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In the CMCs uncertainty statements, the notation Q[a, b] stands for the root-sum-square of the terms between brackets: Q[a, b] = [a 2 + b 2]1/2
Unless otherwise stated the expanded uncertainties given below correspond to k = 2 (at a 95 % level of confidence)
Chinese Taipei, CMS (ITRI Center for Measurement Standards)
Matrix or material Analyte or component Dissemination range of measurement capability Range of certified values in reference materials
Amount-of-substance fraction in mmol/mol Relative expanded uncertainty in % Amount-of-substance fraction in mmol/mol Relative expanded uncertainty in %
nitrogen carbon dioxide 0.5 to 160 1 to 0.2 0.5 to 160 0.5 to 1.6E2
  • Mechanism for measurement service delivery : CMS-CRM/Calibration service
  • Approved on 08 July 2020
  • Institute service identifier : CRM-C003
Matrix or material Analyte or component Dissemination range of measurement capability Range of certified values in reference materials
Amount-of-substance fraction in mmol/mol Relative expanded uncertainty in % Amount-of-substance fraction in mmol/mol Relative expanded uncertainty in %
nitrogen carbon monoxide 1 to 100 1 to 0.5 1 to 100 1 to 1.0E2
  • Mechanism for measurement service delivery : CMS-CRM/Calibration service
  • Approved on 08 July 2020
  • Institute service identifier : CRM-C001
Matrix or material Analyte or component Dissemination range of measurement capability Range of certified values in reference materials
Amount-of-substance fraction in mmol/mol Relative expanded uncertainty in % Amount-of-substance fraction in mmol/mol Relative expanded uncertainty in %
air methane 1 to 20 0.8 to 0.3 1 to 20 1 to 2.0E1
  • Mechanism for measurement service delivery : CMS-CRM/Calibration service
  • Approved on 08 July 2020
  • Institute service identifier : CRM-C015
Matrix or material Analyte or component Dissemination range of measurement capability Range of certified values in reference materials
Amount-of-substance fraction in mmol/mol Relative expanded uncertainty in % Amount-of-substance fraction in mmol/mol Relative expanded uncertainty in %
nitrogen methane 1 to 500 0.8 to 0.2 1 to 500 1 to 5.0E2
  • Mechanism for measurement service delivery : CMS-CRM/Calibration service
  • Approved on 08 July 2020
  • Institute service identifier : CRM-C006
Matrix or material Analyte or component Dissemination range of measurement capability Range of certified values in reference materials
Amount-of-substance fraction in mmol/mol Relative expanded uncertainty in % Amount-of-substance fraction in mmol/mol Relative expanded uncertainty in %
nitrogen methane 0.5 to 1 1 to 0.8 0.5 to 1 0.5 to 1
  • Mechanism for measurement service delivery : CMS-CRM/Calibration service
  • Approved on 08 July 2020
  • Institute service identifier : CRM-C005
Matrix or material Analyte or component Dissemination range of measurement capability Range of certified values in reference materials
Amount-of-substance fraction in mol/mol Relative expanded uncertainty in % Amount-of-substance fraction in mol/mol Relative expanded uncertainty in %
nitrogen oxygen 0.05 to 0.3 1 to 0.1 0.05 to 0.3 5.0E-2 to 0.3
  • Mechanism for measurement service delivery : CMS-CRM/Calibration service
  • Approved on 08 July 2020
  • Institute service identifier : CRM-C014
Matrix or material Analyte or component Dissemination range of measurement capability Range of certified values in reference materials
Amount-of-substance fraction in mmol/mol Relative expanded uncertainty in % Amount-of-substance fraction in mmol/mol Relative expanded uncertainty in %
nitrogen propane 1 to 50 1 to 0.5 1 to 50 1 to 5.0E1
  • Mechanism for measurement service delivery : CMS-CRM/Calibration service
  • Approved on 08 July 2020
  • Institute service identifier : CRM-C007
Sound calibrators , Sound pressure level : 90 dB (reference: 20 µPa) to 120 dB (reference: 20 µPa)
Multi frequency sound calibrator
Absolute expanded uncertainty : 0.1 dB
Sound pressure level by insert-voltage
Frequency : 31.5 Hz
Microphone type : LS2P
Approved on 12 January 2012
Institute service identifier : CMS/A-03
Measurement microphones , Pressure sensitivity level
Measurement microphone type: IEC 61094-1 LS2, IEC 61094-4 WS2
Absolute expanded uncertainty : 8.0E-2 dB
IEC 61094-5:2001
Frequency : 50 Hz to 8 kHz
Approved on 12 January 2012
Institute service identifier : CMS/A-02
Measurement microphones , Pressure sensitivity level
Measurement microphone type: IEC 61094-1 LS and IEC 61094-4 WS
Absolute expanded uncertainty : 8.0E-2 dB
IEC 61094-5:2001
Frequency : 250 Hz
Approved on 12 January 2012
Institute service identifier : CMS/A-02
Measurement microphones , Pressure sensitivity level
Measurement microphone type: IEC 61094-1 LS2P
Absolute expanded uncertainty : 8.0E-2 dB
IEC 61094-2:2009
Frequency : 20 Hz to 25 Hz
Approved on 12 January 2012
Institute service identifier : CMS/A-01
Sound measuring instruments , Sound pressure response level
Sound level meter
Absolute expanded uncertainty : 0.2 dB
Calibrated sound calibrator
Frequency : 63 Hz to 500 Hz
Approved on 12 January 2012
Institute service identifier : CMS/A-03
Sound measuring instruments , Sound pressure response level
Sound level meter
Absolute expanded uncertainty : 0.3 dB
Calibrated sound calibrator
Frequency : 31.5 Hz
Approved on 12 January 2012
Institute service identifier : CMS/A-03
Items for defining ITS-90 , Temperature : 231.928 °C
SPRT
Absolute expanded uncertainty : 1.1 mK
Tin freezing point cell
Furnace : 3-zone

Modified on 09 February 2015
Approved on 28 June 2007
Items for disseminating ITS-90 and PLTS 2000 , Temperature : -70 °C to -60 °C
IPRT
Absolute expanded uncertainty : 9 mK
Comparison in stirred alcohol bath
Interpolation value.
DUT- uncertainty component of hysteresis to be added.
Approved on 27 February 2018
Institute service identifier : CMS/T04
Items for disseminating ITS-90 and PLTS 2000 , Temperature : 80 °C to 100 °C
IPRT
Absolute expanded uncertainty : 1.1E1 mK
Comparison in stirred oil bath
Interpolation value.
DUT- uncertainty component of hysteresis to be added.
Approved on 27 February 2018
Institute service identifier : CMS/T04
Items for disseminating ITS-90 and PLTS 2000 , Temperature : 0 °C to 70 °C
IPRT
Absolute expanded uncertainty : 8 mK
Comparison in stirred water bath
Interpolation value.
DUT- uncertainty component of hysteresis to be added.
Approved on 27 February 2018
Institute service identifier : CMS/T04
Items for disseminating ITS-90 and PLTS 2000 , Temperature : 231.928 °C
Noble metal thermocouple
Absolute expanded uncertainty : 0.15 K
Tin freezing point cell
Pre-determined value of inhomogeneity included in the CMC entry.
Approved on 27 February 2018
Institute service identifier : CMS/T03
Items for defining ITS-90 , Temperature : 0.01 °C to 419.527 °C
SPRT
Absolute expanded uncertainty : 1.5 mK
Water triple point cell, tin and zinc freezing point cells
Approved on 27 February 2018
Institute service identifier : CMS/T05
Items for defining ITS-90 , Temperature : 0.01 °C to 29.7646 °C
SPRT
Absolute expanded uncertainty : 0.5 mK
Water triple point cell, gallium melting point cell
Approved on 27 February 2018
Institute service identifier : CMS/T05

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