SIST EN IEC 62828-2:2018

SLOVENSKI STANDARD
SIST EN IEC 62828-2:2018
01-junij-2018
Referenčni pogoji in postopki za preskušanje industrijskih in procesnih merilnih
oddajnikov - 2. del: Posebni postopki za dajalnike tlaka (IEC 62828-2:2017)
Reference conditions and procedures for testing industrial and process measurement
transmitters - Part 2: Specific procedures for pressure transmitters (IEC 62828-2:2017)
Referenzbedingungen und Testmethoden für Industrie- und
Prozessmessgrößenumformer - Teil 2: Spezielle Testmethoden für Druckmessumformer
(IEC 62828-2:2017)
Conditions de référence et procédures pour l'essai des transmetteurs de mesure
industrielle et de processus - Partie 2: Procédures spécifiques pour les transmetteurs de
pression (IEC 62828-2:2017)
Ta slovenski standard je istoveten z: EN IEC 62828-2:2018
ICS:
17.100 Merjenje sile, teže in tlaka Measurement of force,
weight and pressure
25.040.40 Merjenje in krmiljenje Industrial process
industrijskih postopkov measurement and control
SIST EN IEC 62828-2:2018 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN IEC 62828-2:2018

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SIST EN IEC 62828-2:2018


EUROPEAN STANDARD EN IEC 62828-2

NORME EUROPÉENNE

EUROPÄISCHE NORM
February 2018
ICS 17.100; 25.040.40

English Version
Reference conditions and procedures for testing industrial and
process measurement transmitters - Part 2: Specific procedures
for pressure transmitters
(IEC 62828-2:2017)
Conditions de référence et procédures pour l'essai des Referenzbedingungen und Testmethoden für Industrie- und
transmetteurs de mesure industrielle et de processus - Prozessmessgrößenumformer - Teil 2: Spezielle
Partie 2: Procédures spécifiques pour les transmetteurs de Testmethoden für Druckmessumformer
pression (IEC 62828-2:2017)
(IEC 62828-2:2017)
This European Standard was approved by CENELEC on 2017-12-12. CENELEC members are bound to comply with the CEN/CENELEC
Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.
Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC
Management Centre or to any CENELEC member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the
same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden,
Switzerland, Turkey and the United Kingdom.



European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2018 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
 Ref. No. EN IEC 628208-2:2018 E

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SIST EN IEC 62828-2:2018
EN IEC 62828-2:2018 (E)

European foreword
The text of document 65B/1098/FDIS, future edition 1 of IEC 62828-2, prepared by IEC/SC 65B
"Measurement and control devices, of IEC technical committee 65: Industrial-process measurement,
control and automation" was submitted to the IEC-CENELEC parallel vote and approved by
CENELEC as EN IEC 62828-2:2018.

The following dates are fixed:
(dop) 2018-09-12
• latest date by which the document has to be
implemented at national level by
publication of an identical national
standard or by endorsement
• latest date by which the national (dow) 2020-12-12
standards conflicting with the
document have to be withdrawn


Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.

Endorsement notice
The text of the International Standard IEC 62828-2:2017 was approved by CENELEC as a European
Standard without any modification.
In the official version, for Bibliography, the following notes have to be added for the standards indicated:

IEC 60770 (all parts) NOTE Harmonized as EN 60770 (all parts).
IEC 61298 (all parts) NOTE Harmonized as EN 61298 (all parts).
IEC 61518:2000 NOTE Harmonized as EN 61518:2001(not modified).
corrigendum Feb. 2002.
IEC 61987-13:2016 NOTE Harmonized as EN 61987-13:2016 (not modified).
IEC 62828 (all parts) NOTE Harmonized as EN 62828 (all parts).

2

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EN IEC 62828-2:2018 (E)
Annex ZA
(normative)

Normative references to international publications
with their corresponding European publications

The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments)
applies.

NOTE 1  Where an International Publication has been modified by common modifications, indicated by (mod), the relevant
EN/HD applies.

NOTE 2  Up-to-date information on the latest versions of the European Standards listed in this annex is available here:
www.cenelec.eu.

Publication Year Title EN/HD Year
IEC 62828-1 -  Reference conditions and procedures for EN IEC 62828-1 -
testing industrial and process
measurement transmitters - Part 1:
General procedures for all types of
transmitters


3

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SIST EN IEC 62828-2:2018




IEC 62828-2

®


Edition 1.0 2017-11




INTERNATIONAL



STANDARD




NORME



INTERNATIONALE
colour

inside










Reference conditions and procedures for testing industrial and process

measurement transmitters –

Part 2: Specific procedures for pressure transmitters




Conditions de référence et procédures pour l’essai des transmetteurs de

mesure industrielle et de processus –


Partie 2: Procédures spécifiques pour les transmetteurs de pression












INTERNATIONAL

ELECTROTECHNICAL

COMMISSION


COMMISSION

ELECTROTECHNIQUE


INTERNATIONALE




ICS 17.100; 25.040.40 ISBN 978-2-8322-4850-8



Warning! Make sure that you obtained this publication from an authorized distributor.

Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé.

® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale

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– 2 – IEC 62828-2:2017  IEC 2017
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 7
3.1 General . 7
3.2 Terms related the process conditions . 9
4 General description of the device and overview . 9
5 Reference test conditions . 9
6 Test procedures . 10
6.1 General . 10
6.2 Tests at standard and operating reference test conditions. 10
6.2.1 General . 10
6.2.2 Accuracy test suitable for routine and acceptance tests . 10
6.2.3 Overpressure . 11
6.2.4 Influence of static pressure . 13
6.2.5 Long-term drift . 15
6.2.6 Leakage test . 16
6.2.7 Additional tests for diaphragm/remote seals – Influence of process
temperature (long term) . 16
7 Test report and technical documentation . 16
7.1 General . 16
7.2 Total probable error . 17
Annex A (informative) Relationship between the SI unit and other pressure related
units . 18
Annex B (informative) Pressure process measurement transmitter (PMT) . 19
B.1 General description of a pressure PMT . 19
B.2 Typical PMTs . 19
Annex C (informative) Example of signal current range for a 4 to 20 mA PMT . 21
C.1 Signal current range of a 4 mA to 20 mA transmitter (before adjustment) . 21
C.2 Proportional range . 21
C.3 Normal range . 21
C.4 Underrange . 21
C.5 Overrange . 22
C.6 Low alarm . 22
C.7 High alarm . 22
Bibliography . 23

Figure 1 – Measuring range and associated properties of a pressure PMT . 8
Figure 2 – Schematic example of a test set-up for pressure PMT . 10
Figure 3 – Example of measured error plot . 11
Figure 4 – Procedure for the determination of the unilateral overpressure error . 12
Figure 5 – Schematic example of test set-up for determine the effect of the static
pressure . 13
Figure 6 – Procedure for the determination of the zero point error with static pressure . 14

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IEC 62828-2:2017  IEC 2017 – 3 –
Figure 7 – Procedure for the determination of the span error for static pressure . 15
Figure B.1 – Schematic example of intelligent PMT model . 20
Figure C.1 – Signal current range of a 4 mA – 20 mA transmitter (before adjustment) . 21

Table 1 – Example of measured errors. 11
Table A.1 – Relationship between the SI unit and other pressure related units. 18

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INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________

REFERENCE CONDITIONS AND PROCEDURES FOR TESTING INDUSTRIAL
AND PROCESS MEASUREMENT TRANSMITTERS –

Part 2: Specific procedures for pressure transmitters

FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as "IEC
Publication(s)"). Their preparation is entrusted to technical committees; any IEC National Committee interested
in the subject dealt with may participate in this preparatory work. International, governmental and non-
governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely
with the International Organization for Standardization (ISO) in accordance with conditions determined by
agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence
between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
the latter.
5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 62828-2 has been prepared by subcommittee 65B: Measurement
and control devices, of IEC technical committee 65: Industrial-process measurement, control
and automation.
The text of this International Standard is based on the following documents:
FDIS Report on voting
65B/1098/FDIS 65B/1101/RVD

Full information on the voting for the approval of this International Standard can be found in
the report on voting indicated in the above table.
This document has been drafted in accordance with the ISO/IEC Directives, Part 2.
This International Standard is to be used in conjunction with IEC 62828-1:2017.

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SIST EN IEC 62828-2:2018
IEC 62828-2:2017  IEC 2017 – 5 –
A list of all parts in the IEC 62828 series, published under the general title Reference
conditions and procedures for testing industrial and process measurement transmitters, can
be found on the IEC website.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under "http://webstore.iec.ch" in the data related to
the specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.

IMPORTANT – The 'colour inside' logo on the cover page of this publication indicates
that it contains colours which are considered to be useful for the correct
understanding of its contents. Users should therefore print this document using a
colour printer.

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INTRODUCTION
Most of the current IEC standards on industrial and process measurement transmitters are
rather old and were developed having in mind devices based on analogue technologies.
Today’s digital industrial and process measurement transmitters are quite different from those
analogue transmitters: they include more functions and newer interfaces, both towards the
computing section (mostly digital electronic) and towards the measuring section (mostly
mechanical). Even if some standards dealing with digital process measurement transmitters
already exist, they are not sufficient, since some aspects of the performance are not covered
by appropriate test methods.
In addition, existing IEC test standards for industrial and process measurement transmitters
are spread over many documents, so that for manufacturers and users it is difficult,
impractical and time-consuming to identify and select all the standards to be applied to a
device measuring a specific process quantity (pressure, temperature, flow, level, etc.).
To help manufacturers and users, it was decided to review, complete and reorganize the
relevant IEC standards and to create a more suitable, effective and comprehensive standard
series that provides in a systematic way all the necessary specifications and tests required for
different industrial and process measurement transmitters.
To solve the issues mentioned above and to provide an added value for the stakeholders, the
new standard series on industrial and process measurement transmitters covers the following
main aspects:
• applicable normative references;
• specific terms and definitions;
• typical configurations and architectures for the various types of industrial and process
measurement transmitters;
• hardware and software aspects;
• interfaces (to the process, to the operator, to the other measurement and control devices);
• physical, mechanical and electrical requirements and relevant tests; clear definition of the
test categories: type tests, acceptance tests and routine tests;
• performance (its specification, tests and verification);
• environmental protection, hazardous areas application, functional safety, etc.;
• structure of the technical documentation.
To cover in a systematic way all the topics to be addressed, the standard series is organized
in several parts. At the moment of the publication of this document, the IEC 62828 series
consists of the following parts:
• IEC 62828-1: General procedures for all types of transmitters
• IEC 62828-2: Specific procedures for pressure transmitters
• IEC 62828-3: Specific procedures for temperature transmitters
• IEC 62828-4: Specific procedures for level transmitters
• IEC 62828-5: Specific procedures for flow transmitters
In preparing IEC 62828 (all parts), many test procedures were taken, with the necessary
improvements, from IEC 61298 (all parts). As IEC 61298 (all parts) is currently applicable to
all process measurement and control devices, when IEC 62828 (all parts) is completed,
IEC 61298 (all parts) will be revised to harmonise it with IEC 62828 (all parts), taking out from
its scope the industrial and process measurement transmitters. During the time when the
scope of IEC 61298 (all parts) is being updated, the new IEC 62828 series takes precedence
for industrial and process measurement transmitters.

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IEC 62828-2:2017  IEC 2017 – 7 –
REFERENCE CONDITIONS AND PROCEDURES FOR TESTING INDUSTRIAL
AND PROCESS MEASUREMENT TRANSMITTERS –

Part 2: Specific procedures for pressure transmitters



1 Scope
This part of IEC 62828 establishes specific procedures for testing pressure process
measurement transmitters (PMT) used in measuring and control systems for industrial
processes and for machinery control systems.
A pressure PMT can feature a remote seal to bring the process variable to the sensing
element in the PMT. When the remote seal cannot be separated from the PMT, the complete
device is tested.
For general test procedures, reference is made to IEC 62828-1, which is applicable to all
types of process measurement transmitters.
NOTE In industrial and process applications, to indicate the process measurement transmitters, it is common also
to use the terms "industrial transmitters", or "process transmitters".
2 Normative references
The following documents are referred to in the text in such a way that some or all of their
content constitutes requirements of this document. For dated references, only the edition
cited applies. For undated references, the latest edition of the referenced document (including
any amendments) applies.
IEC 62828-1, Reference conditions and procedures for testing industrial and process
measurement transmitters – Part 1: General procedures for all types of transmitters
3 Terms and definitions
For the purposes of this document, the terms and definitions given in IEC 62828-1 and the
following apply.
ISO and IEC maintain terminological databases for use in standardization at the following
addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
3.1 General
3.1.1
absolute pressure
p
abs
pressure using absolute vacuum as the datum point
Note 1 to entry: The CDD code of this entry for Electronic Data Exchange is ABB181.
3.1.2
ambient atmospheric pressure
p
amb
pressure exerted by the atmospheric air at a given altitude and temperature
Note 1 to entry: The atmospheric pressure decreases with the altitude by about 10 Pa/m (Pascal per metre).

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3.1.3
differential pressure
∆p
p
1,2
difference between the two (absolute) pressures that act simultaneously on opposite sides of
a membrane or a primary element
Note 1 to entry: The CDD code of this entry for Electronic Data Exchange is ABB995.
3.1.4
gauge pressure
p
g
pressure using atmospheric pressure as the datum point
p = p – p
g abs amb
Note 1 to entry: Gauge pressure assumes positive values when the absolute pressure is greater than the ambient
atmospheric pressure; it assumes negative values when the absolute pressure is less than the ambient
atmospheric pressure.
Note 2 to entry: In certain industrial environments, "gauge pressure" may be referred to as "pressure".
Note 3 to entry: The term "relative pressure" to indicate gauge pressure is obsolete and conceptually wrong, so it
should be avoided.
Note 4 to entry:Tthe CDD code of this entry for Electronic Data Exchange is ABB182.
3.1.5
line pressure
static pressure
pressure applied on both sides of a differential pressure PMT
Note 1 to entry: For differential pressure PMTs, it is an influence factor that is bilateral and does not represent the
measurand.
3.1.6
leakage rate
leakage, permeation and/or diffusion effects of the medium through the PMT and/or its
mounting devices over the testing period under static pressure conditions, expressed as
normal volume flow rate
Note 1 to entry: The CDD code of this entry for Electronic Data Exchange is ABD632.
3.1.7
measuring range
range related to the measurement of absolute and gauge pressure
PMTs
Note 1 to entry: For a pressure PMT with variable (adjustable or programmable) span, the measuring range and
associated terms are shown in Figure 2.
Note 2 to entry: See also Annex C for an example of signal current range of a 4 mA to 20 mA PMT.
Vacuum Burst pressure
Zero
MPa
Minimum overpressure limit Lower range Upper range Maximum overpressure limit
Lower limiting value limit (LRL) limit (URL) Upper limiting value
of process pressure Set span of process pressure
Lower range value (LRV)
Upper range value (URV)
Measuring range
(maximum span)
IEC

Figure 1 – Measuring range and associated properties of a pressure PMT

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3.1.8
overpressure limit
proof pressure
multiple of indicated range with which the device may be subjected to pressure without
permanent damage
Note 1 to entry: The output signal at the overpressure limit is sometimes unreliable and/or not predictable. The
specification applies to the maximum permitted medium temperature.
Note 2 to entry: After returning to the measuring range, the guaranteed metrological properties shall remain
unchanged.
Note 3 to entry: The CDD code of this entry for Electronic Data Exchange is ABC027.
3.1.9
pressure
force per unit area applied in a direction perpendicular to a surface
2
Note 1 to entry: The SI unit for pressure is the Pascal (Pa), equal to one Newton per square metre (N/m or
−1 −2
kg·m ·s ).
Note 2 to entry: In Annex A, a table shows the relationship between the SI unit and other units, often used for
process measurement transmitter applications.
Note 3 to entry: For the purpose of this document, a simplified definition could be accepted as follows: "Ratio of
orthogonal component of the force per unit area to that unit area".
3.1.10
variable scale pressure transmitter
pressure transmitter with an adjustable measuring range (turn-down ratio)
3.2 Terms related the process conditions
3.2.1
diaphragm seal
remote seal
functional component that transfers the pressure to be measured to the PMT by hydraulic
path and decouples the PMT from influence factors stemming from the process
Note 1 to entry: A remote seal is connected to the transmitter by a capillary; the diaphragm seal is usually an
integral part of the transmitter.
Note 2 to entry: The primary purpose of using diaphragm/remote seals is to protect the sensing element against
high process temperatures or aggressive media.
Note 3 to entry: A diaphragm made of suitable material is responsible for the separation of the measured
fluids/gases and transmitter. A fluid adapted to the measurement task is responsible for the transfer of the
pressure to the measuring element.
Note 4 to entry: The diaphragm seal is included in the treatment of the total measurement error (e.g. temperature
influence, step response time, vacuum stability, etc.).
3.2.2
manifold
pipe fitting or similar device, such as a flanged joint, that connects multiple inputs or outputs,
allowing differential pressure PMTs to connect to the process
4 General description of the device and overview
The general description outlined in Clause 4 of IEC 62828-1:2017 is applicable.
For the scope of this document, see a more detailed description of the functional blocks of an
intelligent pressure PMT in Annex B.
5 Reference test conditions
To verify the influence of external quantities on accuracy as well as the mechanical and
electrical conditions which a device can withstand and still work within specification, Clause 5
of IEC 62828-1:2017 applies, both for standard reference test conditions and for operating
reference test conditions.

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6 Test procedures
6.1 General
Clause 6 of IEC 62828-1:2017 shall apply, with the following a
...