Sensor Installation and Connection 5-21
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 the
AV|Gated Sensor, the AV|Max Sensor and 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:
Important: If the only sensor to be installed on the ring
is a single AV|Gated, AV|Max or Peak Combo, the sensor
should be at the 6:00 position and the crank should be
rotated left or right to the 10:00 or 2:00 position so as not
to interfere with the Upward Ultrasonic reading during
surcharge conditions.
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