Header
About this publication
Preface
1 Scope and general
1.1 Scope
1.2 Application
1.3 Normative references
1.4 Terms and definitions
2 Requirements
2.1 General
2.2 Luminance requirements for internally illuminated, fixed message type VWD
2.2.1 Mean luminance
2.2.2 Luminance ratios
2.2.3 Uniformity
2.3 Luminance requirements for LED matrix, fixed message type VWD
2.3.1 Mean luminance
2.3.2 Uniformity
2.4 Luminance requirements for programmable message type VWD
2.4.1 Mean luminance
2.4.2 Uniformity
2.4.3 Flashing messages
2.4.4 Fire safety text messages
2.5 Maximum rated viewing distance
2.6 Countdown timer — optional function
2.7 Ancillary functions — optional
2.8 Supervision of detachable devices
2.9 Environmental classification
2.10 Flash rate — optional function
2.11 Synchronization — optional function
2.12 Remotely controlled VWD
2.13 Construction
2.13.1 Visual warning text contrast
2.13.2 Connecting facilities
2.13.3 Materials
2.13.4 Ingress protection
2.13.5 Access
2.13.6 Adjustments
2.14 Requirements for software controlled devices
3 Testing
3.1 General
3.1.1 Test specimens
3.1.2 Test schedule
3.2 Performance and variation in supply parameters
3.2.1 Objective of test
3.2.2 Test procedure
3.2.3 Requirements
3.3 Dry heat (operational)
3.3.1 General
3.3.2 Conditioning
3.4 Cold (operational)
3.4.1 General
3.4.2 Conditioning
3.5 Damp heat, cyclic (operational)
3.5.1 General
3.5.2 Conditioning
3.6 Damp heat, steady-state (endurance)
3.6.1 General
3.6.2 Conditioning
3.7 Electromagnetic compatibility (EMC) immunity tests (operational)
3.7.1 General
3.7.2 Conditioning
3.8 Exposure to simulated solar radiation (endurance) (option with requirements)
3.8.1 General
3.8.2 Objective of test
3.8.3 Test procedure
3.8.4 State of the specimen during exposure
3.8.5 Exposure
3.8.6 Measurements during exposure
3.8.7 Final measurements
3.8.8 Requirements
4 Test report
5 Markings
6 Data
Bibliography
