ISO 15239:2005 固体鉱物燃料—オンライン分析装置の測定性能の評価 | ページ 2

3.1

accuracy

closeness of agreement between an observation and the “true” value

[SOURCE:ISO 1213-2:1992]

3.2

analyser dynamic precision

closeness of agreement between analyser values, obtained from solid mineral fuel interrogated by the analyser under dynamic conditions and determined by a comparative test method which eliminates random errors attributable to the reference test method

3.3

analyser test method

method of analysis which gives, for a solid mineral fuel process stream, values arising from the operation of the on-line analyser, which are estimates of the true values for specified measurands

3.4

analyser value

value of a specified measurand in a test unit that is obtained from a test carried out by an analyser test method

3.5

backscatter geometry

arrangement of an interrogation process in which a source of incident energy and a detector system are on the same, or adjacent, sides of the solid mineral fuel passing through the interrogation zone

3.6

bias

systematic error which leads to the average value of a series of results being persistently higher or persistently lower than those which are obtained using a reference test method

[SOURCE:ISO 13909-1]

3.7

bias of scale

bias that varies as a function of the range of values measured

3.8

bias of location

bias that is constant and independent of the range of values measured

3.9

comparative dynamic precision

closeness of agreement between analyser values obtained from solid mineral fuel interrogated by the analyser under dynamic conditions and those determined by a comparative test method, which includes random errors attributable to the reference test method

3.10

comparative test method

method of testing in which analyser values are compared with corresponding reference values

3.11

comparison period

period of time, during which a test unit is interrogated by an analyser to give an analyser value and is sampled by a reference test method to obtain a reference value, for a measurand

Note 1 to entry: The period can be based on the typical time to produce a particular mass of solid mineral fuel, e.g. a trainload, or on a period which coincides with operations, e.g. a shift, or some other period that is convenient to, or preferred for, a specific evaluation procedure.

3.12

interrogation process

procedure which elicits from the solid mineral fuel process stream a measurable response related, specifically or by inference, to the quantity of the measurand

3.13

interrogation volume

volume of the solid mineral fuel process stream in which the detected response to the interrogation process originates

3.14

interrogation zone

part of the analyser installation through which the solid mineral fuel process stream passes and in which it is subjected to the interrogation process

3.15

mainstream configuration

configuration in which the whole of the process stream to be analysed is presented to, although not necessarily analysed by, an on-line analyser

3.16

on-line analyser

instrument for the measurement, continuously, of one or more quality indicators of solid mineral fuel while it is undergoing processing or handling, to give data rapidly and automatically

3.17

precision

closeness of agreement between independent results obtained under stipulated conditions

[SOURCE:ISO 3534-1:1993]

Note 1 to entry: For the purposes of this International Standard, the index of precision used is ± ts ここで, t is the value of Student's t (95 % confidence level, two-sided) and s is the standard deviation of the observations about the mean value.

3.18

reference test method

method of sampling, sample preparation and analysis which is expected to give, for a solid mineral fuel process stream, values which are unbiased estimates of the true values for specified measurands

3.19

reference value

value of a specified measurand in a test unit that is obtained from a test carried out by a reference test method and which serves as a reference for comparison with an analyser value

Note 1 to entry: For the purposes of this International Standard, reference values are considered to be conventional true values.

3.20

sample

quantity of fuel, representative of a larger mass, for which the quality is to be determined

[SOURCE:ISO 13909-1]

3.21

static repeatability

closeness of agreement between replicate analyser values obtained from a reference standard in the interrogation zone of the analyser

3.22

sub-stream configuration

configuration in which a part of the process stream to be analysed is diverted by means of a suitable sampling system for presentation to an on-line analyser

3.23

test unit

quantity of solid mineral fuel chosen for the determination of analyser and reference values

3.24

transmission geometry

arrangement of an interrogation process in which a source of incident energy and a detector system are on opposite sides of the solid mineral fuel passing through the interrogation zone.