Kongsberg Simrad EK80 Installation Manual page 276

Simrad EK80 Installation Manual
e Select
OK
3 Establish a separate communication line with the bridge to verify the vessel speed
during the test.
4 Measure the acoustic noise versus the vessel speed.
Start raw data recording.
Repeat the following cycle for each vessel speed:
a Ask the bridge to set the speed.
b Once the bridge reports that the speed has been obtained, select
toolbar.
c If possible, verify the vessel speed on the top bar.
d For each channel, place the cursor five different places on the echogram on the
right side of the event marker, and record the noise values.
e Calculate the average noise in each channel, and record it in the table.
(If you find it more convenient, type the data directly into the spreadsheet.)
f Ask the bridge to set the next speed.
Stop the recording.
5 When all the measurements have been made, type the data (speed and noise) into a
spreadsheet to create the curve.
6 Save the data using a unique file name that identifies context, date, time and vessel.
Attach the data file to the electronic copy of the test report.
7 Measure the flow noise versus the vessel speed.
For each channel:
a Start raw data recording.
b Ask the bridge to increase the vessel speed to maximum.
c Wait until maximum speed has been obtained.
d Ask the bridge to abruptly turn off all engine power and - if possible - change
the pitch of the propellers to zero.
e Read the vessel speed on the top bar.
f Place the cursor in the approximate centre of the echogram, and observe the
tooltip information.
g For every two knots the speed is reduced, read the noise.
(If you find it more convenient, type the data directly into the spreadsheet.)
h Fill in the result table.
i Stop the recording.
8 When all the measurements have been made, type the data (speed and noise) into a
spreadsheet to create the curve.
274
to save the selected setting and close the dialog box.
on the
Event
394149/D