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INF-TN1FSH-E
(3) How to mount the sensor unit
Mount the sensor unit comprising of two sensors facing opposite to each other, keeping the spacing displayed after the
piping parameter setting is completed. See “2.2.3. Mounting the sensor” for details.
Note: Mount the sensor unit equipped with a temperature sensor on the upstream side.
If plastic piping is used, the absorber unit is not required. Skip the description of the absorber unit.
If metal piping is used, the absorber unit is required. Perform the operation in accordance with the description
of the absorber unit.
(1) Temporarily mount the sensor unit and absorber unit
on the retainer plate.
Mount the sensor unit on the side with the V-shaped
portion, and the absorber unit on the side without the
V-shaped portion.
In this procedure, fully fasten the screws of the
retainer plate so that the sensor unit and absorber
unit contact with the retainer plate as tightly as
possible.
(2) Before mounting the sensor unit to the frame, apply
silicon rubber evenly over the entire ultrasonic
transmission surface of the sensor unit and the
surface of the temperature sensor that is to contact
the pipe, being careful not to let air bubbles mix in.
Before mounting the absorber unit, apply silicon
rubber evenly over the entire installation surface of
the absorber unit.
(3) Loosen the butterfly nuts of the thread part of the
frame.
Place the notches of the retainer plate to the thread
parts of the frame, and make the retainer plate
contact tightly with the frame.
(4) Fix the retainer plate with the butterfly nuts.
Subsequently, fasten the cap screws so that the
sensor unit and absorber unit contact with the piping
tightly.
Retainer plate
Notch
Butterfly nut
Cap screw
V-shaped portion