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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)
Kenya, KEBS (Kenya Bureau of Standards)
| 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 |
Absolute expanded uncertainty in |
| brown rice |
cadmium |
0.2 to 0.5 |
7.0E-2 to 0.12 |
|
|
-
Mechanism for measurement service delivery :
Provision of reference value for client samples
-
Microwave Plasma Atomic Emission Spectrometry used to determine cadmium mass fraction in rice after microwave digestion of the sample
-
Approved on
28 June 2016
-
Institute service identifier : 52-CCQM
-
CMC ID :
AFRIMETS-QM-KE-000000UX-1
| Matrix or material |
Analyte or component |
Dissemination range of measurement capability |
Range of certified values in reference materials |
| Mass fraction in mg/g |
Absolute expanded uncertainty in % |
Mass fraction in |
Absolute expanded uncertainty in |
| aqueous media |
ethanol |
0.2 to 25 |
1.9 to 7.2 |
|
|
-
Mechanism for measurement service delivery :
Reference measurement
-
Approved on
13 June 2013
-
Institute service identifier : IPS-Q11-04-2
-
CMC ID :
AFRIMETS-QM-KE-000000UW-1
Force ,
Force: tension and compression
:
100 kN to 1000 kN
Force measuring device
Relative expanded uncertainty
:
5.0E-2 %
Lever Amplification Force Standard Machine
ISO 376
Measurement according to ISO 376
Approved on 02 February 2022
CMC ID :
AFRIMETS-M-KE-00000MQP-1
Force ,
Force: tension and compression
:
1 kN to 10 kN
Force measuring device
Relative expanded uncertainty
:
5.0E-2 %
Lever Amplification Force Standard Machine
ISO 376
Measurement according to ISO 376
Approved on 02 February 2022
Institute service identifier : KEBS/CMC/18
CMC ID :
AFRIMETS-M-KE-00000MQJ-1
Force ,
Force: tension and compression
:
5 kN to 50 kN
Force measuring device
Relative expanded uncertainty
:
0.1 %
Lever Amplification Force Standard Machine
Measurement according to ISO 376
Approved on 23 July 2021
CMC ID :
AFRIMETS-M-KE-00000MQL-2
DC resistance ,
DC resistance: DC resistance standards and sources: intermediate values
:
1 Ω to 1.00E4 Ω
742A Standard resistors, 4 terminal, air immersion
Relative expanded uncertainty
:
1.5 µΩ/Ω to 2 µΩ/Ω
Uncertainty table
{"row_1":{"col_1":"KEBS -2.1.2","col_2":"<br>"},"row_2":{"col_1":"","col_2":"Relative Uncertainty (µΩ/Ω)"},"row_3":{"col_1":"1 Ω to 10 Ω","col_2":"2"},"row_4":{"col_1":"10 Ω to 100 Ω","col_2":"2"},"row_5":{"col_1":"100 Ω to 1 kΩ","col_2":"1.5"},"row_6":{"col_1":"1 kΩ to 10 kΩ","col_2":"1.5"}}
Guideline 6625A Resistance Bridge(current comparator) and 742A standard resistor
Temperature : 23 ± 2 °C
Relative Humidity : 50 ± 15 %R/H
Atmospheric Pressure : 840 ± 10 hPa
Approved on 04 December 2023
Institute service identifier : KEBS
CMC ID :
AFRIMETS-EM-KE-00000P5R-1
Mass ,
Mass
:
5 g
Mass standard
Absolute expanded uncertainty
:
6 µg
Comparison in air
Approved on 16 May 2024
CMC ID :
AFRIMETS-M-KE-00000PBR-1
Acceleration measuring instrument ,
Frequency response (modulus)
:
0.1 m/s2 to 200 m/s2
Acceleration measuring instrument
Relative expanded uncertainty
:
2.2 %
Comparison to a reference accelerometer
ISO 16063-21
Frequency : > 7.5 kHz to 10 kHz
Approved on 25 September 2018
Institute service identifier : KEBS/A2.6
CMC ID :
AFRIMETS-AUV-KE-00000C4H-2
Acceleration measuring instrument ,
Frequency response (modulus)
:
0.1 m/s2 to 200 m/s2
Acceleration measuring instrument
Relative expanded uncertainty
:
2 %
Comparison to a reference accelerometer
ISO 16063-21
Frequency : > 5 kHz to 7.5 kHz
Approved on 25 September 2018
Institute service identifier : KEBS/A2.6
CMC ID :
AFRIMETS-AUV-KE-00000C4G-2
Acceleration measuring chain / accelerometer ,
Voltage sensitivity (modulus)
Acceleration measuring chain/accelerometer
Relative expanded uncertainty
:
2 %
Comparison to a reference accelerometer
ISO 16063-21
Frequency : > 5 kHz to 7.5 kHz
Approved on 25 September 2018
Institute service identifier : KEBS/A2.6
CMC ID :
AFRIMETS-AUV-KE-00000C4O-2
Acceleration measuring chain / accelerometer ,
Charge sensitivity (modulus)
Acceleration measuring chain /accelerometer
Relative expanded uncertainty
:
1 %
Comparison to a reference accelerometer
ISO 16063-21
Frequency : 10 Hz to 1 kHz
Approved on 30 June 2016
Institute service identifier : KEBS/A2.6
CMC ID :
AFRIMETS-AUV-KE-00000C4I-2
DC voltage (up to 1100 V) ,
DC voltage sources, single values
:
1.018 V to 10 V
DC Voltage Standard
Relative expanded uncertainty
:
0.4 µV/V to 0.8 µV/V
Uncertainty table
{"row_1":{"col_1":"Voltage Value (V)","col_2":"Expanded Uncertainty (µV/V)"},"row_2":{"col_1":"1.018","col_2":"0.8"},"row_3":{"col_1":"10","col_2":"0.4"}}
Direct Comparison with a group of solid state voltage standards
New entry
Approved on 12 April 2021
CMC ID :
AFRIMETS-EM-KE-00000MUX-1
Sound calibrators ,
Sound pressure level
:
90 dB (reference: 20 µPa) to 140 dB (reference: 20 µPa)
Sound calibrator (single frequency 1 kHz)
Absolute expanded uncertainty
:
7.0E-2 dB
Microphone method / Insert voltage technique
IEC 60942:2017
CMC applies to single frequency electro-acoustic sound calibrators and does not extend to pistonphones.
Approved on 29 September 2023
Institute service identifier : A2.3.1
CMC ID :
AFRIMETS-AUV-KE-00000P1E-1
Force ,
Force: tension and compression
:
50 kN to 500 kN
Force measuring device
Relative expanded uncertainty
:
5.0E-2 %
Lever Amplification Force Standard Machine
ISO 376
Approved on 23 July 2021
CMC ID :
AFRIMETS-M-KE-00000MQO-2
Mass ,
Mass
:
500 mg
Mass standard
Absolute expanded uncertainty
:
2 µg
Comparison in air
Approved on 16 May 2024
CMC ID :
AFRIMETS-M-KE-00000PBQ-1
Acceleration measuring instrument ,
Frequency response (modulus)
:
0.1 m/s2 to 200 m/s2
Acceleration measuring instrument
Relative expanded uncertainty
:
1.5 %
Comparison to a reference accelerometer
ISO 16063-21
Frequency : >1 kHz to 5 kHz
Approved on 30 June 2016
Institute service identifier : KEBS/A2.6
CMC ID :
AFRIMETS-AUV-KE-00000C4F-2
Acceleration measuring chain / accelerometer ,
Charge sensitivity (modulus)
Acceleration measuring chain/accelerometer
Relative expanded uncertainty
:
2.2 %
Comparison to a reference accelerometer
ISO 16063-21
Frequency : > 7.5 kHz to 10 kHz
Approved on 25 September 2018
Institute service identifier : KEBS/A2.6
CMC ID :
AFRIMETS-AUV-KE-00000C4L-2
Acceleration measuring chain / accelerometer ,
Voltage sensitivity (modulus)
Acceleration measuring chain/accelerometer
Relative expanded uncertainty
:
2.2 %
Comparison to a reference accelerometer
ISO 16063-21
Frequency : > 7.5 kHz to 10 kHz
Approved on 25 September 2018
Institute service identifier : KEBS/A2.6
CMC ID :
AFRIMETS-AUV-KE-00000C4P-2
Acceleration measuring chain / accelerometer ,
Charge sensitivity (modulus)
Acceleration measuring chain/accelerometer
Relative expanded uncertainty
:
1.5 %
Comparison to a reference accelerometer
ISO 16063-21
Frequency : >1 kHz to 5 kHz
Approved on 30 June 2016
Institute service identifier : KEBS/A2.6
CMC ID :
AFRIMETS-AUV-KE-00000C4J-2
DC voltage (up to 1100 V) ,
DC voltage
:
0.1 V to 1 V
Fluke 5730A Calibrator, Fluke 752A Reference Divider
Relative expanded uncertainty
:
0.8 µV/V
Uncertainty table
{"row_1":{"col_1":"Voltage Value (V)","col_2":"Expanded Relative Uncertainty (µV/V)"},"row_2":{"col_1":"0.1","col_2":"0.8"},"row_3":{"col_1":"1","col_2":"0.8"}}
Voltage ratio
New entry
Approved on 12 April 2021
CMC ID :
AFRIMETS-EM-KE-00000MW2-1
