ADS Environmental Services IETG FlowHawk QR 775012 A4 - Manual (Page 99)

3-40 IETG FlowHawk Manual
4. Mount the sensor onto the inside of the band with two M3 x
10mm countersink screws, making sure the tapered, stepped
end of the sensor faces the upstream edge of the ring (edge
opposite cable tie holes). If mounting holes do not exist on the
band at or near the desired mounting location for the sensor,
drill holes in the band using a 3mm drill bit.
5. Secure the sensor cables along the downstream edge of the
long end of the band according to the instructions in Securing
the Cables to the Band on page 3-43.
6. Make sure two pre-drilled holes are visible above the flow
surface on the short end of the band. Maneuver the band so
that the lowest hole is almost at the flow surface.
7. Mark the pipe wall through the lowest hole with a drill, and
install a M6 x 55-mm anchor bolt with a pneumatic drill.
8. Secure the band to the anchor bolt with a washer and nut.
9. Conform the band to the pipe wall around to the long end of
the band so that it is flush with the pipe wall.
10. Install a M6 x 55-mm anchor bolt through the pre-drilled hole
closest to the flow surface on the long end of the band, and
secure the band with a washer and nut.
11. Make sure the band and sensors are flush against the pipe wall
with no gaps, and conform the rest of the band to the pipe wall.
12. Install M6 x 55-mm anchor bolts, nuts and washers at the pre-
drilled hole at the short end of the band and at the pre-drilled
holes along the long end of the band (above the flow surface)
approximately every 305 to 610 mm to the top end of the band.
13. Measure the physical offset for the sensor by manually
measuring the depth of the flow from the bottom of the pipe to
the flow surface and then measuring the distance from the nose
(i.e., front end at the pipe surface) of the sensor to flow
surface. Subtract the second measurement from the initial
depth of flow to determine the physical offset.