ADS Environmental Services Model 4000 530017 A0 - Manual (Page 55)

3-32 ADS Model 4000 Manual
4. When applicable, mount the pressure depth sensor to the band
in the following way:
Mount the pressure depth sensor 2 inches 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.
5. Secure the sensor cables along the downstream edge of the
band according to the instructions in Securing the Cables to the
Ring (or Band) on page 3-42.
6. Place the band in the pipe upstream at least 12 inches (same
distance as ultrasonic depth sensor, when present) from the
manhole invert. Position the band on the left side of the pipe
so that the sensors will remain below the flow surface (during
minimum flows) and above the silt level.
7. Orient the band so that one of the pre-drilled anchor bolt holes
is just above the flow surface.
8. Spot drill the pipe wall through the hole, install an anchor bolt,
and secure the band to the anchor bolt with a washer and a
7/16-inch (11-mm) nut.
Note: Make sure the submerged portion of the band is
flush with the pipe wall. If it is not, remove the band and
conform the band to the pipe.
9. Install an anchor bolt below the flow surface 1 to 3 inches (25
to 75 mm) away from the Doppler velocity sensor on each
side. This will hold the sensor securely against the pipe wall
and prevent the end of the band from twisting in the flow or
catching debris.