Traceability and Quality Control in a Radiation Thermometry Laboratory Frank Liebmann – Tom Kolat...
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Transcript of Traceability and Quality Control in a Radiation Thermometry Laboratory Frank Liebmann – Tom Kolat...
![Page 1: Traceability and Quality Control in a Radiation Thermometry Laboratory Frank Liebmann – Tom Kolat NCSLi 2011.](https://reader036.fdocuments.us/reader036/viewer/2022062515/56649ca65503460f94967ae4/html5/thumbnails/1.jpg)
Traceability and Quality Control in a Radiation Thermometry
Laboratory
Frank Liebmann – Tom Kolat
NCSLi 2011
![Page 2: Traceability and Quality Control in a Radiation Thermometry Laboratory Frank Liebmann – Tom Kolat NCSLi 2011.](https://reader036.fdocuments.us/reader036/viewer/2022062515/56649ca65503460f94967ae4/html5/thumbnails/2.jpg)
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
© 2011 Fluke Calibration NCSL - Liebmann – RT QC
![Page 3: Traceability and Quality Control in a Radiation Thermometry Laboratory Frank Liebmann – Tom Kolat NCSLi 2011.](https://reader036.fdocuments.us/reader036/viewer/2022062515/56649ca65503460f94967ae4/html5/thumbnails/3.jpg)
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
© 2011 Fluke Calibration NCSL - Liebmann – RT QC
![Page 4: Traceability and Quality Control in a Radiation Thermometry Laboratory Frank Liebmann – Tom Kolat NCSLi 2011.](https://reader036.fdocuments.us/reader036/viewer/2022062515/56649ca65503460f94967ae4/html5/thumbnails/4.jpg)
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
© 2011 Fluke Calibration NCSL - Liebmann – RT QC
![Page 5: Traceability and Quality Control in a Radiation Thermometry Laboratory Frank Liebmann – Tom Kolat NCSLi 2011.](https://reader036.fdocuments.us/reader036/viewer/2022062515/56649ca65503460f94967ae4/html5/thumbnails/5.jpg)
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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
© 2011 Fluke Calibration NCSL - Liebmann – RT QC
![Page 6: Traceability and Quality Control in a Radiation Thermometry Laboratory Frank Liebmann – Tom Kolat NCSLi 2011.](https://reader036.fdocuments.us/reader036/viewer/2022062515/56649ca65503460f94967ae4/html5/thumbnails/6.jpg)
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
© 2011 Fluke Calibration NCSL - Liebmann – RT QC
![Page 7: Traceability and Quality Control in a Radiation Thermometry Laboratory Frank Liebmann – Tom Kolat NCSLi 2011.](https://reader036.fdocuments.us/reader036/viewer/2022062515/56649ca65503460f94967ae4/html5/thumbnails/7.jpg)
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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
© 2011 Fluke Calibration NCSL - Liebmann – RT QC
![Page 8: Traceability and Quality Control in a Radiation Thermometry Laboratory Frank Liebmann – Tom Kolat NCSLi 2011.](https://reader036.fdocuments.us/reader036/viewer/2022062515/56649ca65503460f94967ae4/html5/thumbnails/8.jpg)
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Traceability
© 2011 Fluke Calibration NCSL - Liebmann – RT QC
![Page 9: Traceability and Quality Control in a Radiation Thermometry Laboratory Frank Liebmann – Tom Kolat NCSLi 2011.](https://reader036.fdocuments.us/reader036/viewer/2022062515/56649ca65503460f94967ae4/html5/thumbnails/9.jpg)
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Traceability
© 2011 Fluke Calibration NCSL - Liebmann – RT QC
![Page 10: Traceability and Quality Control in a Radiation Thermometry Laboratory Frank Liebmann – Tom Kolat NCSLi 2011.](https://reader036.fdocuments.us/reader036/viewer/2022062515/56649ca65503460f94967ae4/html5/thumbnails/10.jpg)
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Traceability Scheme
© 2011 Fluke Calibration NCSL - Liebmann – RT QC
![Page 11: Traceability and Quality Control in a Radiation Thermometry Laboratory Frank Liebmann – Tom Kolat NCSLi 2011.](https://reader036.fdocuments.us/reader036/viewer/2022062515/56649ca65503460f94967ae4/html5/thumbnails/11.jpg)
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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
© 2011 Fluke Calibration NCSL - Liebmann – RT QC
![Page 12: Traceability and Quality Control in a Radiation Thermometry Laboratory Frank Liebmann – Tom Kolat NCSLi 2011.](https://reader036.fdocuments.us/reader036/viewer/2022062515/56649ca65503460f94967ae4/html5/thumbnails/12.jpg)
12
Uncertainty Budget
© 2011 Fluke Calibration NCSL - Liebmann – RT QC
KT19 Uncertainties
Provisional
Uncertainties Denot. Type -15 0 50 100 200 350 500
Blackbody
Calibration temperature U1 A 0.013 0.010 0.013 0.013 0.013 0.019 0.029
Blackbody emissivity, isothermal U4 B 0.100 0.100 0.100 0.100 0.100 0.143 0.205
Blackbody emissivity, non-isothermal U5 B 0.002 0.001 0.002 0.006 0.014 0.030 0.046
Reflected ambient radiation U6 B 0.052 0.044 0.028 0.021 0.015 0.011 0.010
Cavity bottom heat exchange U7 B 0.001 0.001 0.001 0.002 0.009 0.029 0.071
Convection U8 A 0.006 0.004 0.004 0.012 0.027 0.050 0.073
Cavity bottom uniformity U9 A 0.042 0.022 0.013 0.016 0.018 0.020 0.033
Ambient conditions U10 B 0.020 0.018 0.014 0.006 0.006 0.010 0.010
Radiation Thermometer
Size-of-source effect U11 B 0.025 0.018 0.009 0.005 0.002 0.002 0.002
Non-linearity U12 B 0.020 0.022 0.030 0.040 0.061 0.099 0.141
Reference temperature U13 B 0.006 0.005 0.002 0.002 0.007 0.017 0.026
Ambient temperature U14 A 0.044 0.038 0.015 0.015 0.054 0.123 0.192
Atmospheric absorption U15 B 0.010 0.011 0.015 0.020 0.031 0.049 0.071
Gain ratios U16 B 0.001 0.001 0.002 0.002 0.003 0.005 0.007
Noise U17 A 0.005 0.004 0.003 0.002 0.002 0.003 0.004
Combined standard uncertainty uc k=1 0.068 0.062 0.057 0.058 0.070 0.115 0.173
Combined expanded uncertainty (k=2) U k=2 0.135 0.124 0.113 0.115 0.139 0.231 0.345
Uncertainty (°C)
![Page 13: Traceability and Quality Control in a Radiation Thermometry Laboratory Frank Liebmann – Tom Kolat NCSLi 2011.](https://reader036.fdocuments.us/reader036/viewer/2022062515/56649ca65503460f94967ae4/html5/thumbnails/13.jpg)
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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
© 2011 Fluke Calibration NCSL - Liebmann – RT QC
![Page 14: Traceability and Quality Control in a Radiation Thermometry Laboratory Frank Liebmann – Tom Kolat NCSLi 2011.](https://reader036.fdocuments.us/reader036/viewer/2022062515/56649ca65503460f94967ae4/html5/thumbnails/14.jpg)
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Quality Control - Blackbody Sources
• Cross check with a national laboratory• Determination of cavity bottom uniformity• Use of a hot-gas purge
© 2011 Fluke Calibration NCSL - Liebmann – RT QC
![Page 15: Traceability and Quality Control in a Radiation Thermometry Laboratory Frank Liebmann – Tom Kolat NCSLi 2011.](https://reader036.fdocuments.us/reader036/viewer/2022062515/56649ca65503460f94967ae4/html5/thumbnails/15.jpg)
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Cross-Checks – Verification
BlackbodyNominal
Temperature(°C)
Temperature Difference
(K)
NISTUncertainty
(K)
AMFUncertainty
(K)
NormalEquivalence
LT -15 0.074 0.34 0.128 0.20LT 0 0.014 0.3 0.133 0.04LT 50 -0.051 0.12 0.170 -0.25LT 100 -0.125 0.11 0.218 -0.51MT 100 -0.058 0.11 0.218 -0.24MT 200 -0.155 0.12 0.335 -0.44HT 200 -0.114 0.12 0.335 -0.32HT 300 -0.144 0.13 0.226 -0.55HT 350 -0.222 0.13 0.260 -0.76HT 420 -0.253 0.14 0.317 -0.73HT 500 -0.320 0.16 0.392 -0.76
© 2011 Fluke Calibration NCSL - Liebmann – RT QC
![Page 16: Traceability and Quality Control in a Radiation Thermometry Laboratory Frank Liebmann – Tom Kolat NCSLi 2011.](https://reader036.fdocuments.us/reader036/viewer/2022062515/56649ca65503460f94967ae4/html5/thumbnails/16.jpg)
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Cavity Uniformity
© 2011 Fluke Calibration NCSL - Liebmann – RT QC
![Page 17: Traceability and Quality Control in a Radiation Thermometry Laboratory Frank Liebmann – Tom Kolat NCSLi 2011.](https://reader036.fdocuments.us/reader036/viewer/2022062515/56649ca65503460f94967ae4/html5/thumbnails/17.jpg)
17
Hot Gas Purge
© 2011 Fluke Calibration NCSL - Liebmann – RT QC
![Page 18: Traceability and Quality Control in a Radiation Thermometry Laboratory Frank Liebmann – Tom Kolat NCSLi 2011.](https://reader036.fdocuments.us/reader036/viewer/2022062515/56649ca65503460f94967ae4/html5/thumbnails/18.jpg)
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
© 2011 Fluke Calibration NCSL - Liebmann – RT QC
![Page 19: Traceability and Quality Control in a Radiation Thermometry Laboratory Frank Liebmann – Tom Kolat NCSLi 2011.](https://reader036.fdocuments.us/reader036/viewer/2022062515/56649ca65503460f94967ae4/html5/thumbnails/19.jpg)
19
Quality Control – Transfer Standard
• Size-of-Source Effect• Alignment• Long Term Stability History• Transfer Standard Warm-up Time
© 2011 Fluke Calibration NCSL - Liebmann – RT QC
![Page 20: Traceability and Quality Control in a Radiation Thermometry Laboratory Frank Liebmann – Tom Kolat NCSLi 2011.](https://reader036.fdocuments.us/reader036/viewer/2022062515/56649ca65503460f94967ae4/html5/thumbnails/20.jpg)
20
Size-of-Source Effect
• 35 mm diameter aperture used• Diameter based on testing
© 2011 Fluke Calibration NCSL - Liebmann – RT QC
![Page 21: Traceability and Quality Control in a Radiation Thermometry Laboratory Frank Liebmann – Tom Kolat NCSLi 2011.](https://reader036.fdocuments.us/reader036/viewer/2022062515/56649ca65503460f94967ae4/html5/thumbnails/21.jpg)
21
Alignment
• Three steps– Angular alignment (laser, aligns tripod head)– Z-axis alignment– X-Y alignment
© 2011 Fluke Calibration NCSL - Liebmann – RT QC
![Page 22: Traceability and Quality Control in a Radiation Thermometry Laboratory Frank Liebmann – Tom Kolat NCSLi 2011.](https://reader036.fdocuments.us/reader036/viewer/2022062515/56649ca65503460f94967ae4/html5/thumbnails/22.jpg)
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Long Term Stability History
© 2011 Fluke Calibration NCSL - Liebmann – RT QC
![Page 23: Traceability and Quality Control in a Radiation Thermometry Laboratory Frank Liebmann – Tom Kolat NCSLi 2011.](https://reader036.fdocuments.us/reader036/viewer/2022062515/56649ca65503460f94967ae4/html5/thumbnails/23.jpg)
23
Transfer Standard Warm-up Time
• Time constant ~ 15 minutes
© 2011 Fluke Calibration NCSL - Liebmann – RT QC
![Page 24: Traceability and Quality Control in a Radiation Thermometry Laboratory Frank Liebmann – Tom Kolat NCSLi 2011.](https://reader036.fdocuments.us/reader036/viewer/2022062515/56649ca65503460f94967ae4/html5/thumbnails/24.jpg)
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
© 2011 Fluke Calibration NCSL - Liebmann – RT QC
![Page 25: Traceability and Quality Control in a Radiation Thermometry Laboratory Frank Liebmann – Tom Kolat NCSLi 2011.](https://reader036.fdocuments.us/reader036/viewer/2022062515/56649ca65503460f94967ae4/html5/thumbnails/25.jpg)
25
Quality Control – Flat Plate
• Models 4180 and 4181• Reflected radiation ~ room temperature• Scatter temperature controlled• Calibration points below ambient
© 2011 Fluke Calibration NCSL - Liebmann – RT QC
![Page 26: Traceability and Quality Control in a Radiation Thermometry Laboratory Frank Liebmann – Tom Kolat NCSLi 2011.](https://reader036.fdocuments.us/reader036/viewer/2022062515/56649ca65503460f94967ae4/html5/thumbnails/26.jpg)
26
Calibrations below Ambient
© 2011 Fluke Calibration NCSL - Liebmann – RT QC
![Page 27: Traceability and Quality Control in a Radiation Thermometry Laboratory Frank Liebmann – Tom Kolat NCSLi 2011.](https://reader036.fdocuments.us/reader036/viewer/2022062515/56649ca65503460f94967ae4/html5/thumbnails/27.jpg)
27
Calibration Geometry
© 2011 Fluke Calibration NCSL - Liebmann – RT QC
![Page 28: Traceability and Quality Control in a Radiation Thermometry Laboratory Frank Liebmann – Tom Kolat NCSLi 2011.](https://reader036.fdocuments.us/reader036/viewer/2022062515/56649ca65503460f94967ae4/html5/thumbnails/28.jpg)
28
Particulates (Dust)
© 2011 Fluke Calibration NCSL - Liebmann – RT QC
![Page 29: Traceability and Quality Control in a Radiation Thermometry Laboratory Frank Liebmann – Tom Kolat NCSLi 2011.](https://reader036.fdocuments.us/reader036/viewer/2022062515/56649ca65503460f94967ae4/html5/thumbnails/29.jpg)
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
© 2011 Fluke Calibration NCSL - Liebmann – RT QC
![Page 30: Traceability and Quality Control in a Radiation Thermometry Laboratory Frank Liebmann – Tom Kolat NCSLi 2011.](https://reader036.fdocuments.us/reader036/viewer/2022062515/56649ca65503460f94967ae4/html5/thumbnails/30.jpg)
30
Conclusion
• Establishment of quality in radiation thermometry calibration• Blackbody cavities• Transfer standards• Flat-Plate calibrations
© 2011 Fluke Calibration NCSL - Liebmann – RT QC