SIST EN IEC 62828-4:2020

Reference conditions and procedures for testing industrial and process measurement transmitters - Part 4: Specific procedures for level transmitters (IEC 62828-4:2020)

This part of IEC 62828 establishes specific procedures for testing level transmitters used in
measuring and control systems for industrial process and machinery control systems. For
general test procedures, reference is to be made to IEC 62828-1:2017, applicable to all types
of transmitters.
Throughout this document, the term "industrial transmitters" covers all types of transmitters
used in measuring and control systems for industrial processes and for machinery.
The requirements of this document are applicable to all level measurement principles.
Detailed description of transmitters is given for two main principles for improved clarity.

Referenzbedingungen und Testmethoden für Industrie- und Prozessmessgrößenumformer - Teil 4: Spezielle Testmethoden für Füllstandmessumformer (IEC 62828-4:2020)

Conditions de référence et procédures pour l'essai des transmetteurs de mesure industriels et de processus - Partie 4: Procédures spécifiques pour les transmetteurs de niveau (IEC 62828-4:2020)

L'IEC 62828-4:2020 établit les procédures spécifiques d'essai des transmetteurs de niveau utilisés dans les systèmes de mesure et de commande des processus industriels et des systèmes de commande des machines. Pour les procédures d'essais générales, référence doit être faite à l'IEC 62828-1:2017, applicable à tous les types de transmetteurs.
Tout au long du présent document, le terme "transmetteurs industriels" couvre tous les types de transmetteurs utilisés dans les systèmes de mesure et de commande des processus industriels et des machines.
Les exigences du présent document s'appliquent à tous les principes de mesure du niveau.
Par souci de clarté, une description détaillée des transmetteurs est donnée pour deux principes principaux.

Referenčni pogoji in postopki za preskušanje industrijskih in procesnih merilnih oddajnikov - 4. del: Posebni postopki za oddajnike nivoja (IEC 62828-4:2020)

General Information

• Status: Published
• Public Enquiry End Date: 11-Jul-2019
• Publication Date: 09-Nov-2020
• ICS: 25.040.40 - Industrial process measurement and control
• Technical Committee: MOV - Measuring equipment for electromagnetic quantities
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 07-Oct-2020
• Due Date: 12-Dec-2020
• Completion Date: 10-Nov-2020
• Ref Project: EN IEC 62828-4:2020 - Reference conditions and procedures for testing industrial and process measurement transmitters - Part 4: Specific procedures for level transmitters

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN IEC 62828-4:2020
01-december-2020
Referenčni pogoji in postopki za preskušanje industrijskih in procesnih merilnih
oddajnikov - 4. del: Posebni postopki za oddajnike nivoja (IEC 62828-4:2020)
Reference conditions and procedures for testing industrial and process measurement
transmitters - Part 4: Specific procedures for level transmitters (IEC 62828-4:2020)
Referenzbedingungen und Testmethoden für Industrie- und
Prozessmessgrößenumformer - Teil 4: Spezielle Testmethoden für
Füllstandmessumformer (IEC 62828-4:2020)
Conditions de référence et procédures pour l'essai des transmetteurs de mesure
industriels et de processus - Partie 4: Procédures spécifiques pour les transmetteurs de
niveau (IEC 62828-4:2020)
Ta slovenski standard je istoveten z: EN IEC 62828-4:2020
ICS:
25.040.40 Merjenje in krmiljenje Industrial process
industrijskih postopkov measurement and control
SIST EN IEC 62828-4:2020 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN IEC 62828-4:2020

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SIST EN IEC 62828-4:2020


EUROPEAN STANDARD EN IEC 62828-4

NORME EUROPÉENNE

EUROPÄISCHE NORM
September 2020
ICS 17.200.20; 25.040.40

English Version
Reference conditions and procedures for testing industrial and
process measurement transmitters - Part 4: Specific procedures
for level transmitters
(IEC 62828-4:2020)
Conditions de référence et procédures pour l'essai des Referenzbedingungen und Testmethoden für Industrie- und
transmetteurs de mesure industriels et de processus - Prozessmessgrößenumformer - Teil 4: Spezielle
Partie 4: Procédures spécifiques pour les transmetteurs de Testmethoden für Füllstandmessumformer
niveau (IEC 62828-4:2020)
(IEC 62828-4:2020)
This European Standard was approved by CENELEC on 2020-09-22. 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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, 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
© 2020 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
 Ref. No. EN IEC 62828-4:2020 E

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SIST EN IEC 62828-4:2020
EN IEC 62828-4:2020 (E)
European foreword
The text of document 65B/1178(F)/FDIS, future edition 1 of IEC 62828-4, prepared by SC 65B
“Measurement and control devices” of IEC/TC 65 “Industrial-process measurement, control and
automation” was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as
EN IEC 62828-4:2020.
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2021-06-22
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2023-09-22
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 62828-4:2020 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 60529:1989 NOTE Harmonized as EN 60529:1991 (not modified)
IEC 60947-5-6:1999 NOTE Harmonized as EN 60947-5-6:2000 (not modified)
IEC 61140:2016 NOTE Harmonized as EN 61140:2016 (not modified)
IEC 61298-1:2008 NOTE Harmonized as EN 61298-1:2008 (not modified)
IEC 61298-2:2008 NOTE Harmonized as EN 61298-2:2008 (not modified)
IEC 61298-3:2008 NOTE Harmonized as EN 61298-3:2008 (not modified)
IEC 61987-1:2006 NOTE Harmonized as EN 61987-1:2007 (not modified)
IEC 61987-11:2016 NOTE Harmonized as EN 61987-11:2017 (not modified)
IEC 61987-15 NOTE Harmonized as EN 61987-15
IEC 62683-1:2017 NOTE Harmonized as EN 62683-1:2017 (not modified)
2

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SIST EN IEC 62828-4:2020
EN IEC 62828-4:2020 (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 60068-2-6 2007 Environmental testing - Part 2–6: Tests -EN 60068-2-6 2008
Test Fc: Vibration (sinusoidal)
IEC 60068-2-27 2008 Environmental testing - Part 2–27: Tests -EN 60068-2-27 2009
Test Ea and guidance: Shock
IEC 60068-2-64 2008 Environmental testing - Part 2–64: Tests -EN 60068-2-64 2008
Test Fh: Vibration, broadband random
and guidance
IEC 61326-2-3 2012 Electrical equipment for measurement,EN 61326-2-3 2013
control and laboratory use - EMC
requirements - Part 2–3: Particular
requirements - Test configuration,
operational conditions and performance
criteria for transducers with integrated or
remote signal conditioning
IEC 62828-1 2017 Reference conditions and procedures forEN IEC 62828-1 2018
testing industrial and process
measurement transmitters - Part 1:
General procedures for all types of
transmitters
IEC 62828-2 2017 Reference conditions and procedures forEN IEC 62828-2 2018
testing industrial and process
measurement transmitters - Part 2:
Specific procedures for pressure
transmitters


3

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SIST EN IEC 62828-4:2020

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SIST EN IEC 62828-4:2020




IEC 62828-4

®


Edition 1.0 2020-08




INTERNATIONAL



STANDARD




NORME


INTERNATIONALE
colour

inside










Reference conditions and procedures for testing industrial and process

measurement transmitters –

Part 4: Specific procedures for level transmitters



Conditions de reference et procedures pour l'essai des transmetteurs

de mesure industriels et de processus –


Partie 4: Procédures spécifiques pour les transmetteurs de niveau













INTERNATIONAL

ELECTROTECHNICAL

COMMISSION


COMMISSION

ELECTROTECHNIQUE


INTERNATIONALE




ICS 17.200.20; 25.040.40 ISBN 978-2-8322-8757-6




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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SIST EN IEC 62828-4:2020
– 2 – IEC 62828-4:2020 © IEC 2020
CONTENTS
FOREWORD . 5
INTRODUCTION . 7
1 Scope . 8
2 Normative references . 8
3 Terms and definitions . 8
3.1 Basic definitions . 9
3.2 Level transmitter definitions . 11
3.2.2 Pressure-based level transmitter definitions . 11
3.2.4 Float level transmitter definitions . 12
3.2.6 Microwave/Radar level transmitter definitions . 12
3.2.7 Optical based level transmitter definitions . 12
3.2.9 Capacitance and admittance level transmitter definitions . 13
3.2.10 Mechanical level transmitter definitions . 13
3.2.11 Electrical resistance level transmitter definitions . 14
3.3 Measurement parameters . 14
3.4 Influence quantity definitions . 14
3.5 Reference to the IEC common data dictionary (CDD) . 15
4 General description of main types of level transmitters . 16
4.1 General . 16
4.2 Pressure-based level transmitters . 16
4.3 Microwave/radar level transmitter . 18
4.3.1 General . 18
4.3.2 Free-space radar level transmitter . 18
4.3.3 Guided-wave radar level transmitter . 19
5 Reference test conditions . 20
5.1 General . 20
5.2 Standard reference test conditions . 20
5.2.1 General . 20
5.2.2 Environmental test conditions . 20
5.2.3 Power supply conditions . 21
5.2.4 Load conditions . 21
5.2.5 Mounting positions for testing . 21
5.3 Reference test conditions for ambient and process quantities influencing
operation . 21
5.3.1 General . 21
5.3.2 Process conditions . 22
5.3.3 Environmental atmospheric conditions . 22
5.3.4 Mechanical vibration . 23
5.3.5 Shock, drop and topple . 23
5.3.6 Power supply . 23
5.3.7 Electromagnetic compatibility (EMC) . 23
5.4 Reference design criteria . 23
5.4.1 General . 23
5.4.2 Enclosure protection against solid, liquid (IP) and impact (IK) . 23
5.4.3 Enclosure protection against corrosive and erosive influences . 23
5.4.4 Electrical safety (insulation resistance, dielectric strength) . 24
5.4.5 Hazardous environment (for application in explosive atmosphere) . 24

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SIST EN IEC 62828-4:2020
IEC 62828-4:2020 © IEC 2020 – 3 –
5.4.6 Functional safety . 24
6 Test procedures . 24
6.1 General . 24
6.1.1 Overview . 24
6.1.2 Specific test setups and procedures . 25
6.2 Type tests at standard reference conditions . 28
6.2.1 General . 28
6.2.2 Accuracy and related factors . 29
6.2.3 Static behaviour . 30
6.2.4 Dynamic behaviour . 31
6.3 Type tests at operating reference test conditions . 31
6.3.1 General . 31
6.3.2 Ambient temperature effects . 31
6.3.3 Ambient relative humidity effects . 32
6.3.4 Vibration effects . 32
6.3.5 Shock, drop and topple . 32
6.3.6 Accelerated operational life test . 32
6.3.7 EMC tests . 32
6.3.8 Further test procedures . 32
6.3.9 Additional test for digital transmitters . 32
6.4 Routine tests. 32
6.5 Acceptance, integration, periodic and maintenance tests . 32
6.5.1 General . 32
6.5.2 Periodical verification . 32
6.5.3 Periodical calibration . 32
7 Test report and technical documentation . 32
7.1 Test report . 32
7.2 Technical documentation . 33
7.3 Total probable error TPE . 33
7.3.1 General . 33
7.3.2 Specific errors . 33
Annex A (informative) Main characteristics for level transmitters . 34
A.1 Properties of level transmitter classes . 34
A.1.1 General . 34
A.1.2 Pressure-based level transmitter . 34
A.1.3 Microwave/Radar level transmitter . 36
A.2 Product properties . 42
A.2.1 Library of properties used in the device classes . 42
A.2.2 Value lists of properties . 46
Annex B (informative) Example for the calculation of the TPE based on 7.3 and the
MRU and MRE . 48
B.1 Overview of the parameters used for the error calculation . 48
B.2 Example test report pressure-based level transmitter . 48
B.2.1 General . 48
B.2.2 Test protocol . 48
B.2.3 DUT characteristics . 48
B.2.4 TPE calculation . 49
B.2.5 MRU calculation . 50

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SIST EN IEC 62828-4:2020
– 4 – IEC 62828-4:2020 © IEC 2020
B.3 Sub test processes . 51
B.3.1 Inaccuracy test . 51
B.3.2 Ambient temperature effect test . 52
B.3.3 Process temperature effect test . 53
B.3.4 Long-term stability test . 54
Bibliography . 56


Figure 1 – Principle diagram of time values and their meanings . 10
Figure 2 – Principles of pressure-based level transmitters . 18
Figure 3 – Free-space radar level transmitter . 19
Figure 4 – Guided-wave radar level transmitter . 20
Figure 5 – Schematic example of a test set-up for pressure PMT . 25
Figure 6 – Typical test set-up for radar level transmitter . 26
Figure 7 –Test setup simulated targets and simulated environment. 27
Figure 8 – Example of test setup for wet test . 28

Table 1 – Environmental test conditions . 21
Table 2 – Influence quantities for the various level measurement principles . 22
Table 3 – Number of measurement cycles and number and position of test points . 24
Table 4 – Example of statement of maximum error. 29
Table A.1 – Pressure-based level transmitter . 34
Table A.2 – Free-space radar level transmitter . 37
Table A.3 – Guided-wave radar level transmitter . 39
Table A.4 – Library of properties used in the device classes . 42
Table A.5 – Value lists of properties . 47
Table B.1 – Abbreviated terms . 48
Table B.2 – DUT characteristics . 49
Table B.3 – TPE calculation . 49
Table B.4 – MRU calculation . 50
Table B.5 – Reference test devices . 51
Table B.6 – Reference test conditions . 51
Table B.7 – Test results . 52
Table B.8 – Reference test equipment . 52
Table B.9 – Reference test conditions . 53
Table B.10 – Test results . 53
Table B.11 – Reference test equipment . 53
Table B.12 – Reference test conditions . 54
Table B.13 – Test results . 54
Table B.14 – Reference test equipment . 55
Table B.15 – Reference test conditions . 55
Table B.16 – Test results . 55

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SIST EN IEC 62828-4:2020
IEC 62828-4:2020 © IEC 2020 – 5 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________

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

Part 4: Specific procedures for level 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
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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 62828-4 has been prepared by subcommittee 65B: Measurement
and control devices, of IEC technical committee 65: Industrial-process measurement, control
and automation.
The IEC 62828 series cancels and replaces the IEC 60770 series and proposes revisions for
the IEC 61298 series.
The text of this International Standard is based on the following documents:
FDIS Report on voting
65B/1178/FDIS 65B/1182/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.

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SIST EN IEC 62828-4:2020
– 6 – IEC 62828-4:2020 © IEC 2020
This International Standard is to be used in conjunction with IEC 62828-1:2017.
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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SIST EN IEC 62828-4:2020
IEC 62828-4:2020 © IEC 2020 – 7 –
INTRODUCTION
Most of the curren
...

SLOVENSKI STANDARD
oSIST prEN IEC 62828-4:2019
01-julij-2019
Referenčni pogoji in postopki za preskušanje industrijskih in procesnih merilnih
oddajnikov - 4. del: Posebni postopki za nivojske oddajnike
Reference conditions and procedures for testing industrial and process measurement
transmitters - Part 4: Specific procedures for level transmitters
Ta slovenski standard je istoveten z: prEN IEC 62828-4:2019
ICS:
25.040.40 Merjenje in krmiljenje Industrial process
industrijskih postopkov measurement and control
oSIST prEN IEC 62828-4:2019 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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oSIST prEN IEC 62828-4:2019

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oSIST prEN IEC 62828-4:2019
65B/1151/CDV

COMMITTEE DRAFT FOR VOTE (CDV)
PROJECT NUMBER:
IEC 62828-4 ED1
DATE OF CIRCULATION: CLOSING DATE FOR VOTING:
2019-04-26 2019-07-19
SUPERSEDES DOCUMENTS:
65B/1121/CD,65B/1148/CC

IEC SC 65B : MEASUREMENT AND CONTROL DEVICES
SECRETARIAT: SECRETARY:
United States of America Mr Angus Low
OF INTEREST TO THE FOLLOWING COMMITTEES: PROPOSED HORIZONTAL STANDARD:


Other TC/SCs are requested to indicate their interest, if
any, in this CDV to the secretary.
FUNCTIONS CONCERNED:
EMC ENVIRONMENT QUALITY ASSURANCE SAFETY

SUBMITTED FOR CENELEC PARALLEL VOTING NOT SUBMITTED FOR CENELEC PARALLEL VOTING
Attention IEC-CENELEC parallel voting
The attention of IEC National Committees, members of
CENELEC, is drawn to the fact that this Committee Draft
for Vote (CDV) is submitted for parallel voting.
The CENELEC members are invited to vote through the
CENELEC online voting system.

This document is still under study and subject to change. It should not be used for reference purposes.
Recipients of this document are invited to submit, with their comments, notification of any relevant patent rights of
which they are aware and to provide supporting documentation.

TITLE:
Reference conditions and procedures for testing industrial and process measurement
transmitters - Part 4: Specific procedures for level transmitters

PROPOSED STABILITY DATE: 2023

NOTE FROM TC/SC OFFICERS:


Copyright © 2019 International Electrotechnical Commission, IEC. All rights reserved. It is permitted to download this
electronic file, to make a copy and to print out the content for the sole purpose of preparing National Committee positions.
You may not copy or "mirror" the file or printed version of the document, or any part of it, for any other purpose without
permission in writing from IEC.

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oSIST prEN IEC 62828-4:2019
65B/1151/CDV – 2 – IEC 62828-4 CDV  IEC:2019
1
2  CONTENTS
3
4 FOREWORD . 5
5 INTRODUCTION . 7
6 1. Scope . 9
7 2. Normative references . 9
8 3. Terms and definitions . 10
9 3.1 General . 10
10 3.2 Basic definitions . 10
11 3.3 Level transmitter definitions . 12
12 3.4 Measurement parameters . 14
13 3.5 Influence quantity definitions . 14
14 4. General description of the main types of level transmitters . 15
15 4.1 General . 15
16 4.2 Pressure-based level transmitters. 16
17 4.3 Microwave/Radar level transmitter . 17
18 4.3.1 General . 17
19 4.3.2 Free-space radar level transmitter . 18
20 4.3.3 Guided-wave radar level transmitter . 19
21 5. Reference test conditions . 20
22 5.1 General . 20
23 5.2 Standard reference test conditions . 20
24 5.2.1 General . 20
25 5.2.2 Environmental test conditions . 20
26 5.2.3 Power supply conditions . 21
27 5.2.4 Load conditions . 21
28 5.2.5 Mounting positions for testing . 21
29 5.3 Reference test conditions for ambient and process quantities
30 influencing operation . 21
31 5.3.1 General . 21
32 5.3.2 Process conditions . 22
33 5.3.3 Environmental atmospheric conditions . 22
34 5.3.4 Mechanical vibration . 23
35 5.3.5 Shock, drop and topple . 23
36 5.3.6 Power supply . 23
37 5.3.7 Electromagnetic compatibility (EMC) . 23
38 5.4 Reference design criteria . 23
39 5.4.1 General . 23
40 5.4.2 Enclosure protection against solid, liquid (IP) and impact (IK) . 23
41 5.4.3 Enclosure protection against corrosive and erosive
42 influences . 23

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oSIST prEN IEC 62828-4:2019
IEC 62828-4CDV  IEC:2019 – 3 – 65B/1151/CDV
43 5.4.4 Electrical safety (insulation resistance, dielectric strength) . 23
44 5.4.5 Hazardous environment (for application in explosive
45 atmosphere) . 23
46 5.4.6 Functional safety . 23
47 6. Test procedures . 24
48 6.1 General . 24
49 6.1.1 Specific test setups and procedures . 24
50 6.2 Type tests at standard reference conditions . 27
51 6.2.1 General . 27
52 6.2.2 Accuracy and related factors . 28
53 6.2.3 Static behaviour . 29
54 6.2.4 Dynamic behaviour . 29
55 6.3 Type tests at operating reference test conditions . 30
56 6.3.1 General . 30
57 6.3.2 Ambient temperature effects . 30
58 6.3.3 Ambient relative humidity effects . 30
59 6.3.4 Vibration effects . 30
60 6.3.5 Shock, drop and topple . 30
61 6.3.6 Accelerated operational life test . 30
62 6.3.7 EMC tests . 30
63 6.3.8 Further test procedures . 30
64 6.3.9 Additional test for digital transmitters . 30
65 6.4 Routine tests . 30
66 6.5.1 General . 31
67 6.5.2 Periodical verification . 31
68 6.5.3 Periodical calibration . 31
69 7. Test report and technical documentation . 31
70 7.1 Test report . 31
71 7.2 Technical documentation . 31
72 7.3 Total probable error TPE . 31
73 7.3.1 General . 31
74 7.3.2 Specific errors . 31
75 Annex A ¶(informative)¶Main characteristics for level transmitters . 32
76 A.1 Properties of level transmitter classes . 32
77 A.1.1 Pressure-based level transmitter . 32
78 A.1.2 Microwave/Radar level transmitter . 34
79 A.2 Product properties . 40
80 A.2.1 Library of properties used in the device classes . 40
81 A.2.2 Value lists of properties . 45
82 Annex B ¶(Informative)¶Example for the calculation of the TPE based on
83 subclause 7.3 and ¶the MRU and MRE . 47
84 B.1 Overview of the used parameters for the error calculation . 47

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85 B.2 Example test report pressure-based level transmitter . 48
86 B.2.1 Test Protocol . 48
87 B.3 Sub test processes . 50
88 B.3.1 Inaccuracy test . 50
89 B.3.2 Ambient temperature effect test . 51
90 B.3.3 Process temperature effect test . 52
91 B.3.4 Long term stability test . 53
92
93

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94 INTERNATIONAL ELECTROTECHNICAL COMMISSION
95 ____________
96
97 REFERENCE CONDITIONS AND PROCEDURES FOR TESTING INDUSTRIAL
98 AND PROCESS MEASUREMENT TRANSMITTERS–
99 Part 4: Specific procedures for level transmitters
100
101
102
103 FOREWORD
104 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
105 all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
106 international co-operation on all questions concerning standardization in the electrical and electronic fields. To
107 this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
108 Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC
109 Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested
110 in the subject dealt with may participate in this preparatory work. International, governmental and non-
111 governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely
112 with the International Organization for Standardization (ISO) in accordance with conditions determined by
113 agreement between the two organizations.
114 2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
115 consensus of opinion on the relevant subjects since each technical committee has representation from all
116 interested IEC National Committees.
117 3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
118 Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
119 Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
120 misinterpretation by any end user.
121 4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
122 transparently to the maximum extent possible in their national and regional publications. Any divergence
123 between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
124 the latter.
125 5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
126 assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
127 services carried out by independent certification bodies.
128 6) All users should ensure that they have the latest edition of this publication.
129 7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
130 members of its technical committees and IEC National Committees for any personal injury, property damage or
131 other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
132 expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
133 Publications.
134 8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
135 indispensable for the correct application of this publication.
136 9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
137 patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
138 International Standard IEC 62828-4 has been prepared by Subcommittee 65B: Measurement
139 & control devices, of IEC Technical Committee 65: Industrial-process measurement, control
140 and automation.
141 The IEC 62828 series cancels and replaces the IEC 60770 series
142 The text of this standard is based on the following documents:
FDIS Report on voting
XX/XX/FDIS XX/XX/RVD
143
144 Full information on the voting for the approval of this standard can be found in the report on
145 voting indicated in the above table.
146 This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.

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147 The committee has decided that the contents of this publication will remain unchanged until
148 the stability date indicated on the IEC web site under "http://webstore.iec.ch" in the data
149 related to the specific publication. At this date, the publication will be:
150 • reconfirmed,
151 • withdrawn,
152 • replaced by a revised edition, or
153 • amended.
154
155 The National Committees are requested to note that for this publication the stability date
156 is 2022.
157 THIS TEXT IS INCLUDED FOR THE INFORMATION OF THE NATIONAL COMMITTEES AND WILL BE DELETED
158 AT THE PUBLICATION STAGE.
159

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160 INTRODUCTION
161
162 Most of the current IEC standards on industrial measurement transmitters are rather old and
163 were developed having in mind devices based on analog technologies. Today’s digital
164 industrial and process measurement transmitters are quite different from those analog
165 transmitters: they include more functions and newer interfaces, both towards the computing
166 section (mostly digital) and towards the measuring section (mostly mechanical). Even if some
167 standards dealing with digital transmitters already exist, they are not sufficient, since some
168 aspects of the performance are not covered by appropriate test methods.
169 In addition, the existing IEC test standards for industrial and process measurement
170 transmitters are spread over many documents, so that for manufacturers and users it was
171 difficult, impractical and time-consuming to identify and select all the standards to be applied
172 to a device measuring a specific process quantity (pressure, temperature, level, flow, etc.).
173 To help the manufacturers and users, it was decided to review, complete and reorganize the
174 existing IEC standards on the industrial and process measurement transmitters and to create
175 a more suitable, effective and comprehensive standard series that provides, in a systematic
176 way, all the needed specifications and tests for the different industrial and process
177 measurement transmitters.
178 To solve the issues mentioned above and to provide an added value for the stakeholders, the
179 new standard series on industrial and process measurement transmitters covers the following
180 main aspects:
181 • Applicable normative references
182 • Specific terms and definitions
183 • Typical configurations and architectures for the various types of industrial and
184 measurement transmitters
185 • Hardware and software aspects
186 • Interfaces (to the process, to the operator, to the other measurement and control
187 devices)
188 • Physical, mechanical and electrical requirements and relevant tests; clear definition of
189 the test categories: type tests, acceptance tests and routine tests
190 • Performances (their specification, tests and verification)
191 • Environmental protection, hazardous areas application, functional safety, etc.
192 • Structure of the technical documentation.
193 To cover in a systematic way all the topics to be addressed, the standard series is organized
194 in several parts. At the moment of the publication of this document, IEC 62828 consists of the
195 following parts:
196 • Part 1: General procedures for all types of transmitters
197 • Part 2: Specific procedures for pressure transmitters
198 • Part 3: Specific procedures for temperature transmitters
199 • Part 4: Specific procedures for level transmitters
200 • Part 5: Specific procedures for flow transmitters
201
202
203 In preparing the IEC 62828 series (all parts), many test procedures were taken, with the
204 necessary improvements, from the IEC 61298 series (all parts). As the IEC 61298 (all parts) is

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205 currently applicable to all process measurement and control devices, when the IEC 62828 (all
206 parts) is completed, IEC 61298 (all parts) will be revised to harmonize it with IEC 62828 (all
207 parts), taking out from its scope the industrial and process measurement transmitters. During
208 the time when the scope of IEC 61298 (all parts) is being updated, the new IEC 62828 series
209 takes precedence for industrial and process measurement transmitters.
210
211 When the IEC 62828 series is published, the IEC 60770 series will be withdrawn.
212

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213 REFERENCE CONDITIONS AND PROCEDURES FOR TESTING INDUSTRIAL
214 AND PROCESS MEASUREMENT TRANSMITTERS –
215 Part 4: Specific procedures for level transmitters
216
217
218 1. Scope
219 Part 4 of the IEC 62828 standard series establishes specific procedures for testing level
220 transmitters used in measuring and control systems for industrial process and machinery
221 control systems. For general test procedures, reference is to be made to IEC 62828-1:2017 of
222 the standard, applicable to all types of transmitters. Throughout this standard the term
223 “industrial transmitters” covers all types of transmitters used in measuring and control
224 systems for industrial processes and for machinery.
225 The requirements of this standard are applicable to all level measurement principles.
226 Detailed description of transmitters is given for two main principles for improved clarity.
227
228 2. Normative references
229 The following documents, in whole or in part, are normatively referenced in this document and
230 are indispensable for its application. For dated references, only the edition cited applies. For
231 undated references, the latest edition of the referenced document (including any
232 amendments) applies.
233 IEC 62828-1:2017, Reference conditions and procedures for testing industrial and process
234 measurement transmitters - Part 1: General procedures for all types of transmitters
235 The normative references listed in Clause 2 of IEC 62828-1:2017 apply.
236 In addition the following standards, specific for level transmitters, are considered:
237 IEC 60050-300:2006, International Electrotechnical Vocabulary (IEV) – Electrical and
238 electronic measurements and measuring instruments
239 – Part 151: Electrical and magnetic devices
240 – Part 311: Electrical and electronic measurements - General terms relating to measurements
241 – Part 314: Electrical and electronic measurements - Specific terms according to the type of
242 instrument
243 IEC 60068-2-6:2007 Environmental testing - Part 2-6: Tests - Test Fc: Vibration (sinusoidal)
244 IEC 60068-2-27:2008 Environmental testing - Part 2-27: Tests - Test Ea and guidance: Shock
245 IEC 60068-2-64:2008 Environmental testing - Part 2-64: Tests - Test Fh: Vibration, broadband
246 random and guidance
247 IEC 61326-2-3:2012 Electrical equipment for measurement, control and laboratory use - EMC
248 requirements - Part 2-3: Particular requirements - Test configuration, operational conditions
249 and performance criteria for transducers with integrated or remote signal conditioning
250 IEC 61987-11:2012, Industrial-process measurement and control - Data structures and
251 elements in process equipment catalogues - Part 11: List of Properties (LOP) of measuring
252 equipment for electronic data exchange - Generic structures
253 IEC 61987-15:2016, Industrial-process Measurement and Control - Data Structures and
254 Elements in Process Equipment - Part 15: List of Properties (LOP) for Level Measuring
255 Equipment for electronic data exchange
256 IEC 62828-2:2017, Reference conditions and procedures for testing industrial and process
257 measurement transmitters - Part 1: Specific procedures for pressure transmitters

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258 ISO IEC Guide 99:2007 International vocabulary of metrology -- Basic and general concepts
259 and associated terms (VIM)
260 3. Terms and definitions
261 3.1 General
262 The terms, definitions and abbreviations listed in Clause 3 of IEC 62828-1:2017 apply.
263 In addition the following terms and definitions, specific for level transmitters, are considered.
264 3.2 Basic definitions
265 3.2.1
266 warm-up time
267 duration between the instant when the power supply is energized and the instant when the
268 instrument can be used, as specified by the manufacturer
269 [SOURCE: IEC 61987 DB: Identifier IECABB026, see Figure 1]
270 3.2.2
271 settling time
272 time interval between the step change of an input signal and the instant when the resulting
273 variation of the output of the signal does not deviate more than 1% from its final steady state
274 value
275 [SOURCE: IEC 61987 DB: Identifier IECABA999, see Figure1]
276 3.2.3
277 output signal
278 analog or digital representation of the measurand produced by a transducer¶[SOURCE: IEV
279 314-04-06]
280 Note to entry: a transmitter is a transducer with standardized output, see IEV 351-56-29.

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281
282
283 Key
284 t time
285 Figure 1 – Principle diagram of time values and their meanings
286
287 3.2.4
288 true value (of a quantity)
289 value consistent with the definition of a given particular quantity
290 Note 1to entry: this term is used in the "true value" approach.
291 Note 2 to entry: this is a value that would be obtained by a perfect measurement.
292 Note 3 to entry: true values are by nature indeterminate.
293 Note 4 to entry: the indefinite article "a", rather than the definite article "the", is used in conjunction with "true
294 value" because there can be many values consistent with the definition of a given particular quantity
295 [SOURCE: VIM 1.19, IEV 311-01-04]
296 3.2.5
297 conventional true value (of a quantity)
298 value attributed to a particular quantity and accepted, sometimes by convention, as having an
299 uncertainty appropriate for a given purpose
300 Note 1 to entry: this term is used in the "uncertainty" approach.
301 Note 2 to entry: the "conventional true value" is sometimes called "assigned value", "best estimate of the value", "conventional
302 value" or "reference value". The term "reference value", in this sense, should not be confused with "reference
303 value" in the sense used in 311-07-01.
304 Note 3 to entry: frequently, a large number of results of measurement of a quantity are used to establish a conventional true
305 value.

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306 Note 4 to entry: traditional definitions, based on the true value approach, treated the conventional true value as a value
307 approximating to a true value of the quantity such that the difference could be neglected for the purposes for
308 which that value was used.
309 [IEV 311-01-06, VIM 1.20]
310 3.2.6
311 zero point for pressure-based level measurement
312 level at which the medium to be measured is not in contact with the sensing element of the
313 pressure transmitter.
314 Note to entry: for an installed pressure-based level transmitter this means an empty, non-pressurized tank
315
316 3.3 Level transmitter definitions
317 3.3.1
318 level transmitter
319 transmitter that outputs a signal representative of a level
320 [SOURCE:IEC 61987-11: Identifier IECABA803]
321 3.3.2 Pressure-based level transmitter definitions
322
323 3.3.2.1
324 pressure-based level transmitter
325 level transmitter that uses the pressure exerted by a head of liquid to measure level
326 [SOURCE: IEC 61987-11: Identifier IECABA812]
327 Note to entry: pressure-based level transmitters are often called hydrostatic level transmitters
328 3.3.2.2
329 pressure level transmitter (principle 1)
330 pressure (hydrostatic) level transmitter that uses gauge pressure to measure level
331 [SOURCE: IEC 61987-11: Identifier IECABA814]
332 3.3.2.3
333 differential pressure level transmitter (principle 2, 3)
334 pressure (hydrostatic) level transmitter that uses differential pressure to measure level
335 [SOURCE: IEC 61987-11: Identifier IECABA813]
336 3.3.3
337 displacer level transmitter
338 level transmitter that uses the buoyancy of a submerged displacement element to measure
339 level
340 [SOURCE: IEC 61987-11: Identifier IECABA804]
341 3.3.4 Float level transmitter definitions
342 3.3.4.1
343 float level transmitter
344 level transmitter that uses a float or a follower to measure level
345 [SOURCE: IEC 61987-11: Identifier IECABA809]
346 3.3.4.2
347 magnetostrictive level transmitter
348 float level transmitter that uses the magnetostrictive effect to determine the position of the
349 float
350 [SOURCE: IEC 61987-11: Identifier IECABA810]
351 3.3.4.3

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352 magnet level transmitters
353 float level transmitter that uses a magnet and resistors to determine the position of the float.
354 [SOURCE: IEC 61987-11: Identifier IECABA811]
355 3.3.5
356 ultrasonic (or sonic) level transmitter
357 wave level transmitter that uses the tr
...