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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)
Bulgaria, BIM (Bulgarian Institute of Metrology)
| Matrix or material |
Dissemination range of measurement capability |
Range of certified values in reference materials |
| pH in |
Absolute expanded uncertainty in |
pH in |
Absolute expanded uncertainty in |
| aqueous pH buffer solution |
6.7 to 7.6 |
4.0E-3 |
|
|
-
Mechanism for measurement service delivery :
Calibration services, value assignment for proficiency testing scheme samples
-
Approved on
25 August 2020
-
Institute service identifier : 1.6.b-1
| Matrix or material |
Dissemination range of measurement capability |
Range of certified values in reference materials |
| pH in |
Absolute expanded uncertainty in |
pH in |
Absolute expanded uncertainty in |
| aqueous pH buffer solution |
1.5 to 1.9 |
1.0E-2 |
|
|
-
Mechanism for measurement service delivery :
Calibration services, value assignment for proficiency testing scheme samples
-
Approved on
25 August 2020
-
Institute service identifier : 1.6.a-1
| Matrix or material |
Dissemination range of measurement capability |
Range of certified values in reference materials |
| pH in |
Absolute expanded uncertainty in |
pH in |
Absolute expanded uncertainty in |
| aqueous pH buffer solution |
9.8 to 10.2 |
8.0E-3 |
|
|
-
Mechanism for measurement service delivery :
Calibration services, value assignment for proficiency testing scheme samples
-
Approved on
25 August 2020
-
Institute service identifier : 1.6.c-2
| Matrix or material |
Dissemination range of measurement capability |
Range of certified values in reference materials |
| pH in |
Absolute expanded uncertainty in |
pH in |
Absolute expanded uncertainty in |
| aqueous pH buffer solution |
3.6 to 4.2 |
5.0E-3 |
|
|
-
Mechanism for measurement service delivery :
Calibration services, value assignment for proficiency testing scheme samples
-
Approved on
25 August 2020
-
Institute service identifier : 1.6.a-2
| Matrix or material |
Dissemination range of measurement capability |
Range of certified values in reference materials |
| pH in |
Absolute expanded uncertainty in |
pH in |
Absolute expanded uncertainty in |
| aqueous pH buffer solution |
9 to 9.4 |
4.0E-3 |
|
|
-
Mechanism for measurement service delivery :
Calibration services, value assignment for proficiency testing scheme samples
-
Approved on
25 August 2020
-
Institute service identifier : 1.6.c-1
| Matrix or material |
Analyte or component |
Dissemination range of measurement capability |
Range of certified values in reference materials |
| Mass fraction in mg/kg |
Relative expanded uncertainty in % |
Mass fraction in |
|
| blood serum |
copper |
1 to 50 |
4.2 to 5 |
|
|
-
Mechanism for measurement service delivery :
Reference measurement service and reference value assignment for PT
-
Approved on
15 October 2019
-
Institute service identifier : CHM 10
Linear vibration ,
Acceleration
:
1 m/s2 to 1000 m/s2
Acceleration measuring instrument
Relative expanded uncertainty
:
2 %
Comparison, ISO 16063-21
Frequency : 6.3 kHz to 10 kHz
Approved on 18 October 2005
Measurement microphones ,
Pressure sensitivity level
Measurement microphone type LS1P
Absolute expanded uncertainty
:
0.18 dB
Pressure sequential comparison
Frequency : 5 kHz to 10 kHz
Approved on 18 October 2005
Sound measuring instruments ,
Free-field response level
Sound level meter
Absolute expanded uncertainty
:
0.4 dB
Sequential comparison
Frequency : 63 Hz to 4 kHz
Approved on 18 October 2005
Spectral properties of materials ,
Transmittance, regular, spectral
:
0.1 to 1
Spectrally-neutral material
Relative expanded uncertainty
:
0.65 %
Direct measuring with standard spectrophotometer
Wavelength : 400 nm to 700 nm
Bandwidth : 0.5 nm to 5 nm
Approved on 21 October 2001
DC resistance ,
DC resistance standards and sources: multiple ranges
:
1 Ω to 1.00E8 Ω
Multifunction calibrator: R
Relative expanded uncertainty
:
1 µΩ/Ω to 5.5E1 µΩ/Ω
Uncertainty table
{"row_1":{"col_1":"","col_2":"Expanded uncertainty"},"row_2":{"col_1":"1 ohm","col_2":"1"},"row_3":{"col_1":"1.9 ohm","col_2":"1"},"row_4":{"col_1":"10 ohm","col_2":"1"},"row_5":{"col_1":"19 ohm","col_2":"1"},"row_6":{"col_1":"100 ohm","col_2":"1"},"row_7":{"col_1":"190 ohm","col_2":"1"},"row_8":{"col_1":"1 kohm","col_2":"1.5"},"row_9":{"col_1":"1.9 ohm","col_2":"1.5"},"row_10":{"col_1":"10 kohm","col_2":"2.1"},"row_11":{"col_1":"19 kohm","col_2":"2.1"},"row_12":{"col_1":"100 kohm","col_2":"2.4"},"row_13":{"col_1":"190 kohm","col_2":"2.4"},"row_14":{"col_1":"1 Mohm","col_2":"4.5"},"row_15":{"col_1":"19 Mohm","col_2":"4.5"},"row_16":{"col_1":"10 Mohm","col_2":"6.0"},"row_17":{"col_1":"19 Mohm","col_2":"6.0"},"row_18":{"col_1":"100 Mohm","col_2":"55"}}
Comparison by means of current comparator bridge and automated high resistance bridge
R : decade values and divisible by 1.9
Approved on 06 August 2013
Institute service identifier : 79
High voltage and current ,
High AC current: current transformer phase displacement
:
-20 mrad to 20 mrad
Current transformer
Absolute expanded uncertainty
:
9.0E-2 mrad
Comparison with standard current transformer
Primary : 0.1 A to 5 A
Secondary : 1 A or 5 A
Frequency : 50 Hz
Approved on 06 August 2013
Institute service identifier : 68
DC resistance ,
DC resistance meters: low values
:
1.00E-4 Ω to 1 Ω
Micro-ohmmeter, multimeter: R
Relative expanded uncertainty
:
1.2E2 µΩ/Ω to 3 µΩ/Ω
Uncertainty table
{"row_1":{"col_1":"","col_2":"Expanded uncertainty"},"row_2":{"col_1":"0.0001 ohm","col_2":"120"},"row_3":{"col_1":"0.001 ohm","col_2":"70"},"row_4":{"col_1":"0.01 ohm","col_2":"70"},"row_5":{"col_1":"0.1 ohm","col_2":"70"},"row_6":{"col_1":"1 ohm","col_2":"3.0"}}
Direct measurement
R : decade values
Approved on 06 August 2013
Institute service identifier : 80
High voltage and current ,
High AC voltage: voltage transformer ratio error
:
-0.2 % to 0.2 %
Voltage transformer
Absolute expanded uncertainty
:
9.0E-3 %
Comparison with reference standard
Primary voltage : 2 kV to 100 kV
Secondary voltage : 15 V to 120 V
Frequency : 50 Hz
Approved on 06 August 2013
Institute service identifier : 95
DC current (up to 100 A) ,
DC current meters: intermediate values
:
1.00E-4 A to 2 A
Multimeter, multifunction transfer standard
Relative expanded uncertainty
:
8 µA/A to 5.3E1 µA/A
Uncertainty table
{"row_1":{"col_1":"","col_2":"Expanded uncertainty"},"row_2":{"col_1":"100 µA to 200 µA","col_2":"8"},"row_3":{"col_1":"200 µA to 2 mA","col_2":"13 to 11"},"row_4":{"col_1":"2 mA to 20 mA","col_2":"13 to 8"},"row_5":{"col_1":"20 mA to 200 mA","col_2":"16 to 10"},"row_6":{"col_1":"200 mA to 2 A","col_2":"25 to 53"}}
Direct measurement with calibrator
Approved on 06 August 2013
Institute service identifier : 16
High voltage and current ,
High DC voltage: average value
:
0.2 kV to 100 kV
DC voltage measuring system, DC voltage source
Absolute expanded uncertainty
:
0.1 kV to 0 kV
Comparison with reference measuring system
Approved on 07 February 2019
Institute service identifier : 63
Pressure ,
Negative gauge pressure
:
1.00E4 Pa to 1.00E5 Pa
Pressure balance
Absolute expanded uncertainty
5E-04p p pressure in Pa
The uncertainty is expressed in Pa
Gas medium
Uncertainty values range from 5 Pa to 50 Pa
Approved on 11 October 2005
Institute service identifier : EUR-BIM-M-043
Pressure ,
Absolute pressure
:
2.00E4 Pa to 7.00E6 Pa
Pressure balance
Absolute expanded uncertainty
1E-04p p pressure in Pa
The uncertainty is expressed in Pa
Gas medium
Uncertainty values range from 2 Pa to 7E+02 Pa
Approved on 11 October 2005
Institute service identifier : EUR-BIM-M-041
Frequency ,
Frequency
:
1 MHz to 100 MHz
General frequency source
Relative expanded uncertainty
:
2.0E-9 Hz/Hz
Direct frequency measurement
Averaging time : 100 s
Approved on 18 November 2009
Institute service identifier : BIM/2.2.1.3
Frequency ,
Frequency
:
10 MHz
Local frequency standard
Relative expanded uncertainty
:
6.0E-13 Hz/Hz
Frequency comparator
Averaging time : 1 day
Approved on 18 November 2009
Institute service identifier : BIM/2.1.1.4
