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Mounting position
Measuring part of sensor (rotor for paddlewheel and pins for magmeter)
should be positioned at 12% of ID where, basing on insertion theory, average
velocity can be measured.
The reading accuracy of insertion fl ow sensors can be affected by:
• air bubbles;
• sediments;
• friction between shaft and bearings (only for paddlewheel).
In a horizontal pipe runs, the mounting position to get the best performances is
at a 45° angle (Fig. 3) to avoid air bubbles as well sediments. Vertical position
(Fig. 2) can be chosen in case air bubbles are not present. Do not mount the
sensor on the bottom of the pipe (Fig. 1) if sediments are likely. Do not mount
paddlewheel at 90° otherwise friction can affect measurement.
Installation in a vertical pipe runs can be done fi xing any orientation.
Upward fl ow is preferred to ensure full pipe.
Process connection
1. Lubricate the sensor O-rings
with a silicone lubricant. Do
not use any petroleum based
lubricant that may damage the
O-rings.
2. Lower the sensor into the fi tting
making sure the alignment tab is
seated in the fi tting notch.
3. Hand tighten the sensor cap.
Do not use any tool otherwise
cap and/or fi tting threads may be
damaged.
7
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