Martin Pro Compact Sicherheits- Und Installationshandbuch Seite 30

using the two clamps. Install the fixture hanging vertically downwards only. Secure the fixture with a
safety cable as described in 'Secondary attachment' on page 31.
Avoiding galvanic corrosion
The fixture and mounting bracket are manufactured in corrosion-resistant anodized aluminum. Avoid
mounting the fixture in direct contact with other types of metal, as this can cause galvanic corrosion.
When fastening to a metal that is not aluminum:
• Use an electrically insulating material (such as rubber or plastic) or coating between the mounting
bracket and the other metal.
• Use a non-conductive coating on fasteners (screws, bolts, washers, etc.) where they come into
contact with the mounting bracket.
Fasteners
The type of fasteners used will depend on the installation, but use a minimum of three high-strength
corrosion-resistant fasteners that are suitable for the installation environment and application. We
recommend that all fasteners are stainless steel A4-70 grade according to ISO 3506 or steel grade 8.8
according to ISO 898-1 or better.
Install washers between the head of each fastener and the yoke base. If you use nuts, use self-locking
type only and install washers under the nuts.
Anchoring to a surface or structure
The fixture's mounting yoke base must be securely anchored to a flat surface on a wall, pedestal,
structural beam or other suitable support. The yoke allows the fixture to be manually panned and tilted
for beam aiming adjustment.
To anchor the fixture to a surface:
1. See illustration on next page. Fasten a 12 mm (1/2 inch) shaft diameter bolt to the surface through
the center hole A in the mounting yoke.
2. Fasten two bolts with 8 mm (5/16 inch) shaft diameter to the surface with one bolt passing through
each of the curved slots C to anchor the fixture. This will give approximately 90° of pan
adjustment.
3. Adjust the fixture's pan angle (side-to-side beam aiming) as described later in this chapter.
Adjusting pan is best carried out with power applied to the fixture so that the projection is visible.
Once pan is correct, fasten two 12 mm (1/2 inch) shaft diameter bolts to the surface with one bolt
passing through each of the holes B. Once bolts have been installed in holes B, pan adjustment is
no longer possible.
30 Exterior Projection Pro Compact Safety and Installation Manual
A
B
C
Mounting yoke base
B
C