YSI ADV6600 - Manual (Page 78)

Section 5. Mounting and Installation
ADV6600
Y S I
Environmental
Page 68
compensate for limited magnetic disturbances, and, if possible, the calibration should be
performed with the ADV6600 in the mounting frame.
• Both the ADV sensor and the Water Quality sensors need to be submerged to make accurate
velocity measurements.
• Flow interference (caused by the mount, pilings, rocks, weeds, etc.) will affect velocity
measurements. For this reason, deployment location must be considered carefully to be sure that
the sampling area of the ADV is free from these disturbances for the entire deployment.
• The system can be deployed on the inside of a pipe but the Doppler sensor must be located
below the bottom of the pipe at least as far as it extends below the probe guard for proper
performance and to reduce flow interference.
• It is important to select a deployment site that is representative of the flow that you are trying to
measure. Environmental stability (i.e., not subject to massive changes in conditions) is
preferable but not required.
• If data will be collected in the internal memory of the ADV6600during an autonomous
deployment, the recorder must be enabled.
A few examples of good deployment conditions are:
1. Mounting the ADV6600 to a rigid aluminum post or pole that has been sunk into the bottom of
the water body with no ferrous objects nearby. The sonde must be deployed such that the entire
array of sensors will be submerged at all times.
2. Placing the ADV6600 in a piece of 6-inch PVC pipe that is suspended in the water with a
weight on the bottom of the pipe to minimize movement. Remember that the Doppler sensor
must extend below the bottom of the pipe.
3. Placing the ADV6600 in a piece of 6-inch PVC pipe that is securely mounted to a rigid post as
in the example (1) above. Again, remember that the Doppler sensor must extend below the
bottom of the pipe.
For any of the above common deployment methods, the ADV6600 can either be logging to internal
memory using on-board battery power or be logging to an on-site data collection platform (DCP)
that is also supplying power to the ADV6600.
5-1.1. Deploying Using the YSI 6650 Clamps
The ADV6600 is ideally supported by two YSI 6650 circular clamps attached at two locations along
the probe housing as shown in the picture below. Note that when ideally installed, the clamps fit
within the recessed grooves on the instrument.