Simrad SC90, Installation Manual

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419050/B
4 Verify that the measured voltages are within the permitted tolerances.
5 Close the Power Supply Unit.
Result
Record the values in the result table.
+72 VDC +12 VDC +4.9 VDC
Requirements:
+72 VDC ± 2 VDC +12 VDC ± 1 VDC +4.9 VDC ± 0.1 VDC
Requirements
Results
All measured voltages are within the permitted tolerances.
Date and signature:
Making a noise/speed curve to determine vessel noise
The performance of the SC90 will always be limited by different noise sources. During
the Installation Manual, accurate noise measurements are done for different vessel
speeds. The weather and sea conditions for the noise measurements will be those at
the time of the test.
Prerequisites
The SC90 is turned on, and it is working normally. The vessel is at sea. Recommended
minimum depth is 100 metres.
If the SC90 is operated from any other compartment than the bridge, an open two-way
oral communication channel with the bridge is required.
You need the following equipment:
• Personal computer
• Spreadsheet program
For the best possible conditions to complete the test, the ship must be "silent".
• There must be no other vessels in the vicinity.
• As much machinery as possible must be switched off. It is particularly important to
switch off electrical motors, as well as cooling systems and hydraulic pumps that
may cause electric noise.
• To prevent interference, all other hydroacoustic instruments must be switched off.
Simrad SC90 Installation Manual