Rev.11-1-95
CHANGEABLE MESSAGE SIGNS
801-T-063
The Standard Specifications are revised as follows:
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1. Be of solid state design and be removable
2. Include a standard typewriter configuration keyboard through which user originated messages may be entered for display or storage
3. Be capable of message programming from an IBM compatible computer which shall be removable while the sign continues to normally operate. While removed, the laptop computer shall be capable of operating to permit programming of messages for subsequent loading into the message sign by plugging the laptop computer into the sign using a standard interface such as RS-232.
4. Have a laptop computer available as an option
5. Have IBM compatible programming software and documentation available as an option
6. Include a liquid crystal display screen upon which actual messages, and not message code numbers, may be reviewed and sequenced before display on the message sign
7. Store a minimum of 100 preprogrammed messages for display when called up by an operator through the keyboard
8. Store a minimum of 50 user originated messages
9. Maintain and display a stored message list
10. Provide access coding or key entry for changing user oriented messages.
11. Provide control programming to present sequenced messages under operator control through keyboard entry
12. Provide control for moving arrow displays
13. Be capable of connection with, communication through, and complete control via a dial-up telephone line or cellular telephone as an option at the time of purchase or as a retrofit after purchase
14. Be capable of time-of-day operation to change or display messages with programming for a minimum of one year
1. Electric starting capability
2. Engine manufacturer's recommended fuel and oil filters
3. A fuel tank sized for a minimum of 5 days of continuous operation
4. Circuit breaker protection and voltage regulation for the generator or alternator
5. An audible warning prior to automatic engine startup
6. Gages including fuel level, engine hours, and battery voltages
1. The computer and control compartment
2. The engine and generator compartment
3. The battery compartment
4. The fuel tank
5. The external 120 V utility hookup connection
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be measured by the number of units installed, maintained, and removed. Changeable message signs will be measured by the number of units furnished, installed as shown on the plans or as directed, and maintained in accordance with the manufacturer's recommendations. A maintenance log shall be kept for each sign.
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