Tokyo Keiki UFL-30, Installation & Operation Manual

Page: 36 / 166

I-2-9. Transducer Installation Procedure
CAUTION
Do not give a shock to the transducer.
The distance between transducers needs to be determined prior to transducer installation. Please
refer to section I-2-13 to determine this distance before proceeding with the steps described below for
installation
(1) Transducer Installation on Pipes Greater than 300mm in diameter
There are two transducer installation methods. One is the reflection method and the other is the
transmission method. Generally, the reflection method is applied to small pipe (less than
ø
2000mm)
while the transmission method is used for larger diameter pipes. However the method to be chosen
may also depend on signal strength based on the pipe material and/or flow conditions.
1-A. Reflection Method (V-method)
1-a-1. Wrap gauge paper around the pipe where you intend to
make the flow measurement as shown in Fig.1-2-9-1.
Make sure the paper is long enough to overlap and that
the overlapping edge is square. Gauge paper may be
ordered and included in the standard installation kit.
1-a-2. Mark the pipe on either side of the paper where it
overlaps (points "A" in Fig. 1-2-9-2).
1-a-3. Remove the paper from the pipe. Fold the paper in
half, aligning the mark with the square edge of the
paper. Crease and mark along the fold. Alternately,
you can measure half the distance between the
mark and the squared end and draw a line. In paper
has been previously similarly marked, skip to step
a-5.
Measure and confirm the circumference of the pipe.
1-a-4. Rewrap the paper around the pipe at the
intended flow measure point.
A
Fig. 1-2-9-2
1/2circle
Fig. 1-2-9-3
A
Fig. 1-2-9-1
Adjust both edges
Fig. 1-2-9-4
Fix gauge paper
using adhesive tape
I- 25