EN 13848-3:2009

Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols and abbreviations
5 Track geometry measuring system fitted on track
  construction and maintenance machines
  5.1 General description
  5.2 Environmental conditions
  5.3 Track features input
  5.4 Data localisation
  5.5 Measuring system/device
  5.6 Data processing
  5.7 Data output
  5.8 Data storage
6 Testing of track geometry measuring and recording system
  6.1 Introduction
  6.2 Calibration
  6.3 Validation by field tests
  6.4 Routine validation
Annex A (normative) - Parameters measured by track
        construction and maintenance machine
      A.1 Introduction
      A.2 Track gauge
      A.3 Longitudinal level
      A.4 Cross level
      A.5 Alignment
      A.6 Twist
Annex B (informative) - Principles of measurement
      B.1 General Description
      B.2 Longitudinal level and alignment
      B.3 Track gauge
      B.4 Cross level
      B.5 Twist
Annex C (normative) - Description of field tests: values
        to be respected
      C.1 General
      C.2 Repeatability
      C.3 Reproducibility
Bibliography

This European Standard specifies the minimum requirements that shall be met by measuring systems fitted on track construction and maintenance machines to give an evaluation of track geometry quality when measuring one or more of the parameters described in EN 13848-1. It does not seek to prescribe which parameters are to be measured, since these depend upon the measuring capabilities of the machine and the purpose for which the machine or its measuring system is used.It also sets out the acceptable differences from EN 13848-1 when using track construction and maintenance machines to measure track geometry. It applies to track geometry measuring systems which are fitted to track construction and maintenance machines from one year after the date of implementation of this standard.