STRAND SELECON RAMA 7 INCH LED FRESNEL SPECIFICATION.

GENERAL.

A.) Overview.

1.) The Fresnel fixture shall be purpose designed for performance lighting applications.

2.) The Fresnel fixture with integrated safety cable shall be supplied with a hard-tooled color frame and a short form instruction manual for immediate use. A detailed instruction manual shall be available for download from the manufacturer's website.

3.) The Fresnel fixture shall comply with ETL and cETL standards and listed to U.L. standard 1573.

4.) The Fresnel fixture shall be able to be operated to a maximum power input voltage of 120V.

5.) The Fresnel fixture shall use a 3100K custom designed LED engine.

6.) The Fresnel fixture shall be supplied with a 3-foot long temperature resistant silicon rubber cable. There shall be three conductors of a 1.5mm diameter within. The power supply cable point of entry to the Fresnel fixture shall be a trumpet gland constructed from high temperature resistant engineering plastic. There shall be no direct clamping pressure on the cable, and a separate IEC plug and connector shall not be acceptable. The power supply cable shall be retained by two separate indirect pressure points located within the cable connector compartment.

7.) The Fresnel fixture shall not exceed 20 lbs in weight including the barndoor accessory and color frame.

8.) The Fresnel fixture shall have the following dimensions:

a.) Height: 16 1/2 inches.
  
b.) Width:  14 1/2 inches.
   
c.) Length: 19 inches.

9.) The lamp house of the Fresnel fixture shall have rounded corners and edges with no sharp edges. It shall be constructed from aluminum and engineering plastics.

10.) The sides of the Fresnel fixture shall be constructed from extruded aluminum for strength, lower weight and no noise during the expansion and contraction period when the Fresnel fixture is heating up. Sides constructed from sheet metal shall not be accepted. Ventilation of the Fresnel fixture shall be maximized by not less than five convection slots running the entire length of the lamp house.

11.) The front and rear of the Fresnel fixture shall be constructed from high temperature and impact resistant engineering plastic moldings for strength, lower weight and no noise during the expansion and contraction period when the Fresnel fixture is heating up. Front and rear castings constructed of metal shall not be accepted.

12.) There shall be a rear grab handle mounted on the rear of the Fresnel fixture. The grab handle shall be constructed from high heat and impact resistant engineering plastic, and shall have a warning label formed as an integral part of the handle.

13.) For ease of service, it shall be possible to gain access to the interior of the cable connector compartment by the removal of three screws and the cable connector compartment cover.

14.) The paint finish of the Fresnel fixture shall be low reflective, matt charcoal color, electrostatically applied, baked on epoxy powder coat. The finish of all exterior plastic components shall be matt charcoal color.

15.) The Fresnel lens shall be 7" in diameter, mounted inside the fixture and fully supported around its entire circumference. Stainless steel springs shall hold the lens in position and allow for movement caused by heat expansion.

16.) The Fresnel fixture shall have a specially designed LED engine moving on a slide focus carriage

17.) The lens shall be quickly accessed for cleaning without tools in the lamp housing by means of a side hinged bottom tray held closed with a spring clip assembly. It shall possible to clean the lens and reflector of the Fresnel fixture without altering the set focus position.

18.) The Fresnel fixture shall comply with the following performance specifications when:

a.) Beam Angle: (2:1 variation from centre peak) 7-50 degrees.

b.) Peak Light Level: 7 degrees 133.3 foot candles, 50 degrees 10.8 foot candles at a 26 ft throw

B.) Operation.

1.) The Fresnel fixture shall be panned by loosening the yoke nut and bolt, twisting the yoke to the desired position, and tightening the yoke nut and bolt. 

2.) The Fresnel fixture shall incorporate a locking clamp disc and knob for tilt operation. The operator shall be able to loosen the tilt-locking knob, tilt the Fresnel fixture and then lock the Fresnel fixture in place.

3.) The focus fastening system shall be by a simple heat resistant low maintenance screw knob. 
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5.) It shall be possible to access the lamp of the Fresnel fixture without the need of tools and without altering the focus position of the fixture or the barndoor accessory. Lens cleaning access that alters the focus position of the fixture or the barndoor accessory shall not be accepted.

6.) The lens access shall be by means of a side hinged bottom tray held closed with a spring clip assembly. The hinge design shall be incorporated in the shape of the lamp house side extrusion and shall run the length on the lamp house for strength and rigidity.

7.) The mains power shall be automatically disconnected when the lamp access tray is opened.

8.) The Fresnel fixture shall incorporate an integral safety cable that shall be able to be retracted into the fixture when not in use. The safety cable shall be rated for the weight of the fixture.

9.) It shall be possible to adjust the balance of the Fresnel fixture by repositioning the yoke as required along the length of the fixture. There shall be a balance point marked on the focus reference scale.

10.) The Fresnel fixture shall have three accessory slots for positioning of a safety mesh, color frame and barndoor accessory. The accessories shall be retained in the Fresnel fixture with an accessory slot cover. A spring retention clip shall not be accepted.