EN 61115:1993
(Main)Expression of performance of sample handling systems for process analyzers
Expression of performance of sample handling systems for process analyzers
Specifies the tests which should be carried out to determine the functional performance of sample handling systems. In addition, specifies the information to be provided by the manufacturers and users of such systems. Applies to systems handling of gaseous or liquid samples for process analysers.
Angabe zum Betriebsverhalten von Probenhandlungssystemen für Prozeßanalysengeräte
Expression des qualités de fonctionnement des systèmes de manipulation d'échantillon pour analyseurs de processus
Spécifie les essais qui doivent être effectués pour déterminer les qualités de fonctionnement d'un système de manipulation d'échantillon ainsi que les informations qui doivent être fournies par les utilisateurs et les constructeurs de tels systèmes. S'applique aux systèmes de manipulation d'échantillons liquides ou gazeux.
Expression of performance of sample handling systems for process analyzers (IEC 61115:1992)
General Information
Standards Content (Sample)
SLOVENSKI STANDARD
01-november-1998
Expression of performance of sample handling systems for process analyzers
(IEC 61115:1992)
Expression of performance of sample handling systems for process analyzers
Angabe zum Betriebsverhalten von Probenhandlungssystemen für
Prozeßanalysengeräte
Expression des qualités de fonctionnement des systèmes de manipulation d'échantillon
pour analyseurs de processus
Ta slovenski standard je istoveten z: EN 61115:1993
ICS:
19.020 Preskuševalni pogoji in Test conditions and
postopki na splošno procedures in general
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
NORME CEI
INTERNATIONALE IEC
INTERNATIONAL
Première
édition
STANDARD
First edition
1992-03
Expression des qualités de fonctionnement
des systèmes de manipulation d'échantillon
pour analyseurs de processus
Expression of performance of sample
handling systems for process analyzers
© CEI 1992 Droits de reproduction réservés — Copyright - all rights reserved
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IEC 1115©IEC — 3 —
CONTENTS
Page
FOREWORD 5
INTRODUCTION 7
Clause
1. Scope and object 9
1.1 Scope 9
1.2 Object
2 Normative references
2.1 IEC standards
2.2 ISO standards
3 Definitions
3.1 General definitions
rtation and storage 25
3.2 Terms related to conditions of operation, transpo
rformance of sample handling
3.3 Terms related to the specification of the pe
systems and sample handling system components
4 Procedures for statements
Statements concerning the requirements for a sample handling system (user)
4.1
4.2 Statements concerning the requirements for a sample handling system
(manufacturer of process analyzer) 41
4.3 Statements concerning sample handling system components (manufacturer
43 of sample handling system components)
Statements concerning sample handling systems (manufacturer of sample
4.4
handling systems)
rformance characteristics 4.5 Statements on special pe
Annexes
Purpose, functions and properties of sample handling systems A
rt 59
B Operating groups and limit ranges of operation, storage and transpo
C Verification of time constants of a measuring system for process analysis
D Index of definitions
E Bibliography
IEC1115©IEC - 5 -
INTERNATIONAL ELECTROTECHNICAL COMMISSION
EXPRESSION OF PERFORMANCE OF
SAMPLE HANDLING SYSTEMS
FOR PROCESS ANALYZERS
FOREWORD
1) The formal decisions or agreements of the IEC on technical matters, prepared by Technical Committees on
which all the National Committees having a special interest therein are represented, express, as nearly as
possible, an international consensus of opinion on the subjects dealt with.
They have the form of recommendations for international use and they are accepted by the National
2)
Committees in that sense.
3) In order to promote international unification, the IEC expresses the wish that all National Committees
should adopt the text of the IEC recommendation for their national rules in so far as national conditions will
the lEC recommendation and the corresponding national rules should, as
permit. Any divergence between
far as possible, be clearly indicated in the latter.
This International Standard has been prepared by Sub-Committee 66D: Analyzing
equipment, of IEC Technical Committee No. 66: Electrical and electronic test and
measuring instruments, systems and accessories.
The text of this standard is based on the following documents:
DIS Report on Voting
66D(CO)12 66 D(CO)15
Full information on the voting for the approval of this standard can be found in the Voting
Report indicated in the above table.
Annexes A, B and C are normative and annexes D and E are informative.
In this standard, the following print types are used:
requirements and definitions: in roman type;
NOTES: in smaller roman type;
- terms used throughout this standard which have been defined in clause 3: bold
roman type.
— 7 —
IEC 1115©IEC
INTRODUCTION
Most process or environmental analyzers are designed to work within specified limits of
the properties of the sample fluid (e.g. pressure, dew-point) at the sample inlet as well as
the outlet [1,2]. Moreover, process analyzers may need auxiliary fluids or other utilities for
their correct function.
It is the purpose of a sample handling system to connect one or more process analyzers
with one or more source fluids and the environment, so that the requirements of the
analyzer are met, and so that it is possible for the analyzer to work properly over an
acceptable period of time with an economically justified amount of maintenance work.
(See annex A for the description of the purpose, functions and properties of sample
handling systems.)
Sample handling systems may fulfill the following functions [1]:
sample extraction;
sample transpo rt ;
sample conditioning;
exhaust stream disposal;
supply of utilities;
sample stream switching;
performance monitoring and control.
Some of the functions can be completely or partly fulfilled by components which are
integral parts of an analyzer or which are external to the sample handling system. For the
rt of the sample handling
purpose of this standard these components are not considered pa
system.
The design of a sample handling system depends on the properties of the source fluid, the
process analyzer, and the disposal points. Furthermore, the design depends on the proper-
ties required for the complete measuring device. Testing a sample handling system is very
impo rtant. Due to the variety of system configurations and requirements for a system,
many different test procedures are applied in practice, but in this standard only the test
procedures which are used in most cases are specified. User and manufacturer may agree
on additional test procedures, but these are not covered in this standard.
IEC 1115© IEC — 9 —
EXPRESSION OF PERFORMANCE OF
SAMPLE HANDLING SYSTEMS
FOR PROCESS ANALYZERS
1 Scope and object
1.1 Scope
This International Standard specifies the tests which should be carried out to determine
ormance of sample handling systems. In addition it specifies the infor-
the functional pe rf
mation to be provided by the manufacturers and users of such systems.
It is applicable to:
a) systems handling gaseous or liquid samples for process analyzers used for any
ultimate purpose, e.g. process control, emission, ambient air monitoring, etc.;
b) complete systems and system components;
c) power supplies and instrumentation for providing and controlling other utilities
necessary for process analyzers or sample handling system components, only in so far
as they are a functional part of the system;
d) facilities for maintaining system performance;
ormance of the process analyzer if these are part of
e) facilities for maintaining the pe rf
the sample handling system and not the analyzer.
NOTES
This standard has been prepared in accordance with the general principles set out in IEC 359.
2 Requirements for general principles concerning quantities, units and symbols are given in ISO 1000
and recommendations for the use of their multiples and of certain other units in ISO 31.
1.1.1 Aspects excluded from scope
This standard does not cover:
- general aspects of process analyzers (see IEC 746 for electrochemical analyzers);
NOTE - An IEC standard is in preparation for gas analyzers.
electric safety requirements (see IEC 348);
-11 -
IEC1115©IEC
safety aspects concerning explosive or toxic hazards;
- aspects concerning applications where regulations or legal metrology are involved,
such as atmospheric pollution. For such aspects more elaborate work going on inside
ISO such as ISO 6712 applies;
requirements for output signals (see IEC 381-1 and IEC 381-2);
influence of environmental conditions (see IEC 68).
1.1.2 Equipment excluded from scope
This standard does not apply to:
systems for handling solid samples;
equipment intended for use in explosive gas atmospheres (see IEC 79 parts 0 to
12).
1.2 Object
This standard is intended
- to specify and to unify the general aspects in the terminology and definitions related
to the functional performance of sample handling systems for process analyzers;
- to specify the tests which, in most cases, should be performed to determine the
ormance of sample handling systems;
functional pe rf
- to specify what information should be available for the manufacturer of sample
handling systems. This information may be provided by the user or the manufacturer of
process analyzers or by the manufacturer of sample handling system components;
- to specify what information should be available for the user of sample handling
systems.
2 Normative references
The following standards contain provisions which, through reference in this text, constitute
provisions of this International Standard. At the time of publication, the editions indicated
were valid. All standards are subject to revision, and parties to agreements based on this
International Standard are encouraged to investigate the possibility of applying the most
recent editions of the standards indicated below. Members of IEC and ISO maintain
registers of currently valid International Standards.
IEC1115©IEC - 13 --
2.1 IEC standards
IEC 359: 1987, Expression of the performance of electrical and electronic measuring
equipment.
2.2 ISO standards
ISO 31: Quantities and units - Parts 0 to 13.
SI units and recommendations for the use of their multiples and certain
ISO 1000: 1981,
other units.
NOTE - See annex E for informative references of ISO and IEC standards.
3 Definitions
3.1 General definitions
(See annex A and figures A.1 and A.2 for a description of sample handling systems.)
3.1.1 Process analyzer
An analytical instrument connected to a source fluid that automatically provides output
signals giving information in relation to a quantity of one or more components present in a
fluid mixture or in relation to physical or chemical properties of a fluid which depend on its
composition.
NOTE - For on-line or extractive process analyzers a sample stream is extracted from the source fluid and
analyzer the measurement is performed within the
transported to the analyzer. With an in-line or in situ
source fluid.
3.1.2 Sample handling system
A system which connects one or more process analyzers with the source fluid, disposal
points and utilities.
NOTES
1 A sample handling system may extract the required sample stream from one or more source fluids and
condition it in order to meet all the input requirements of the process analyzer so that an accurate measure-
ment of the properties under investigation is possible. The system may also ensure the appropriate
disposal of exhaust streams and the supply of utilities as necessary. Instrumentation for ensuring the
proper function of a sample handling system component or for facilitating maintenance work is considered
part of the sample handling system if it is a functional part of it.
2 See annex A and figures A.1 and A.2 for a description of sample handling systems.
3 Figure 1 gives a schematic example for the use of terms describing the functions of sample transport
and exhaust stream disposal.
3.1.3 Sample extraction
s of a sample handling system which extract the required sample
The function of those pa rt
stream from the source fluid.
NOTE - The sample stream should be extracted in such a way that it is truly representative of the source fluid.
IEC1115©IEC - 15 -
3.1.3.1 Source fluid
The source fluid (gas or liquid) from which the sample stream is extracted and of which the
composition or properties are to be measured.
NOTES
1 The source fluid may flow through a process line or fill a volume. Ambient air may also be the source
fluid.
2 The source fluid and the sample fluid in the sample line may consist of a combination of the following
components:
components to be measured;
irrelevant components;
obstructive components;
interfering components.
3.1.3.2 Component to be measured
The component or group of components of which a quantity (e.g. concentration) is to be
measured by the process analyzer.
3.1.3.3 Property to be measured
The physical or chemical property which is to be measured by the analyzer and which
depends on the composition of the source fluid.
3.1.3.4 Irrelevant components
The components which are not to be measured and which do not affect the performance of
the analyzer or of the sample handling system.
3.1.3.5 Obstructive components
The components which adversely affect the performance of the analyzer or of sample
handling system components.
The effect may be:
- physical (e.g. by dirtying windows in optical analyzers), or
- chemical (e.g. by corrosion), or
- by causing unacceptable errors (e.g. bubbles in a liquid sample stream for a
photometer).
Obstructive components can be solid, liquid or gaseous.
Interfering components
3.1.3.6
The components which give rise to interference errors in the analyzer.
IEC1115©IEC - 17 -
3.1.3.7 Sampling point
The point where the sample stream is extracted from the source fluid.
NOTE - It may be necessary to have a combination of sampling points at the inlet of a sample handling
system. The sample streams from different sampling points can be mixed or measured separately.
3.1.4 Sample transpo rt
The function of those pa rts of a sample handling system which transfer the sample fluid
from the sampling point to the inlet of the process analyzer.
3.1.4.1 Sample line
The connection from the sampling point(s) to the analyzer inlet in which a stream is
allowed to flow.
NOTE - Filters, coolers, pumps, flowmeters, etc. may be part of the sample line (see annex A, figure A.2).
3.1.4.2 Sample stream
The fluid stream in the sample line.
N
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