Specification Clearmain 9504 And 9506
Use
Main road lighting, the spacing/moutning height ratio should not exceed 5:1.
Lamp
200-watt Osram linear sodium lamp.
Mounting
The Z9504/6 side entry lantern requires not less than 5 in of horizontal unthreaded 1.1/4 in. B.S.P.
When fully home two 7/16 in diameter Allen type grub screws grip the barrel. Water running
along the barrel is prevented from entering the lantern by a water baffle.
Lantern Body
One-piece light alloy die-casting. The inner surface of the body is white enamelled. The Z9504 body carries
the lampholders, thermal relay and porcelain terminal block. An earthing screw and porcelain cable cleat
are provided.
The Z9506 lantern carries the lamp operating gear in the lantern body. The transformer, power factor
correciton capacitor and thermal relay are fixed to a removable gear tray. The gear tray is finished in glossy
synthetic white enamel. The lantern can be fitted with fuses if required.
Lampholders
Two moulded, insultated bi-pin holders.
Optical System
Light control is provided by two injection moulded 'Diakon' refractor plates. The prismatic sides of the
plates are bonded one to each inner side of a 'Diakon' bowl. Both inner and outer surfaces of the bowl are
smooth for easy cleaning. The ends and sides of the bowl not carrying refractor plates are lighting
obscured.
The bowl is hinged to the lantern body and fastened by means of two stainless steel toggle catches. A
tropicalised felt gasket between the body casting and bowl ensures a weatherproof seal when the lantern
is closed.
Weathering Finish
The alloy used is specially selected for its resistance to corrosion. Further protection is obtained by the
use of a pre-treatment primer and stove enamel top coat.
The Z9506 side entry lantern with the bowl opened to show the lamp mounting and gear tray.
This iso-candela diagram is based on an average lamp light output through life from a 200-watt Osram
linear sodium lamp (18,400 lumens average, applicable at time of print).
Directional intensity ratio: 2.1:1
Light above horizontal: 8%
Light output ratio: 81%
Lumens in the lower hemisphere: 13,600
Light distribution data are given for the guidance of the lighting engineer and represent the
average results of laboratory tests on a number of lanterns taken at random from stock.
The data are based on the lamp characteristics stated; if the latest lamp efficiency is different,
the candela or lumen values should be calculated in direct proportion to the relative lamp
lumens.
Lantern weights
Z9504; 24 lb (10.9kg)
Z9506; 43 lb (19.5kg)
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