Chapter 1. Installation
1-13
DigitalFlow™ GC868 Startup Guide (1 and 2-Channel)
2.
Tightly wrap the layout wrap once around the entire pipe and line up the edges.
Using the wrap as a template guide for marks, mark scribe lines around the
entire diameter of the pipe, as shown in Figure 1-12 below.
Figure 1-12: Marking Circumferential Lines on the Pipe
3.
Line up the zero scale of the layout tape at the desired location of the first
transducer. (For a typical installation, this point will be the 3 o’clock position on a
horizontal pipe.) Mark each of the two circumferential lines at the zero point.
Connect each of these marks using a straight edge (for example, the edge of the
layout tape) as shown in Figure 1-13 below.
Figure 1-13: Marking the 3 o’Clock Position
4.
To find the coinciding point on the opposite side of the pipe (180° away from
each other), divide the measured circumference by 2 and measure this distance
along the circumferential lines from the zero point, as shown in Figure 1-14 below.
Place marks on both sides of the circumferential lines made with the layout wrap
and connect the marks.
Figure 1-14: Marking the 9 o’Clock Position
