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5.3b The Single-Traverse Method - GCF
Note: The instructions in this section can also be used for a multiple-traverse method. However, you must use an
ODD number of traverses. The distance the signal travels from one side of the pipe wall to the opposite side of
the pipe wall is considered one traverse.
The procedure for mounting the GCF involves marking the pipe for the desired spacing, fastening the fixture to the
pipe and then mounting the transducers into the fixture.
You will need a level and marker or scribe to locate the transducers on the pipe.
1. Obtain the transducer spacing dimension S, as described in the programming section of the Startup Guide.
2. Be sure the location you have chosen for the installation has at least 10 pipe diameters of straight, undisturbed flow
upstream and 5 pipe diameters downstream of the measurement point.
3. Prepare the pipe where you intend to place the GCF by making sure it is clean and free of loose material. Sanding,
though usually not required, may be necessary to take off any high spots. Be careful to preserve the original
curvature of the pipe and not to eradicate the marks on the pipe.
4. Find the top of the pipe and use a level to draw a line parallel to the pipe's axis.
5. Make two marks on the line equal to the transducer spacing distance S, as calculated by the meter.
C-PT Ultrasonic Flow Transducer Installation Guide
Line
Spacing
Mark
Mark
Top of Pipe
Side View
Side View
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