ISO 284:2012
Conveyor belts - Electrical conductivity - Specification and test method

Standard No.

ISO 284:2012

Release Date

2012

Published By

International Organization for Standardization (ISO)

Latest

ISO 284:2012

Scope

This International Standard specifies the maximum electrical resistance of a conveyor belt and the corresponding test method. The test is intended to ensure that the belt is sufficiently conductive to avoid the accumulation of electrical static charge which can be developed during service use. This International Standard is not suitable or applicable to light conveyor belts as described in ISO 21183-1[1], the static electrical properties of which are measured by ISO 21178[2]. The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. 3 Specification The electrical resistance of the conveyor belt when tested in accordance with the method described in Clause 4 shall not exceed 3 × 108 Ω (300 MΩ). Lower values may be specified for special applications. 4 Test method 4.1 Principle An electric current of specified voltage is passed via electrodes through a suitably prepared test piece taken from the belt. 4.2 Materials and apparatus 4.2.1 Sheet of insulating material, a little larger than the test piece. 4.2.2 Two cylindrical and coaxial brass electrodes, the base of one being circular and the other annular. The dimensions and masses are given in Figure 1. The bases of these electrodes shall be machined flat and polished. A flexible insulated wire shall be connected to each electrode. 4.2.3 Ohmmeter (resistance-measuring instrument), with a range up to 1010 Ω and accurate to ±5 %. 4.2.4 Source of direct current, adjustable to 1000 V, and not permitting a current greater than 10 mA or causing an energy dissipation of more than 1 W in the test piece. The source of current may be either an accumulator or a rectified, stabilized AC-power supply. 1 Licensee=University of Alberta/5966844001, User=sharabiani, shahramfs

ISO 284:2012 history

• 2012 ISO 284:2012 Conveyor belts - Electrical conductivity - Specification and test method
• 2003 ISO 284:2003 Conveyor belts - Electrical conductivity - Specification and test method
• 1982 ISO 284:1982 Conveyor belts; Electrical conductivity; Specification and method of test
• 1975 ISO 284:1975 Title missing - Legacy paper document