User Manual

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Siem ens Differential pressure Sensor QBE61.3-DP.. CM1N1923en
Building Technologies 2014-10-22
Engineering notes
The QBE61.3-DP.. and all interconnected devices must be wired to the same G0/G-
(measuring neutral). Also refer to the Data Sheets of the devices to which the sensor is
connected.
The differential pressure at the sensor may never exceed the permissible overload on
one side (refer to “Type summary”).
High static pressure can destroy the sensor if it acts on only one side of the
measurement system. This can be prevented by using the following layout:
A...C Isolating valves
Mounting and installation notes
Mounting position: optional.
Medium temperatures above 85 °C (steam) or below -15 °C make it necessary to install
a water trap pipe between piping and sensor.
Connection "+" : higher pressure/ smaller vacuum.
Connection "-" : lower pressure/ higher vacuum.
When used for acquiring the differential pressure in liquids, the following must be noted:
· Mount the sensor below the level of pressure measurement
· Mount the sensor on a vibration-free surface
· System venting is mandatory
The differential pressure sensor is supplied with Mounting Instructions.
Disposal
The devices are considered electronics devices for disposal in terms of European
Directive 2012/19/EU and may not be disposed of as domestic waste.
· Dispose of the device via the channels provided for this purpose.
· Comply with all local and currently applicable laws and regulations.