ADS Environmental Services IETG FlowHawk QR 775012 A4 - Manual (Page 80)

Sensor Installation and Connection 3-21
Although the spreader mechanism fits snugly against the inside of
the ring, the spreader mechanism may seem loose on the hex nuts.
Do not be concerned. The spreader mechanism will tighten once
the ring is installed and tightened inside the pipe. The following
picture displays how a properly assembled ring with the ultrasonic
depth sensor mounting plate should look.
Properly attached spreader mechanism (with Ultrasonic Depth Sensor
mounting plate on ring)
Mounting the Sensors to the Ring
The following sections provide instructions on mounting Peak
Combo Sensor and Slimline Peak Combo Sensor to the ring. To
ensure the most accurate flow data, standard pipe installations
require proper positioning of the sensors on the ring as well as in
the pipe. When facing upstream and viewing from the downstream
edge of the ring, the sensors should be mounted on the ring in the
following locations:
 Peak Combo Sensor and Slimline Peak Combo
Sensor Mount the sensor as close as possible to the six
o'clock position (bottom), provided it is mounted above the
level of any silt present at the bottom of the pipe. Any silt
covering the sensor could interfere with the sensor signals,
potentially producing inaccurate or erroneous readings. To
avoid silt, the sensor can be rotated as much as 15 degrees up