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CONVEYOR ROLL- Resistivity/Conductivity Test Further to your order No: 9962, dated 4 October 2000, I have examined and tested two "yelorolls" for selective compliance with the relevant requirements of SABS IEC 60079-0 and EN 50 014:1993 "Electrical apparatus for potentially explosive atmospheres; Part 0: General requirements" incorporating requirements for measuring resistivity and conductivity of materials and wish to comment as follows: The test for surface resistivity and conductivity was done in an accordance with clause 7.3.1 of EN 50 014:1993 "Electrical apparatus for potentially explosive atmospheres-General requirements" and clause 22.4.7 of SABS IEC 60079-0 "Electrical apparatus for gas atmospheres". The insulation resistance was measured and the following results were recorded: i) Sample 1 Average current measured between conductive lines = 0.15µA Applied Voltage Ua = 500V, and R = 500/0,15 x 10-9 = 3.33 GΩ ii) Sample 2 Average current measured between conductive lines = 0.8µA Applied Voltage Ua = 500V, and R = 500/0.8 x 10-9 = 0.625GΩ
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PO Box 7725
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