Kongsberg Simrad EK80 Installation Manual page 262

Simrad EK80 Installation Manual
• The vessel is berthed or at sea.
In order to do this test, the ship must be "silent".
• The water must be as deep as possible. Recommended minimum depth is 100 metres.
• There must be no other vessels in the vicinity.
• The vessel must lie still in the water.
• As much machinery as possible must be turned off. It is particularly important to
turn off electrical motors, as well as cooling systems and hydraulic pumps that may
cause electric noise.
• To prevent interference, all other hydroacoustic instruments must be turned off.
Note
This test must be considered as indicative. With the vessel in port, the environmental
conditions are not satisfactory. In the shallow waters of the port, noise from other
vessels, dockyard workers or machinery will cause unreliable test results. If you do
this tests in a busy harbour, or with noise sources present, the sensitive receivers will
detect all the noise in the nearby waters.
Neither tools nor instruments are required.
Context
It is essential that the noise signature is as low as possible. Your EK80 must be set to
Passive mode.
Procedure
1 To select Passive mode, use the
dialog box.
a Open the
Operation
b Select
Normal Operation
c For the relevant transceiver channel, set
to Passive.
Mode
d Set
Pulse Duration
e Select
OK
Note
If you set
Mode
the echogram(s).
2 Enable the
Noise
a Open the
Display
b Select
Display Options
260
Normal Operation
menu.
.
to 1.024 ms.
to save the selected setting and close the dialog box.
to Passive, your EK80 will no longer provide any information in
tooltip.
menu.
to open the dialog box.
394149/D