Baker Hughes Panametrics PanaFlow LC, User Manual

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2.8 Installing the V series clamping
fixture and transducers
To install the V Series clamping fixture and transducers,
complete the following steps:
2.8.1 Installing the fixture
1. Position the half of the clamping fixture with the
threaded rods around the pipe, as shown in Figure 23
below. Orient the fixture in the 3 o’clock position on a
horizontal pipe.
2. Position the mating half of the fixture over the threaded
rods in the 9 o’clock position. Figure 23 below shows the
two mounted halves.
Figure 23: Mounting the two halves of the fixture
The two fixture halves have measuring scales; ensure that
the scales are on the same side of the fixture, so that both
zeros start at the same origin, as shown in Figure 24 below.
0 1 2 3 4
0 1 2 3 4
Figure 24: Fixture with scale origins properly aligned
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 25
on the next page. Do not use a cross tightening pattern
on the four installation nuts.
Figure 25: Installing nuts onto the fixture
2.8.2 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 26 below.
Figure 26: 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 27 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 27: Installing the first transducer
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