Hull Unit Control dialog box
The Hull Unit Control dialog box allows you to lower and hoist the transducer. The dialog box also provides status information about the transducer position. You can monitor the current position of the transducer and make changes to the position defaults.
How to open
To open the Hull Unit Control dialog box, select Hull Unit on the top bar.
Description
To lower the transducer select Down. To hoist the transducer select Up. To move the transducer to its predefined middle position, select Middle.
The numerical value shown in the Hull Unit Control dialog box measures the vertical travelling distance. It stops when the transducer reaches the middle position, and shows you the vertical distance. It stops when the transducer is fully lowered, and shows you how far down this is. It stops when the transducer is fully retracted, and shows you that the vertical distance is 0 (zero).
Retracting the transducer to a middle position may be useful if you use the ST90 system simultaneously with other sonars. A higher position will permit you to increase the vessel speed. If you operate in very shallow waters, you may also reduce the risk of hitting bottom. However, placing the transducer immediately under the hull may increase the flow noise.
If you have a very large hull unit you can define two middle positions.
The Middle button on the Operating Panel can only be used to lower or hoist the transducer to the initial middle position. If you want to place the transducer in position "Middle 2" you must use the Hull Unit Control dialog box.
Transducer position
The graphic presentation illustrates the transducer's current physical position relative to the hull unit. The presentation allows for easy determination of the transducer status. The illustration uses symbols and colours to convey the information.
- A blue circle depicts the normal situation with the transducer hoisted, lowered, or in a middle position.
- A blue triangle depicts that the transducer moves up or down.
- A red triangle shows that the transducer and hull unit do not communicate with the ST90 system.
The ST90 system can be provided with one of the following hull units:
| Hull Unit | Lowering depth (m) | Transducer cable (m) | Maximum speed (knots) |
|---|---|---|---|
| ST92 | 1.2 | 4.6 | 16 |
| 7 | |||
| ST93 | 1.6 | 4.6 | 16 |
| 7 | |||
| ST94 | 2.1 | 4.6 | 11 |
| 7 | |||
| The same transducer is used on all hull unit types. | |||
| If a Hull Unit Controller is supplied with the system, the Motor Control Unit cabinet is used as a junction box. | |||
Related functionality
- Hull Unit (top bar)
Hull Unit is located on the left side of the top bar. Select it to open the Hull Unit Control dialog box.
- Hull Unit Configuration page (Installation dialog box)
The ST90 system can be provided with different hull units. The main difference between these hull units is the length of the transducer shaft, and thus also the physical height of the entire hull unit assembly. The same transducer is used on all hull unit types. Select which type of hull unit that has been installed. You only need to do this once.
Note:The choice you make is vital for all operation. An accidental change to the setting may cause damage to your ST90 system.
This page is located in the Installation dialog box. To open the page, select Installation on the Setup menu.
- Hull Unit page (Diagnostics dialog box)
Use the Hull Unit page to read the software and firmware versions from the Hull Unit Control board.
This page is located in the Diagnostics dialog box. Open the Diagnostics dialog box from the Setup menu.