Simrad ER60, Operator'S Manual

Page: 40 / 182

Simrad ER60 Operator manual
32
850-164692 / Rev.B
1 Move the reference target slowly around to record a
sufficient number of data points (>100) evenly distributed
inside the beam. Make sure that a reasonable number of
hits are made close to the center of the beam. This is
important in order to ensure a correct estimate for the Sa
correction parameter.
2 While moving the target you should keep the reference
target within the depth limits you entered in the
Record
dialogue.
3 While moving the target and recording of data points
stops, the measured TS value may be outside the limits
entered in the
Record dialogue.
4 Stop and restart recording as required by using the
Stop / Start command found in the Main menu. It is
recommended to stop collecting data if unwanted fish
echoes are entering into the depth window, and restart
again when disappeared
5 When you have finished data recording open the File
menu, choose Save As to open the Save As dialogue.
6 Choose the directory where you want the calibration file to
be saved, and enter a file name for your calibration file.
7 Click Save to finish.
The calibration program will now use two different models to fit
recorded data, a polynomial model and a beam model.
The Plot view will plot the model along with the recorded data
points. Blue circles indicate values below the model; red circles
indicate values above the model.
The green circles close to the centre axis indicate the points that
have been used when estimating the Sa Correction value.
In the View menu located on the menu bar you can control what
is shown in the Plot view. You can choose between results from
the polynomial model or the beam model. In the View menu you
can also choose the plot type for each of the two models. If you
choose the
Polar command you will see a polar plot from
“above”. The other plot types are cartesian showing a slice
through the model. You may toggle between the plot types using
the space bar on your keyboard.