Chapter 2.
26
Model CTF878 Startup Guide
2.1.11.2
Mounting Transducers
Prepare the transducers for mounting as follows:
1.
Dispense a bead of CPL-16 couplant on the face of one transducer.
2.
Take another transducer and rub the two transducer faces against one another so that the couplant spreads out
on the entire face of each transducer.
Note:
The size of the bead of couplant dispensed on the first transducer should be enough, that in the end, there is
a thin homogeneous coat of couplant on the faces of both transducers.
3.
Repeat these steps with the two remaining transducers.
If a CFT-V clamping fixture is being used, refer to Figure 14 below for transducer orientation and complete the
following steps one transducer at a time. If a CFT-PI clamping fixture is installed, refer to Figure 7 on page 20 for
transducer orientation and complete the following steps one transducer at a time.
Figure 14: Typical CFT-V Clamping Fixture / Transducer Setup (top view of pipe)
4.
Carefully position the transducer inside the clamping fixture's slider.
Note:
While doing this, make sure that none of the couplant gets wiped off of the transducer's face. The best way to
prevent this is to hold the transducer by the stem and keep its face parallel to the pipe wall at all times.
5.
While holding the transducer against the back of the slider and parallel to the pipe wall, tighten it down until it is
in contact with the pipe wall.
6.
Apply a finger-tight torque until the transducer stops moving inside the slider.
CAUTION!
If excessive torque is applied, the face of the transducer may be damaged.
7.
Repeat steps 4 through 6 for the remaining three transducers.
UPSTREAM
UPSTREAM
DOWNSTREAM
DOWNSTREAM
CLAMPING
FIXTURE
FLOW
TAG PATH
TRANSDUCER
SPACING
EXTERNAL GROUND
FOR CE MARK COMPLIANCE
RECEIVER
TRANSMITTER
TRANSMITTER
RECEIVER
Summary of Contents for CTF878
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