SN EN 50148 : 1995

1. Scope
2. Definitions
2.1 Electronic taximeters
2.2 Device constant k of the taximeter
2.3 Vehicle constant w
2.4 Totalizers
2.5 Initial hire fee
2.6 Initial distance
2.7 Initial time
2.8 Time-counting
2.9 Distance-counting
2.10 Time-distance counting
2.11 Single system calculation
2.12 Double system calculation
2.13 Maximum permissible error (MPE)
2.14 Distance measuring signal
2.15 Time measuring signal
2.16 Reference number of pulses
2.17 Tariff
2.18 Tariff values
2.19 Distance tariff value
2.20 Time tariff value
2.21 Tariff position
2.22 Tariff regulation
2.23 Supplement
2.24 Calculating device
2.25 Adjustment device
2.26 Securing
2.27 Sealing
3. Unit of measurement
4. Technical characteristics
4.1 Calculating device
4.1.1 Calculation methods
4.1.2 Price indication
4.1.3 Device constant
4.1.4 Tariff positions
4.2 Operating device
4.2.1 Operating position 'FOR HIRE'
4.2.2 Operating position 'OCCUPIED'
4.2.3 Operating position 'FARE'
4.2.4 Operating position 'MEASURE'
4.2.5 Restrictions
4.2.6 Supplement device
4.3 Indicating device
4.4 Totalizers
4.5 Tariff programming
4.5.1 Input tariff data
4.5.2 Display of tariff data
4.6 Test connector
4.7 Auxiliary devices
5. Design and constructional requirements
6. Operating characteristics
6.1 Voltage range
6.2 General properties
7. Maximum permissible errors
7.1 MPE of calculating device and time measuring
      signal
7.2 Tariff values used in the determination of
      errors
7.3 MPE of the adjustment device
8. Sealing
8.1 Mechanical sealing
8.2 Electronic sealing
9. Marking and other instrument information
10. Type tests
10.1 General
10.2 Test conditions
10.3 Conformity and document inspection
10.4 Function test
10.5 Function control
10.6 Visual inspection
10.7 Dry heat test
10.8 Damp heat test
10.9 Cold test
10.10 Vibration test
11. Electromagnetic compatibility
11.1 Immunity tests
11.1.1Voltage dips and interruptions on power lines
11.1.2Transients and surges on power lines
11.1.3Transients on signal lines
11.1.4Electromagnetic fields
11.5 Electrostatic discharges
11.2 Emission test

Applies to electronic taximeters to be installed on public hire vehicles. Does not deal with performance requirements of the taximeter after installation or with the installation itself.