Code Alarm SRT 5500 Specifications download pdf (Page 55)

December 2013

REQUEST FOR PROPOSALS FOR

PURCHASE AND DELIVERY OF HEAVY-DUTY BUSES

RFP SRTA-2014-01

TECHNICAL SPECIFICATIONS

PAGE-55

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i. Power to the Sign System shall be controlled by the Master Coach run switch. The signs

shall operate in all positions of this switch except the "off" position. The signs shall be

internally protected against voltage transients and RF interference.

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j. All electronic circuit boards used in the Sign System shall be conformal coated to meet

the requirements of military specification MIL-I-46058C. All Sign System components

shall be certified to have been subjected to a “burn-in” test of a minimum of twelve (12)

hours operation in a temperature of 150

F prior to final inspection.

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20.3 Display and Display Illumination

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a. All sign displays shall consist of pixels utilizing high intensity Light Emitting Diode’s

(LED), for superior outdoor environmental performance, (of amber illumination

appearance of light wavelength of 590 NM). LED should be made of AllnGaP II, superior

UV resistant epoxy lens and superior resistance to the effects of moisture. Each pixel

shall have a dedicated LED for illumination of the pixel in all lighting conditions. The Sign

System shall have multi-level intensity changes, which adjust automatically as a function

of ambient lighting conditions. There shall be no requirement for any fan or any

specialized cooling or air circulation.

b. This LED shall be mounted such as to be visible directly to the observer positioned in the

viewing cone, allowing for full readability 65 degrees either side of the destination sign

centerline. The LEDs shall be the only means of illumination of the Sign System. The

LED illumination source shall have an operating life M.T.B.F. of not less than 100,000

hours. Each LED shall not consume more than 0.02 watts.

c. The LED characters formed by the System shall meet the requirements of the Americans

with Disabilities Act (ADA) of 1990 Reference 49 CFR Section 38.39.

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20.4 Front Destination Sign

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a. The front sign shall be mounted on the front of the coach, near the top edge of the body,

behind windshield protection, and in an enclosed but accessible compartment provided

by the coach manufacturer. The compartment access door shall be secured by 3, 5/16”

square locks. The compartment opening shall also be large enough to allow easy

removal and installation a complete front sign assembly.

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b. The front destination sign message shall be readable by a person with 20/20 vision from

a distance of 350 feet for signs of display height greater than 8 inches and from and

distance not less than 275 feet for display heights less than 8 inches. The front sign shall

have a viewing cone of equal readability at 65 degrees on either side of a line

perpendicular to the center of the mean plane of the display. The intensity of the

illumination of the display pixels shall appear to the naked eye to be approximately

uniform throughout the full viewing cone.

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c. The sign mechanism shall be hinged on brackets to permit cleaning of the front inside

side glass without the use of tools. The compartment shall be sealed to prevent entry of

dust, dirt, water, and insects during normal operation and cyclone cleaning.

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d. The front sign compartment shall be enclosed by a UV protected clear glazing.

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20.5 Side Destination Sign

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a. The side destination sign shall be located on the curbside, towards the upper portion of

the passenger window that is located next to the front door. The side sign shall be

mounted in a fixed position using brackets provided by the destination sign manufacturer.

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Code Alarm SRT 5500 Specifications Page 55

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