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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] = [a² + b²]^1/2
Unless otherwise stated the expanded uncertainties given below correspond to k = 2 (at a 95 % level of confidence)

Austria, BEV (Bundesamt für Eich- und Vermessungswesen)

Items for defining ITS-90 , Temperature : -38.8344 °C to 29.7646 °C

Long-stem SPRT

Absolute expanded uncertainty : 1.5 mK

Comparison with fixed points

Ambient temperature : 23 °C

Approved on 17 January 2013

Institute service identifier : BEV/10

Items for defining ITS-90 , Temperature : 419.527 °C

Freezing point of Zinc

Absolute expanded uncertainty : 1.6 mK

Direct comparison

Aluminium powder bath

Approved on 20 May 2010

Institute service identifier : BEV/6

Items for defining ITS-90 , Temperature : 231.928 °C

Freezing point of Tin

Absolute expanded uncertainty : 1.4 mK

Direct comparison

Aluminium powder bath

Approved on 20 May 2010

Institute service identifier : BEV/5

Mass , Mass : 1 mg to 100 mg

Mass standard

Absolute expanded uncertainty : 0.5 µg to 0.7 µg

Comparison in air

Temperature : 18 °C to 23 °C

Relative humidity : 40 % to 60 %

Uncertainty scales with measurand level.
The volume of the mass standards is known.

Approved on 31 January 2018

Pressure , Absolute pressure : 5000 Pa to 1.20E5 Pa

Digital piston manometer

Absolute expanded uncertainty

0.5 + 4E-05p

p pressure in Pa

The uncertainty is expressed in Pa

Gas medium

Uncertainty values range from 0.7 Pa to 5.3 Pa

Approved on 21 October 2001

Pressure , Gauge pressure : 3500 Pa to 1.70E5 Pa

Pressure balance

Absolute expanded uncertainty

0.5 + 3E-05p

p pressure in Pa

The uncertainty is expressed in Pa

Gas medium

Uncertainty values range from 0.6 Pa to 6 Pa

Approved on 21 October 2001

Ionizing radiation

Activity per unit mass , Single nuclide solution : 8.00E5 Bq/g to 1.00E10 Bq/g

Relative expanded uncertainty 1.9 %

Well type ionization chamber, balance

Tc-99m, no further specifications

Reference standard : Secondary standard ionization chamber

Source of traceability : NPL (Bq), BEV (g)

Approved on 21 October 2001

Institute service identifier : EUR-RAD-BEV-2025

Ionizing radiation

Activity per unit mass , Single nuclide solution : 3.00E5 Bq/g to 1.00E10 Bq/g

Relative expanded uncertainty 1.6 %

Well type ionization chamber, balance

In-111, no further specifications

Reference standard : Secondary standard ionization chamber

Source of traceability : NPL (Bq), BEV (g)

Approved on 21 October 2001

Institute service identifier : EUR-RAD-BEV-2027

Ionizing radiation

Activity per unit mass , Single nuclide solution : 2.00E5 Bq/g to 1.00E10 Bq/g

Relative expanded uncertainty 1.5 %

Well type ionization chamber, balance

Zn-65, no further specifications

Reference standard : Secondary standard ionization chamber

Source of traceability : NPL (Bq), BEV (g)

Approved on 21 October 2001

Institute service identifier : EUR-RAD-BEV-2015

Ionizing radiation

Personal dose equivalent/rate, superficial , Dosemeter : 1.00E-6 Sv/h to 50 Sv/h

Relative expanded uncertainty 4 %

Conversion coefficient, irradiation in a calibrated field on ISO water slab phantom or PMMA rod phantom, substitution of the graphite cavity ionisation chamber

Co-60, ISO-4037, 42 TBq (31.12.2008), 50 GBq (31.12.2008), 3 GBq (31.12.2008), 0.4 GBq (31.12.2008), 1 m to 18 m SDD

Reference standard : Graphite cavity ionisation chamber

Source of traceability : BEV

Approved on 24 January 2012

Institute service identifier : EUR-RAD-BEV-1050

Ionizing radiation

Activity per unit mass , Single nuclide solution : 2.00E6 Bq/g to 1.00E10 Bq/g

Relative expanded uncertainty 2.2 %

Well type ionization chamber, balance

Hg-197, no further specifications

Reference standard : Secondary standard ionization chamber

Source of traceability : NPL (Bq), BEV (g)

Approved on 21 October 2001

Institute service identifier : EUR-RAD-BEV-2044

Ionizing radiation

Activity per unit mass , Single nuclide solution : 2.00E6 Bq/g to 1.00E10 Bq/g

Relative expanded uncertainty 1.7 %

Well type ionization chamber, balance

Re-188, no further specifications

Reference standard : Secondary standard ionization chamber

Source of traceability : NPL (Bq), BEV (g)

Approved on 21 October 2001

Institute service identifier : EUR-RAD-BEV-2052

Ionizing radiation

Personal dose equivalent/rate, penetrating , Dosemeter : 0.05 Sv/h to 5 Sv/h

Relative expanded uncertainty 5 %

Conversion coefficient, calibration on ISO water slab phantom against a calibrated monitor chamber free in air

X-ray, 50 kV to 420 kV, ISO-4037 High air-kerma rate Series, 60 kV to 300 kV, max. 30 mA

Reference standard : Free air parallel plate ionisation chamber

Source of traceability : BEV

Approved on 24 January 2012

Institute service identifier : EUR-RAD-BEV-1041

Ionizing radiation

Surface emission rate , Contamination monitors : 150 s^-1 to 4000 s^-1

Relative expanded uncertainty 4 %

Large area solid source

Sr-90/Y-90, rectangular, planar sources

Reference standard : Large area proportional counter

Source of traceability : OMH, PTB

Approved on 21 October 2001

Institute service identifier : EUR-RAD-BEV-2060

Ionizing radiation

Personal dose equivalent/rate, penetrating , Dosemeter : 0.05 Sv/h to 5 Sv/h

Relative expanded uncertainty 5 %

Conversion coefficient, calibration on ISO water slab phantom against a calibrated monitor chamber free in air

X-ray, 10 kV to 50 kV, ISO-4037 High air-kerma rate Series, 10 kV to 30 kV, max. 60 mA

Reference standard : Free air parallel plate ionisation chamber

Source of traceability : BEV

Approved on 24 January 2012

Institute service identifier : EUR-RAD-BEV-1040

Ionizing radiation

Personal dose equivalent/rate, penetrating , Dosemeter : 0.01 Sv/h to 1 Sv/h

Relative expanded uncertainty 5 %

Conversion coefficient, calibration on ISO water slab phantom against a calibrated monitor chamber free in air

X-ray, 50 kV to 420 kV, ISO-4037 Wide-spectrum Series, 60 kV to 300 kV, max. 30 mA

Reference standard : Free air parallel plate ionisation chamber

Source of traceability : BEV

Approved on 24 January 2012

Institute service identifier : EUR-RAD-BEV-1039

Ionizing radiation

Surface emission rate , Contamination monitors : 200 s^-1 to 5000 s^-1

Relative expanded uncertainty 4 %

Large area solid source

Tl-204, rectangular, planar sources

Reference standard : Large area proportional counter

Source of traceability : OMH, PTB

Approved on 21 October 2001

Institute service identifier : EUR-RAD-BEV-2061

Ionizing radiation

Kerma/rate , Dosemeter : 1.00E-6 Gy/s to 1.00E-4 Gy/s

Relative expanded uncertainty 0.8 %

Calibration against a calibrated monitor chamber free in air

X-ray, 50 kV to 420 kV, IEC 61267 RQA Series, 40 kV to 150 kV, max. 30 mA

Reference standard : Free air parallel plate ionisation chamber

Source of traceability : BEV

Approved on 24 January 2012

Institute service identifier : EUR-RAD-BEV-1015

Ionizing radiation

Activity per unit mass , Reference material : 1 Bq/g to 1000 Bq/g

Relative expanded uncertainty 1.5E1 %

Gamma ray spectrometer

Am-241, reference material, mixed gamma ray nuclides, matrix quartz sand

Reference standard : Gamma ray spectrometer

Source of traceability : OMH (Bq), BEV (g)

The following radionuclides are present in this reference material: Mn-54, Co-57, Co-60, Am-241, Cd-109, Ba-133, Cs-134, and Cs-137

Approved on 21 October 2001

Institute service identifier : EUR-RAD-BEV-2069

Ionizing radiation

Activity per unit mass , Reference material : 1 Bq/g to 1000 Bq/g

Relative expanded uncertainty 4 %

Gamma ray spectrometer

Ba-133, reference material, mixed gamma ray nuclides, matrix bentonite

Reference standard : Gamma ray spectrometer

Source of traceability : OMH (Bq), BEV (g)

The following radionuclides are present in this reference material: Mn-54, Co-57, Co-60, Am-241, Cd-109, Ba-133, Cs-134, and Cs-137

Approved on 21 October 2001

Institute service identifier : EUR-RAD-BEV-2068

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