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Proline Prosonic Flow 91
Endress+Hauser
1
Safety instructions
1.1
Designated use
The measuring device described in these Operating Instructions is to be used only for measuring the
flow of liquids in closed pipes, e.g.:
• Ultra clean water with low conductivity
• Water, wastewater, etc.
As well as measuring the volume flow, the measuring system also always measures the sound
velocity of the fluid. In this way, you can distinguish between different fluids or monitor the fluid
quality.
Resulting from incorrect use or from use other than that designated the operational safety of the
measuring devices can be suspended. The manufacturer accepts no liability for damages resulting
from this.
1.2
Installation, commissioning, operation
Note the following points:
• Installation, connection to the electricity supply, commissioning and maintenance of the device
must be carried out by trained, qualified specialists authorized to perform such work by the
facility's owner-operator. The specialist must have read and understood these Operating
Instructions and must follow the instructions they contain.
• The device must be operated by persons authorized and trained by the plant operator. Strict
compliance with the instructions in these Operating Instructions is mandatory.
• Endress+Hauser is willing to assist in clarifying the chemical resistance properties of parts wetted
by special fluids, including fluids used for cleaning. However, small changes in temperature,
concentration or the degree of contamination in the process can result in changes to the chemical
resistance properties. For this reason, Endress+Hauser does not accept any responsibility with
regard to the corrosion resistance of materials wetted by fluids in a specific application. The user
is responsible for the choice of wetted materials with regard to their in-process resistance to
corrosion.
• If welding work is performed on the piping system, do not ground the welding appliance through
the flowmeter.
• The installer must ensure that the measuring system is correctly wired in accordance with the
wiring diagrams. The transmitter must be grounded, except in cases where special protective
measures have been taken (e.g. galvanically isolated power supply SELV or PELV).
• Always note the regulations applicable in your country to the operation, maintenance and repair
of electrical devices. Special instructions relating to the device can be found in the relevant
sections of the documentation.
1.3
Operational safety
Note the following points:
• The measuring device meets the general safety requirements according to EN 61010-1 and the
EMC requirements according to IEC/EN 61326 in addition to the NAMUR recommendations
NE 21, NE 43 and NE 53.
• When hot fluid passes through the measuring tube, the surface temperature of the housing
increases. In the case of the sensor, in particular, users should expect temperatures that can be
close to the fluid temperature. If the temperature of the fluid is high, implement sufficient
measures to prevent burning or scalding.
• The manufacturer reserves the right to modify technical data without prior notice. Your
Endress+Hauser distributor will supply you with current information and updates to these
Operating Instructions.
Safety instructions
5
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