Hawk ORCA - Setup Procedure; Advanced; Gain4 Default Settings; Gain-Over-Distance Bias

Setup Procedure
ORCA Sonar System
25
Advanced
The Advanced menu contains parameters for Gain control, manually adjustment of speed of sound, offset and
restoring the amplifier and transducer to their default state.
These settings typically do not require adjustment unless there are special circumstances. Do not adjust
Advanced settings without expert knowledge or consulting your local representation.
Parameter Description Options
Gain4
Primary sensitivity adjustment. This value is automatically
(1)
set by the
selected Interface range in Quickset. Higher values for lighter densities.
Adjustable
GainStep3 Adjustment of sensitivity for DistStep3 zone. Adjustable
DistStep3 Depth of zone measured from the sensor face for non-variable GainStep3. Adjustable
SlopeInc
Increase or decrease Gain-Over-Distance bias
(2)
Adjustable
(default 1.5%)
Threshold Minimum echo size which the unit will accept as a valid echo Adjustable
EmptyDist
Unit will not consider any echoes beyond this distance valid.
This is automatically calculated by the ‘Low Level’ parameter.
Adjustable
Temp Tr im Create manual measurement offset for a specific temperature. Adjustable
Dist Tr im Create manual measurement offset for a specific distance. Adjustable
Velocity Adjusts the internal speed of sound calculation. Adjustable
(1)
Gain4 default settings
Interface Selected (g/l) Default Value
0.1 - 0.6 24.9%
0.6-1.2 14.9%
1.2-3.0 10.0%
3.0-6.0 4.9%
6.0-10.0 2.0%
10+ 1.1%
(2)
Gain-Over-Distance bias
The ORCA system uses automatic Gain control
to enhance signal tracking during difficult process
conditions. Increasing SlopeInc% from 1.5% to 2%-
4% will assist the unit to place emphasis on deeper
measurement (bed level). If the unit is locking to a
higher interface during sliming or difficult conditions
try increasing this value. Do not exceed 4%. See
'Troubleshooting' for more information.