271
44. Subject independence, intersubjectivity of measurement (7.4.3): An overall
feature of measurement and its results, related to the extent to which the information conveyed by the measurement is interpretable in the same way by different persons in different places and times. Together with objectivity,
intersubjectivity characterizes trustworthy measurements [the VIM does not
define this concept].
45. Calibration (2.3): An empirical and informational process performed on a
measuring instrument for establishing a functional relation between the local
scale of the instrument and a public scale, and therefore aimed at providing the
traceability of measurement results obtained when using the instrument [analogous to the VIM definition [2.39]].
46. Metrological system (3.3.1): A scientific, technological, and organizational
system made of measurement standards and measuring instruments connected
in traceability chains, aimed at guaranteeing the metrological traceability of the
measurement results produced by such measuring instruments [the VIM does
not define this concept].
47. Metrological traceability (3.3.1): A feature of a measurement result of being
related to a reference property through a documented unbroken traceability
chain, each contributing to the calibration uncertainty [analogous to the VIM
definition [2.41]].
48. Traceability chain (3.3.1): A sequence of measurement standards terminated
by a measuring instrument, all connected by calibrations and aimed at relating
the measurement results produced by that instrument to the reference property
borne by the first standard of the sequence [analogous to the VIM definition
[2.42]].
49. Transducer, sensor (2.3): A device that may be put in interaction with an object
under measurement with respect to a property of the object, to which it is sensitive; as a result of the interaction, the device changes one of its properties, the
instrument indication. A transducer is the core component of a measuring
instrument (the concept is in fact more general: both sensors and
actuators are transducers) [analogous to the VIM definitions [3.7 and 3.8]].
50. Instrument indication (2.3): A property of a measuring instrument, changes of
which are causally dependent upon changes of the property to which the transducer of the instrument is sensitive, i.e., the property under measurement [analogous to the VIM definition [4.1]].
51. Affecting property (3.2): A property of the object under measurement or its
context, changes of which produce a change of the property under measurement
[the VIM does not define this concept].
52. Influence property (3.2): A property other than the property under measurement, changes of which produce a change in the behavior of the measuring
instrument [analogous to the VIM definition [2.52]].
53. Transduction function (7.2.3): A mathematical model of the behavior of the
transducer in a measuring instrument, such that the indication is a function of
the effective property and the influence properties [the VIM does not define this
concept].
Appendix A: A basic concept system of measurement
44. Subject independence, intersubjectivity of measurement (7.4.3): An overall
feature of measurement and its results, related to the extent to which the information conveyed by the measurement is interpretable in the same way by different persons in different places and times. Together with objectivity,
intersubjectivity characterizes trustworthy measurements [the VIM does not
define this concept].
45. Calibration (2.3): An empirical and informational process performed on a
measuring instrument for establishing a functional relation between the local
scale of the instrument and a public scale, and therefore aimed at providing the
traceability of measurement results obtained when using the instrument [analogous to the VIM definition [2.39]].
46. Metrological system (3.3.1): A scientific, technological, and organizational
system made of measurement standards and measuring instruments connected
in traceability chains, aimed at guaranteeing the metrological traceability of the
measurement results produced by such measuring instruments [the VIM does
not define this concept].
47. Metrological traceability (3.3.1): A feature of a measurement result of being
related to a reference property through a documented unbroken traceability
chain, each contributing to the calibration uncertainty [analogous to the VIM
definition [2.41]].
48. Traceability chain (3.3.1): A sequence of measurement standards terminated
by a measuring instrument, all connected by calibrations and aimed at relating
the measurement results produced by that instrument to the reference property
borne by the first standard of the sequence [analogous to the VIM definition
[2.42]].
49. Transducer, sensor (2.3): A device that may be put in interaction with an object
under measurement with respect to a property of the object, to which it is sensitive; as a result of the interaction, the device changes one of its properties, the
instrument indication. A transducer is the core component of a measuring
instrument (the concept
actuators are transducers) [analogous to the VIM definitions [3.7 and 3.8]].
50. Instrument indication (2.3): A property of a measuring instrument, changes of
which are causally dependent upon changes of the property to which the transducer of the instrument is sensitive, i.e., the property under measurement [analogous to the VIM definition [4.1]].
51. Affecting property (3.2): A property of the object under measurement or its
context, changes of which produce a change of the property under measurement
[the VIM does not define this concept].
52. Influence property (3.2): A property other than the property under measurement, changes of which produce a change in the behavior of the measuring
instrument [analogous to the VIM definition [2.52]].
53. Transduction function (7.2.3): A mathematical model of the behavior of the
transducer in a measuring instrument, such that the indication is a function of
the effective property and the influence properties [the VIM does not define this
concept].
Appendix A: A basic concept system of measurement