IEC 61315:2019 pdf download

IEC 61315:2019 pdf download.Calibration of fibre-optic power meters
1 Scope
This document is applicable to instruments measuring radiant power emitted from sources that are typical for the fibre-optic communications industry. These sources include laser diodes, light emitting diodes (LEDs) and fibre-type sources. Both divergent and collimated radiations are covered. This document defines the calibration of power meters to be performed by calibration laboratories or by power meter manufacturers.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. IEC 60793-2, Optical fibres – Part 2: Product specifications – General IEC TR 61 931 :1 998, Fibre optic – Terminology ISO/IEC Guide 98-3:2008, Uncertainty of measurement – Part 3: Guide to the expression of uncertainty in measurement (GUM:1995)
3 Terms and definitions
For the purposes of this document, the terms and definitions given in IEC TR 61 931 and the following apply. ISO and IEC maintain terminological databases for use in standardization at the following addresses: • IEC Electropedia: available at http://www.electropedia.org/ • ISO Online browsing platform: available at http://www.iso.org/obp 3.1 accredited calibration laboratory calibration laboratory authorized by the appropriate national organization to issue calibration certificates with a minimum specified uncertainty, which demonstrate traceability to national standards (3.1 4) 3.2 adjustment set of operations carried out on an instrument in order that it provides given indications corresponding to given values of the measurand Note 1 to entry: When the instrument is made to give a null indication corresponding to a null value of the measurand, the set of operations is called zero adjustment. Note 2 to entry: For more information, see ISO/IEC Guide 99:2007, 3.1 1 .3.3 calibration set of operations that establish, under specified conditions, the relationship between the values of quantities indicated by a measuring instrument and the corresponding values realized by measurement standards Note 1 to entry: The result of a calibration permits either the assignment of values of measurands to the indications or the determination of corrections with respect to indications. Note 2 to entry: A calibration may also determine other metrological properties such as the effect of influence quantities. Note 3 to entry: The result of a calibration may be recorded in a document, sometimes called a calibration certificate or a calibration report. Note 4 to entry: See also ISO/IEC Guide 99:2007, 2.39. 3.4 calibration conditions conditions of measurement in which the calibration is performed
3.9 excitation <fibre> description of the distribution of optical power between the modes in the fibre Note 1 to entry: In context with multimode fibres, the fibre excitation is described by a) the spot diameter (3.31 ) on the surface of the fibre end, and b) the numerical aperture (3.1 7) of the radiation emitted from the fibre. Single-mode fibres are generally assumed to be excited by only one mode (the fundamental mode). 3.10 instrument state set of parameters that can be chosen on an instrument Note 1 to entry: Typical parameters of the instrument state are the optical power range, the wavelength setting, the display measurement unit and the output from which the measurement result is obtained (for example, display, interface bus, analogue output).3.13 measuring range set of values of measurands for which the error of a measuring instrument is intended to lie within specified limits Note 1 to entry: In this document, the measuring range is the range of radiant power (part of the operating range), for which the uncertainty at operating conditions is specified. The term “dynamic range” should be avoided in this context. Note 2 to entry: For more information, see ISO/IEC Guide 99:2007, 4.7. 3.14 national measurement standard national standard standard recognized by a national decision to serve in a country as the basis for assigning values to other standards of the quantity concerned Note 1 to entry: For more information, see ISO/IEC Guide 99:2007, 5.3. 3.15 national standards laboratory laboratory which maintains the national standard (3.1 4)