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  • SMT, 1994-1998. Fifth call for proposals supporting document. Topic 19: Development and testing of test-apparatus for apparatus to be used in potentially explosive atmospheres and operating with electrical currents greater than 2 Amperes


More detailed and more technical background information is given relating to this topic of the fifth call for proposals under the specific programme for standards, measurements and testing (SMT), 1994-1998. The testing of apparatus with currents greater than 2 Amperes under normal operating conditions is up to now not prescribed sufficiently. Especially the possibility to use extra-low voltage batteries (i.e. lower than 15 Volts) in category 1 equipment should be investigated.The project should cover the following:

- To establish a list of equipment with currents greater than 2 Amperes and to list the essential characteristics to be verified;
- To study the existing measuring methods and to evaluate the consequences of the higher current use;
- To elaborate a suitable testing method in the light of the possibility to use extra-low voltage batteries as energy sources during testing;
- To establish a resulting test method and to guarantee calibration and reproducibility.

A time scale and expected result format are also described.

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