Kongsberg Maritime AS
PUBLIC
KONGSBERG PROPRIETARY – see Statement of Proprietary Information
401925 / D / 2021-08-17 / Page 6 of 15
•
Transmit synchronisation
•
Sound velocity sensor
•
NMEA outputs
•
…
In the checklist enter OK for the interfaces that are configured and tested OK. For interfaces not
configured enter N/A.
2.3.3
Dimensional survey
A dimensional survey must be present for the HAT to be approved.
Note!
The accuracy requirements for the dimensional survey are listed in the EK80
installation manual and the EC150-3C installation manual.
Note!
Modest accuracy requirements apply when your EK80 system is only used to
investigate objects in the water column. When used for Acoustic Doppler current
profiler (ADCP) measurements the accuracy requirements are increased.
In the
Installation
menu, enter the lever arms and angular offsets for all the sensors.
2.3.4
Functional test of Echosounders
Note!
Make sure the transducers are in water when pinging is activated. Pinging in air may
damage the transducers. This is especially important to pay notice if the vessel has a
drop keel.
2.3.4.1
Normal operation
Activate one frequency at a time and start pinging. Verify that the echogram looks normal and
that the system detects the bottom at all frequencies.
If EC150-3C is part of the installation, also run this in echosounder mode.
Test the systems with both CW and LFM pulses, where applicable.
If the water is very shallow it might be necessary to reduce the pulse duration and power.
2.3.4.2
Transducer measurements
Measure the impedance and phase for all the echosounder transducers.
Note!
This section does not apply to the EC150-3C.
2.3.4.2.1
CW pulses
Make sure all frequencies are set to active and that CW is selected for all. Enter the
Diagnostics
-> TRANSDUCER
menu. Select one system at a time and verify that the impedances and phase
are according to acceptance criteria.
CW acceptance criteria: 60
Ω <
|Z|
<
95
Ω
and -30
° < φ <
30°.
