE2104-P… A6V10434676_en--_b
Building Technologies 2017-12-01
Mechanical design
The pressure sensor consists of:
• Piezo-resistive measuring element integrated in the stainless steel case
• Pressure connection, female thread
7
/16-20 UNF
• PVC cable electrical connection, 1.5m
No changes or adjustments are possible.
Mounting notes
Mounting Instructions are enclosed with the sensor. Connection set FT-PZ1 is required
to connect the sensor to G ½ threaded systems (see "Accessories").The supplied
copper seal must be placed on the flange seat to ensure a leak-proof fit.
To provide for test measurements without leakage of the medium, it is strongly
recommended that an appropriate test adapter and shutoff device be fitted. The interior
tappets in the sensor threads open (or close) any existing SCHRADER fittings when
mounting (or dismounting).
The tapping point should be at the side, near the bottom of
the pipe. Do not measure the pressure from the top of the
pipe (where it may be affected by airlocks) or the bottom
(where it may be affected by dirt).
Always evacuate the system.
1909Z03
The tapping point should be at the top so that no condensate
reaches the sensor.
1909Z04
Disposal
The device is considered electrical and electronic equipment for disposal in terms of the
applicable European Directive and may not be disposed of as domestic garbage.
• Dispose of the device via the channels provided for this purpose.
• Comply with all local and currently applicable laws and regulations.
Pressure measurement
with liquids
Pressure measurement
with condensing gases