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FGM 160 - Installation & Hook-Up Instructions
must be used. We will describe two methods, but there are numerous ways this can
be done.
One proven method is to use a
marking
band.
After
the
centerlines are marked and their
position verified, use the labeling
band to mark a line round the
pipe, placed at the first spot (spot
A), ref. Figure 15. Then, on the
other side of the pipe, measure
the distance to the second spot
(spot B). It is also a good idea to
mark another line around the
pipe at spot B, as this will help
when placing transducer holder
B.
Spot A
Figure 15: Marking a line around the pipe using a marking
band
A second and just as good a method
is to use a paper, the width of the
diameter of the pipe and length
equal to circumference. Attach the
paper to the pipe and verify that the
ends meet exactly. Take the paper
off the pipe and fold it in two. Mark
the fold, and reattach the paper to
the pipe. Spot A will then be were
the paper ends meet and spot B will
be were you marked the fold on the
other side of the pipe. See Figure 16
and Figure 17.
D
Paper
D
Spot A
Figure 16: Attach the paper around the pipe
Spot B
D
Spot A
D
πD
Figure 17: Fold the paper in two. Mark the fold. This will give you spot B.
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