ISO 12039:2019 定常発生源排出量 — 煙道ガス中の一酸化炭素、二酸化炭素、および酸素の質量濃度の決定 — 自動測定システムの性能特性 | ページ 6

3.1

analyser

analytical part in an extractive or in situ AMS (3.3)

3.2

automated measuring system

AMS

measuring system interacting with the flue gas under investigation, returning an output signal proportional to the physical unit of the measurand (3.8) in unattended operation

[SOURCE: ISO 9169:2006, 2.1.2 modified]

Note 1 to entry: In the sense of this document, an AMS is a system that can be attached to a duct or stack to continuously or intermittently measure the mass concentration of CO, CO₂ and O₂ passing through the duct.

3.3

in situ AMS

non-extractive systems that measure the concentration directly in the duct or stack

Note 1 to entry: In situ systems measure either across the stack or duct or at a point within the duct or stack.

3.4

parallel measurements

measurements taken on the same duct in the same sampling plane for the same period of time with the AMS (3.2) under test and with the reference method (3.12) at points a short distance from each other, providing pairs of measured values

3.5

interference

cross-sensitivity

negative or positive effect upon the response of the measuring system, due to a component of the sample that is not the measurand (3.8)

3.6

interferent

interfering substance

substance present in the air mass under investigation, other than the measurand (3.8) , that affects the response of AMS (3.2)

3.7

lack-of-fit

systematic deviation within the range of application between the measurement results obtained by applying the calibration function to the observed response of the measuring system, measuring reference materials (3.11) and the corresponding accepted value of such reference materials (3.11)

Note 1 to entry: Lack-of-fit may be a function of the measurement result.

Note 2 to entry: The expression “lack-of-fit” is often replaced in everyday language for linear relations by “linearity” or “deviation from linearity”.

[SOURCE: ISO 9169:2006, 2.2.9]

3.8

measurand

particular quantity subject to measurement

[SOURCE: ISO/IEC Guide 98 3:2008, B.2.9, modified — Example and Note removed.]

3.9

performance characteristic

one of the quantities assigned to equipment in order to define its performance

Note 1 to entry: Performance characteristics can be described by values, tolerances, or ranges.

3.10

period of unattended operation

maximum interval of time for which the performance characteristics (3.9) remain within a predefined range without external servicing, e.g. refill, adjustment

[SOURCE: ISO 9169:2006, 2.2.11]

Note 1 to entry: The period of unattended operation is often called maintenance interval.

3.11

reference material

substance or mixture of substances with a known concentration within specified limits, or a device of known characteristics

Note 1 to entry: Normally calibration gases, gas cells, gratings or filters are used.

[SOURCE: ISO 14385-1:2014]

3.12

reference method

measurement method taken as a reference by convention, which gives the accepted reference value of the measurand (3.8)

3.13

transport time

<measuring system> time period for transportation of the sampled gas from the inlet of the probe to the inlet of the measurement instrument

3.14

response time

time interval between the instant when a stimulus is subjected to bring about a specified abrupt change and the instant when the response reaches and remains within specified limits around its final stable value, determined as the sum of the lag time and the rise time in the rising mode, and the sum of the lag time and the fall time in the falling mode

[SOURCE: ISO 9169:2006, 2.2.4]

Note 1 to entry: Lag time, rise time and fall time are defined in ISO 9169:2006.

3.15

span gas

gas or gas mixture used to adjust and check the span point on the response line of the measuring system

Note 1 to entry: This concentration is often chosen around 70 % to 90 % of full scale.

3.16

span point

value of the output quantity (measured signal) of the automated measuring system (3.2) for the purpose of calibration, adjustment, etc. that represents a correct measured value generated by reference gas

3.17

standard uncertainty

uncertainty (3.18) of the result of a measurement expressed as a standard deviation

[SOURCE: ISO/IEC Guide 98 3:2008, 2.3.1]

3.18

uncertainty (of measurement)

parameter associated with the result of a measurement, that characterizes the dispersion of the values that could reasonably be attributed to the measurand (3.8)

[SOURCE: ISO/IEC Guide 98 3:2008, 2.2.3, modified — Note 1,2 and 3 removed.]

3.19

validation of automated measuring system

procedure to check the statistical relationship between values of the measurand (3.8) indicated by the automated measuring system (3.2) and the corresponding values given by parallel measurements (3.4) implemented simultaneously at the same measuring point

3.20

zero gas

gas or gas mixture used to establish the zero point (3.21) on a calibration curve within a given concentration range

3.21

zero point

specified value of the output quantity (measured signal) of the AMS (3.2) and which, in the absence of the measured component, represents the zero crossing of the calibration line. In case of O₂ monitoring AMS (3.2) , the zero point is interpreted as the lowest measurable value.