Carlson Merlin LT, Руководство пользователя

Страница: 16 / 62

P a g e | 16
4 Installation
This section of the manual describes a typical installation of the Merlin LT on a vessel, and its integration into the
vessel’s existing navigation system.
The installation workflow for a Merlin LT
without
the optional mounting plate is as follows:
1. Decide on a suitable mounting location for the Merlin LT on the vessel.
2. Orientate the Merlin LT parallel to the vessel centreline.
3. Secure the Merlin LT base plate in the selected mounting position.
4. Measure lever arms from the vessel’s IMU reference point to the measurement datum point on the Merlin
LT base plate.
5. Position the Merlin LT at the desired vertical angle.
6. Adjust and recalculate lever arms using the appropriate vertical laser offset adjustment.
7. Connect cables to Merlin LT.
o Lay out and connect power cable to 12 Vdc power source.
o Lay out and connect Ethernet cable to PC.
o
Lay out and connect PPS cable to PPS source.
o
Lay out and connect serial cable to ZDA source.
4.1 Choosing a mounting location for the Merlin LT
The location and mounting of the Merlin LT system on a vessel are important considerations in any installation.
Before any work is carried out, due attention should be paid to the following:
• The Merlin LT is an optical device that relies upon a clear line of sight to the survey area. Ensure the field
of view of the laser will not be restricted by any vessel infrastructure, such as railings, masts or antennas.
This ensures that the Merlin LT will have a clear view to the survey area.
•
The recommended Merlin LT installation location is often on the centre line, directly above the vessel cabin.
Alternatively, the location can be on either side of the centre line, as close to the centre of gravity (CoG) as
possible, and still with the Merlin LT parallel to the centre line.
•
The location should be easy to access so that routine maintenance, inspection and re-orientation can be
carried out regularly and without risk. A mast installation may offer the best line of sight but presents
problems when the Merlin LT unit must be removed for servicing.
•
The mounting location should be solid, free from vibration and rigidly secured with respect to the position
of the vessel’s IMU.
•
Avoid dusty or dirty areas, such as engine room exhaust emissions, that may cause the lenses to become
obscured.
•
The mounting location must allow space for a 360° rotation of the head. An obstacle could block the
movement and cause damage to the mechanical assembly.
• The location must be a suitable distance away from the power source, ZDA and PPS sources, and from the
PC. This ensures that all the cabling can be routed in a safe, strain-free manner.