Endress+Hauser Proline t-mass 65 PROFIBUS DA, Руководство по эксплуатации

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Installation Proline t-mass 65 PROFIBUS DP/PA
12 Hauser
4.2 Installation conditions
Note the following points:
• The thermal dispersion principle is very sensitive to disturbed flow conditions.
• Observe the recommended inlet and outlet requirements.
• Good engineering practice is necessary for the associated pipe work and installation.
• Ensure correct alignment and orientation of the sensor.
• Take measures to reduce or avoid condensation (e.g. install a condensation trap, thermal
insulation, etc.).
• The maximum permitted ambient temperatures
→
116 and the medium temperature
range
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116 must be observed.
• Install the transmitter in a shaded location or use a protective sun shield.
• For mechanical reasons, and in order to protect the pipe, it is advisable to support heavy
sensors.
4.2.1 Dimensions
The dimensions and installation lengths of the sensor and transmitter can be found in the
"Technical Information" for the device in question. This document can be downloaded as a
PDF file from www.endress.com. A list of the "Technical Information" documents available
can be found in the "Documentation" section on
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122.
4.2.2 System pressure and pulsating flow
Reciprocating pumps and some compressor systems can create strong changes in process
pressure that can induce spurious internal flow patterns and therefore cause additional mea-
surement error. These pressure pulses must be reduced by the appropriate measures:
• Use of expansion tanks
• Use of inlet expanders
• Relocate the flowmeter further downstream
In compressed air systems, it is recommended to mount the flowmeter after the filter, dryer
and buffer devices to avoid pulsations and oil/dirt contamination.
Do not mount the flowmeter directly after the compressor outlet.