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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)
Costa Rica, LACOMET (Laboratorio Costarricense de Metrologia)
| Matrix or material |
Analyte or component |
Dissemination range of measurement capability |
Range of certified values in reference materials |
| Mass fraction in mg/kg |
Absolute expanded uncertainty in mg/kg |
Mass fraction in |
|
| natural water, synthetic water, acid solution (up 10 %) |
potassium |
0.14 to 1.00E4 |
1.1E-2 to 1.5E2 |
|
|
-
Mechanism for measurement service delivery :
Assigning values to PT scheme samples, internal calibration
-
Approved on
23 October 2019
-
Institute service identifier : 13.1.0.1.3, 32.1.0.0.1 and 34.1.0.0.1
-
CMC ID :
SIM-QM-CR-00000JW7-1
| Matrix or material |
Analyte or component |
Dissemination range of measurement capability |
Range of certified values in reference materials |
| Mass fraction in mg/kg |
Absolute expanded uncertainty in mg/kg |
Mass fraction in |
|
| natural water, synthetic water, acid solution (up 10 %) |
sodium |
0.15 to 1000 |
1.5E-2 to 3.0E1 |
|
|
-
Mechanism for measurement service delivery :
Assigning values to PT scheme samples, internal calibration
-
Approved on
23 October 2019
-
Institute service identifier : 13.1.0.1.3, 32.1.0.0.1 and 34.1.0.0.1
-
CMC ID :
SIM-QM-CR-00000JW6-1
Mass ,
Conventional mass
:
20 g
Mass standard
Absolute expanded uncertainty
:
2.7E-2 mg
Direct comparison
Temperature : 19 ºC to 21 ºC
Relative humidity : 45 % to 60 %
Approved on 26 November 2008
Institute service identifier : LACOMET/MF-MA-PR-01
CMC ID :
SIM-M-CR-000006GT-1
Mass ,
Conventional mass
:
5 mg
Mass standard
Absolute expanded uncertainty
:
2.0E-3 mg
Direct comparison
Temperature : 19 ºC to 21 ºC
Relative humidity : 45 % to 60 %
Approved on 26 November 2008
Institute service identifier : LACOMET/MF-MA-PR-01
CMC ID :
SIM-M-CR-000006GI-1
Mass ,
Conventional mass
:
10 g
Mass standard
Absolute expanded uncertainty
:
2.0E-2 mg
Direct comparison
Temperature : 19 ºC to 21 ºC
Relative humidity : 45 % to 60 %
Approved on 26 November 2008
Institute service identifier : LACOMET/MF-MA-PR-01
CMC ID :
SIM-M-CR-000006GS-1
Fluid flow ,
Volume of liquid
:
1 mL to 100 mL
Volumetric test measure (one mark pipette)
Absolute expanded uncertainty
:
3.2E-3 mL to 2.4E-2 mL
0.00021V + 0.003 V in mL
Gravimetric determination
Air temperature : 18 °C to 24 °C
Liquid : water
Water temperature : 18 °C to 24 °C
Density formula according to Metrologia, 38, 2001, 301-309 The density formula is used with corrections for air-saturated water and compressibility
Approved on 18 October 2019
Institute service identifier : 4.3.9.5.1
CMC ID :
SIM-M-CR-000006HB-2
Fluid flow ,
Volume of liquid
:
5 L to 19 L
Volumetric test measure (graduated neck type)
Relative expanded uncertainty
:
4.0E-2 % to 2.0E-2 %
Gravimetric determination
Air temperature : 18 °C to 24 °C
Liquid : water
Water temperature : 18 °C to 24 °C
Density formula according to Metrologia, 38, 2001, 301-309 The density formula is used with corrections for air-saturated water and compressibility
Approved on 18 October 2019
Institute service identifier : 4.9.9.5.1
CMC ID :
SIM-M-CR-000006H9-2
Items for disseminating ITS-90 and PLTS 2000 ,
Temperature
:
-20 °C to 50 °C
Thermistors
Absolute expanded uncertainty
:
8 mK
Comparison stirred alcohol and water baths
Temperature : 20 °C ± 2 °C
Relative humidity : 55 % ± 10 %/rh
Approved on 17 January 2013
Institute service identifier : LACOMET-02-2.2.3
CMC ID :
SIM-T-CR-00000BOU-1
Mass ,
Conventional mass
:
50 kg
Mass standard
Absolute expanded uncertainty
:
5.0E1 mg
Direct comparison
Temperature : 19 ºC to 21 ºC
Relative humidity : 45 % to 60 %
Approved on 26 November 2008
Institute service identifier : LACOMET/MF-MA-PR-01
CMC ID :
SIM-M-CR-000006H3-1
Mass ,
Conventional mass
:
1 g
Mass standard
Absolute expanded uncertainty
:
1.0E-2 mg
Direct comparison
Temperature : 19 ºC to 21 ºC
Relative humidity : 45 % to 60 %
Approved on 26 November 2008
Institute service identifier : LACOMET/MF-MA-PR-01
CMC ID :
SIM-M-CR-000006GP-1
Mass ,
Conventional mass
:
500 g
Mass standard
Absolute expanded uncertainty
:
0.27 mg
Direct comparison
Temperature : 19 ºC to 21 ºC
Relative humidity : 45 % to 60 %
Approved on 26 November 2008
Institute service identifier : LACOMET/MF-MA-PR-01
CMC ID :
SIM-M-CR-000006GX-1
Mass ,
Conventional mass
:
20 kg
Mass standard
Absolute expanded uncertainty
:
2.0E1 mg
Direct comparison
Temperature : 19 ºC to 21 ºC
Relative humidity : 45 % to 60 %
Approved on 26 November 2008
Institute service identifier : LACOMET/MF-MA-PR-01
CMC ID :
SIM-M-CR-000006H2-1
Mass ,
Conventional mass
:
100 mg
Mass standard
Absolute expanded uncertainty
:
5.0E-3 mg
Direct comparison
Temperature : 19 ºC to 21 ºC
Relative humidity : 45 % to 60 %
Approved on 26 November 2008
Institute service identifier : LACOMET/MF-MA-PR-01
CMC ID :
SIM-M-CR-000006GM-1
Mass ,
Conventional mass
:
500 mg
Mass standard
Absolute expanded uncertainty
:
8.0E-3 mg
Direct comparison
Temperature : 19 ºC to 21 ºC
Relative humidity : 45 % to 60 %
Approved on 26 November 2008
Institute service identifier : LACOMET/MF-MA-PR-01
CMC ID :
SIM-M-CR-000006GO-1
Mass ,
Conventional mass
:
50 mg
Mass standard
Absolute expanded uncertainty
:
4.0E-3 mg
Direct comparison
Temperature : 19 ºC to 21 ºC
Relative humidity : 45 % to 60 %
Approved on 26 November 2008
Institute service identifier : LACOMET/MF-MA-PR-01
CMC ID :
SIM-M-CR-000006GL-1
Mass ,
Conventional mass
:
100 g
Mass standard
Absolute expanded uncertainty
:
5.3E-2 mg
Direct comparison
Temperature : 19 ºC to 21 ºC
Relative humidity : 45 % to 60 %
Approved on 26 November 2008
Institute service identifier : LACOMET/MF-MA-PR-01
CMC ID :
SIM-M-CR-000006GV-1
Mass ,
Conventional mass
:
1 mg
Mass standard
Absolute expanded uncertainty
:
2.0E-3 mg
Direct comparison
Temperature : 19 ºC to 21 ºC
Relative humidity : 45 % to 60 %
Approved on 26 November 2008
Institute service identifier : LACOMET/MF-MA-PR-01
CMC ID :
SIM-M-CR-000006GG-1
Mass ,
Conventional mass
:
2 g
Mass standard
Absolute expanded uncertainty
:
1.3E-2 mg
Direct comparison
Temperature : 19 ºC to 21 ºC
Relative humidity : 45 % to 60 %
Approved on 26 November 2008
Institute service identifier : LACOMET/MF-MA-PR-01
CMC ID :
SIM-M-CR-000006GQ-1
Hygrometers ,
Humidity
:
-30 °C to 20 °C
Dew-point hygrometer
Absolute expanded uncertainty
:
9.0E-2 °C
Uncertainty table
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Direct measurement
Temperature : 21 °C ± 2 °C
Relative humidity : 55 % ± 5 %
Approved on 25 February 2022
CMC ID :
SIM-T-CR-00000LQY-1
Items for defining ITS-90 ,
Temperature
:
660.323 °C
Long stem SPRT
Absolute expanded uncertainty
:
4.6 mK
Aluminum freezing point
Temperature : 20 °C ± 2 °C
Relative humidity : 55 % ± 10 %/rh
Approved on 17 January 2013
Institute service identifier : LACOMET-02-1.3.2
CMC ID :
SIM-T-CR-00000BOT-1
