Visual Inspection Of The Processor Unit - Simrad EK80 Installation Manual

Simrad EK80

Visual inspection of the Processor Unit

A visual inspection of the EK80 Processor Unit is required to verify that the unit has not
been physically damaged during the installation.
This procedure assumes that the EK80 has been installed as specified in the EK80
Installation manual.
You need the following specific test equipment:
• Multimeter
Context
Observe the installation shipyard's procedures for workmanship, installation of physical
units, and installation and termination of cables.
Procedure
1 Verify that the Processor Unit is installed in the correct location, and that it is suitably
oriented for replacement and cabling.
2 Verify that you have free access to rear and front side connectors on the Processor
Unit for maintenance purposes.
3 Verify that ample space is provided to open/close DVD and/or CD lids (if relevant),
and to insert and remove USB flash disks.
4 Verify that the Processor Unit can be opened, and that you have full access to the
interior of the unit.
5 If the unit is installed inside a rack or a closed compartment, check that ample
ventilation is provided to avoid overheating.
6 Check 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.
7 Use a standard multimeter to check that the resistance between the unit and the ship's
ground is approximately 0 (zero) Ω.
8 Check the physical installation of the unit.
a Check that the bolts, screws or studs holding the unit are of the correct size.
b Check that the correct flat and shake-proof washers have been used.
c Check that all nuts have been tightened properly.
9 Check that all welds and brackets have been painted with the correct preservation
medium to prevent corrosion.
10 Check that all cables leading to the unit have been properly mounted and secured.
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