KONGSBERG PI50 Fishing Troubleshooting Guide

5.4 Geometry data anomalies

Check the relative position of the back mesh sensor and two remote sensors. Remote sensors must be installed in reverse.

Confirm that all three sensors are online and there are no conflicts in the channels.

When using PI Mini-R substitute, confirm that the responder is activated.

5.5 Invalid sensitivity adjustment of receiver

Restore default Detection Threshold=17, turn off all filtering, and manually trigger sensor (such as immersion activation) testing near the hydrophone. If there is no stable data, it may be due to misalignment of the hydrophone beam or sensor distance exceeding the range. In trawl operations, hydrophones should be installed at a location at the bottom of the ship that is not affected by flow noise interference.

Daily maintenance and preventive measures

Sensor maintenance: Rinse with fresh water after each use and check if the sealing ring is damaged. Ensure that the contacts are dry before charging.

Hydrophone inspection: Regularly clean the surface of the hydrophone to avoid the attachment of marine organisms. Check if the cable sheath is damaged.

Computers and receivers: Keep well ventilated and dry. Regularly check the serial port cable connection, re plug and unplug to ensure no oxidation.

Software and settings backup: Use Main → User Settings to save the complete configuration of different jobs (trawl, purse seine). Regularly export log files from C: ProgramData Simrad PI50 Log for technical support analysis.

Firmware upgrade: Contact the dealer to obtain the latest version and update the receiver firmware through the SysLoad program.

Emergency recovery

If the PI50 software crashes or does not respond:

Restart according to the correct procedure: First, close the PI50 application (click Exit in the top right corner of the Title Bar), then turn off the computer and wait for 10 seconds before restarting. It is strictly prohibited to directly cut off the power to avoid damaging the serial port parameters.

If the system prompts "No license" or Hardware ID changes, it may be due to a replacement of computer hardware, and you need to contact the dealer to reapply for a license.

If the indicator light inside the sensor receiver is abnormal (refer to the definition of the LED on the front panel of the receiver), it may need to be repaired.