ADS Environmental Services Model 3600 530002 A2 - Manual (Page 69)

4-36 ADS 3600 Flow Monitor O&M Manual
l Place the velocity sensor on the band surface that will face inside (or towards
the flow). The velocity cable should exit toward the edge of the band where
the small pre-drilled holes (which run the length of the band) are located.
l Line up the holes in the band with the screw holes on the bottom of the
velocity sensor.
l Attach the velocity sensor to the ring using the two 3 mm
×
8 mm countersink
screws. Tighten until the sensor is securely attached to the band.
Note: The following steps are for attaching the pressure sensor to the band.
Perform these steps as needed; not all sites require a pressure sensor.
The pressure sensor is mounted on the band in the same fashion as the velocity sensor.
l Mark a position two inches to the left of the velocity sensor. Be sure that the
marked position will place the sensor underneath the flow after installation.
l Secure the pressure sensor to the band using two 3 mm
×
8 mm countersink
screws. Tighten until the sensor is securely attached.
l If your pressure sensor does not have screw inserts, use two medium -size
cable ties to secure the pressure sensor to the ring. Crisscross the cable ties
across the top of the sensor and underneath the band.
Use the following steps to attach the sensor cables to the band.
l Run the cable from the pressure sensor up the backside of the band (the side
with pre-drilled holes along the edge) in the direction you intend to run the
cables.
l Repeat the above step for the velocity sensor cable, but run it on the outside
of the pressure cable.
l Attach the sensor cables to the ring by inserting a 100 mm (4 in.) cable tie into
the holes drilled through the backside of the band. Secure the cables with the
cable ties at every hole until the top of the band is reached. Leave enough
slack in the cable ties to allow the sensor cables to lie flat behind the band.
Remove all excess cable tie material.
Note : If there are no 10 mm (3/8 in.) holes present for anchoring the band to
the pipe wall, drill the holes every 30 cm (12 in.) along the length of the metal
band.
Installation
The 3/4-mount installation is the preferred method of velocity band installation.
This procedure involves securing the band on both sides of the pipe with anchor
bolts. This design keeps the ring flush and tight against the bottom of the pipe. It
will not be damaged or ripped from the wall as the depth of flow increases. The
limiting factor of this kind of installation is flow depth and silt.