Radiation Thermometry Review Protocol

Transcription

1 9 th Oct. 009 (Revised 17 th May 010) Thermometry Review Protocol Scope: To provide a method of reviewing CMC s in the subfield of for acceptance in Appendix C of the KCDB. Covers service category numbers 1.1., 1.., of the CLASSIFICATION OF SERVICES IN THERMOMETRY (May 008) in the KCDB. Review guidelines (cf. Table 1): Items sed for Defining ITS90 (Service categories 1.1., 1.., 1.4) IF <Criterion 1: OK> & <Criterion : OK > THEN: Scrutiny at the level determined by Scrutiny Rule 0, 1 or (rule selected according to Table 1) ELSE: RMO WG8 scrutiny Items sed for Disseminating ITS90 (Service category.5) IF <Criterion 1: OK> & <Criterion : OK > THEN: Scrutiny at the level determined by Scrutiny Rule 0 or 3 (rule selected according to Table 1) ELSE: RMO scrutiny. Scrutiny levels classified by Cutoff values (Table X) of Table 1 Scrutiny Rule 0 Accept without scrutiny Scrutiny Rule 1 IF CMC / Table X 1 THEN: Accept without scrutiny IF 1 > CMC / Table X /3 THEN: RMO scrutiny IF /3 > CMC / Table X THEN: RMO scrutiny WG8 scrutiny Scrutiny Rule IF CMC / Table X 3/ THEN: Accept without scrutiny IF 3/ > CMC / Table X 1 THEN: RMO scrutiny IF 1 > CMC / Table X THEN: RMO scrutiny WG8 scrutiny Scrutiny Rule 3 IF CMC / Table X 1 THEN: Accept without scrutiny IF 1 > CMC / Table X THEN: RMO scrutiny (Table X: value in Table X, where X= to 6 as indicated in Table 1 Cutoff values ) 1

2 Table 1 CMC review guidelines *0 Service category Examples of instrument or artifact 1. Items sed for Defining ITS Primary fixed point cells for Complete apparatus realizing fixed points for Stard Thermometers Ag/Au/Cu point blackbody cell. Items sed for Disseminating ITS90 Ag/Au/Cu point blackbody furnace 0.65 m / 0.9 m stard thermometer with direct ITS90, 0.65 m / 0.9 m stard thermometer calibrated by comparison above 96 o C Condition KC of FP available KC * of ITS90 scale only KC of FP available KC * of ITS90 scale only Same wavelength *5 as KC Not same wavelength as KC but same wavelength *5 as SC Criterion 1 Criterion Additional "KC(FP) *1 result OK" result OK" result OK wth NMIKCFP " "KC(FP) *1 result OK" result OK" result OK wth NMI KC FP " 1 Table "Ref. stard *4 Table 1 Table "Ref. stard *4 Table "KC result OK" "KC result OK" "SC result OK" 0 Not same wavelength as KC no SC with "KC result OK" 1 Table 3 same wavelength *5 "Ref. stard *6 Scrutiny rule No. Cutoff values Table 3 SC of FP available "SC(FP) *1 result OK".5.1 Secondary fixedpoint blackbody cells complete instruments Hg/Ga/In/Sn/Zn/Al/Ag point blackbody cell/furnace SC * of ITS90 scale only "SC(Scale) *3 result OK" "SC(Scale) *3 result OK wth NMI SC FP " 3 Table 4 "Ref. stard *6 3 Table 4.5. Variable temperature blackbody sources VTBB calibrated by a stard thermometer, VTBB calibrated by radiance comparison against a stard VTBB "Ref thermometer *7 3 Table 3,5.5.3 Strip lamps Vacuum lamps, gas filled lamps "KC result OK".5.4 thermometers Visual optical pyrometers 3.9 m / 814 m thermometer including thermal imagers calibrated by VTBB against a reference thermometer, 0.9 m / 1.6 m thermometer calibrated by 3fixedpoint / 4 fixedpoint interpolation Same wavelength *5 as SC Not same wavelength *5 as SC No SC Disappearing filament pyrometer "SC result OK" "SC result OK" 3 Table 5 "Ref. stard *8 "Ref. stard *9 3 Table 5 3 Table 6 means no criterion/value applicable/needed result OK means *10 : V NMI, V RV ( k ) ( k ) ( k )

3 NMI ( k ) ( k ) 3 for the temperature indicated in Table 7. result OK with NMI FP means: V NMI, V ( k ) ( k ) ( k ) NMI FP ( k ) ( k ) 3 for the temperature indicated in Table 7. Ref stard / thermometer CMC OK means: Reference stard / thermometer CMC approved for the same temperature > Ref CMC Here, NMI NMI FP Ref CMC V NMI, V RV is the NMI s CMC uncertainty. is the uncertainty of the is the uncertainty of the reference value is the NMI s uncertainty is the uncertainty of the NMI s fixed point in the is the CMC of the reference stard is the NMI s result is the reference value Notes *0: For CMCs not requiring a KC, documented evidence may include comparisons that are not registered in the KCDB. *1: /supplementary comparison of fixed points such as in COOMET TK5. *: /supplementary comparison of a scale realized with reference to the relevant fixed point. *3: /supplementary comparison of temperature scales such as in CCTK5, EROMET K5, APMP TK5 APMP TS. *4: Reference stard in service category 1.1. or 1.. (e.g. of another NMI), to which 3

4 the artifact is traceable. *5: Wavelength range for which the effect of difference in wavelength is small enough that it has no relevance on the CMC. *6: Reference stard in the same service category (e.g. of another NMI), to which the instrument/artifact is traceable. *7: Reference thermometer that is used for calibrating the VTBB under calibration, or reference thermometer that gives the temperature of the stard VTBB. *8: Reference thermometer that gives the reference temperature of the blackbody, or secondary fixedpoint blackbodies. *9: Reference strip lamp/ thermometer, to which the instrument is traceable. *10: Criteria for evaluating comparison results follow those of the former Thermometry CMC Review Protocol Scrutiny items required for RMO WG8 scrutiny Detailed analysis of calibration method uncertainty analysis according to WG5 uncertainty documents [1, ], Other supporting evidence, such as Peer Review report or International Comparison results. Reference [1] J.Fischer, M.Battuello, M.Sadli, M.Ballico, S.N.Park, P.Saunders, Yuan Z., B.C.Johnson, E.van der Ham, Wang L., F.Sakuma, G.Machin, N.Fox, S.gur, M.Matveyev CCTWG5 on, ncertainty budgets for of scales by, CCT/0303 Summary in Temperature, Its Measurement Control in Science Industry, vol.7, D.C.Ripple ed., Melville, New York, pp (003) [] J.Fischer, P.Saunders, M.Sadli, M.Battuello, C.W.Park, Yuan Z., H.Yoon, Wang L., E.van der Ham, F.Sakuma, Y.Yamada, M.Ballico, G.Machin, N.Fox, J.Hollt, M.Matveyev, P.Bloembergen, S.gur, CCTWG5 on, ncertainty budgets for calibration of thermometers below the silver point, Ver. 1.71, CCTWG5/docs03 (008) Summary in Int. J. Thermophys., vol. 9, pp (008) [3] Kostkowski & Lee, Theory Methods of Optical, in Temperature, Its Measurement Control in Science Industry, vol. 3, pp (196) 4

5 Appendix 1: Cutoff values Table Service Categories 1.1./1.. Table 3 Service Categories 1.4/.5. Fixed point (k=) / mk T / K t / o C (k=) / K Ag, Au, Cu The threshold value is the normal uncertainty for the Cu point calibration in [1] Table 4 Service Category Fixed point (k=) / mk Hg Ga In Sn Zn Al Ag The threshold value is the arithmetic mean of the combined normal best uncertainties* A1 for the fixedpoint calibration in [] The threshold value is the maximum of the arithmetic mean of the combined normal best uncertainties for the three schemes in [1]. Note *A1: Normal is evaluated for the wavelength that gives the largest uncertainty among the possible choices of wavelength at that temperature, best for the one that gives the smallest. For instance, for the Ag point, normal is evaluated with 3.9 m, while best is evaluated with 0.9 m. 5

6 Table 5 Service Categories.5./.5.4 (k=) / mk t / o C 0.9 m 1.6 m 3.9 m 81 m The threshold value is the maximum value of the arithmetic mean of the combined normal best uncertainties for the VTBB FPBB scheme at that temperature []. Table 6 Service Category.5.4 t / o C (k=) / K The threshold values are from [3]. 6

7 Appendix : CMC service categories supporting KCs SCs Table 7 Field Comparison name CCTK5 APMP T K5 Thermometry EROMET COOMET T K5 T K5 EROMET T S1 APMP T S Supplemetary Comparisons on KCDB appendix B (as of May 010) Range, years Comparison type, Field Realizations of the ITS90 between 961 C 1700 C Comparison of of the ITS90 using over the range 96 C 800 C Realizations of the ITS90 up to 1700 C Realizations of the ITS90 between 961 C 1084 C Freezing points of Silver, Gold, Copper Examination of base parameters for ITS90 scale realisation in Supplementary Calibration of thermometer Supplementary Temperature: 400 C to 000 C Status Service category Supporting temperature range 1. Items sed for Defining ITS Primary fixed point cells for Complete apparatus realizing fixed points for T CMC = T or T (n ) < T CMC < T (n +1) T CMC = T or T (n ) < T CMC < T (n +1) Approved for equivalence, Results available Approved for equivalence, Results available In progress Proposed Approved published Approved published 1.4 Stard Thermometers T,min 60 K < T CMC < T,max + 60 K. Items sed for Disseminating ITS Secondary fixedpoint blackbody cells complete instruments T CMC = T or T (n ) < T CMC < T (n +1).5. Variable temperature blackbody sources T,min 60 K < T CMC < T,max + 60 K.5.3 Strip lamps T,min 60 K < T CMC < T max + 60 K.5.4 thermometers T,min 60 K < T CMC < T,max + 60 K visual optical pyrometers T,min 60 K < T CMC < T max + 60 K : Approved : Fully supports CMC : On going : Partially supports CMC 7