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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)
Ethiopia, NMIE (National Metrology Institute of Ethiopia)
AC current ,
AC current up to 100 A: meters
:
0.01 A to 20 A
Digital Multi-meter
Absolute expanded uncertainty
:
2.4E-4 A to 4.0E-2 A
Uncertainty table
{"row_1":{"col_1":"<strong>Range of AC Current in A@ 40Hz, 100 Hz, 1000 Hz</strong>","col_2":"<strong contenteditable=\"true\">Expanded Uncertainty @ 40 Hz in A</strong>","col_3":"<strong>Expanded Uncertainty @100 Hz in A</strong><br><br>","col_4":"<strong contenteditable=\"true\">Expanded Uncertainty @ 1000 Hz in A</strong>"},"row_2":{"col_1":"<strong>0.01 to 1 </strong>","col_2":"<strong>0.00024</strong><br>","col_3":"<strong>0.00024</strong>","col_4":"<strong>0.00024</strong>"},"row_3":{"col_1":"<strong>≥1 to 9</strong><br>","col_2":"<strong>0.04</strong>","col_3":"<strong>0.04</strong>","col_4":"<strong>0.04</strong>"},"row_4":{"col_1":"<strong>At 10 </strong><br>","col_2":"<strong>0.0043</strong><br>","col_3":"<strong>0.0043</strong>","col_4":"<strong>0.0043</strong>"},"row_5":{"col_1":"<strong>>10 to 20</strong><br>","col_2":"<strong>0.04</strong><br>","col_3":"<strong>0.04</strong>","col_4":"<strong>0.04</strong>"}}
Direct comparison against characterized multifunction calibrator
FLUKE 792A AC/DC transfer standard with FLUKE A40 Current shunt resistor
Frequency : 40 Hz, 100 Hz and 1000 Hz
Approved on 07 February 2025
CMC ID :
AFRIMETS-EM-ET-00000QDG-1
AC voltage (up to the MHz range) ,
AC voltage meters up to 1000 V: meter
:
0.01 V to 1000 V
Digital Multi-meter
Absolute expanded uncertainty
:
5.0E-4 V to 0.41 V
Uncertainty table
{"row_1":{"col_1":"<strong contenteditable=\"true\">Range of AC Voltage Value/ in V @ 40Hz, 100 Hz, 1000 Hz</strong>","col_2":"<strong>Expanded Uncertainty @ 40 Hz in V</strong><br>","col_3":"<strong>Expanded Uncertainty @ 100 Hz in V</strong><br>","col_4":"<strong contenteditable=\"true\">Expanded Uncertainty @ 1000 Hz in V</strong><br>"},"row_2":{"col_1":"<strong contenteditable=\"true\">0.01 to 0.1</strong>","col_2":"<strong>0.0005</strong>","col_3":"<strong>0.0005</strong><br>","col_4":"<strong contenteditable=\"true\">0.0005</strong><br>"},"row_3":{"col_1":"<strong contenteditable=\"true\">>0.1 to 1</strong><br>","col_2":"<strong>0.0006</strong><br>","col_3":"<strong>0.0006</strong>","col_4":"<strong>0.0006</strong><br>"},"row_4":{"col_1":"<strong>>1 to 100</strong>","col_2":"<strong contenteditable=\"true\">0.032</strong><br>","col_3":"----","col_4":"---<br>"},"row_5":{"col_1":"<strong>>100 to 1000</strong>","col_2":"<strong>0.41</strong><br>","col_3":"<strong>0.41</strong>","col_4":"<strong>0.41</strong><br>"}}
Direct comparison against characterized multifunction calibrator
FLUKE 792A AC/DC transfer Standard
Frequency : 40 Hz, 100 Hz and 1000 Hz
Approved on 07 February 2025
Institute service identifier : ETHIOPIAN METROLOGY INSTITUTE
CMC ID :
AFRIMETS-EM-ET-00000QDF-1
DC voltage (up to 1100 V) ,
DC voltage meters, intermediate values
:
0.01 V to 1000 V
Digital Multi-meter
Absolute expanded uncertainty
:
1.1E-6 V to 1.5E-2 V
Uncertainty table
{"row_1":{"col_1":"DC voltage value / in V<br>","col_2":"Expanded uncertainty / in V<br type=\"_moz\">"},"row_2":{"col_1":"0.01 to 0.1","col_2":"0.0000011"},"row_3":{"col_1":"> 0.1 to 1","col_2":"0.000014"},"row_4":{"col_1":"> 1 to 10","col_2":"0.000094"},"row_5":{"col_1":"> 10 to 100","col_2":"0.0011"},"row_6":{"col_1":"> 100 to 300","col_2":"0.005"},"row_7":{"col_1":"> 300 to 500","col_2":"0.008"},"row_8":{"col_1":"> 500 to 1000<br type=\"_moz\">","col_2":"0.015"}}
Direct comparison with multifunction transfer standard
Approved on 20 December 2024
Institute service identifier : ETHIOPIAN METROLOGY INSTITUTE
CMC ID :
AFRIMETS-EM-ET-00000Q22-1
DC current (up to 100 A) ,
DC current meters: intermediate value
:
0.01 A to 20 A
Digital Multi-meter
Absolute expanded uncertainty
:
6.0E-6 A to 2.2E-2 A
Uncertainty table
{"row_1":{"col_1":"DC current value/ in A<br type=\"_moz\">","col_2":"Expanded uncertainty / in A"},"row_2":{"col_1":"0.01 to 0.33","col_2":"<strong></strong>0.000040<strong></strong><br type=\"_moz\">"},"row_3":{"col_1":"> 0.33 to 3","col_2":"0.00047"},"row_4":{"col_1":"> 3 to 10","col_2":"0.0064"},"row_5":{"col_1":"> 10 to 20","col_2":"0.023"}}
Direct comparison against characterized multifunction calibrator
Approved on 20 December 2024
Institute service identifier : ETHIOPIAN METROLOGY INSTITUTE
CMC ID :
AFRIMETS-EM-ET-00000Q26-1
Items for disseminating ITS-90 and PLTS 2000 ,
Temperature
:
200 °C to 450 °C
Industrial Platinum Resistance Thermometer
Absolute expanded uncertainty
:
0.72 °C
Comparison with Standard Platinum Resistance Thermometer (SPRT)
Fluidized bath, The uncertainty within the range applies to a linear interpolation and represented by the maximum value within the range.
Approved on 21 June 2024
CMC ID :
AFRIMETS-T-ET-00000PT6-1
Items for disseminating ITS-90 and PLTS 2000 ,
Temperature
:
80 °C to 200 °C
Industrial Platinum Resistance Thermometer
Absolute expanded uncertainty
:
0.24 °C
Comparison with Standard Platinum Resistance Thermometer (SPRT)
Oil bath, The uncertainty is evaluated at measurement points and it is the maximum over the range.
Approved on 06 June 2024
CMC ID :
AFRIMETS-T-ET-00000PT5-1
DC resistance ,
DC resistance meter: intermediate values
:
1 Ω to 1.00E9 Ω
Digital multimeter
Absolute expanded uncertainty
:
1.1E-5 MΩ to 0.11 MΩ
Uncertainty table
{"row_1":{"col_1":"Range of Resistance Value","col_2":"Unit","col_3":"Expanded Uncertainty<br>","col_4":"Unit"},"row_2":{"col_1":"0.001 to 100<br>","col_2":"KΩ","col_3":"0.011","col_4":"KΩ<br>"},"row_3":{"col_1":"> 0.1 to 1<br type=\"_moz\">","col_2":"MΩ<br>","col_3":"0.0012","col_4":"MΩ<br>"},"row_4":{"col_1":"> 1 to 100","col_2":"MΩ","col_3":"0.11","col_4":"MΩ"}}
Direct comparison against characterized multifunction calibrator
Approved on 12 December 2024
Institute service identifier : ETHIOPIAN METROLOGY INSTITUTE
CMC ID :
AFRIMETS-EM-ET-00000Q27-1
DC resistance ,
DC resistance
:
1 Ω
1 Ω fixed standard resistor
Relative expanded uncertainty
:
1.3E1 µΩ/Ω
Calibrator and shunt, voltage drop across shunt
Approved on 19 February 2023
CMC ID :
AFRIMETS-EM-ET-00000O3G-1
DC resistance ,
DC resistance
:
10 Ω to 1000 Ω
10 Ω, 100 Ω and 1 kΩ fixed standard resistor
Relative expanded uncertainty
:
1.2E1 µΩ/Ω to 1.4E1 µΩ/Ω
Uncertainty table
{"row_1":{"col_1":"Fixed Value Standard Resistor","col_2":"CMC uncertainty<br>"},"row_2":{"col_1":"10 Ω","col_2":"14 µΩ/Ω<br>"},"row_3":{"col_1":"100 Ω","col_2":"14 µΩ/Ω<br>"},"row_4":{"col_1":"1 kΩ","col_2":"12 µΩ/Ω<br>"}}
Calibrator and shunt, voltage drop across shunt
Approved on 19 February 2023
CMC ID :
AFRIMETS-EM-ET-00000O3H-1
Fluid flow ,
Piston Pipette
:
5 µL to 1000 µL
100 μL
Absolute expanded uncertainty
:
2.6E-2 µL to 3.8 µL
Uncertainty table
{"row_1":{"col_1":"Piston Operated Pipette<br>Nominal volume (μL)","col_2":"Uncertainty (μL)"},"row_2":{"col_1":"5","col_2":"0.026"},"row_3":{"col_1":"10","col_2":"0.04"},"row_4":{"col_1":"20","col_2":"0.08"},"row_5":{"col_1":"50","col_2":"0.19"},"row_6":{"col_1":"100","col_2":"0.38"},"row_7":{"col_1":"200","col_2":"0.76"},"row_8":{"col_1":"500","col_2":"1.9"},"row_9":{"col_1":"1000","col_2":"3.8"}}
Gravimetric
ISO 8655-6
Approved on 03 December 2024
CMC ID :
AFRIMETS-M-ET-00000O3U-1
Items for disseminating ITS-90 and PLTS 2000 ,
Temperature
:
30 °C to 80 °C
Industrial Platinum Resistance Thermometer
Absolute expanded uncertainty
:
6.9E-2 °C
Comparison with Standard Platinum Resistance Thermometer (SPRT)
Water bath, The uncertainty within the range applies to a linear interpolation and represented by the maximum value within the range.
Approved on 21 June 2024
CMC ID :
AFRIMETS-T-ET-00000PT4-1
Items for disseminating ITS-90 and PLTS 2000 ,
Temperature
:
-50 °C to 30 °C
Industrial Platinum Resistance Thermometer
Absolute expanded uncertainty
:
3.8E-2 °C
Comparison with Standard Platinum Resistance Thermometer (SPRT)
Alcohol bath, The uncertainty is evaluated at measurement points and it is the maximum over the range.
Approved on 06 June 2024
CMC ID :
AFRIMETS-T-ET-00000PT3-1
