ADS Environmental Services IETG FlowHawk QR 775012 A4 - Manual (Page 85)

3-26 IETG FlowHawk Manual
Installing the ring at least 305 millimeters upstream from the manhole invert
Keep the following in mind:
 Be sure to the mount the Surface Combo
Sensor/Ultrasonic Depth Sensor at the top (crown) of the
pipe and to mount the Peak Combo Sensor/Slimline Peak
Combo Sensor is as close as possible to the bottom center
of the pipe, above any silt present and below the flow
surface (during minimum flows).
Proper orientation of the ring with the sensors in the pipe with and without silt
present. Please note that the sensor mounting plate for the Surface Combo
Sensor/Ultrasonic Depth Sensor is centered at the crown of the pipe. The
crank spreader mechanism is offset to the side.