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Ignition Tests With A Fiber-Optic Powered Instrument

Public Domain
File Language:
English


Details

  • Personal Author:
  • Corporate Authors:
    National Institute for Occupational Safety and Health. Spokane Research Laboratory
  • Description:
    New types of industrial instruments use fiber-coupled law energy to power remote serum. Fiber-optic based instruments are useful in classified (hazardous) locations found in many industrial plants because the fiber provides a natural barrier against accidental electrical discharge into potentially explosive atmospheres. However, current safety standards do not cover the use of laser-powered fiber-optic instruments in potentially explosive environments such as found in coal mines. The U. S. Bureau of Mines began an investigation of laser-powered fiber-optic instruments in explosive atmospheres in support of the standards-making process. A commercial fiber-optic interface system, modified to sin relate several worst-case operating conditions, ignited explosive hydrogen-air mixtures. Worst-am simulations consisted of disabling a safety shutoff feature, operating the laser at significantly higher powers than intended for normal operations, and cleaving fiber-optic connections to direct laser energy onto selected absorptive materials. At the highest power level available, the fiber-optic interface system did not ignite selected methane-air mixtures. The obtained data should prove useful in establishing appropriate safety standards.
  • Subjects:
  • Source:
    Proceedings of the 41st Annual ISA Analysis Div. Symposium, 1996, Framingham, Massachusetts, 29 :175-184
  • Document Type:
    Text
  • Genre:
    Conference Publications
  • CIO:
    National Institute for Occupational Safety and Health (NIOSH)
  • NIOSHTIC Number:
    nn:20023919
  • Collection(s):
  • Main Document Checksum:
    urn:sha-512:cce84470df359bc4756c394b29a8500f7af9dfda3e1f108073f87d3bbdb11ccbd56767b62aba757d35b277d86b6dbaa547f229d085fbe0c269ef7a9efe0c60d9
  • Download URL:
  • File Type:
    Filetype[PDF - 465.41 KB ]
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