April 2009
3-16
Installing the Dampening Material, Transducers and Fixtures
Installing the Transducers
1.
Apply a bead of couplant 6 mm (0.25 in.) wide along the
entire length of each transducer face, as shown in Figure 3-10
below.
Figure 3-10: Couplant on Transducer Face
Note:
Do not slide the transducer with couplant along the
surface of the pipe when mounting the transducer.
2.
Set the first mounting block (either left edge or right edge) at a
convenient number on the scale, such as 1 in. or 1 cm. Install
the first transducer with the BNC connector pointing away
from the center of the V block fixture. Hold down the
transducer mounting screw onto the insert, which in turn
applies pressure to the transducer. Use a handtight grip to set
the transducer in contact with the pipe, as shown in Figure 3-
11 below. Use a wrench to tighten the backing nut to prevent
loosening due to vibration and thermal expansion.
IMPORTANT:
Do not use a wrench or pliers on the screw.
Figure 3-11: Installing the First Transducer
