Specifies requirements for the design, construction and performance of electronic sensing equipment used in traffic control and counting systems for the detection of vehicles. It applies primarily to detector sensors of the permanently installed type associated with road traffic signal installations.
Table of contents
Header
About this publication
Preface
1 Scope and general
1.1 Scope
1.2 Referenced documents
1.3 Definitions
2 Mechanical and physical requirements
2.1 Construction
2.2 Overall dimensions
2.2.1 Independent sensor units
2.2.2 Rack-mounted sensor units
2.2.3 Integrated loop detectors
2.3 Marking
2.4 Provision of information
3 Electrical requirements
3.1 Power supply
3.1.1 Independent sensor units
3.1.2 Rack-mounted sensor units
3.1.3 Integrated loop detectors
3.2 Protection
3.3 Electromagnetic compatibility
3.4 Indicator
3.5 Switches and adjustment facilities
3.5.1 General
3.5.2 Sensitivity control
3.5.3 Manual retune facility
3.6 Connection facilities for independent sensor units
3.6.1 Types of connection
3.6.2 Sensor units without separate LV and ELV connectors
3.6.3 Separate LV and ELV connectors
3.6.4 Provision of connecting leads
3.7 Connection facilities for rack-mounted sensor units
3.8 Connection facilities for integrated loop detectors
3.9 Reliability
4 Operational performance
4.1 Basis for specified performance
4.2 Inductance range
4.3 Minimum actuation
4.4 Maximum actuation
4.5 Sensitivity settings
4.6 Response time
4.7 Turn-off time
4.8 Recovery time
4.9 Presence time
4.9.1 Stationary vehicles
4.9.2 Slowly moving queue of vehicles
4.10 Paralysis time
4.11 Passage detector output
4.12 Output characteristics
4.12.1 Types of output
4.12.2 Relay output
4.12.3 Solid-state output
4.13 Automatic drift compensation (tracking)
4.14 Initial power-up or interruption to electricity supply
4.15 Recovery from positive inductance change
4.16 Failure mode
4.17 Surge protection
4.18 Variation in operating conditions
4.19 Susceptibility to interference
4.20 Interaction (crosstalk)
4.21 Leakage to earth
4.22 Operation with trams
5 Specific requirements for integrated detector modules
5.1 System configuration
5.2 Functional requirements
5.2.1 General
5.2.2 Scanning of detector channels
5.2.3 Detector type
5.2.4 Configuration parameters
5.2.5 Channel control switches and indicators
5.2.6 Monitoring
5.2.7 Beeper
5.2.8 Retuning of detector channels
5.2.9 Event log
5.3 User interface
5.3.1 Display/alter configuration parameters
5.3.2 Display operating parameters
5.3.3 Retune detector channels
5.3.4 Specify detector channel for the beeper
5.3.5 Display/clear detector module log
5.3.6 Display electronic identity
5.4 Electronic identity
5.4.1 General
5.4.2 Text string data
5.4.2.1 Type or model number and hardware revision
5.4.2.2 Serial number
5.4.2.3 Firmware revision
5.4.3 Numerical data
5.4.3.1 Type or model number and hardware revision
5.4.3.2 Serial number
5.4.3.3 Firmware revision
5.5 Diagnostic port
Appendix A
A1 Scope
A2 Response times
A3 Recovery time
A4 Presence time
A5 Paralysis time
Appendix B
B1 Scope
B2 Test apparatus
B2.1 Apparatus required
B2.2 Variable frequency oscillator
B2.3 Power supply
B2.4 Vehicle loop simulator
B2.5 Vehicle simulator
B2.6 Second vehicle simulator
B2.7 Interference source
B2.8 Counters
B2.9 Oscilloscope
B2.10 Environmental chamber
B3 Calibration and preconditioning
B4 Test procedures and criteria
B4.1 Testing of multi-channel detector sensors
B4.2 Test for inductance range and normal operation
B4.2.1 Object
B4.2.2 Procedure
B4.2.3 Criteria
B4.3 Test for minimum and maximum actuation, response time and counting reliability
B4.3.1 Object
B4.3.2 Procedure
B4.3.3 Criteria
B4.4 Test for response time and turn-off time
B4.4.1 Object
B4.4.2 Procedure
B4.4.3 Criteria
B4.5 Test for presence time and/or paralysis times
B4.5.1 Object
B4.5.2 Procedure
B4.5.3 Criteria
B4.6 Test for supply failure and loop failure
B4.6.1 Object
B4.6.2 Procedure
B4.7 Test for automatic drift compensation (tracking)
