Operation Manual

Sensors
145
850-165186 / Rev.B
Numerical presentation
On the PI54 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 f ails, this is
indicated with the characters ±±± .
(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 second.
(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.
Sensor configuration
On delivery, all Spread sensors are configured in Channel 2,
with Fast update rate, and for use with Remote 1.
Note: The sensor and the PI54 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 (~5,5 sec): Recommended for new trawl or gear or
changes in rigging to monitor any instabilities or unexpected
changes. This mode provides the shortest battery life before
charging.
• Normal (~14 sec): Recommended for well known trawl, gear
and door behavior with stable situations. Use this setting
during normal conditions.