Review of CMC Template Yoshiya Terao (NMIJ Fluid Flow Div.) WGFF Workshop, June 2012 Abridged for APMP/TCFF meeting, Nov. 2012
Example of CMC table A B C D E F G H I J K L M N R Current CMC table (Sample) Measurement Conditions/Independent Variable Expanded Uncertainty 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 #1 #2 #3 #4 Class Mass water Volume water Mass hydrocarbon Volume hydrocarbon Calibration or Measurement Service Instrument or Artifact Instrument Type or Method Minimum Maximum Units Parameter Specifications Value Units Covera ge Factor Level of Confide nce Water meter Coriolis 13.9 833 kg/s Fluid water 0.060 % 2 95% Yes Water meter Positive displacement, turbine, differential pressure, ultrasonic, vortex meter, electromagnetic 100 kpa to 250 kpa Is the expande d uncertai nty a 50.0 3000 m 3 /h Fluid water 0.060 % 2 95% Yes Oil meter Coriolis 0.67 67 kg/s Fluid Oil meter Measurand Level or Range Positive displacement, turbine, ultrasonic 3 300 m 3 /h Fluid 100 kpa to 250 kpa hydrocarbon (light oil, kerosene) 0.020 % 2 95% Yes 100 kpa to 700 kpa 10 t, 1 t hydrocarbon (light oil, kerosene) 0.030 % 2 95% Yes 100 kpa to 700 kpa 10 t, 1 t same for mass and volume both numbers have been rounded during calcuration Comments
New proposal Use the smaller uncertainty (mass or volume) as the expanded uncertainty. The larger uncertainty and corresponding flow range should be included in the comments section. The classification needs to be changed accordingly.
Modified according to the new proposal A B C D E F G H I J K L M N R New proposal Measurement Conditions/Independent Variable Expanded Uncertainty 2 3 4 Calibration or Measurement Service Class Water Instrument or Artifact Water meter Instrument Type or Method Coriolis, Positive displacement, turbine, differential pressure, ultrasonic, vortex meter, electromagnetic Measurand Level or Range Minimum Maximum Units Parameter Specifications Value Units Is the Level of expande Coverag Confide d e Factor nce uncertai nty a Comments 50.0 3000 m 3 /h Fluid water 0.060 % 2 95% Yes 5 6 7 8 #1 100 kpa to 250 kpa Information about mass flow rate Mass flow rate: 13.9 to 833 mkg/s 3 /h with same uncertainty 9 10 11 12 13 14 #3 Hydrocar bon Oil meter Coriolis, Positive displacement, turbine, ultrasonic 0.7 67 kg/s Fluid hydrocarbon (light oil, kerosene) 0.020 % 2 95% Yes 100 kpa to 700 kpa 10 t, 1 t Smaller uncertainty Larger uncertainty and corresponding flow range Volume flow rate: 3 to 300 m 3 /h with expanded uncertainty of 0.030 %
Other issues "Instrument Type or Method : The reference flow standard of the calibration service should be written here. Unit: "dm 3 " should be replaces by "L Change Heat flow to Hot water flow or Enthalpy flow?
Example with " Instrument Type or Method " description A B C D E F G H I J K L M N R New proposal Measurement Conditions/Independent Variable Expanded Uncertainty 2 3 4 Class Calibration or Measurement Service Instrument or Artifact Instrument Type or Method 50t weighing Water Water meter tank with flying start and stop Measurand Level or Range Minimum Maximum Units Parameter Specifications Value Units Is the Level of expande Coverag Confide d e Factor nce uncertai nty a Comments 50.0 3000 m 3 /h Fluid water 0.060 % 2 95% Yes 5 6 7 8 #1 the reference flow standard of the calibration service 100 kpa to 250 kpa Information about mass flow rate Mass flow rate: 13.9 to 833 m 3 /h with same uncertainty 9 10 11 12 13 #3 Hydrocar bon Oil meter 10t weighing tank with flying start and stop 0.7 67 kg/s Fluid hydrocarbon (light oil, kerosene) 0.020 % 2 95% Yes 100 kpa to 700 kpa 10 t, 1 t Smaller uncertainty Larger uncertainty and corresponding flow range Volume flow rate: 3 to 300 m 3 /h with expanded uncertainty of 0.030 %