Function Testing

The following list describes how to function test the Subsonus in a large tub.

1. Fill a large tub or test tank with water. Ensure the tub is large enough and the water is deep enough to submerge both devices.

   A minimum size of 1 m x 1 m x 0.4 m deep is recommended.

2. Remove the cable pigtail from the connector on the Subsonus unit and the supplied cable. Install the cable to the unit, ensuring that the connectors are mated correctly and the jackets are screwed on hand tight.

   Note: The connectors used on Subsonus require silicone grease to ensure they seal correctly. Keep the sealing faces free of debris or damage and ensure the female connector is completely sealed with grease before every mating. Recommended silicone grease: Dow MOLYKOTE™ 111

3. Connect the Subsonus cable to PoE injector and the PoE injector into a local network (with DHCP) - see Connection Diagrams for more information. Power everything on.

   Note: When the PoE injectors are being supplied power, the DC Run LED will indicate green and when the PoE OUT is connected and power is being drawn from the PoE RUN LED indicator will also change to green. When Subsonus is on, it will beep.

4. Repeat steps 2-4 for the second Subsonus unit.

5. Place both devices into the tub of water, ensuring they are submerged. Failure to submerge Subsonus units while powered on for extended periods may cause an increase in temperature, causing damage.

   Face the units toward each other so that the hydrophones are facing one another, as far apart in the test tank as possible.

6. Open your web browser and type in the address http://surface.local/ to connect to the surface Subsonus unit. The trailing forward slash is required on some web browsers.

   If you cannot connect to the Subsonus at this address, see Interfacing with Subsonus

7. Navigate to "Configuration"→"Acoustics" and ensure the Operation Mode for the surface unit is set to "Master". Confirm that the Device Address is set to 1.

8. Navigate to "Configuration"→"Devices" in the web UI or click on the plus icon in the Main View under the Device List (see Device List). Click on "Run Acoustic Discovery"

   The second Subsonus will appear under "Discovered Devices". Add the device to begin tracking using the default configurations.

   If the subsea Subsonus does not appear:

   • Navigate to http://subsea.local/ to confirm that the device is connected to the network and powered up correctly. If you cannot connect to the Subsonus at this address, see Interfacing with Subsonus

   • Navigate to "Configuration"→"Acoustics" and ensure the Operation Mode for the subsea unit is set to "Slave". Confirm that the device addresses for both units are unique. see Device Address Identification for more information on device addresses.

   • Navigate back to the Surface Subsonus web UI and follow the prompts in Creating a Track Target (Subsea device).

9. Once the surface unit (master) is set to track the slave, you should hear the devices communicating. Note that location data will be inaccurate due to the lack of GNSS position data (see Surface Unit Reference Source for more information)

10. Monitor the acoustic data being transmitted in the Device List (see Device List). If there are many missed replies, confirm that the units are close together, and the blue hydrophones facing one another.