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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)
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
:
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
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
