ADS Environmental Services IETG FlowHawk QR 775012 A4 - Manual (Page 91)

3-32 IETG FlowHawk Manual
7. Fully tighten 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.
8. Install an anchor bolt in the manhole wall just above the pipe
crown. Using an anchor cable tie, secure the Surface Combo
Sensor/Ultrasonic Depth Sensor cable. It can be further
secured up the manhole wall.
9. Restore any silt moved to its previous level, and confirm that
the Peak Combo Sensor is still above the silt level.
10. Measure the physical offsets for the sensors:
 Peak Combo Sensor/Slimline Peak Combo
Sensor Physical Offset Manually measure the depth
of the flow from the bottom of the pipe to the flow
surface, and then measure distance from the nose (i.e.,
front end) of the Peak Combo Sensor or Slimline Peak
Combo Sensor to the flow surface. Subtract the second
measurement from the initial depth of flow to determine
the physical offset.
Illustrating the method for determining the physical offset for a rotated Peak
Combo Sensor or Slimline Peak Combo Sensor at maximum 15 o off center