Kongsberg SIMRAD HT20470, Installation Manual

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492671/C
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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 for maintenance purposes.
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.
Setting to work