3-8
1010PVNFM-3A
Section 3
9. Wrap the mylar spacing guide around the pipe so that the left edge is against the trans-
ducer edge mark (see “C” on previous page). Arrange so that one end overlaps the other by
at least three inches. Trim to fit if necessary,
but be sure not to trim at the overlapping
end in order to keep it square
.
10. Realign the left edge of the guide with the transducer edge mark. Line up both vertical
edges of the guide and ensuring that it is snug around the pipe; mark along the overlap-
ping edge.
11. Remove the Mylar spacing guide and lay it out on a flat surface. Either, measure the exact
distance halfway between the overlap edge and the mark at the overlap or fold the guide
from the overlap edge to the overlap mark and draw a line at the fold or half way point.
12. Reinstall the spacing guide; its left edge abutting the transducers edge mark on the pipe
and the overlapping edge in line with the dot (now a line) on the pipe (see “C” on previous
page). Tape it in this position on the pipe. Take the second transducer and place it against
the edge of the guide with its white dot centered on the center mark on the guide. Tempo-
rarily position the transducer (in the 3 o’clock position opposite the mounted transducer)
where it will be mounted. Ensure that this is a smooth area without any raised spots
(seams, etc.). While holding, mark a generous area around the transducer (with a pencil or
chalk) where it contacts the pipe. Remove the transducer and the mylar guide.
13. Prepare the area you marked by de-greasing the surface, if needed, and removing any grit,
corrosion, rust, loose paint or surface irregularities with the abrasive pipe conditioning
material provided.
14. Replace the mylar guide back in the same position it was in and retape it to the pipe.
Attach the EZ clamp to the transducer under the spring clip. Unscrew the knob until it’s at
the stop.
15. Apply a 1/8-inch continuous bead of couplant compound along the center (the long way) of
the contact surface of the transducer. Position this transducer on the center of the pipe
and aligned with the edge and center marks on the guide; with the cable connector facing
away from the other transducer.
16. While holding this transducer in-place, bring the chain around the pipe and attach the
closest cross-link onto the hook of the EZ clamp. Tighten the adjusting nut until the chain
is just snug around the pipe. Check to ensure that the chain is straight around the pipe
and that the transducer is contacting the pipe at the white dot which is just under the
front label. Ensure that there is equal space on either side of the dot between the edges of
the transducer and the pipe. Adjust if necessary. Tighten the chain but do not overtighten.
Ensure that the transducer did not move while tightening.
17. Connect the transducer cable, ensuring that you have observed the upstream/downstream
orientation in respect to the cable and the input jack on the flow computer. If this is a
dual-channel unit, make sure you are connecting the cables to the correct channel’s input
jacks. Repeat this procedure for the number index transducer.
