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

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Installation Proline t-mass 65 PROFIBUS DP
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3.2 Installation conditions
Note the following points:
• The thermal dispersion principle is very sensitive to low flow rates and 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.
• Avoid condensation forming around the transducers.
• Consider the nature of the gas or gas mixture (dryness, cleanliness, stability, fraction, etc.)
• The maximum permitted ambient temperatures (
→
Page 96) and the medium temperature
range (
→
Page 96) must be observed.
• If possible, locate the sensor to avoid extreme changes in ambient temperature and process
condititons.
• For mechanical reasons, and in order to protect the pipe, it is advisable to support heavy sensors.
3.2.1 Dimensions
All the dimensions and lengths of the sensor and transmitter are provided in the separate
documentation “Technical Information”.
3.2.2 Pipework requirements
Good construction practice should be followed at all times:
• Correct welding techniques
• Correctly sized gaskets
• Correctly aligned flanges and gaskets
• The use of seamless pipe immediately upstream of the flowmeter.
• The use of pipework with a matching internal diameter to that of the flowmeter to ensure that no
step disturbance greater than 1 mm (0.04 inch) can occur at the meter inlet or outlet
(3 mm (0.12 inch) for diameters > DN 200 (8")).
• As a general comment, anything that disturbs the smoothness of the internal pipe wall within the
dimensions stated below should be eliminated; the goal should be a smooth uninterrupted
internal surface.
For further information please refer to ISO 14511.
"
Caution!
Newly installed piping should be free of contaminants and particles to prevent damage to the sensing
elements.
a0005103
Butt welded joint
a0005104 a0005105 a0005106
Pipe diameter one is not equal pipe
diameter two
Incorrectly sized gaskets Incorrectly aligned flanges and gaskets
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