3 | Assembly
FISCHER Mess- und Regeltechnik GmbH
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BA_EN_MA15_ATEX
3 Assembly
3.1 Generalities
The instrument may only be installed and commissioned by specialized person-
nel familiar with the installation, commissioning and operation of this product.
Specialized personnel are persons who can assess the work they have been
assigned and recognize potential dangers by virtue of their specialized training,
their skills and experience and their knowledge of the pertinent standards.
WARNING
Mounting pressure transmitters
During assembly, observe the respective national and international guidelines
and safety regulations.
Only mount the unit to systems that are depressurized. Only ever operate the
unit within the permitted measuring range or below the maximum overload.
Fig. 5:
Shutoff valve.
The device is set ex-works for vertical installation, however any installation posi-
tion is possible.
To guarantee safe working conditions during installation and maintenance, suit-
able stop valves must be fitted in the system (see accessories). By means of
the manometer shutoff, the unit
• Can be depressurized or taken out of operation.
• Be disconnected from the power supply within the applicable system for re-
pairs or inspections.
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)
WARNING
Earth connection via the system earth
During assembly, ensure that the earth connection between the unit and the
system earth is ensured. The connection to the system earth is realised via the
process connection. Therefore, never use an insulated Teflon tape or similar.
Design the process connection acc. to EN 837 and use a suitable flat seal.
3.2.1 Measuring lines that need to be connected
The following points need to be observed when connecting the pressure line:
• To ensure there is no influence on the measured values, severe bends and
coils in the wire should be avoided.
• To prevent deposits, there should be a continuous incline or drop of at least
8%.
• When measuring steam pressure, a water bag-forming loop must be
provided due to the temperature (see accessories).
