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Publication date

July 2013

Number of pages

28 p.

Reference

NF EN ISO 21178

ICS Codes

53.040.10 Conveyors

Classification index

T47-155

Print number

1 - 24/06/2013

International kinship

ISO 21178:2013

European kinship

EN ISO 21178:2013

Sumary

Light conveyor belts - Determination of the electrical resistances

ISO 21178:2013 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. ISO 21178:2013 also specifies two test methods for determining the surface resistivity and the volume resistivity.

Replaced standards (1)

NF EN ISO 21178

January 2007

Standard Cancelled

Light conveyor belts - Determination of electrical resistances

<p>ISO 21178:2005 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. ISO 21178:2005 also specifies two test methods for determining the surface resistivity and the volume resistivity.</p>

Standard replaced by (1)

NF EN ISO 21178

February 2020

Standard Current

Light conveyor belts - Determination of electrical resistances

<p>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.</p>

Table of contents

View the extract

Avant-propos
iv
1 Domaine d'application
1
2 Références normatives
1
3 Symboles
1
4 Résistances électriques surfaciques
2
4.1 Méthode A: mesurage de la résistance surfacique ROA dans toutes les directions
2
4.2 Méthode B: mesurage de la résistance surfacique ROB dans les sens transversal et longitudinal
5
5 Résistivité électrique surfacique
7
5.1 Généralités
7
5.2 Principe
7
5.3 Appareillage
7
5.4 Préparation et conservation des éprouvettes avant l'essai
9
5.5 Mode opératoire
9
5.6 Expression des résultats
9
5.7 Rapport d'essai
10
6 Résistances électriques volumiques
10
6.1 Résistance volumique, RD, perpendiculaire au plan de la courroie
10
6.2 Résistance volumique, RDi, dans les sens longitudinal et transversal parallèlement au plan de la courroie
15
7 Résistivité électrique volumique
18
7.1 Détermination
18
7.2 Expression des résultats
18
7.3 Rapport d'essai
18
Annexe A (informative) Valeurs comparatives pour résistances électriques
19
BIbliographie
20

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