1 / 0

Traceability and Quality Control in a Radiation Thermometry Laboratory

Traceability and Quality Control in a Radiation Thermometry Laboratory. Frank Liebmann – Tom Kolat NCSLi 2011. Outline. Traceability and Quality Control in a Radiation Thermometry Laboratory Introduction Traceability Traceability Scheme Uncertainty Budgets

mahdis
Download Presentation

Traceability and Quality Control in a Radiation Thermometry Laboratory

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Traceability and Quality Control in a Radiation Thermometry Laboratory

    Frank Liebmann – Tom Kolat NCSLi 2011
  2. Outline Traceability and Quality Control in a Radiation Thermometry Laboratory Introduction Traceability Traceability Scheme Uncertainty Budgets Quality Control - Blackbody Sources Cross-Checks – Verification Cavity Uniformity Hot Gas Purge Quality Control – Transfer Standard Calibrations Size-of-Source Effect Alignment Long Term Stability History Transfer Standard Warm-up Time Quality Control – Flat-Plate Calibrations Calibrations below Ambient Calibration Quality Control Steps Conclusion NCSL - Liebmann – RT QC
  3. Outline Traceability and Quality Control in a Radiation Thermometry Laboratory Introduction Traceability Traceability Scheme Uncertainty Budgets Quality Control - Blackbody Sources Cross-Checks – Verification Cavity Uniformity Hot Gas Purge Quality Control – Transfer Standard Calibrations Size-of-Source Effect Alignment Long Term Stability History Transfer Standard Warm-up Time Quality Control – Flat-Plate Calibrations Calibrations below Ambient Calibration Quality Control Steps Conclusion NCSL - Liebmann – RT QC
  4. Introduction Fluke Calibration in American Fork, Utah (formerly known as Hart Scientific) 2005: Work began to establish a radiometric calibration program Flat-plate radiation sources (IR calibrators) Transfer standard calibration Blackbody Cavities Steps taken for quality control NCSL - Liebmann – RT QC
  5. Learning Objectives Steps taken to assure quality in any calibration program especially one involving radiation thermometry Foster ideas on how to apply these ideas to a calibration laboratory NCSL - Liebmann – RT QC
  6. Outline Traceability and Quality Control in a Radiation Thermometry Laboratory Introduction Traceability Traceability Scheme Uncertainty Budgets Quality Control - Blackbody Sources Cross-Checks – Verification Cavity Uniformity Hot Gas Purge Quality Control Measures – Transfer Standard Calibrations Size-of-Source Effect Alignment Long Term Stability History Transfer Standard Warm-up Time Quality Control Measures – Flat-Plate Calibrations Calibrations below Ambient Calibration Quality Control Steps Conclusion NCSL - Liebmann – RT QC
  7. Traceability Flat-plate sources calibrated radiometrically RT transfer standard: KT19II.82 KT19 calibrated in liquid bath blackbodies Blackbody ε > 0.999 Modeled in STEEP3 Blackbody Z-axis temperature uniformity profiled NCSL - Liebmann – RT QC
  8. Traceability NCSL - Liebmann – RT QC
  9. Traceability NCSL - Liebmann – RT QC
  10. Traceability Scheme NCSL - Liebmann – RT QC
  11. Uncertainty Budget 4 Uncertainty Budgets 4180, 4181 Calibrations (2 flat-plate models) KT19 (Radiometric transfer standard) TRT (cross check with NMI) Original UCB followed traditional contact UCB 2008: BIPM CCT-WG5 Uncertainty Budgets for Calibration of Radiation Thermometers below the Silver Point NCSL - Liebmann – RT QC
  12. Uncertainty Budget NCSL - Liebmann – RT QC
  13. Outline Traceability and Quality Control in a Radiation Thermometry Laboratory Introduction Traceability Traceability Scheme Uncertainty Budgets Quality Control - Blackbody Sources Cross-Checks – Verification Cavity Uniformity Hot Gas Purge Quality Control – Transfer Standard Calibrations Size-of-Source Effect Alignment Long Term Stability History Transfer Standard Warm-up Time Quality Control – Flat-Plate Calibrations Calibrations below Ambient Calibration Quality Control Steps Conclusion NCSL - Liebmann – RT QC
  14. Quality Control - Blackbody Sources Cross check with a national laboratory Determination of cavity bottom uniformity Use of a hot-gas purge NCSL - Liebmann – RT QC
  15. Cross-Checks – Verification NCSL - Liebmann – RT QC
  16. Cavity Uniformity NCSL - Liebmann – RT QC
  17. Hot Gas Purge NCSL - Liebmann – RT QC
  18. Outline Traceability and Quality Control in a Radiation Thermometry Laboratory Introduction Traceability Traceability Scheme Uncertainty Budgets Quality Control - Blackbody Sources Cross-Checks – Verification Cavity Uniformity Hot Gas Purge Quality Control – Transfer Standard Calibrations Size-of-Source Effect Alignment Long Term Stability History Transfer Standard Warm-up Time Quality Control – Flat-Plate Calibrations Calibrations below Ambient Calibration Quality Control Steps Conclusion NCSL - Liebmann – RT QC
  19. Quality Control – Transfer Standard Size-of-Source Effect Alignment Long Term Stability History Transfer Standard Warm-up Time NCSL - Liebmann – RT QC
  20. Size-of-Source Effect 35 mm diameter aperture used Diameter based on testing NCSL - Liebmann – RT QC
  21. Alignment Three steps Angular alignment (laser, aligns tripod head) Z-axis alignment X-Y alignment NCSL - Liebmann – RT QC
  22. Long Term Stability History NCSL - Liebmann – RT QC
  23. Transfer Standard Warm-up Time Time constant ~ 15 minutes NCSL - Liebmann – RT QC
  24. Outline Traceability and Quality Control in a Radiation Thermometry Laboratory Introduction Traceability Traceability Scheme Uncertainty Budgets Quality Control - Blackbody Sources Cross-Checks – Verification Cavity Uniformity Hot Gas Purge Quality Control – Transfer Standard Calibrations Size-of-Source Effect Alignment Long Term Stability History Transfer Standard Warm-up Time Quality Control – Flat-Plate Calibrations Calibrations below Ambient Calibration Quality Control Steps Conclusion NCSL - Liebmann – RT QC
  25. Quality Control – Flat Plate Models 4180 and 4181 Reflected radiation ~ room temperature Scatter temperature controlled Calibration points below ambient NCSL - Liebmann – RT QC
  26. Calibrations below Ambient NCSL - Liebmann – RT QC
  27. Calibration Geometry NCSL - Liebmann – RT QC
  28. Particulates (Dust) NCSL - Liebmann – RT QC
  29. Outline Traceability and Quality Control in a Radiation Thermometry Laboratory Introduction Traceability Traceability Scheme Uncertainty Budgets Quality Control - Blackbody Sources Cross-Checks – Verification Cavity Uniformity Hot Gas Purge Quality Control – Transfer Standard Calibrations Size-of-Source Effect Alignment Long Term Stability History Transfer Standard Warm-up Time Quality Control – Flat-Plate Calibrations Calibrations below Ambient Calibration Quality Control Steps Conclusion NCSL - Liebmann – RT QC
  30. Conclusion Establishment of quality in radiation thermometry calibration Blackbody cavities Transfer standards Flat-Plate calibrations NCSL - Liebmann – RT QC
More Related