Metso 3300 Series, Manual

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MANUAL
Manual Series 3300 2. InstALLAtIon
Sensor (a) is mounted in a tank where it is intended to
control dosing via a pump. If the agitation in the tank
stops, the control loop is opened, and the dosage control
will fail. Control loop will also fail if the liquor level falls
below the sensor measuring head.
Sensor (b) is mounted in a horizontal pipe. If the flow is
too low or in case of no flow, air bubbles may occur or the
pipe may not be filled. Consequently, the sensor will be
measuring partially in air, giving a faulty reading.
Sensor (c) is installed where bubbles may occur due to lo-
cal boiling caused by the vacuum created by the liquor in
the long downstream pipe.
Sensor (d) is installed in a downstream pipe close to an
open ending. The pipe will never be filled and the sensor
will give a faulty reading.
Sensor (e) is installed in the suction side of a pump where
the pressure is low while the pump is running. Conse-
quently, air bubbles may be formed causing a faulty
reading.
Wrong mounting