Maintenance and Troubleshooting
Read this section for troubleshooting and maintenance information.
- Checking Noise Interference
  Use the spectrum analyzer to check the noise level of the hydrophones and check for interference.
- Charging the Sensor
  Charge the sensor at any battery level with either Marport Dock charger, Basic Sensor Charger or Medusa II Multi-charger.
- Cleaning the Sensor
  You need to regularly clean the sensor for proper performance.
- Maintenance Checklist
  We recommend you to follow this maintenance schedule for better performance and to avoid any trouble with the equipment.
- Troubleshooting
  Learn how to solve common problems.
- Support Contact
  You can contact your local dealer if you need maintenance on your Marport products. You can also ask us at the following contact details:

Echogram is fixed and blue

The echogram displayed in Scala2 is completely blue. There is no yellow line moving on top of the echogram, which means that no sonar data is received.

Sounder frequency may be outside the correct frequency range.

From Mosa2, click Trawl Explorer > Ping Down Frequency/Ping Up Frequency and check that the frequency is between 120-210 kHz.
If not, change the frequency.

You may have dragged and dropped wrong sonar data to the display.

Check that the name of the sensor on the top left corner of the echogram is .
If not, from sensor data, click + hold Range of Sonar Data and drag it to the page.

The sounder in the transducer is damaged.

Contact the support service for repair.