ACS-CONTROL-SYSTEM GmbH l Lauterbachstr. 57 l D-84307 Eggenfelden l www.acs-controlsystem.de l [email protected]
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3 Installation
The correct function of the device within the specific technical data can only be guaranteed, if
the permitted process and environmental temperatures (see chapter „Technical data“) will not be
exceeded.
3.1 Installation place
The installation of the device at locations where high pressure blows can occur should be avoided.
At a pressure measurement in gases, the device should be installed above the tapping point, so that
the condensate can flow into the process.
At a pressure measurement in steams, the device should be installed after a siphon and a shut-off
device below the tapping point.
The siphon reduces the temperature to almost ambient temperature.
Fill the siphon with fluid before commissioning.
At a pressure measurement in liquids, the device should be installed after a shut-off device below or
at the same level as the tapping point.
At a filling level measurement in liquids, the device should be installed below the lowest measuring
point. Do not mount the device in the fill flow, in the suction area of a pump, in the tank outlet or at
a point in the container which could be affected by pressure pulses from an agitator. Calibration and
functional test can be carried out more easily if you mount the device after a shut-off device.
The installation position can have an influence on the measuring result of the kind of a zero value shift
because of the deadweight of the measuring diaphragm. The correction of this deviation at the device
is not possible.
3.2 Process and environmental temperature
The installation of the device should be made if possible at temperature calmed places to get a reliable
measuring result.
Strong temperature steps, e.g. at filling of a hot liquid into a cold system, can produce a short-time
higher measuring signal deviation.
At high process temperatures a heat transfer to the terminal enclosure can be reduced by isolation of
the medium carrying part of the plant.
At underrun of the dew point, e.g. cold process medium at high environmental temperature, there
is the possibility of condensate formation within the pressure measuring sensor, which can lead to
increased measurement deviations resp. malfunctions.
These deviations are fully reversible by drying the condensate.
The use of a device with a strain gauge pressure measuring sensor is recommended.
3.3 Installation notes
Drive the system pressure free prior installation resp. deinstallation of the sensor.
The protective cap, which is attached at the diaphragm, must only be removed immediately before the
installation.
The diaphragm must not be point loaded, because this can lead to diaphragm damage.
The installation of the device into a closed off completely with process liquid filled connection can lead
to destruction of the measuring diaphragm. The reduction of the volume of the liquid at screw-in leads
to a very high pressure boosting, which can exceed the permitted maximum value by a multiple. Thus,
before installation, the connection must be sufficiently emptied.
The screw-in of the thread process connection by using the terminal enclosure, the connection plug
resp. the connection cable is not permitted.
The tightening of the thread process connection may only be done at the hexagon by a suitable
spanner and with the maximum permitted torque strength (see chapter „Technical data“).
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