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Maintenance procedures
Installing and maintaining software
Removing the operating software
If you wish to replace your Processor Unit with a new model, or simply do not wish to use the ST90 system any longer, you can remove the software. Software removal may also be required during an upgrade.

About this manual
The purpose of this publication is to provide the descriptions, procedures and detailed parameter explanations required to allow for safe and efficient use of the ST90 system. The publication also provides you with a thorough understanding of the parameters and adjustments provided by the ST90 system.
Simrad ST90
Operating procedures
Maintenance procedures
- Lowering and hoisting the transducer from the sonar room
- Setting up the interfaces to peripheral devices
- Inserting the installation parameters
- Installing and maintaining software
  - Installing a new version of the operating software
    A dedicated wizard is used to install the software. The operating software for the ST90 system must be downloaded on a separate computer.
  - Removing the operating software
    If you wish to replace your Processor Unit with a new model, or simply do not wish to use the ST90 system any longer, you can remove the software. Software removal may also be required during an upgrade.
  - Updating the online help system
    Installed on your ST90 system, you will find a comprehensive context-sensitive online help system. The help system is updated periodically. You can then update your ST90 system with the new online help.
  - Adding online help in a new language
    Installed on your ST90 system, you will find a comprehensive context-sensitive online help system. The help system may be provided in a new language. You can then update your ST90 system with the new online help.
  - Obtaining and installing a software license for additional functionality
    The ST90 system does not need any software licenses to operate. However, specific software license codes "unlocks" additional functionality.
  - Setting up the Operating Panel (Mk2)
    The Operating Panel offers all necessary control functions for normal operation. Before it can be put to use, the Mk2 Operating Panel must be configured to permit Ethernet communication between the panel and the Processor Unit.
  - Using more than one Operating Panel to control the sonar(Mk2)
    A secondary Operating Panel may be connected to the Processor Unit. This may be useful in conjunction with a second display if you wish to control the ST90 system from two different locations on your vessel.
  - Using a single Operating Panel to control more than one sonar(Mk2)
    Since the Mk2 Operating Panel uses Ethernet to communicate with the Processor Unit, you can use one single panel to control more than one sonar system.
  - Updating the Operating Panel support applications(Mk2)
    For the Operating Panel to communicate with the Processor Unit, certain interface applications are required.
  - Updating the firmware on the Operating Panel(Mk2)
    Whenever required the firmware in the Operating Panel can be updated to include new functionality or to correct software errors.
- Testing the noise conditions and the sonar functionality
- Preventive maintenance
User interface
Menu system
Functions and dialog boxes
Concept descriptions
Technical specifications
The technical specifications summarize the main functional and operational characteristics of the ST90 system. They also provide information related to power requirements, physical properties and environmental conditions.
Datagram formats
The ST90 system can send and receive information to and from several different peripherals. All transmissions take place as datagrams with data sentences. Each datagram has a defined format and length.
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Removing the operating software

If you wish to replace your Processor Unit with a new model, or simply do not wish to use the ST90 system any longer, you can remove the software. Software removal may also be required during an upgrade.

The following items may be useful:

Computer mouse
Computer keyboard

Neither tools nor instruments are required. This procedure is made for the Microsoft^® Windows^® 10 operating system. It is assumed that you are familiar with this operating system.

Note:

The software release note may contain additional details related to the software removal.

Removal of the software is done using functionality provided by the operating system.

Procedure

Turn on the Processor Unit.
Select Power off to turn off the system.
In the Power Off dialog box, select Exit to Operating System to close the ST90 program.
If applicable: Connect the keyboard and the mouse to USB sockets on the Processor Unit.
Uninstall the application.
1. If applicable: Open the on-screen keyboard.
2. In the bottom left corner of your desktop, select the looking glass to start a search.
3. Type Control Panel to locate the application, then open it.
4. Select Programs and Features.
5. On the list provided, locate the software you shall uninstall.
6. Select it, then select Uninstall.
7. Observe the Remove existing settings dialog box.
8. Do not select any check boxes!
9. Select Uninstall in the dialog box to remove the software.
10. Follow the instructions provided by the wizard.
Click the [X] in the top right corner to close the Control Panel.
If applicable: Disconnect the keyboard and the mouse from the Processor Unit.