Welcome to CDC stacks | Loss of start-up oxygen in CSE SR-100 self-contained self-rescuers - 11813 | Stephen B. Thacker CDC Library collection
Stacks Logo
Advanced Search
Select up to three search categories and corresponding keywords using the fields to the right. Refer to the Help section for more detailed instructions.
Clear All Simple Search
Advanced Search
Loss of start-up oxygen in CSE SR-100 self-contained self-rescuers
  • Published Date:
    April 2012
Filetype[PDF-1.95 MB]

  • Corporate Authors:
    National Personal Protective Technology Laboratory ; National Institute for Occupational Safety and Health ; United States, Mine Safety and Health Administration.
  • Description:
    "This report describes a National Institute for Occupational Safety and Health (NIOSH) and Mine Safety and Health Administration (MSHA) investigation assessing the prevalence of a lack of sufficient start-up oxygen in CSE SR-100 self-contained self-rescuer (SCSR) devices. The availability of sufficient start-up oxygen is critical to the performance of the SR-100. As part of a routine field testing program of SCSRs used in coal mines, NIOSH and MSHA detected two SR-100s that lacked sufficient start-up oxygen. CSE Corporation subsequently discovered one SCSR that lacked sufficient start-up oxygen in that company's internal quality control program and voluntarily stopped further production and sales of SR-100s. NIOSH developed a protocol to test for the presence of start-up oxygen in field-deployed SR100s. The purpose of the test was to determine if the failure rate of the start-up oxygen in the population of 70,000 field-deployed units exceeded 1%. NIOSH and MSHA used American Society for Quality (ASQ), Sampling Procedures and Tables for Inspection of Isolated Lots by Attributes (ASQC Q3-1988). In assessing the SR-100s, if no more than 3 failures of start-up oxygen occurred in the 500-unit random sample, the SR-100 could be accepted as meeting the Limiting Quality (LQ) rate of 1.25% for start-up oxygen performance. NIOSH tested five hundred field-deployed devices collected from coal mines throughout the United States. NIOSH observed 5 start-up oxygen failures in the 500 units it tested. The maximum number of failures allowed under the LQ rate of 1.25% was exceeded; therefore, the 1% maximum allowable failure rate under the protocol was not met." - NIOSHTIC-2

  • Supporting Files:
    No Additional Files
No Related Documents.
You May Also Like: