Chapter 1. Installation
1-11
DigitalFlow™ GC868 Startup Guide (1 and 2-Channel)
3.
Install the four nuts onto the threaded rods with the convex side of the nut facing
the fixture. Hand tighten the nuts on each V block evenly, as shown in Figure 1-8
on the next page. Do not use a cross tightening pattern on the four installation
nuts.
Figure 1-8: Installing Nuts onto the Fixture
1.4.4.2
Installing the
Transducers
1.
Apply a bead of coupling 6 mm (0.25 in.) wide along the entire length of each
transducer face, as shown in Figure 1-9 below.
Figure 1-9: 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 2 in. or 5 cm. Install the first transducer with the
BNC connector pointing away from the center of the V block fixture. Tighten the
transducer mounting thumbscrew onto the slider, 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 1-10 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 thumbscrew.
Figure 1-10: Installing the First Transducer
