Simrad PI RIP - QUICK REFERENCE GUIDE REV B User manual

QUICK REFERENCE GUIDE
PI Rip sensor
Purpose
The
PI Rip
sensor is identical to the
PI Catch
, and it must be regarded as a
second application for the Catch sensor.
The
PI Rip
sensor will monitor if your
net is damaged and ripped apart due to
obstructions or foreign objects on the
seabed.
(A) = The PI Rip is mounted on the
footrope with the two sensor wires
stretched out and the wires engaged.
(B) = Two strong rubber bands
ensure that the sensor is activated.
If the net is torn, the slack in the net
will disengage the Rip sensor.
Daily operation
In most cases, one or two Rip sensors
mounted on the footrope will be
sufficient to monitor the condition of the
net. Once installed and put to use, the
sensor will automatically be switched on
once the waterswitch is activated. After
an initial startup, the sensor will detect
the status of the detection wires, and
transmit this information to the vessel.
When the sensor is not in use, check
that the sensor lamps (D) do not flash
from time to time, as this indicates that
the sensor is on and is discharging its
batteries. In this case, wash the sensor in
fresh water to remove salt and dirt.
Main parts
(A) = Negative charging / fastening lug
(B) = Positive charging / fastening lug
(C) = Communication link
(D) = Location of sensor lamp
(E) = Water switch sensor
(with sacrificial bolt)
(F) = Detection wires
Sensor confi guration
On delivery, all Rip sensors are
configured in
Channel 4
and with
Normal
update rate. If you wish to use
Rip
and
Catch
sensors simultanously, one of them
must be set to a different communication
channel.
Note: The sensor and the PI system
setup must correspond, otherwise the
communication will not work.
To change the sensor setup (channel
selection), use the PI Configurator utility.
The sensor update rate controls how
often the sensor reads and reports the
door spread. Three settings are available.
Note that a faster update rate will
decrease the battery life.
Fast
(~5,3 sec): Recommended if you
suspect that the bottom conditions are
rough and unpredictable, and that damage
may be easily inflicted. This mode
provides the shortest battery life before
charging.
Normal
(~33 sec): Recommended for
normal bottom conditions.
Slow
(~125 sec): Recommended if the
bottom conditions are well known, and
you know that no obstructions exist.
This mode provides longest operational
battery life before charging.
857-165111 / Rev.B / December 2005
(CD11206A)
BB
A
A
A
B
C
B
D
F
(CD11206C)
E
)
)
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 will provide Off
raw data and fastest possible response.
If you operate with
Fast
update
Fast update Fast
rate, the sensor must be charged
approximately every 35 hours. Used
with
Normal
or
Normal or Normal
Slow
update rates,
the operational life is approximately
150 or 300 hours respectively. The
optimal sensor charging temperature
is from +10 to +25° C.
Note: Charging sensors at sub-zero
temperatures can create explosive
gasses. Simrad assumes no liability
for the improper charging of
sensors or the use of chargers not
specified in Simrad sensor charging
documentation.

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Numeric presentation
On the PI display, the Rip sensor status is displayed with graphic
symbols. The timers count the total number of minutes the
sensor has been activated (red rectangle). If only predicted
timer values exist, the timer characters are shown in grey.
If the sensor communication is lost, the graphic symbol is
replaced by the characters ***.* (in grey).
(A) = Sensor set up as sensor no.3.
(B) = A yellow rectangle indicates that the sensor has deactivated,
and that net has been damaged. The timer has stopped.
(C) = The timer counts how many minutes the sensor has been
activated with a serviceable net during a tow. It must be
reset manually.
(D) = Indicator, lit for every sensor interrogation.
(E) = Interference symbol.
(F) = A red rectangle indicates that the sensor is activated. This is
the normal position, and it means that the net is serviceable. The timer
is running.
(G) = Timer
Mounting
Location:
Place the sensor where you
wish to check the net condition. This
is normally close to the footrope at the
center of the net. If the net is torn, the
slack will release one or both of the
sensor’s detection wires.
Attachment:
The sensor’s orientation
towards the vessel is maintained by the
steel and nylon attachment rings. The
number of meshes the attachment rings
are supported between must be restricted
to avoid unnecessary stress on the sensors
fastening lugs. The use of both nylon
and steel attachment rings is required to
secure the sensor lugs if excessive forces
are applied on them. The nylon rings will
stretch or break down, but the steel ring
will prevent the sensor from being lost.
Note that two steel rings must be mounted
on the same side of the sensor.
Rubber straps:
The two rubber bands
(E) must be stretched towards aft, and
mounted to the meshes in such a way
that the detection wires are engaged
during normal operations. The angle
between the two rubber bands should be
approximately 70 degrees. Inspect the
rubber straps regularly and always before
a new haul. Replace them if you detect
visible signs of cracks or damage.
134
135
C3
C2


AC
E
FG
B
D
(CD11101S)
(CD11206B)
EE
D
B
C
C
F
B
F
A
Rip sensor attachment to the net,
location just aft of the footrope. The
distance between the anchor points for
the attachment rings and rubber straps
must be defined depending on the size of
the net and how large area you wish to
monitor.
(A) = Snap hook and screw link
(B) = Steel attachment rings
(C) = Nylon attachment rings
(D) = Detection wires
(E) = Rubber strap
(F) = Attachment point
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.