Sensor Procedures; How To Calibrate The Depth Sensors - Simrad PI50 - REFERENCE MANUAL REV A Reference Manual

Sensor procedures

Topics
• How to calibrate the depth sensors on page 93
• How to reset the sensor counter on page 94
• How to smooth out the bottom and catch readings on page 94
• How to smooth out the data reception on page 95
• How to remove spikes and reflections from the sensor data on page 95
• How to set up spread and depth sensors to measure vertical geometry on page 96
• How to set up depth and height sensors to measure total water depth on page 98
• How to set up the height sensor to show the trawl opening on page 98

How to calibrate the depth sensors

Only depth sensors can be calibrated. The purpose is to make sure that the depth reported
by the sensor is as accurate as possible. This procedure is carried out on board the vessel.
Note
In order to calibrate the sensor, it must be submerged in salt water.
The software provided for calibration assumes that the sensor is lowered to 1 meter deep.
If you need to lower it even deeper, you will need to add this additional depth to the
value when you select and set up the sensor in the
Offset
Example: If you lower your sensor to 5 meters depth for calibration, you must enter
4 (meters) into the
Offset
→ Select Sensors on page 142
Mount a rope to the top fastening lugs on the sensor.
1
Tighten the rope, and measure one meter from the bottom of the sensor to a spot on
2
the rope. Place a visual marker on the rope at that location.
Lower the sensor over the side of the vessel and into the water. Lower it until the
3
visual marker on the rope is even with the surface.
You may wish to use a different depth reference than the sea surface. If this is the
case, change the marking on the rope to fit you preference, for example the depth of
the keel or the depth of an echo sounder transducer.
4 Observe the numerical presentation of the sensor depth, and allow the reading to
stabilize itself.
Click the icon under the
5
Setup
→ Setup menu on page 119
Click
6
Calibration
328458/A
for the sensor.
menu to open the
Main
.
Operational procedures
dialog.
Select Sensors
sub-menu.
Setup
93