FISCHER DA03 GKT/HLP, Operation Manual

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FISCHER Mess- und Regeltechnik GmbH Assembly | 3
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3 Assembly
3.1 General information
The device can be mounted in one of the following ways (see Assembly [
}
9] ):
1. Wall mounting
The device is designed for installation onto flat assembly plates. The unit is
equipped with a wall mounting plate for this mounting type.
2. Pipe assembly
The device is equipped with a special pipe assembly set and is suitable for
mounting to a 2" pipe (DN50).
3. Panel mounting
Panel mounting is available in two installation models.
– Panel mounting fittings (Type 1)
This variant is only suitable for models with a small measuring system
(Ø75) and a bayonet ring casing NG100.
– Panel installation with front ring (Type 2)
All models are suitable for this variant. A suitable steel construction
must be used to ensure that the front plate can bear the weight of the
DA03. This is possible e.g. by means of a combination with the wall or
pipe assembly.
At the factory, the device is calibrated for vertical installation, but the installation
position is arbitrary. For any installation positions that are not vertical, the zero-
point signal can be corrected via the installed offset correction.
To ensure safety during installation and maintenance, we recommend installing
a suitable shut-off valve on the system (see accessories).
3.2 Process connection
• By authorized and qualified specialized personnel only.
• The pipes need to be depressurized when the instrument is being connec-
ted.
• Appropriate steps must be taken to protect the device from pressure surges.
• Check that the device is suitable for the medium being measured.
• Maximum pressures must be observed (cf. Tech. data)
All supply lines are arranged so that there are no mechanical forces acting on
the device.
The pressure lines must be kept as short as possible and installed without any
tight bends to avoid delays.
The pressure lines must be installed at an inclination so that when fluids are
measured no air pockets are created or when measuring gases, no water pock-
ets are created. If the required inclination is not reached, water or air filters must
be installed at suitable places.
With liquid measuring media, the pressure lines must be vented [
}
21] .
If water is used as a measuring medium, the unit must be protected against
frost.
If the pressure sensing lines are already pressurised at the time of commission-
ing, zero-point control and adjustment cannot be performed. In such cases, the
device should be only connected to the mains without the pressure sensing
lines.
+
Fig. 8: Process connection
The process connections are marked on the unit with (+) and (-) symbols. The
pressure lines are to be mounted according to this marking.
Differential pressure
Higher pressure
lower pressure