ADS Environmental Services FlowAlert QR 775011 A2 - Manual (Page 43)

3-20 ADS FlowAlert Manual
 If necessary, temporarily clear away silt to install the ring.
Restore the silt after fully securing the ring (step 7).
 Make sure the ring is flat (flush) against the inside wall of
the pipe to avoid obstructing the flow or catching debris.
4. Expand the ring by turning the spreader mechanism nut
counter-clockwise with the crank handle or socket. Continue
tightening the ring until it fits securely and completely flush
against the pipe wall.
Warning: Avoid over-tightening the ring. This could
bend the crank assembly.
5. Restore any silt moved to its previous level, and confirm that
the pressure depth sensor is still above the silt level.
6. When the sensor is not located at the bottom of the pipe,
determine the physical offset for the pressure depth sensor by
measuring the vertical distance from the bottom of the sensor to
the bottom, center of the pipe.
Note: This value will be necessary when configuring the
monitor using the Profile software.
7. Secure the sensor cable from the ring to the future monitor
location in the manhole. Refer to page 3-36 for more
information.
Special Installations
A special installation involves installing the mounting hardware for
the pressure depth sensor directly to the pipe surface with anchor
bolts, without the use of spreader mechanisms or rings.