ADS Environmental Services FlowAlert QR 775011 A2 - Manual (Page 48)

Pressure Depth Sensor and Float Switch Installation 3-25
above the silt level and below the flow surface during minimum
flows.
 If silt is not present, locate the sensor on the band so it will
be at the bottom center of the pipe once installed.
 If silt is present, locate the sensor slightly up the long end
of the band so it will be above the silt level once installed.
4. Mount the sensor onto the inside of the band with two 4-40 x
5/16-inch countersink screws, making sure the pointed end of
the sensor faces the upstream edge of the ring (edge opposite
cable tie holes). If holes do not exist on the band at or near the
desired mounting location for the sensor or the sensor does not
have screw inserts, use two medium-sized cable ties to secure
the sensor to the ring. Crisscross the cable ties across the top of
the sensor and underneath the band.
5. Secure the sensor cable along the downstream edge of the long
end of the band according to the instructions on page 3-29.
6. Position the band in the pipe so that the sensor will remain
below the flow surface (even during minimum flows) and
above the silt level.
7. 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.
8. Mark the pipe wall through the lowest hole with a drill, and
install a ¼-inch x 2 ¼-inch anchor bolt with a pneumatic drill.
9. Secure the band to the anchor bolt with a washer and nut.
10. Conform the band to the pipe wall around to the long end of the
band so that it is flush with the pipe wall.
Note: Temporarily remove any silt preventing the band
from sitting flush against the bottom of the pipe.
11. Install a ¼-inch x 2 ¼-inch 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.