ADS Environmental Services IETG FlowHawk QR 775012 A4 - Manual (Page 64)

Sensor Installation and Connection 3-5
 Flow Traveling at Least 0.3 Meters per Second Slower
flows enable debris to settle in the pipe, limiting the accuracy
of flow measurements.
 Higher Elevation than High Water Level that Occurs
in Wet Well at Downstream Pump Station Pipes that are
below the high water level of the pump station wet well could
experience frequent backup and surcharging. This will increase
sensor maintenance and possibly reduce data accuracy.
Pipe and Manhole Characteristics
The physical characteristics of the pipe affect the flow and
determine the procedure for installing the sensors. Consider the
following factors and perform the following activities when
installing the sensors and monitor:
 Sensor Installation Method Pipe size and shape determine
the installation method to employ for installing the sensors.
 Standard Installation Select this option to install
sensors in round pipes from 200 to 1219 mm in diameter.
Standard installations involve attaching sensors to an
adjustable stainless steel ring that mounts inside the pipe.
 Special Installation Select this option to install sensors
in non-round pipes or round pipes larger than 1219 mm in
diameter. Special installations involve attaching sensors
to steel bands secured to the inside of the pipe.
 Pipe Height and Width Measure and record the horizontal
and vertical pipe dimensions carefully. Inaccurate pipe
measurements—even slightly inaccurate measurements--can
skew and misrepresent flow data.