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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

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Traceability and Quality Control in a Radiation Thermometry Laboratory

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  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
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