Visual inspection of the Processor Unit
A visual inspection of the Processor Unit is required to verify that the unit has not been physically damaged during the installation.
Prerequisites
The sonar system hardware units are installed as specified in this manual. The sonar system is turned off. You need the following equipment:
•  Multimeter
Procedure
1 Make sure that the computer is installed in the correct location, and that it is suitably oriented for replacement and cabling.
2 Make sure that the physical installation of the unit has been completed.
a Make sure that you have free access to rear and front side connectors on the computer.
b Make sure that ample space is provided to open/close DVD and/or CD lids (if relevant), and to insert and remove USB flash drives.
c Make sure that ample ventilation is provided to avoid overheating.
d Make sure that ample space is provided around the unit to allow for maintenance and replacement of parts.
e Make sure that the bolts, screws or studs that have been used are all of the correct size.
f Make sure that the correct flat and shake-proof washers have been used.
g Make sure that all the nuts have been tightened properly.
h If applicable: Make sure that all welds and brackets have been painted with the correct preservation medium to prevent corrosion.
3 Make sure that the unit is not physically damaged, and that the surfaces and paint-work are clean without dents or scratches.
The physical handling during the installation may have caused some minor scratches to the surfaces or paint-work. This can be accepted. However, if rough handling has caused serious damage, this must be recorded with a written statement and necessary photos, so that corrective actions can be made.
4 Make sure that the unit is firmly connected to ship's ground.
a Make sure that the unit is securely connected to the ship's ground with an earthing strap. The strap must be in addition to any incidental electrical contact made by the mounting lugs on the unit.
b Use a standard multimeter to check that the resistance between the unit and the ship's ground is approximately 0 (zero) Ω.
5 Make sure that cable installation has been completed.
a Make sure that all cables leading to and from the unit have been properly mounted and secured.
b Make sure that enough slack has been provided on each cable to allow for maintenance and replacement.
6 Make sure that the unit has been identified with the relevant product label(s), and that one label includes the part and serial numbers.
Result
Requirements Results
The Processor Unit is correctly installed with easy access for maintenance and replacement of parts.
The Processor Unit is new, clean and free from scratches, dents or other physical damage.
Free access to all the connectors on the Processor Unit is provided. All cables are properly mounted with enough slack.
The Processor Unit can be fully opened for access to the internal parts.
The Processor Unit is properly connected to vessel ground.
Date and signature: