381298/C
185
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.
11
Verify that enough slack has been provided on the cables to allow maintenance
and replacement.
12
Verify that the unit is not physically damaged, and that the paint-work is clean.
The physical handling of the unit during the installation may have caused some
scratches to the paint-work. This can be accepted. However, if rough handling has
caused serious damage to the unit, this must be recorded with a written statement
and necessary photos, so that corrective actions can be made.
13
If irregularities are found, write these down in the in the
Installation remarks
table.
Visual inspection of the Transceiver Unit
A visual inspection of the SN90 Transceiver Unit is required to verify that the unit has
not been physically damaged during the installation.
This procedure assumes that the SN90 has been installed as specified in the SN90
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 Transceiver Unit is installed in the correct location, and that it is
suitably oriented for easy maintenance and replacement of parts.
2
Verify that you have free access to all the connectors on the Transceiver Unit for
maintenance purposes.
3
Ensure that the Transceiver Unit can be opened, and that you have full access to
the interior of the unit.
4
Check that the bulkhead structure to which the Transceiver Unit is fastened is
substantial enough to hold the unit securely under all operating conditions.
5
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.
6
Use a standard multimeter to check that the resistance between the unit and the
ship's ground is approximately 0 (zero) Ω.
Summary of Contents for Simrad SN90
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