SN EN 61315 : 2006

SECTION 1: GENERAL
1.1 Introduction
1.2 Scope
1.3 Normative references
SECTION 2: BASIS OF CALIBRATIONS
2.1 Definitions
2.2 Mathematical basis
      2.2.1 Deviations and correction factors
      2.2.2 Systematic uncertainties
      2.2.3 Random uncertainties
      2.2.4 Accumulation of uncertainties
      2.2.5 Reporting
2.3 General advice for accurate measurements and
      calibrations
      2.3.1 Organization
      2.3.2 Calibration methods and procedure
      2.3.3 Advice for measurements and calibrations
      2.3.4 Recommendations to customers
SECTION 3: CALIBRATION AT REFERENCE CONDITIONS
Calibration at reference conditions
      3.1.1 Establishing the reference conditions
      3.1.2 Transfer and correction factor
      3.1.3 Uncertainty at reference conditions
3.2 Transfer-related correction factors and uncertainty
      3.2.1 Transfer-related correction factors and
              uncertainties caused by the parent meter
              3.2.1.1 Ageing (transfer-related correlation
                        factor and uncertainty of the
                        parent meter due to ageing)
              3.2.1.2 Temperature dependence (transfer-
                        related correction factor and
                        uncertainty of the parent meter
                        due to temperature dependence
              3.2.1.3 Nonlinearity (transfer-related
                        correction factor and uncertainty
                        of the parent meter due to
                        nonlinearity)
              3.2.1.4 Dependence on beam geometry (transfer-
                        related correction factor and
                        uncertainty of the parent meter due
                        to beam geometry)
              3.2.1.5 Dependence on multiple reflections
                        (transfer-related correction factor
                        and uncertainty of the parent meter
                        due to multiple reflections)
              3.2.1.6 Wavelength dependence (transfer-
                        related correction factor and
                        uncertainty of the parent meter due
                        to wavelength dependence)
              3.2.1.7 Dependence on spectral bandwidth
                        (transfer-related correction factor
                        and uncertainty of the parent meter
                        due to dependence on spectral
                        bandwidth)
              3.2.1.8 Other dependencies (transfer-related
                        correction factor and uncertainty
                        of the parent meter due to other
                        dependences)
              3.2.1.9 Dependence on state of polarization
      3.2.2 Transfer-related uncertainties caused by the
              test meter
              3.2.2.1 Temperature dependence (transfer-
                        uncertainty of the test meter due
                        to temperature dependences)
              3.2.2.2 Dependence on beam geometry (transfer
                        uncertainty of the test meter due to
                        to beam geometry)
              3.2.2.3 Dependence on multiple reflections
                        (transfer uncertainty of the test
                        meter due to multiple reflections)
              3.2.2.4 Wavelength dependence (transfer
                        uncertainty of the test meter due
                        to wavelength dependence)
              3.2.2.5 Dependence on spectral bandwidth
                        (transfer uncertainty of the test
                        meter due to spectral bandwith
              3.2.2.6 Dependence on state of polarization
                        (transfer uncertainty of the test
                        meter due to dependence on the
                        state of polarization)
              3.2.2.7 Other dependences (transfer
                        uncertainties of the test meter due
                        to other dependences)
      3.2.3 Corrections and systematic uncertainties due
              to extension
      3.2.4 Other corrections and systematic uncertainties
      3.2.5 Random uncertainty of comparison
      3.2.6 Other random uncertainties
3.3 Documentation
      3.3.1 Specifications
      3.3.2 Traceability information
SECTION 4: CALIBRATION FOR OPERATING CONDITIONS
4.1 Determining the total uncertainty
4.2 Determining the operational uncertainty
      4.2.1 Operational dependences and uncertainties
              4.2.1.1 Ageing
              4.2.1.2 Temperature dependence
              4.2.1.3 Nonlinearity
              4.2.1.4 Dependence on the type of fibre or
                        on the beam geometry
              4.2.1.5 Dependence on the connector-adaptor
                        combination
              4.2.1.6 Wavelength dependence
              4.2.1.7 Dependence on the spectral bandwidth
              4.2.1.8 Other dependences
4.3 Specifications
Figures
1 Systematic uncertainty, deviation and correction factor
    and how to replace the latter by an appropriately
    larger uncertainty
2 Measurement setup for sequential, fibre-based calibration
3 Example of a calibration chain and of the accumulation
    of uncertainties
4 Calculation of the test meter uncertainty at
    reference conditions
5 Change of condition and tolerance band as cause of
    transfer-related deviation and uncertainty of the
    parent meter
6 Determining and recording an operational uncertainty
7 Possible subdivision of the optical reference plane into
    10 x 10 squares, for the measurement of the spatial
    response
8 Forms that guide through the calibration at reference
    conditions of section 3
9 Forms that guide through the calibration for operating
    conditions of section 4
Annexes
A Forms and worksheets
B Bibliographic references
ZA (normative) Normative references to international
    publications with their corresponding European
    publications

                                         

                        
         
    

Applies to instruments measuring radiant power emitted from sources which are typical for the fibre-optic communications industry.