Specifications
Channel Master Operation Manual
page 44 RD Instruments
9.3 Installing the Channel Master on Site
The Channel Master must be mounted on a rigid structure in the channel,
such as a solid wall, pier, or pile. The mounting structure must be firm, sta-
ble, without settlement or displacement over time.
NOTE. In order to gain the maximum profiling range at a site, we
recommend the Channel Master be mounted near the middle of the water
depth at the mounting structure location. For a site with a significant
seasonal change of water level, the Channel Master may need to be
mounted at different elevations according to the seasonal water level
change.
The recommended mounting procedure is described below. A diver may be
needed for the installation work.
a. Assemble the mounting plate (see “Mounting Plate Assembly,” page
42).
b. Install the mounting fixture on the structure with four screws embedded
in or attached to the mounting base. See the “Mounting Plate Drawing,”
page 118 for the size and arrangement of the four screw holes.
NOTE. The four screws/bolts required to mount the base plate to your
structure are not provided by RD Instruments.
NOTE. For best results, select a mounting location so that the Channel
Master X-axis (direction from Beam 2 to Beam 1) is parallel to the channel
main flow direction (Figure 25, page 43).
c. Connect the I/O cable to the Channel Master. Attach the cable strain
relief.
d. Slide the Channel Master into the mounting fixture and secure the
Channel Master by using the provided four M6 socket head screws, lock
washers, and flat washers through the holes on the Channel Master
transducer head (see Figure 27, page 45).
e. Adjust the mounting fixture to make the Channel Master zero pitch and
roll or a desired lean pitch and zero roll.
f. Run the real-time program WinHADCP with the desired parameter set-
tings. Examine the acoustic backscattering intensity profile and look for
any obstacle to the acoustic beams, surface or bottom interference, or
side lobe effect. Adjust the Channel Master lean if needed. Also exam-
ine the velocity profile for reasonability.
g. Secure the cable by attaching it to the structure. Use a plastic tube to
protect the cable for permanent installations.