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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)
Chile, CESMEC (Centro de Estudios, Medición y Certificación de Calidad)
Items for disseminating ITS-90 and PLTS 2000 , Temperature : 250 °C to 450 °C
Digital system thermometer (PRT sensor)
Absolute expanded uncertainty : 5.0E1 mK
Comparison, vertical block furnace
Hysteresis uncertainty for each IPRT must be added to the combined uncertainty quoted in the Calibration Report
Approved on 12 July 2007
Items for disseminating ITS-90 and PLTS 2000 , Temperature : 10 °C to 90 °C
Platinum Resistance Thermometer
Absolute expanded uncertainty : 1.0E1 mK
Comparison, stirred water bath
Hysteresis uncertainty for each IPRT must be added to the combined uncertainty quoted in the Calibration Report
Approved on 12 July 2007
Items for disseminating ITS-90 and PLTS 2000 , Temperature : 450 °C to 660 °C
Digital system thermometer (PRT sensor)
Absolute expanded uncertainty : 7.0E1 mK
Comparison, vertical block furnace
Hysteresis uncertainty for each IPRT must be added to the combined uncertainty quoted in the Calibration Report
Approved on 12 July 2007
Items for disseminating ITS-90 and PLTS 2000 , Temperature : 250 °C to 450 °C
Platinum Resistance Thermometer
Absolute expanded uncertainty : 5.0E1 mK
Comparison, vertical block furnace
Hysteresis uncertainty for each IPRT must be added to the combined uncertainty quoted in the Calibration Report
Approved on 12 July 2007
Items for disseminating ITS-90 and PLTS 2000 , Temperature : -40 °C to 10 °C
Digital system thermometer (PRT sensor)
Absolute expanded uncertainty : 2.5E1 mK
Comparison, stirred alcohol bath
Hysteresis uncertainty for each IPRT must be added to the combined uncertainty quoted in the Calibration Report
Approved on 12 July 2007
Items for disseminating ITS-90 and PLTS 2000 , Temperature : -40 °C to 10 °C
Platinum Resistance Thermometer
Absolute expanded uncertainty : 1.5E1 mK
Comparison, stirred alcohol bath
Hysteresis uncertainty for each IPRT must be added to the combined uncertainty quoted in the Calibration Report
Approved on 12 July 2007
Items for disseminating ITS-90 and PLTS 2000 , Temperature : 10 °C to 90 °C
Digital system thermometer (PRT sensor)
Absolute expanded uncertainty : 1.5E1 mK
Comparison, stirred water bath
Hysteresis uncertainty for each IPRT must be added to the combined uncertainty quoted in the Calibration Report
Approved on 12 July 2007
Items for disseminating ITS-90 and PLTS 2000 , Temperature : 90 °C to 250 °C
Platinum Resistance Thermometer
Absolute expanded uncertainty : 1.5E1 mK
Comparison, stirred silicon oil bath
Hysteresis uncertainty for each IPRT must be added to the combined uncertainty quoted in the Calibration Report
Approved on 12 July 2007
Items for disseminating ITS-90 and PLTS 2000 , Temperature : 450 °C to 660 °C
Platinum Resistance Thermometer
Absolute expanded uncertainty : 7.0E1 mK
Comparison, vertical block furnace
Hysteresis uncertainty for each IPRT must be added to the combined uncertainty quoted in the Calibration Report
Approved on 12 July 2007
Items for disseminating ITS-90 and PLTS 2000 , Temperature : 90 °C to 250 °C
Digital system thermometer (PRT sensor)
Absolute expanded uncertainty : 2.5E1 mK
Comparison, stirred silicon oil bath
Hysteresis uncertainty for each IPRT must be added to the combined uncertainty quoted in the Calibration Report
Approved on 12 July 2007
Chile, DICTUC S.A. (Laboratorio Custodio de Patrones Nacionales de Longitud, Pontificia Universidad Católica de Chile)
Linear dimensions , End standards : 0.5 mm to 100 mm
Gauge block: central length L
Absolute expanded uncertainty
60 + 0.6L

L in mm, values range from 60 nm to 120 nm

The uncertainty is expressed in nm

Mechanical comparison to gauge block
Material : steel
Approved on 06 October 2009
Chile, INN (Instituto Nacional de Normalización)
Mass , Conventional mass : 20 kg
Standard weights
Absolute expanded uncertainty : 1.0E1 mg
Substitution weighing with buoyancy correction
Laboratory temperature : 18 °C to 27 °C, the allowed temperature change in 1 hour is equal to ± 0.5 ºC, in 4 hours: ± 0.7 ºC and in 24 hours: ± 1 ºC
Humidity : 40 % to 60 %, the allowed humidity change in 4 hours is equal to ± 10 %
Service provided by CESMEC (Centro de Estudios, Medición y Certificación de Calidad).
Approved on 04 May 2006
Institute service identifier : INN/131-750
Mass , Conventional mass : 2 kg
Standard weights
Absolute expanded uncertainty : 1 mg
Substitution weighing with buoyancy correction
Laboratory temperature : 18 °C to 27 °C, the allowed temperature change in 1 hour is equal to ± 0.5 ºC, in 4 hours: ± 0.7 ºC and in 24 hours: ± 1 ºC
Humidity : 40 % to 60 %, the allowed humidity change in 4 hours is equal to ± 10 %
Service provided by CESMEC (Centro de Estudios, Medición y Certificación de Calidad).
Approved on 04 May 2006
Institute service identifier : INN/131-750
Mass , Conventional mass : 10 mg
Standard weights
Absolute expanded uncertainty : 2.0E-3 mg
Substitution weighing with buoyancy correction
Laboratory temperature : 18 °C to 27 °C, the allowed temperature change in 1 hour is equal to ± 0.5 ºC, in 4 hours: ± 0.7 ºC and in 24 hours: ± 1 ºC
Humidity : 40 % to 60 %, the allowed humidity change in 4 hours is equal to ± 10 %
Service provided by CESMEC (Centro de Estudios, Medición y Certificación de Calidad).
Approved on 04 May 2006
Institute service identifier : INN/131-750
Mass , Conventional mass : 20 mg
Standard weights
Absolute expanded uncertainty : 3.0E-3 mg
Substitution weighing with buoyancy correction
Laboratory temperature : 18 °C to 27 °C, the allowed temperature change in 1 hour is equal to ± 0.5 ºC, in 4 hours: ± 0.7 ºC and in 24 hours: ± 1 ºC
Humidity : 40 % to 60 %, the allowed humidity change in 4 hours is equal to ± 10 %
Service provided by CESMEC (Centro de Estudios, Medición y Certificación de Calidad).
Approved on 04 May 2006
Institute service identifier : INN/131-750
Mass , Conventional mass : 50 kg
Standard weights
Absolute expanded uncertainty : 7.5E1 mg
Substitution weighing with buoyancy correction
Laboratory temperature : 18 °C to 27 °C, the allowed temperature change in 1 hour is equal to ± 0.5 ºC, in 4 hours: ± 0.7 ºC and in 24 hours: ± 1 ºC
Humidity : 40 % to 60 %, the allowed humidity change in 4 hours is equal to ± 10 %
Service provided by CESMEC (Centro de Estudios, Medición y Certificación de Calidad).
Approved on 04 May 2006
Institute service identifier : INN/131-750
Mass , Conventional mass : 1 mg
Standard weights
Absolute expanded uncertainty : 2.0E-3 mg
Substitution weighing with buoyancy correction
Laboratory temperature : 18 °C to 27 °C, the allowed temperature change in 1 hour is equal to ± 0.5 ºC, in 4 hours: ± 0.7 ºC and in 24 hours: ± 1 ºC
Humidity : 40 % to 60 %, the allowed humidity change in 4 hours is equal to ± 10 %
Service provided by CESMEC (Centro de Estudios, Medición y Certificación de Calidad).
Approved on 04 May 2006
Institute service identifier : INN/131-750
Force , Force : 0.1 MN to 1 MN
STFR 3 MN
Relative expanded uncertainty : 5.0E-2 %
Force reference transducer system
Temperature : (22 ± 1) ºC
Humidity : (50 ± 10) %
Service provided by IDIC (Instituto de Investigaciones y Control).
Approved on 04 May 2006
Force , Force : 1 kN to 10 kN
STFR 50 kN
Relative expanded uncertainty : 5.0E-2 %
Force reference transducer system
Temperature : (22 ± 1) ºC
Humidity : (50 ± 10) %
Service provided by IDIC (Instituto de Investigaciones y Control).
Approved on 04 May 2006
Mass , Conventional mass : 20 g
Standard weights
Absolute expanded uncertainty : 2.5E-2 mg
Substitution weighing with buoyancy correction
Laboratory temperature : 18 °C to 27 °C, the allowed temperature change in 1 hour is equal to ± 0.5 ºC, in 4 hours: ± 0.7 ºC and in 24 hours: ± 1 ºC
Humidity : 40 % to 60 %, the allowed humidity change in 4 hours is equal to ± 10 %
Service provided by CESMEC (Centro de Estudios, Medición y Certificación de Calidad).
Approved on 04 May 2006
Institute service identifier : INN/131-750

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