ISO 2808:2019 塗料とワニス—膜厚の決定 | ページ 6

3.1

film thickness

distance between the surface of the film and the surface of the substrate

3.2

wet-film thickness

thickness of a freshly applied wet coating material, measured immediately after application

3.3

dry-film thickness

thickness of a coating remaining on the surface when the coating has hardened

3.4

thickness of uncured powder layer

thickness of a freshly applied coating material in powder form, measured immediately after application and before stoving

3.5

relevant surface area

part of an object covered or to be covered by the coating and for which the coating is essential for serviceability and/or appearance

Note 1 to entry: Measurement of this property is only required for the extended evaluation of film thickness measurements; see Clause 7, k) and l).

3.6

test area

representative part of the relevant surface area within which an agreed number of single measurements is made as a spot‑check

Note 1 to entry: Measurement of this property is only required for the extended evaluation of film thickness measurements; see Clause 7, k) and l).

3.7

measurement area

area over which a single measurement is made

Note 1 to entry: Measurement of this property is only required for the extended evaluation of film thickness measurements; see Clause 7, k) and l).

3.8

minimum local film thickness

lowest value of the local film thickness found on the relevant surface area of a particular test specimen

Note 1 to entry: Measurement of this property is only required for the extended evaluation of film thickness measurements; see Clause 7, k) and l).

3.9

maximum local film thickness

highest value of the local film thickness found on the relevant surface area of a particular test specimen

Note 1 to entry: Measurement of this property is only required for the extended evaluation of film thickness measurements; see Clause 7, k) and l).

3.10

mean film thickness

arithmetic mean of all the individual dry-film thicknesses (3.3) in the test area or the result of a gravimetric determination of the thickness

Note 1 to entry: Measurement of this property is only required for the extended evaluation of film thickness measurements; see Clause 7, k) and l).

3.11

calibration

operation that, under specified conditions, in a first step, establishes a relation between the quantity values with measurement uncertainties provided by measurement standards and corresponding indications with associated measurement uncertainties and, in a second step, uses this information to establish a relation for obtaining a measurement result from an indication

Note 1 to entry: A calibration may be expressed by a statement, calibration function, calibration diagram, calibration curve, or calibration table. In some cases, it may consist of an additive or multiplicative correction of the indication with associated measurement uncertainty.

Note 2 to entry: Calibration should not be confused with adjustment of a measuring system, often mistakenly called"self-calibration", nor with verification of calibration.

Note 3 to entry: Often, the first step alone in the above definition is perceived as being calibration.

[SOURCE:ISO/IEC Guide 99:2007, 2.39]

3.12

verification

provision of objective evidence that a given item fulfils specified requirements

Note 1 to entry: When applicable, measurement uncertainty should be taken into consideration.

Note 2 to entry: The item may be, e.g. a process, measurement procedure, material, compound, or measuring system.

Note 3 to entry: The specified requirements may be, e.g. that a manufacturer's specifications are met.

Note 4 to entry: Verification in legal metrology, as defined in VIML, and in conformity assessment in general, pertains to the examination and marking and/or issuing of a verification certificate for a measuring system.

Note 5 to entry: Verification should not be confused with calibration. Not every verification is a validation.

Note 6 to entry: In chemistry, verification of the identity of the entity involved, or of activity, requires a description of the structure or properties of that entity or activity.

[SOURCE:ISO/IEC Guide 99:2007, 2.44]

3.13

reference material

rm

material, sufficiently homogeneous and stable with reference to specified properties, which has been established to be fit for its intended use in measurement or in examination of nominal properties

Note 1 to entry: Examination of a nominal property provides a nominal property value and associated uncertainty. This uncertainty is not a measurement uncertainty.

Note 2 to entry: Reference materials with or without assigned quantity values can be used for measurement precision control whereas only reference materials with assigned quantity values can be used for calibration or measurement trueness control.

Note 3 to entry:"Reference material" comprises materials embodying quantities as well as nominal properties.

Note 4 to entry: A reference material is sometimes incorporated into a specially fabricated device.

Note 5 to entry: Some reference materials have assigned quantity values that are metrologically traceable to a measurement unit outside a system of units. Such materials include vaccines to which International Units (IU) have been assigned by the World Health Organization.

Note 6 to entry: In a given measurement, a given reference material can only be used for either calibration or quality assurance.

Note 7 to entry: The specifications of a reference material should include its material traceability, indicating its origin and processing (Accred. Qual. Assur.:2006).

Note 8 to entry: ISO/REMCO has an analogous definition but uses the term"measurement process" to mean"examination" (ISO 15189:2007, 3.4), which covers both measurement of a quantity and examination of a nominal property.

Note 9 to entry: Reference materials may be coated thickness standards, or shims. If agreed to by the contracting parties, a part of the test specimen may be used as a thickness standard for a particular job.

[SOURCE:ISO/IEC Guide 99:2007, 5.13, modified — Note 9 to entry has been added.]

3.14

adjustment

adjustment of a measuring system

set of operations carried out on a measuring system so that it provides prescribed indications corresponding to given values of a quantity to be measured

Note 1 to entry: Types of adjustment of a measuring system include zero adjustment of a measuring system, offset adjustment, and span adjustment (sometimes called gain adjustment).

Note 2 to entry: Adjustment of a measuring system should not be confused with calibration, which is a prerequisite for adjustment.

Note 3 to entry: After an adjustment of a measuring system, the measuring system must usually be recalibrated.

Note 4 to entry: Most digital measurement instruments can be adjusted on a thickness standard or on a shim ここで, the thickness of the coating or of the shim is known.

[SOURCE:ISO/IEC Guide 99:2007, 3.11, modified — Note 4 to entry has been added and “adjustment” is used as the first preferred term.]

3.15

accuracy

measurement accuracy

accuracy of measurement

closeness of agreement between a measured quantity value and a true quantity value of a measurand

Note 1 to entry: The concept"measurement accuracy" is not a quantity and is not given a numerical quantity value. A measurement is said to be more accurate when it offers a smaller measurement error.

Note 2 to entry: The term"measurement accuracy" should not be used for measurement trueness and the term measurement precision should not be used for ‘measurement accuracy’, which, however, is related to both these concepts.

Note 3 to entry:"Measurement accuracy" is sometimes understood as closeness of agreement between measured quantity values that are being attributed to the measurand.

[SOURCE:ISO/IEC Guide 99:2007, 2.13, modified — “accuracy” is used as the preferred term.]