ADS Environmental Services Model 4000 530017 A0 - Manual (Page 52)

Monitor and Sensor Installation 3-29
2. Determine which end of the band will be the long end (end
extending almost completely up one side of the pipe). For
cable routing purposes, ADS recommends reserving the left
side of the pipe (upstream from the manhole) for the long end
of the band.
Note: Position the edge of the band with the cable tie
holes (edge with small holes) facing downstream.
3. Determine the appropriate location on the band to mount the
Doppler velocity sensor, making sure the sensor will be both
above the silt level and below the flow surface during
minimum flows.
If silt is not present, locate the sensor on the band so it will
be at the bottom center of the pipe once installed.
If silt is present, locate the sensor slightly up the long end
of the band so it will be above the silt level once installed.
4. Mount the sensor onto the inside of the band with two 3 mm x
8 mm countersink screws, making sure the beveled end of the
sensor faces the upstream edge of the ring (edge opposite cable
tie holes). If holes do not exist on the band at or near the
desired mounting location for the sensor, drill holes in the band
using a 7/32-inch (3 mm) drill bit.
5. When applicable, mount the pressure depth sensor to the band
in the following way:
Mount the pressure depth sensor 2 inches (5 cm) to the left
of the Doppler velocity sensor. Make sure the sensor will
be underneath the flow once installed.
Secure the pressure depth sensor to the band using two 3-
mm × 8-mm countersink screws. If the sensor does not
have screw inserts, use two medium-sized cable ties to
secure the sensor to the ring. Crisscross the cable ties
across the top of the sensor and underneath the band.
Attach the dryer tube in the vertical position to the monitor
handle using cable ties. See illustration on page 3-16.