Doc. P/N:
WSP-009-008
Version: V1.3
Issue Date: April 2014
Operator Manual
System Configuration
49
Wassp t
ransducer
t
emperature
If
Use WASSP Transducer
is selected, the WASSP application software will use temperature data from
this sensor. This information is shown adjacent to this option and will be reported in the “Surface
Temperature” window with any “Temperature offset” added to correct for any error in the external
temperature sensor.
7.2.4 Sensor
The
Sensor
tab provides a selection of motion compensation
options and corrections for sensor misalignment and time
delay. These settings should not be changed by the operator
outside of the commissioning process.
If roll correction is enabled and configured correctly and the
vessel is rolling less than 15°, the sonar picture should remain
on almost the same angle from ping to ping on reasonably flat ground. If the sonar picture rocks as
the vessel rolls, then the roll compensation setting is likely to be wrong or the motion sensor is not
being read by the WASSP system.
h
eadinG
and
p
itch
O
ffsets
The
Heading and Pitch Offsets
will correct for transducer and motion sensor misalignment.
Gps t
ime
d
elay
All GPS positioning systems have some delay from receipt of the satellite signal to output of the
correction data. When a Furuno SC-30 is used as the source of position data, this delay is approximately
1.0 seconds and equates to an error of 5m in the location of an object on the seafloor at 10 knots. This
value should only be changed post-commissioning if the type of position sensor or its configuration
is changed.
m
OtiOn
d
elay
The motion delay value is displayed for information only and cannot be changed. The value is
determined by the type of motion sensor selected in the General Tab of the Ship Setup.
7.2.5 Power
The WMB-3230 (5230) BTxR can output 14 (16) different power levels, 7 in the low range and 7 (9)
in the high range. Each power level has a corresponding pulse width which is automatically applied.
The type of power control can be selected from three methods:
►
Manual Power
: The output power level is selected
manually using the Power Controls on the Main Menu (see
“Power Level Control” on page 7)
►
Auto Power by Depth
: The output power level is
determined by the current depth. The depth ranges are selectable from 14 drop-down boxes. A
Defaults
button resets all fourteen power levels to a default setting. When setting power level
depth settings individually, click the
Apply
button after setting the levels.
►
Auto Power by Signal
: The output power level is set according to the maximum acoustic echo
received (normally the seafloor). The received level is set to prevent saturation of the receiver.
This option should provide the best overall system performance.
The settings on the Sensor sub-tab require
an understanding of the motion sensors
equipped and carrying out a series of
procedures covered in section “6. Sensors”
on page 28 of the Installation Manual.
Note: There are TWO different Automatic Power modes. Automatic Power by Signal AND Automatic Power
by Depth. Automatic Power by Signal is better for seafloor mapping and seeing fish out on the sides near the
seafloor. Automatic power by Depth is useful to detect smaller fish easier at the cost of seafloor detection.
To switch between Manual and Automatic
Power, double click on the LED Power
Level indicator on the Main Menu.
