Teledyne 440, System Manual, Page: 115 / 256

6 – Operating Procedure
DPN 402196 Issue 4.1 © Teledyne TSS 6- 11
Check the threshold setting by opening the system parameters window [Shift+F2] from the
Configuration options. If necessary, the number can be modified from this menu.
6.3.1.3 External Logging Format
The 440 System provides three alternative formats for logging data externally. The default conditions is
to log the co-ordinates, signals and quality check-code information simultaneously (see
section 6.2.2.2
"External Data Logging" on page 6-20 ). You should not need to alter this setting.
Select the external logging format using the External Output option from the Configuration options.
6.3.1.4 Serial Port Parameters
An overview of the default port configurations and use can be found in section 5.3.2 "Communication
ports" on page 5-5 . Any changes in configuration to any of the ports used with the SDC is covered in
the respective subsections related to the operation and connections required.
6.3.1.5 Background Compensation Reminder
During normal operation, you should perform a background compensation check at regular intervals to
detect and compensate for any variations in the background signal from the ROV.
The background compensation reminder allows you to set a pre-determined interval of between 1 and
360 minutes. After the completion of the pre-set interval, the SDC will display a message banner as a
reminder to perform this important check. You may clear this panel by pressing [ENTER] after making
the check, or by performing a background compensation.
You may adjust the interval from within the System Parameter Window [Shift+F2] from the
Configuration options. The default setting is 30 minutes. It is possible to disable this reminder feature
by setting the interval to zero. Teledyne TSS does NOT recommend that you disable the reminder
interval.
6.3.1.6 Altimeter Parameters
You may gain access to the altimeter parameters by selecting the Altimeter Window[Shift+F3] from the
Configuration options.
If you have connected an altimeter to the 440 System, select the appropriate model in the first field by
selecting the available options.
Enter the vertical distance between the bottom face of the search-coils and the transducer face of the
altimeter. Enter a positive value if the altimeter is higher on the ROV than the search-coils.
If you have no altimeter fitted to the 440 System and your ROV allows you to set the coils at a fixed
altitude above the seabed, enter the fixed altitude value.
NOTE
You must still enable the altimeter for the System to use the value for fixed alti-
tude.