Operation Manual

Operational procedures
97
850-165186 / Rev.B
1 Press the MENU button to access the main menu.
2 On the Setup menu, select Sensor alarm/calibration.
- Observe that the Sensor alarm dialogue opens. In this
dialogue, only the sensors currently activated are
shown. Each of them provide various alarm functions.
3 Select minimum and/or maximum limits for the individual
sensors, and activate each alarm separately.
4 Press the ENT key to store the parameters and exit.
Note that the Catch, Rip and Bottom Contact sensors can only
provide alarms when they are activated, that is when their
detector wires have been pulled tight.
Surface temperature alarm
The surface temperature alarm provide you with an audible and
visual warning if the temperature exceeds predefined limits, or
if it changes too fast.
1 Press the MENU button to access the main menu.
2 On the Setup menu, select Sensor alarm/calibration.
- Observe that the Sensor alarm dialogue opens.
3 Press the GAIN+ button repeatedly until the Surface
temperature dialogue appears.
4 Select minimum and/or maximum temperature limits for
the alarms, and activate each alarm separately.
5 Enter the appropriate value for the Shear alarm,and
activate the alarm.
6 Press the ENT key to store the parameters and exit.
The Shear alarm will be triggered if the temperature changes
faster per minute than the value you have entered.
Note: In order to enable these alarms, your PI54 must have the
relevant temperature feeler fitted!
Clearance alarms
The clearance alarm provide you with an audible and visual
warning if a trawl or another towed object either moves too
close to the bottom, or lifts too far off the bottom.
1 Verify that the echo sounder is operational.
2 Press the MENU button to access the main menu.
3 On the Setup menu, select Sensor alarm/calibration.
- Observe that the Sensor alarm dialogue opens.