ADS Environmental Services Model 4000 530017 A0 - Manual (Page 50)

Monitor and Sensor Installation 3-27
6. Identify the three pre-drilled holes at the top of the bracket, and
spot drill the manhole wall through the middle hole with a
drill.
7. Remove the bracket, and drill and mount an anchor bolt.
8. Secure the top of the bracket to the manhole wall with a
washer and 7/16-inch (11-mm) nut.
9. Push up on the bottom portion of the bracket until the
ultrasonic depth sensor portion of the bracket is level.
10. Hold the bracket firmly in place against the manhole wall.
11. Identify the three pre-drilled holes on the bottom of the
bracket, and spot drill the manhole wall through the middle
hole with a drill.
12. Rotate the bracket 90 °, and drill and mount an anchor bolt.
13. Secure the bottom of the bracket with a washer and 7/16-inch
(11-mm) anchor bolt.
14. Verify that the ultrasonic depth sensor portion of the bracket is
level. If it is slightly out of level, make horizontal adjustments
to the bottom portion of the bracket by moving it to the left or
right. The oval bottom mounting holes allow minor horizontal
adjustments.
15. Drill and mount an anchor bolt in one of the pre-drilled holes
at the top portion of the bracket for extra security.
16. Confirm that the ultrasonic depth sensor is level.
Mounting the Doppler Velocity and Pressure Depth
Sensors
Two special installation methods are available for mounting the
Doppler velocity and pressure depth sensors:
¾-band mount
½-band mount
Both mounts require almost identical installation methods. The
only significant differences are that the ¾-band mount allows the