SIST EN ISO 21178:2020
(Main)Light conveyor belts - Determination of electrical resistances (ISO 21178:2020)
Light conveyor belts - Determination of electrical resistances (ISO 21178:2020)
This document specifies test methods for determining the electrical resistances of light conveyor belts according to ISO 21183‑1. The resistances are surface resistance, volume resistance perpendicular to the belt plane, and longitudinal and transverse volume resistance parallel to the belt plane. This document also specifies two test methods for determining the surface resistivity and the volume resistivity.
Leichte Fördergurte - Bestimmung der elektrischen Widerstände (ISO 21178:2020)
Dieses Dokument legt Prüfverfahren zur Bestimmung der elektrischen Widerstände leichter Fördergurte nach ISO 21183 1 fest. Die Widerstände sind der Oberflächenwiderstand, der Durchgangswiderstand senkrecht zur Gurtoberfläche und der Durchgangswiderstand in Längs- und Querrichtung parallel zur Gurtoberfläche. Dieses Dokument legt auch zwei Prüfverfahren zur Bestimmung des spezifischen Oberflächenwiderstands und des spezifischen Durchgangswiderstands fest.
Courroies transporteuses légères - Détermination des résistances électriques (ISO 21178:2020)
Le présent document spécifie des méthodes d'essai pour la détermination des résistances électriques des courroies transporteuses légères selon l'ISO 21183-1. Les résistances sont la résistance surfacique, la résistance volumique perpendiculaire au plan de la courroie et la résistance volumique transversale et longitudinale parallèle au plan de la courroie. Le présent document spécifie également deux méthodes d'essai pour déterminer la résistivité surfacique et la résistivité volumique.
Naprave za kontinuirni transport - Lahki trakovi tračnih transporterjev - Ugotavljanje električnih upornosti (ISO 21178:2020)
General Information
Relations
Overview
EN ISO 21178:2020 - Light conveyor belts: Determination of electrical resistances specifies standardized test methods for measuring the electrical behaviour of light conveyor belts. Adopted by CEN and identical to ISO 21178:2020, this European standard defines how to determine surface resistance, volume resistance (perpendicular to the belt plane), and longitudinal and transverse volume resistance (parallel to the belt plane). It also includes methods to determine surface resistivity and volume resistivity. EN ISO 21178:2020 supersedes EN ISO 21178:2013 and is intended for laboratories, manufacturers and conformity assessment bodies working with conveyor belt components.
Key Topics and Requirements
- Scope and definitions: Terms and symbols related to electrical resistance of light conveyor belts are defined to ensure consistent testing and reporting.
- Surface resistance test methods:
- Method A - omni-directional measurement of surface resistance.
- Method B - directional measurement (longitudinal and transverse).
- Each method covers apparatus, test-piece preparation, test procedure, result expression and test reporting.
- Surface resistivity: A separate test procedure for expressing resistance as surface resistivity (ρs), including specimen preparation and measurement technique.
- Volume resistance tests:
- Perpendicular volume resistance (RD) - measurement across the belt thickness.
- Parallel volume resistance (longitudinal/transverse, RDi) - measurement along the belt plane.
- Procedures detail apparatus, specimen geometry, conditioning, measurement and reporting.
- Test documentation: The standard requires clear expression of results and standardized test reports for reproducibility and traceability.
- Normative references and conformance: The standard references ISO 21183‑1 and follows ISO/CEN collaboration procedures.
Practical Applications
- Quality control and product development: Manufacturers use the standard to verify electrical properties of light conveyor belts during material selection and production.
- Electrostatic discharge (ESD) management: Test data support ESD control strategies in industries where static can damage products or create ignition risks (e.g., electronics handling, packaging, powder handling).
- Safety and compliance: Test results help demonstrate conformity with customer specifications and workplace safety requirements.
- Material comparison: Enables objective comparison of alternative belt compounds and constructions based on electrical resistance and resistivity.
Who Should Use This Standard
- Conveyor belt and component manufacturers
- Independent testing laboratories and certification bodies
- Design and reliability engineers (materials, safety, ESD)
- Procurement and quality assurance teams in logistics, food, electronics, and light manufacturing sectors
Related Standards
- ISO 21178:2020 (identical international text)
- ISO 21183‑1 (referenced for light conveyor belt context)
- EN ISO 21178:2013 (superseded edition)
Keywords: EN ISO 21178:2020, light conveyor belts, electrical resistance, surface resistance, volume resistance, surface resistivity, volume resistivity, test methods, conveyor belt testing.
Standards Content (Sample)
SLOVENSKI STANDARD
01-julij-2020
Nadomešča:
SIST EN ISO 21178:2013
Naprave za kontinuirni transport - Lahki trakovi tračnih transporterjev -
Ugotavljanje električnih upornosti (ISO 21178:2020)
Light conveyor belts - Determination of electrical resistances (ISO 21178:2020)
Leichte Fördergurte - Bestimmung der elektrischen Widerstände (ISO 21178:2020)
Courroies transporteuses légères - Détermination des résistances électriques (ISO
21178:2020)
Ta slovenski standard je istoveten z: EN ISO 21178:2020
ICS:
53.040.20 Deli za transporterje Components for conveyors
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EN ISO 21178
EUROPEAN STANDARD
NORME EUROPÉENNE
February 2020
EUROPÄISCHE NORM
ICS 53.040.10 Supersedes EN ISO 21178:2013
English Version
Light conveyor belts - Determination of electrical
resistances (ISO 21178:2020)
Courroies transporteuses légères - Détermination des Leichte Fördergurte - Bestimmung der elektrischen
résistances électriques (ISO 21178:2020) Widerstände (ISO 21178:2020)
This European Standard was approved by CEN on 18 January 2020.
CEN 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 CEN
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 CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2020 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 21178:2020 E
worldwide for CEN national Members.
Contents Page
European foreword . 3
European foreword
This document (EN ISO 21178:2020) has been prepared by Technical Committee ISO/TC 41 "Pulleys
and belts (including veebelts)" in collaboration with Technical Committee CEN/TC 188 “Conveyor belts”
the secretariat of which is held by SNV.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by August 2020, and conflicting national standards shall
be withdrawn at the latest by August 2020.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN ISO 21178:2013.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland,
Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the
United Kingdom.
Endorsement notice
The text of ISO 21178:2020 has been approved by CEN as EN ISO 21178:2020 without any modification.
INTERNATIONAL ISO
STANDARD 21178
Third edition
2020-02
Light conveyor belts — Determination
of electrical resistances
Courroies transporteuses légères — Détermination des résistances
électriques
Reference number
ISO 21178:2020(E)
©
ISO 2020
ISO 21178:2020(E)
© ISO 2020
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting
on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address
below or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Fax: +41 22 749 09 47
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2020 – All rights reserved
ISO 21178:2020(E)
Contents Page
Foreword .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Symbols . 2
5 Electrical surface resistances . 2
5.1 Method A: Measurement of surface resistance, R , omni-directionally . 2
OA
5.1.1 Applicability . 2
5.1.2 Principle . 2
5.1.3 Apparatus (see Figure 1) . 2
5.1.4 Test piece . 4
5.1.5 Procedure . 5
5.1.6 Expression of results . 6
5.1.7 Test report . 6
5.2 Method B: Measurement of surface resistance R in longitudinal and transverse
OB
directions . 6
5.2.1 Applicability . 6
5.2.2 Principle . 6
5.2.3 Apparatus (see Figure 4) . 6
5.2.4 Test piece . 8
5.2.5 Procedure . 9
5.2.6 Expression of results . 9
5.2.7 Test report . 9
6 Electrical surface resistivity ρ .10
s
6.1 General .10
6.2 Principle .10
6.3 Apparatus .11
6.4 Test piece .12
6.4.1 Material .12
6.4.2 Dimensions .12
6.4.3 Number .12
6.4.4 Cleaning .12
6.4.5 Conditioning .12
6.4.6 Preparation .12
6.5 Procedure .12
6.6 Expression of results .13
6.7 Test report .13
7 Electrical volume resistances .13
7.1 Volume resistance, R , perpendicular to plane of belt.13
D
7.1.1 Principle .13
7.1.2 Apparatus .13
7.1.3 Test piece .14
7.1.4 Procedure .15
7.1.5 Expression of results .15
7.1.6 Test report .15
7.2 Volume resistance, R , in longitudinal and transverse directions parallel to plane
Di
of belt .16
7.2.1 Principle .16
7.2.2 Apparatus .16
7.2.3 Test piece .17
7.2.4 Procedure .18
7.2.5 Expression of results .19
ISO 21178:2020(E)
7.2.6 Test report .19
8 Electrical volume resistivity, ρ .19
D
8.1 Procedure .19
8.2 Expression of results .19
8.3 Test report .20
Bibliography .21
iv © ISO 2020 – All rights reserved
ISO 21178:2020(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www .iso .org/ patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to
the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see
www .iso .org/ iso/ foreword .html.
This document was prepared by Technical Committee ISO/TC 41, Pulleys and belts (including veebelts),
Subcommittee SC 3, Conveyor belts, in collaboration with the European Committee for Standardization
(CEN) Technical Committee CEN/TC 188, Conveyor belts, in accordance with the Agreement on technical
cooperation between ISO and CEN (Vienna Agreement).
This third edition cancels and replaces the second edition (ISO 21178:2013), which has been technically
revised. The main changes compared to the previous edition are as follows:
— addition of terms and definitions;
— modifications to the figures and formulas;
— technical changes to the Clauses 5, 6 and 7;
— deletion of Annex A;
— editorial modifications.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www .iso .org/ members .html.
INTERNATIONAL STANDARD ISO 21178:2020(E)
Light conveyor belts — Determination of electrical
resistances
1 Scope
This document specifies test methods for determining the electrical resistances of light conveyor belts
according to ISO 21183-1. The resistances are surface resistance, volume resistance perpendicular
to the belt plane, and longitudinal and transverse volume resistance parallel to the belt plane. This
document also specifies two test methods for determining the surface resistivity and the volume
resistivity.
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.
ISO 18573, Conveyor belts — Test atmospheres and conditioning periods
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at http:// www .electropedia .org/
3.1
electrical surface resistance
quotient of a direct-current voltage applied between two electrodes on the same surface of a test piece
and the current between the electrodes
Note 1 to entry: It is expressed in ohms (Ω).
3.2
electrical surface resistivity
measured surface resistance calculated to apply to a square
Note 1 to entry: It is expressed in ohms (Ω) and the size of the square is immaterial.
3.3
electrical volume resistance
quotient of a direct-current voltage applied between two electrodes in contact with opposite faces of a
test piece and the current between the electrodes, excluding current along the surface
Note 1 to entry: It is expressed in ohms (Ω).
3.4
electrical volume resistivity
measured volume resistance calculated to apply to a cube of unit side
Note 1 to entry: It is expressed in ohm metres (Ωm).
SIST EN ISO 21178:202
...
SLOVENSKI STANDARD
01-julij-2020
Nadomešča:
SIST EN ISO 21178:2013
Naprave za kontinuirni transport - Lahki trakovi tračnih transporterjev -
Ugotavljanje električnih upornosti (ISO 21178:2020)
Light conveyor belts - Determination of electrical resistances (ISO 21178:2020)
Leichte Fördergurte - Bestimmung der elektrischen Widerstände (ISO 21178:2020)
Courroies transporteuses légères - Détermination des résistances électriques (ISO
21178:2020)
Ta slovenski standard je istoveten z: EN ISO 21178:2020
ICS:
53.040.20 Deli za transporterje Components for conveyors
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EN ISO 21178
EUROPEAN STANDARD
NORME EUROPÉENNE
February 2020
EUROPÄISCHE NORM
ICS 53.040.10 Supersedes EN ISO 21178:2013
English Version
Light conveyor belts - Determination of electrical
resistances (ISO 21178:2020)
Courroies transporteuses légères - Détermination des Leichte Fördergurte - Bestimmung der elektrischen
résistances électriques (ISO 21178:2020) Widerstände (ISO 21178:2020)
This European Standard was approved by CEN on 18 January 2020.
CEN 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 CEN
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 CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2020 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 21178:2020 E
worldwide for CEN national Members.
Contents Page
European foreword . 3
European foreword
This document (EN ISO 21178:2020) has been prepared by Technical Committee ISO/TC 41 "Pulleys
and belts (including veebelts)" in collaboration with Technical Committee CEN/TC 188 “Conveyor belts”
the secretariat of which is held by SNV.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by August 2020, and conflicting national standards shall
be withdrawn at the latest by August 2020.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN ISO 21178:2013.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland,
Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the
United Kingdom.
Endorsement notice
The text of ISO 21178:2020 has been approved by CEN as EN ISO 21178:2020 without any modification.
INTERNATIONAL ISO
STANDARD 21178
Third edition
2020-02
Light conveyor belts — Determination
of electrical resistances
Courroies transporteuses légères — Détermination des résistances
électriques
Reference number
ISO 21178:2020(E)
©
ISO 2020
ISO 21178:2020(E)
© ISO 2020
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting
on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address
below or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Fax: +41 22 749 09 47
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2020 – All rights reserved
ISO 21178:2020(E)
Contents Page
Foreword .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Symbols . 2
5 Electrical surface resistances . 2
5.1 Method A: Measurement of surface resistance, R , omni-directionally . 2
OA
5.1.1 Applicability . 2
5.1.2 Principle . 2
5.1.3 Apparatus (see Figure 1) . 2
5.1.4 Test piece . 4
5.1.5 Procedure . 5
5.1.6 Expression of results . 6
5.1.7 Test report . 6
5.2 Method B: Measurement of surface resistance R in longitudinal and transverse
OB
directions . 6
5.2.1 Applicability . 6
5.2.2 Principle . 6
5.2.3 Apparatus (see Figure 4) . 6
5.2.4 Test piece . 8
5.2.5 Procedure . 9
5.2.6 Expression of results . 9
5.2.7 Test report . 9
6 Electrical surface resistivity ρ .10
s
6.1 General .10
6.2 Principle .10
6.3 Apparatus .11
6.4 Test piece .12
6.4.1 Material .12
6.4.2 Dimensions .12
6.4.3 Number .12
6.4.4 Cleaning .12
6.4.5 Conditioning .12
6.4.6 Preparation .12
6.5 Procedure .12
6.6 Expression of results .13
6.7 Test report .13
7 Electrical volume resistances .13
7.1 Volume resistance, R , perpendicular to plane of belt.13
D
7.1.1 Principle .13
7.1.2 Apparatus .13
7.1.3 Test piece .14
7.1.4 Procedure .15
7.1.5 Expression of results .15
7.1.6 Test report .15
7.2 Volume resistance, R , in longitudinal and transverse directions parallel to plane
Di
of belt .16
7.2.1 Principle .16
7.2.2 Apparatus .16
7.2.3 Test piece .17
7.2.4 Procedure .18
7.2.5 Expression of results .19
ISO 21178:2020(E)
7.2.6 Test report .19
8 Electrical volume resistivity, ρ .19
D
8.1 Procedure .19
8.2 Expression of results .19
8.3 Test report .20
Bibliography .21
iv © ISO 2020 – All rights reserved
ISO 21178:2020(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www .iso .org/ patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to
the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see
www .iso .org/ iso/ foreword .html.
This document was prepared by Technical Committee ISO/TC 41, Pulleys and belts (including veebelts),
Subcommittee SC 3, Conveyor belts, in collaboration with the European Committee for Standardization
(CEN) Technical Committee CEN/TC 188, Conveyor belts, in accordance with the Agreement on technical
cooperation between ISO and CEN (Vienna Agreement).
This third edition cancels and replaces the second edition (ISO 21178:2013), which has been technically
revised. The main changes compared to the previous edition are as follows:
— addition of terms and definitions;
— modifications to the figures and formulas;
— technical changes to the Clauses 5, 6 and 7;
— deletion of Annex A;
— editorial modifications.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www .iso .org/ members .html.
INTERNATIONAL STANDARD ISO 21178:2020(E)
Light conveyor belts — Determination of electrical
resistances
1 Scope
This document specifies test methods for determining the electrical resistances of light conveyor belts
according to ISO 21183-1. The resistances are surface resistance, volume resistance perpendicular
to the belt plane, and longitudinal and transverse volume resistance parallel to the belt plane. This
document also specifies two test methods for determining the surface resistivity and the volume
resistivity.
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.
ISO 18573, Conveyor belts — Test atmospheres and conditioning periods
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at http:// www .electropedia .org/
3.1
electrical surface resistance
quotient of a direct-current voltage applied between two electrodes on the same surface of a test piece
and the current between the electrodes
Note 1 to entry: It is expressed in ohms (Ω).
3.2
electrical surface resistivity
measured surface resistance calculated to apply to a square
Note 1 to entry: It is expressed in ohms (Ω) and the size of the square is immaterial.
3.3
electrical volume resistance
quotient of a direct-current voltage applied between two electrodes in contact with opposite faces of a
test piece and the current between the electrodes, excluding current along the surface
Note 1 to entry: It is expressed in ohms (Ω).
3.4
electrical volume resistivity
measured volume resistance calculated to apply to a cube of unit side
Note 1 to entry: It is expressed in ohm metres (Ωm).
SIST EN ISO 21178:202
...
Frequently Asked Questions
SIST EN ISO 21178:2020 is a standard published by the Slovenian Institute for Standardization (SIST). Its full title is "Light conveyor belts - Determination of electrical resistances (ISO 21178:2020)". This standard covers: This document specifies test methods for determining the electrical resistances of light conveyor belts according to ISO 21183‑1. The resistances are surface resistance, volume resistance perpendicular to the belt plane, and longitudinal and transverse volume resistance parallel to the belt plane. This document also specifies two test methods for determining the surface resistivity and the volume resistivity.
This document specifies test methods for determining the electrical resistances of light conveyor belts according to ISO 21183‑1. The resistances are surface resistance, volume resistance perpendicular to the belt plane, and longitudinal and transverse volume resistance parallel to the belt plane. This document also specifies two test methods for determining the surface resistivity and the volume resistivity.
SIST EN ISO 21178:2020 is classified under the following ICS (International Classification for Standards) categories: 53.040.20 - Components for conveyors. The ICS classification helps identify the subject area and facilitates finding related standards.
SIST EN ISO 21178:2020 has the following relationships with other standards: It is inter standard links to SIST EN ISO 21178:2013. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
You can purchase SIST EN ISO 21178:2020 directly from iTeh Standards. The document is available in PDF format and is delivered instantly after payment. Add the standard to your cart and complete the secure checkout process. iTeh Standards is an authorized distributor of SIST standards.
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