Estimation of Bias and Variability of Continuous Gas Monitor Data: Application to Carbon Monoxide Monitor Accuracy

Details

• Personal Author:
  Shulman, Stanley A. ; Smith, Jerome P.
• Corporate Authors:
  National Institute for Occupational Safety and Health. Division of Applied Research and Technology
• Description:
  A method is presented for the evaluation of the bias, variability, and accuracy of gas monitors. This method is based on using the parameters for the fitted response curves of the monitors. Thereby, variability between calibrations, between dates within each calibration period, and between different units can be evaluated at several different standard concentrations. By combining variability information with bias information, accuracy can be assessed. An example using carbon monoxide monitor data is provided. Since monitor response can be determined in a chamber simultaneously for several monitors, correlation of errors about the fitted lines is considered. Monitor drift between calibrations is also considered. Procedures for variance components estimation are provided for balanced data. Procedures using Proc Mixed in SAS that provide solutions for both balanced and unbalanced data are available from the authors.
• Subjects:
  Occupational Health Safety
• Keywords:
  Accuracy Data-processing Measurement-equipment Monitoring-systems Monitors OSHA Region 5 Variance Component Estimation
• Series:
  Engineering and Physical Hazards Survey Reports
• Publisher:
  National Institute for Occupational Safety and Health
• Document Type:
  Text
• Genre:
  Field Study
• Place as Subject:
  Ohio ; OSHA Region 5
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Division:
  DART - Division of Applied Research and Technology ; DPSE - Division of Physical Sciences and Engineering ; EPHB - Engineering and Physical Hazards Branch
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  1-58
• Contributor:
  Lipps, Debra A.
• NIOSHTIC Number:
  nn:20021447
• NTIS Accession Number:
  PB2002-104394
• Citation:
  Cincinnati, OH: U.S. Department of Health and Human Services, Public Health Service, Centers for Disease Control and Prevention, National Institute for Occupational Safety and Health, EPHB 005-128, 2001 Jul ; :1-58
• Federal Fiscal Year:
  2001
• Peer Reviewed:
  False
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:4e9f352e5df2649f47831a4e1e7db291b4615f85f3354a048832f72dcfc4d0f0085f845ad39b5ff503968dbc647370c4a82d7df905e7d1575920caa3bac1a2a2
• Download URL:
  https://stacks.cdc.gov/view/cdc/174821/cdc_174821_DS1.pdf
• File Type:
  [PDF - 1.37 MB ]