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6 – Operating Procedure
❐
Check that you have connected the coil cables in the correct sequence (Starboard to Channel
1, etc.).
❐
At the SDC ensure that you have attached all necessary connections from the SEP/PSU, the
data logger, the altimeter, the video system and the printer as required.
❐
Check that you have installed and secured the SDC safely so that it will not move or fall with
movements of the survey vessel.
❐
Check and connect a noise-free power supply of the correct voltage to the SDC.
❐
Check the power supply connection from the ROV to the PSU. The standard PSU accepts AC
electrical power at a nominal supply voltage 110V.
❐
Set the correct format for external data logging.
❐
Set the RS232 parameters of the SDC 'COM2' and 'LOG O/P' (COM3) ports to match any
equipment connected to them.
❐
If you are using a current-loop communication method, check on the SDC to see whether the
'C/LOOP' LED shows green when you power-on the sub-sea installation. Select the Run Dis-
play screen and check that it updates correctly. Use the SDC oscilloscope display to check for
correct waveforms on all channels.
Operations Check List
Installation
1. Check that you have installed the 440 System correctly.
2. Set the internal clock of the SDC to the correct date and time.
Establishing the Start-of-Survey Configuration
3. Set the target scaling factor to the correct value.
4. Set the correct altimeter parameters, including any vertical offset measurements.
5. Set the threshold according to requirements.
6. Check that coil mapping correctly matches the specific installation.
7. Set the background compensation reminder interval.
8. Upon completion of 3 – 8 above, backup the configuration to the SDC hard disk.
9. Print the configuration and retain a copy with the survey records.
Pre-dive Checks
10. Power-on the 440 System thirty minutes before you deploy the ROV. If practical, perform a tar-
get detection test.
11. Use the SDC oscilloscope display and check for correct waveforms on all channels.
12. If your System has an altimeter fitted, perform an Altimeter Test and check that the System
receives data strings from the altimeter.
6-8
© Teledyne TSS
DPN 402196 Issue 4.1
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