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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)
Colombia, INM (CO) (Instituto Nacional de Metrología de Colombia)
Matrix or material Dissemination range of measurement capability Range of certified values in reference materials
Electrolytic conductivity in S/m Absolute expanded uncertainty in S/m Electrolytic conductivity in S/m Absolute expanded uncertainty in S/m
aqueous solution 0.15 to 0.5 8.0E-4 to 1.0E-3 0.15 to 0.5 8.0E-4 to 1.0E-3
  • Mechanism for measurement service delivery : INM-002-04
  • Data given to 25°C
  • Approved on 23 October 2019
  • Institute service identifier : INM-002-04
  • CMC ID : SIM-QM-CO-00000JWK-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 9.5 to 10.5 5.9E-2 9.5 to 10.5 5.9E-2
  • Mechanism for measurement service delivery : INM-001-04
  • Data given to 25°C. Declared uncertainties do not include the uncertainty contribution due to the Bates-Guggenheim convention.
  • Approved on 23 October 2019
  • Institute service identifier : INM-001-04
  • CMC ID : SIM-QM-CO-00000JWG-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 9.1 to 9.3 3.5E-2 9.1 to 9.3 3.5E-2
  • Mechanism for measurement service delivery : INM-001-03
  • Data given to 25°C. Declared uncertainties do not include the uncertainty contribution due to the Bates-Guggenheim convention.
  • Approved on 23 October 2019
  • Institute service identifier : INM-001-03
  • CMC ID : SIM-QM-CO-00000JWF-1
     
Matrix or material Dissemination range of measurement capability Range of certified values in reference materials
Electrolytic conductivity in µS/cm Absolute expanded uncertainty in µS/cm Electrolytic conductivity in µS/cm Absolute expanded uncertainty in µS/cm
aqueous solution 160 to 1500 0.33 to 3.1 160 to 1500 1.6 to 6
  • Mechanism for measurement service delivery : INM-002-07
  • Data given to 25 °C
  • Approved on 30 September 2024
  • Institute service identifier : INM-002-07
  • CMC ID : SIM-QM-CO-00000PKT-1
     
Matrix or material Dissemination range of measurement capability Range of certified values in reference materials
Electrolytic conductivity in µS/cm Absolute expanded uncertainty in µS/cm Electrolytic conductivity in µS/cm Absolute expanded uncertainty in µS/cm
aqueous solution 200 1.1 200 1.1
  • Mechanism for measurement service delivery : INM-002-01
  • Data given at 25°C
  • Approved on 15 July 2017
  • Institute service identifier : INM-002-01
  • CMC ID : SIM-QM-CO-000001IK-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 6.7 to 7 9.0E-3 6.7 to 7 9.0E-3
  • Mechanism for measurement service delivery : INM-001-01
  • Data given to 25°C. Declared uncertainties do not include the uncertainty contribution due to the Bates-Guggenheim convention.
  • Approved on 23 October 2019
  • Institute service identifier : INM-001-01
  • CMC ID : SIM-QM-CO-00000JWE-1
     
Matrix or material Dissemination range of measurement capability Range of certified values in reference materials
Electrolytic conductivity in mS/m Absolute expanded uncertainty in mS/m Electrolytic conductivity in mS/m Absolute expanded uncertainty in mS/m
aqueous solution 1.5 to 15 1.5E-2 to 0.15 1.5 to 15 2.0E-2 to 0.18
  • Mechanism for measurement service delivery : INM-002-06
  • Electrolytic Conductivity value at 25 °C. 
  • Approved on 21 October 2025
  • Institute service identifier : INM-002-06
  • CMC ID : SIM-QM-CO-00000PKU-1
     
Matrix or material Dissemination range of measurement capability Range of certified values in reference materials
Electrolytic conductivity in S/m Absolute expanded uncertainty in S/m Electrolytic conductivity in S/m Absolute expanded uncertainty in S/m
aqueous solution 0.15 to 1.5 2.4E-4 to 2.4E-3 0.15 to 1.5 7.5E-4 to 7.5E-3
  • Mechanism for measurement service delivery : INM-002-04
  • Data given to 25 °C
  • Approved on 30 September 2024
  • Institute service identifier : INM-002-04
  • CMC ID : SIM-QM-CO-00000PKV-1
     
Matrix or material Dissemination range of measurement capability Range of certified values in reference materials
Electrolytic conductivity in µS/cm Absolute expanded uncertainty in µS/cm Electrolytic conductivity in µS/cm Absolute expanded uncertainty in µS/cm
aqueous solution 1000 3.3 1000 3.3
  • Mechanism for measurement service delivery : INM-002-03
  • Data given to 25°C
  • Approved on 15 July 2017
  • Institute service identifier : INM-002-03
  • CMC ID : SIM-QM-CO-000001IM-1
     
Matrix or material Dissemination range of measurement capability Range of certified values in reference materials
Electrolytic conductivity in µS/cm Absolute expanded uncertainty in µS/cm Electrolytic conductivity in µS/cm Absolute expanded uncertainty in µS/cm
aqueous solution 500 1.7 500 1.7
  • Mechanism for measurement service delivery : INM-002-02
  • Data given to 25°C
  • Approved on 15 July 2017
  • Institute service identifier : INM-002-02
  • CMC ID : SIM-QM-CO-000001IL-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 4 to 4.2 7.0E-3 to 9.0E-3 4 to 4.2 7.0E-3 to 9.0E-3
  • Mechanism for measurement service delivery : INM-001-02
  • Data given to 25°C. Declared uncertainties do not include the uncertainty contribution due to the Bates-Guggenheim convention.
  • Approved on 15 July 2017
  • Institute service identifier : INM-001-02
  • CMC ID : SIM-QM-CO-000001CK-1
     
Matrix or material Dissemination range of measurement capability Range of certified values in reference materials
Electrolytic conductivity in mS/m Absolute expanded uncertainty in mS/m Electrolytic conductivity in mS/m Absolute expanded uncertainty in mS/m
aqueous solution 5 to 14.3 0.1 to 0.29 5 to 14.3 0.1 to 0.29
  • Mechanism for measurement service delivery : INM-002-05
  • Data given to 25°C
  • Approved on 23 October 2019
  • Institute service identifier : INM-002-05
  • CMC ID : SIM-QM-CO-00000JWJ-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 mg/kg Absolute expanded uncertainty in mg/kg
fresh water calcium 8.16 to 28.5 0.25 to 0.33 8.2 to 28 0.3 to 0.63
fresh water iron 1.06 to 1000 0.1 to 2.8E1 36.5 to 1000 2.4 to 6.9E1
fresh water magnesium 1.91 to 14.2 6.0E-2 to 0.11 1.95 to 7.38 7.6E-2 to 0.18
fresh water nickel 0.44 to 50 5.5E-2 to 0.88 15.5 to 25 0.98 to 1.6
fresh water potassium 1.91 to 5 6.0E-2 to 0.2 1.91 to 5 6.6E-2 to 0.21
fresh water sodium 3 to 18.6 7.0E-2 to 0.28 3 to 18.6 0.13 to 0.75
fresh water zinc 1.06 to 800 0.1 to 1.0E1 55 to 800 2.9 to 4.2E1
  • Mechanism for measurement service delivery : CRM provider by elements in fresh water code INM-011-01 Lot 201110
  • source of traceability SRM 3109a (Lot No. 130213)
  • Approved on 01 September 2023
  • Institute service identifier : INM-011-01
  • CMC ID : SIM-QM-CO-00000O21-1,SIM-QM-CO-00000O25-1,SIM-QM-CO-00000O22-1,SIM-QM-CO-00000O1Z-1,SIM-QM-CO-00000O23-1,SIM-QM-CO-00000O20-1,SIM-QM-CO-00000O24-1
     
Hygrometers , Humidity : 12 %rh to 85 %rh
Relative humidity (capacitive hygrometer)
Absolute expanded uncertainty : 1.7 %rh to 2.5 %rh
Chilled mirror hygrometer, and two pressure humidity generator
Continuous gas flow : maximum 10 l/min
Test chamber temperature : 20 °C ± 0.2 °C
Atmospheric pressure : 751 hPa ± 10 hPa
Room temperature : 21 °C ± 2 °C
Relative humidity : 50 %RH ± 15 %RH
Approved on 23 October 2015
Institute service identifier : INM-L02-39
CMC ID : SIM-T-CO-00000757-1
 
Frequency , Frequency : 1 MHz to 10 MHz
Frequency meter
Relative expanded uncertainty : 1.0E-10 Hz/Hz
Direct frequency measurement of its time base
Measurement time : 1 d
Gate time : 1 s
Averaging time : 1 s to 32768 s
Amplitude : 100 mVrms to 12 Vrms (50 Ω), 100 mVrms to 30 Vrms (1 MΩ)
Approved on 10 February 2015
Institute service identifier : INM-L08-07
CMC ID : SIM-TF-CO-00000AB2-1
 
Frequency , Frequency : 100 kHz
Local frequency standard
Relative expanded uncertainty : 6.0E-13 Hz/Hz
Measurement of phase difference
Measurement time : 20 h, 72 h, 100 h
Gate time : 1 s
Averaging time : 1 s to 32768 s, 1 s to 65536 s, 1 s to 131072 s
Approved on 10 February 2015
Institute service identifier : INM-L08-09
CMC ID : SIM-TF-CO-00000AB4-1
 
Mass , Mass : 1 kg to 10 kg
Mass standard
Absolute expanded uncertainty : 0.5 mg to 5 mg
Direct comparison
Temperature : 18 °C to 27 °C
Relative humidity : 40 % to 60 %
Approved on 29 September 2019
Institute service identifier : INM-L01-07
CMC ID : SIM-M-CO-00000K33-1
 
DC resistance , DC resistance standards and sources: high values : 1 MΩ to 1000 MΩ
Fixed resistor, resistance box
Absolute expanded uncertainty : 2.1E-5 MΩ to 0.14 MΩ
Uncertainty table
{"row_1":{"col_1":"","col_2":"Absolute expanded uncertainty","col_3":"Current"},"row_2":{"col_1":"> 1 MΩ to 10 MΩ","col_2":"0.000021 MΩ to 0.000092 MΩ","col_3":"10 µA"},"row_3":{"col_1":"> 10 MΩ to 100 MΩ","col_2":"0.0011 MΩ to 0.0033 MΩ","col_3":"1 µA"},"row_4":{"col_1":"> 0.1 GΩ to 1 GΩ","col_2":"0.00010 GΩ to 0.00014 GΩ","col_3":"100 nA"}}
Direct measurement
Room temperature : 23.0 ºC
Current : 100 nA to 10 μA
Approved on 01 February 2022
Institute service identifier : INM-L03-13
CMC ID : SIM-EM-CO-00000N2U-1
 
AC voltage (up to the MHz range) , AC voltage: sources : 2.00E-3 V to 100 V
AC voltage source, multifunction calibrator
Absolute expanded uncertainty : 4.2E-6 V to 6.9E-3 V
Uncertainty table
{"row_1": {"col_1":"", "col_2":"50 Hz to 20 kHz"}, "row_2": {"col_1":"2 mV to < 2.2 mV", "col_2":"0.0042 mV"}, "row_3": {"col_1":"2.2 mV to < 22 mV", "col_2":"0.0042 mV to 0.0061 mV"}, "row_4": {"col_1":"22 mV to < 220 mV", "col_2":"0.0091 mV to 0.027 mV"}, "row_5": {"col_1":"0.22 V to < 2.2 V", "col_2":"0.000021 V to 0.00012 V"}, "row_6": {"col_1":"2.2 V to < 22 V", "col_2":"0.00016 V to 0.0012 V"}, "row_7": {"col_1":"22 V to 100 V", "col_2":"0.0019 V to 0.0069 V"}}
Substitution using an 8-digits multimeter
 Frequency : 50 Hz to 20 kHz
Approved on 10 February 2022
Institute service identifier : INM-L03-32
CMC ID : SIM-EM-CO-00000N2F-1
 
DC current (up to 100 A) , DC current sources: intermediate values : 2 A to 20 A
DC current source, multifunction calibrator, transconductance amplifier
Absolute expanded uncertainty : 1.3E-4 A to 1.1E-3 A
Indirect measurement by Ohm's law
Room temperature : 23.0 ºC
Approved on 01 February 2022
Institute service identifier : INM-L03-20
CMC ID : SIM-EM-CO-00000N2J-1
 

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