Kongsberg Simrad CS90, Справочное руководство

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442700/A
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Illustration:
Read the noise value from the noise circle. Use the
mean value of the readouts at 0 degrees (straight up).
Procedure
1 Make sure that you have sufficient water depth
below the keel before you lower the transducer.
2 Lower the transducer to its bottom position.
3 Select the default settings.
a On the
Main
menu, select
User Settings
.
b Observe the
Factory Settings
list.
c Select the setting you want to use.
d Select
Activate Selected Setting
.
e Select
OK
to apply your changes and close the
User Settings
dialog box.
4 At the bottom of the display presentation, select a suitable presentation mode, and
activate the
Horizontal view.
5 Make the following preparations.
a On the
Main
menu: Set
Range
to 1500 m .
b On the
Operation
menu: Set
Tx Power
to Off .
c On the
Active
menu:
1 Set
Pulse Type
to CW Medium .
2 Set
Frequency
to the start frequency:70 kHz
3 Set
Vertical TX Sector
to Narrow .
4 Set
Noise Filter
to Off .
5 Set the
Bottom Filter Threshold
to Off .
d On the
Setup
menu: Select
Diagnostics
to open the dialog box.
6 Select
Noise
to open the page.
7 Establish a separate communication line with the bridge to verify the vessel speed
during the test.
8 Measure the flow noise versus the vessel speed.
a Ask the bridge to increase the vessel speed to the maximum permitted speed
for the hull unit.
b Wait until maximum speed has been obtained.
Maintenance procedures