M A X I M I Z I N G Y O U R P E R F O R M A N C E A T S E A
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Numerical presentation
On the PI display, the distance between
the trawl doors is displayed in the numeric
display. If the distance is increasing or
decreasing, this is shown with two arrows
and the variation in meters per second.
When the readings are stable, the digits
are shown in black colour. When the
values are predicted, the digits are grey,
and if the contact is lost, the characters
***
are shown in grey. If the transvere
communication link fails, this is indicated
with the characters
±±±
.
Mounting
The Spread and Remote sensors
must be mounted in special
adapters on each trawl door.
These adapters must be installed
aforehand. Detailed information
on how to install the adapters are
provided with the installation kit.
Installation principle
The PI Spread sensor is mounted
on the port door, while the PI
Remote sensor is mounted on
the starboard door. It is essential
that there is a clear line of sight
between the two transverse
communication “eyes” (one on
each sensor), and between the top
of the PI Spread sensor and the
hydrophone on the vessel.
System confi guration
Sensor configuration
: The sensor
must be configured with a unique
sensor number. Select channel number
and update rate according to the
sensor’s configuration. Write down the
configuration for future reference.
Status & Receiver
: The Interference
filter must be switched on. Set it to
level
9
if you have noise problems from other
hydroacoustic sources. Note that with
the filter on, it will influence the signal
spectrum shown in the
Status display
.
Sensor filter
: Switch this filter to
Light
.
Set it to
Heavy
only if you experience
excessive noise. Position
Off
will provide
Off
Off
raw data and fastest possible response.
(CD11009E)
A
D
D
E
G
B
C
F
(A) = Sensor set up as sensor no.3. The
distance is measured in meters.
(B) = Current distance between the trawl
doors.
(C) = The distance is increasing by 18
meters per minute.
(D) = Arrows pointing “out” means
that the distance is increasing. Arrows
pointing “in” means that it is decreasing.
(E) = Graphic alarm
(F) = Indicator, lit for every sensor
interrogation.
(G) = Interference symbol.
A
R
S
D
C
F
E
B
(CD11204E)
Top view:
(A) = Starboard door
(B) = Port door
(C) = Communication link to
vessel’s hydrophone
(D) = Angle of attack
(E) = Direction of tow
(F) = Transverse communication
link
(R) = PI Remote sensor in its
adapter
(S) = PI Spread sensor in its
adapter
Sacrifi cial water switch
sensor
If the water switch on your
sensor is a sacrificial brass screw,
this screw must be checked every
month. Whenever required due to
wear and tear, the screw must be
replaced. Refer to the operational
procedures in the operator manual.
