Kongsberg Simrad SU90 Operator's Manual page 177

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
b Observe the
c Select the setting you want to use.
d Select
Activate Selected Setting
e Select
OK
4 Make the following preparations.
a On the
Main
b On the
Operation
to start pinging.
c On the
Setup
5 Select
Transducer
The
Transducer
presentation attempts to organize the elements in the same manner as in the physical
transducer. The transceiver boards are shown as "buttons". Select a transceiver
board to highlight the elements that are physically connected to the board.
6 Select
Reception Test
The reception test validates each single element in the transducer, and returns the
status using a simple colour code.
• : The transducer element is fully operational.
Green
• : The transducer element offers reduced performance.
Red
• : The transducer element is not working ("dead").
Black
For more information, observe the tooltip provided for each element rectangle.
7 Make sure that the number of unserviceable ("dead") elements does not degrade
the performance of the SU90 system.
A small number of unserviceable transducer elements are accepted, even for
operational use. This is regarded as "graceful degradation".
The SU90 system operates with 384 individual channels handled by 12 transceiver
boards. If a single channel fails during normal operation, you are not likely to detect
it. Even if several channels fail, you may not see it.
The detection of a faulty channel depends on the physical location of the relevant
transducer element. If faulty channels are grouped together on the transducer face,
this may cause a visible defect in the display presentation. If they are scattered,
381291/D
menu, select
User Settings
list.
Factory Settings
.
to apply your changes and close the
menu: Set to 1500 m.
Range
menu: Set
Tx Power
menu: Open the
BITE
to open the page.
page presents all the elements that are used in the transducer. The
to start an automatic test of the individual transducer elements.
Maintenance procedures
.
User Settings
to Maximum (or any other power rating)
(Built-In Test Equipment) dialog box.
dialog box.
175