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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)
Tunisia, DEF-NAT (Laboratoire de Métrologie de la Direction Générale des Transmissions et de l'Informatique)
DC voltage (up to 1100 V) ,
DC voltage sources : intermediate values
:
10 V to 1000 V
voltage source, multifunction calibrator
Absolute expanded uncertainty
:
5.1E-5 V to 6.8E-3 V
Uncertainty table
{"row_1":{"col_1":"","col_2":"Expanded uncertainty / V"},"row_2":{"col_1":"10 V to 100 V","col_2":"(4.8E-06 <i>U</i> + 1.7E-06)"},"row_3":{"col_1":"100 V to 1000 V","col_2":"(6.8E-06 <i>U</i> + 2.2E-06)"}}
Comparison to a voltage reference via a DC comparator with a resistive divider
Temperature : (23 ± 1)°C
Approved on 22 November 2016
Institute service identifier : DEF-NAT 1.1.3
CMC ID :
AFRIMETS-EM-TN-00000871-1
Time interval ,
Time interval
:
1.00E-8 s to 1.00E-3 s
Rise/fall time meter
Absolute expanded uncertainty
Uncertainty table
{"row_1":{"col_1":"","col_2":"Absolute expanded uncertainty expressed in s"},"row_2":{"col_1":"1.00E-08 s","col_2":"2.7E-09"},"row_3":{"col_1":"1.00E-07 s","col_2":"9.0E-09"},"row_4":{"col_1":"1.00E-06 s","col_2":"7.2E-08"},"row_5":{"col_1":"1.00E-05 s","col_2":"7.0E-07"},"row_6":{"col_1":"1.00E-04 s","col_2":"7.0E-06"},"row_7":{"col_1":"1.00E-03 s","col_2":"7.0E-05"}}
7E-02t + 2E-09 t rise/fall time in s, values range from 2.7E-09 s to 7E-05 s
The uncertainty is expressed in s
Time interval measurement
Amplitude : >= 1 V in 50 ohms
Slew rate : > 1 V/ns Number of measurements : 10
Approved on 27 March 2017
Institute service identifier : DEF-NAT 3.4.1
CMC ID :
AFRIMETS-TF-TN-000008LU-1
Radio frequency measurements ,
Reflection coefficient (Sii) in coaxials (values in linear terms: magnitude)
:
2.00E-3 to 0.5
Passive devices
Absolute expanded uncertainty
:
6.2E-4 to 3.3E-2
Uncertainty table
{"row_1":{"col_1":"Γ<sub>x</sub><br>","col_2":"0.4 Ghz to 1 Ghz","col_3":"1 Ghz to 12.4 Ghz<br>"},"row_2":{"col_1":"0.5","col_2":"0.0330","col_3":"0.0330"},"row_3":{"col_1":"0.3","col_2":"0.02","col_3":"0.02"},"row_4":{"col_1":"0.2","col_2":"0.0130","col_3":"0.0140"},"row_5":{"col_1":"0.1","col_2":"0.0065","col_3":"0.0068"},"row_6":{"col_1":"0.05","col_2":"0.0033","col_3":"0.0039"},"row_7":{"col_1":"0.03","col_2":"0.0021","col_3":"0.0029"},"row_8":{"col_1":"0.02<br>","col_2":"0.0015<br>","col_3":"0.0025"},"row_9":{"col_1":"0.01<br>","col_2":"0.0009<br>","col_3":"0.0022"},"row_10":{"col_1":"0.005","col_2":"0.0007<br>","col_3":"0.0021"},"row_11":{"col_1":"0.03","col_2":"0.00064","col_3":"0.0021"},"row_12":{"col_1":"0.002<br>","col_2":"0.00062","col_3":"0.0021"},"row_13":{"col_1":"","col_2":"","col_3":""}}
reflectometer compensate
VM3
Approved on 15 June 2021
Institute service identifier : DEFNAT 11.2.1.a
CMC ID :
AFRIMETS-EM-TN-00000LJF-1
Frequency ,
Frequency
:
15 GHz to 20 GHz
Frequency counter
Absolute expanded uncertainty
:
3 Hz to 4 Hz
Uncertainty table
{"row_1":{"col_1":"","col_2":"Absolute expanded uncertainty expressed in Hz"},"row_2":{"col_1":"0.01 Hz","col_2":"3.1E-07"},"row_3":{"col_1":"0.1 Hz","col_2":"3.1E-06"},"row_4":{"col_1":"1 Hz","col_2":"3.1E-06"},"row_5":{"col_1":"10 Hz","col_2":"3.1E-06"},"row_6":{"col_1":"100 Hz","col_2":"3.1E-06"},"row_7":{"col_1":"1000 Hz","col_2":"3.1E-06"},"row_8":{"col_1":"1E+04 Hz","col_2":"3.1E-06"},"row_9":{"col_1":"1E+05 Hz","col_2":"3.1E-06"},"row_10":{"col_1":"1E+06 Hz","col_2":"3.1E-06"},"row_11":{"col_1":"1E+07 Hz","col_2":"3.1E-05"},"row_12":{"col_1":"1E+08 Hz","col_2":"3.1E-04"},"row_13":{"col_1":"1E+09 Hz","col_2":"3.1E-03"},"row_14":{"col_1":"1E+10 Hz","col_2":"3.1E-02"},"row_15":{"col_1":"1.5E+10 Hz","col_2":"4.7E-02"},"row_16":{"col_1":"1.5E+10 Hz","col_2":"3"},"row_17":{"col_1":"1.6E+10 Hz","col_2":"3"},"row_18":{"col_1":"1.7E+10 Hz","col_2":"3"},"row_19":{"col_1":"1.8E+10 Hz","col_2":"4"},"row_20":{"col_1":"1.9E+10 Hz","col_2":"4"},"row_21":{"col_1":"2.0E+10 Hz","col_2":"4"}}
Direct frequency mesurement
Averaging time : 1 s
Number of measurements : 30
Amplitude : >= 0 dBm in 50 ohms
Approved on 27 March 2017
Institute service identifier : DEF-NAT 2.3.1
CMC ID :
AFRIMETS-TF-TN-000008LT-1
Radio frequency measurements ,
RF attenuation, in coaxials (values in dB)
:
0 dB to 80 dB
passive device (piston attenuator)
Absolute expanded uncertainty
:
2.6E-2 dB to 0.2 dB
Uncertainty table
{"row_1":{"col_1":"Attenuation A<sub>x <strong>(*)</strong></sub><br>","col_2":"Expanded uncertainty (dB)"},"row_2":{"col_1":"0<br>","col_2":"0.026"},"row_3":{"col_1":"1","col_2":"0.028"},"row_4":{"col_1":"2","col_2":"0.028"},"row_5":{"col_1":"3","col_2":"0.028"},"row_6":{"col_1":"4","col_2":"0.028"},"row_7":{"col_1":"5","col_2":"0.028"},"row_8":{"col_1":"6","col_2":"0.029"},"row_9":{"col_1":"7","col_2":"0.029"},"row_10":{"col_1":"8","col_2":"0.029<br>"},"row_11":{"col_1":"9","col_2":"0.029"},"row_12":{"col_1":"10","col_2":"0.029"},"row_13":{"col_1":"15","col_2":"0.030"},"row_14":{"col_1":"20","col_2":"0.032"},"row_15":{"col_1":"25","col_2":"0.035<br>"},"row_16":{"col_1":"30<br>","col_2":"0.037"},"row_17":{"col_1":"35<br>","col_2":"0.039"},"row_18":{"col_1":"40<br>","col_2":"0.042"},"row_19":{"col_1":"45","col_2":"0.045"},"row_20":{"col_1":"50","col_2":"0.18"},"row_21":{"col_1":"55","col_2":"0.18"},"row_22":{"col_1":"60<br>","col_2":"0.19"},"row_23":{"col_1":"65<br>","col_2":"0.19"},"row_24":{"col_1":"70","col_2":"0.19"},"row_25":{"col_1":"75","col_2":"0.19"},"row_26":{"col_1":"80","col_2":"0.20"}}
Direct method
VM3 (evanescent wave attenuator)
Approved on 15 June 2021
Institute service identifier : DEFNAT 11.2.3.c
CMC ID :
AFRIMETS-EM-TN-00000LJR-1
Radio frequency measurements ,
Scalar RF attenuation: in waveguide, magnitude
:
0 dB to 80 dB
passive devices(rotary vane attenuator)
Absolute expanded uncertainty
:
7.5E-2 dB to 0.28 dB
Uncertainty table
{"row_1":{"col_1":"Frequency(GHz)<br>","col_2":"measurement range (dB)<br>","col_3":"Expanded uncertainty (dB)<br>"},"row_2":{"col_1":"8.2-12.4 GHz","col_2":"[0-10]","col_3":"0.075"},"row_3":{"col_1":"8.2-12.4 GHz<br>","col_2":"[0-15]","col_3":"0.076"},"row_4":{"col_1":"8.2-12.4 GHz<br>","col_2":"[0-20]","col_3":"0.077"},"row_5":{"col_1":"8.2-12.4 GHz<br>","col_2":"[0-35]<br>","col_3":"0.078"},"row_6":{"col_1":"8.2-12.4 GHz<br>","col_2":"[0-40]<br>","col_3":"0.08<br>"},"row_7":{"col_1":"8.2-12.4 GHz<br>","col_2":"[0-45]<br>","col_3":"0.082"},"row_8":{"col_1":"8.2-12.4 GHz<br>","col_2":"[0-50]<br>","col_3":"0.22<br>"},"row_9":{"col_1":"8.2-12.4 GHz<br>","col_2":"[0-55]","col_3":"0.22"},"row_10":{"col_1":"8.2-12.4 GHz<br>","col_2":"[0-60]","col_3":"0.22<br>"},"row_11":{"col_1":"8.2-12.4 GHz<br>","col_2":"[0-65]","col_3":"0.22"},"row_12":{"col_1":"8.2-12.4 GHz<br>","col_2":"[0-70]","col_3":"0.22"},"row_13":{"col_1":"8.2-12.4 GHz<br>","col_2":"[0-75]","col_3":"0.22"},"row_14":{"col_1":"8.2-12.4 GHz","col_2":"[0-80]","col_3":"0.28"},"row_15":{"col_1":"","col_2":"","col_3":""},"row_16":{"col_1":"","col_2":"","col_3":""}}
subtitution at 30 MHz
VM3 (evanescent wave attenuator)
Approved on 15 June 2021
Institute service identifier : DEFNAT 11.2.4
CMC ID :
AFRIMETS-EM-TN-00000LJS-1
Frequency ,
Frequency
:
1.00E7 Hz to 1.50E10 Hz
Frequency counter
Absolute expanded uncertainty
:
3.1E-5 Hz to 4.7E-2 Hz
Uncertainty table
{"row_1":{"col_1":"","col_2":"Absolute expanded uncertainty expressed in Hz"},"row_2":{"col_1":"0.01 Hz","col_2":"3.1E-07"},"row_3":{"col_1":"0.1 Hz","col_2":"3.1E-06"},"row_4":{"col_1":"1 Hz","col_2":"3.1E-06"},"row_5":{"col_1":"10 Hz","col_2":"3.1E-06"},"row_6":{"col_1":"100 Hz","col_2":"3.1E-06"},"row_7":{"col_1":"1000 Hz","col_2":"3.1E-06"},"row_8":{"col_1":"1E+04 Hz","col_2":"3.1E-06"},"row_9":{"col_1":"1E+05 Hz","col_2":"3.1E-06"},"row_10":{"col_1":"1E+06 Hz","col_2":"3.1E-06"},"row_11":{"col_1":"1E+07 Hz","col_2":"3.1E-05"},"row_12":{"col_1":"1E+08 Hz","col_2":"3.1E-04"},"row_13":{"col_1":"1E+09 Hz","col_2":"3.1E-03"},"row_14":{"col_1":"1E+10 Hz","col_2":"3.1E-02"},"row_15":{"col_1":"1.5E+10 Hz","col_2":"4.7E-02"},"row_16":{"col_1":"1.5E+10 Hz","col_2":"3"},"row_17":{"col_1":"1.6E+10 Hz","col_2":"3"},"row_18":{"col_1":"1.7E+10 Hz","col_2":"3"},"row_19":{"col_1":"1.8E+10 Hz","col_2":"4"},"row_20":{"col_1":"1.9E+10 Hz","col_2":"4"},"row_21":{"col_1":"2.0E+10 Hz","col_2":"4"}}
Direct frequency mesurement
Averaging time : 100 s
Number of measurements : 30
Amplitude : >= 0 dBm in 50 ohms
Approved on 27 March 2017
Institute service identifier : DEF-NAT 2.3.1
CMC ID :
AFRIMETS-TF-TN-000008LS-1
Time interval ,
Time interval
:
1.00E-9 s to 1.00E5 s
Time difference meter
Absolute expanded uncertainty
Uncertainty table
{"row_1":{"col_1":"","col_2":"Absolute expanded uncertainty expressed in s"},"row_2":{"col_1":"1.00E-09 s","col_2":"2.00E-09"},"row_3":{"col_1":"1.00E-08 s","col_2":"2.00E-09"},"row_4":{"col_1":"1.00E-07 s","col_2":"2.00E-09"},"row_5":{"col_1":"1.00E-06 s","col_2":"2.00E-09"},"row_6":{"col_1":"1.00E-05 s","col_2":"2.00E-09"},"row_7":{"col_1":"1.00E-04 s","col_2":"2.00E-09"},"row_8":{"col_1":"1.00E-03 s","col_2":"2.00E-09"},"row_9":{"col_1":"1.00E-02 s","col_2":"2.00E-09"},"row_10":{"col_1":"1.00E-01 s","col_2":"2.00E-09"},"row_11":{"col_1":"1 s","col_2":"2.02E-09"},"row_12":{"col_1":"10 s","col_2":"2.20E-09"},"row_13":{"col_1":"100 s","col_2":"4.00E-09"},"row_14":{"col_1":"1000 s","col_2":"2.20E-08"},"row_15":{"col_1":"10000 s","col_2":"2.02E-07"},"row_16":{"col_1":"100000 s","col_2":"2.00E-06"}}
2E-11t + 2E-09 t time interval in s, values range from 2E-09 s to 2E-06 s
The uncertainty is expressed in s
Time interval measurement
Amplitude : >= 1 V in 50 ohms
Slew rate : > 1 V/ns Number of measurements : 10
Approved on 27 March 2017
Institute service identifier : DEF-NAT 3.4.3
CMC ID :
AFRIMETS-TF-TN-000008LW-1
Time interval ,
Time interval
:
1.00E-8 s to 1000 s
Pulse width meter
Absolute expanded uncertainty
Uncertainty table
{"row_1":{"col_1":"","col_2":"Absolute expanded uncertainty expressed in s"},"row_2":{"col_1":"1.00E-08 s","col_2":"2.00E-09"},"row_3":{"col_1":"1.00E-07 s","col_2":"2.00E-09"},"row_4":{"col_1":"1.00E-06 s","col_2":"2.00E-09"},"row_5":{"col_1":"1.00E-05 s","col_2":"2.00E-09"},"row_6":{"col_1":"1.00E-04 s","col_2":"2.00E-09"},"row_7":{"col_1":"1.00E-03 s","col_2":"2.00E-09"},"row_8":{"col_1":"1.00E-02 s","col_2":"2.00E-09"},"row_9":{"col_1":"1.00E-01 s","col_2":"2.00E-09"},"row_10":{"col_1":"1 s","col_2":"2.02E-09"},"row_11":{"col_1":"10 s","col_2":"2.20E-09"},"row_12":{"col_1":"100 s","col_2":"4.00E-09"},"row_13":{"col_1":"1000 s","col_2":"2.20E-08"}}
2E-11t + 2E-09 t pulse width in s, values range from 2E-09 s to 2.2E-08 s
The uncertainty is expressed in s
Time interval measurement
Amplitude : >= 1 V in 50 hms
Slew rate : > 1 V/ns Number of measurements : 10
Approved on 27 March 2017
Institute service identifier : DEF-NAT 3.4.2
CMC ID :
AFRIMETS-TF-TN-000008LV-1
Radio frequency measurements ,
Scalar RF attenuation in coaxial line
:
0 dB to 90 dB
Passive devices(variable attenuator)
Absolute expanded uncertainty
:
6.0E-2 dB to 0.38 dB
Uncertainty table
{"row_1":{"col_1":"Frequency (GHz)<br>","col_2":"Measured range (dB)","col_3":"Expanded uncertainty (dB)<br>"},"row_2":{"col_1":"0.01-12.4 GHz<br>","col_2":"[0-10 dB]","col_3":"(0.06+0.58<em> Γx</em>)"},"row_3":{"col_1":"0.01-12.4 GHz","col_2":"[0-20 dB]","col_3":"(0.06+0.57 <em>Γx</em>)"},"row_4":{"col_1":"0.01-12.4 GHz","col_2":"[0-30 dB]","col_3":"(0.06+0.57 <em>Γx</em>)<br>"},"row_5":{"col_1":"0.01-12.4 GHz","col_2":"[0-40 dB]","col_3":"(0.06+0.56 <em>Γx</em>)"},"row_6":{"col_1":"0.01-12.4 GHz","col_2":"[0-50 dB]<br>","col_3":"[0.29+0.25 <em>Γx</em>]"},"row_7":{"col_1":"0.01-12.4 GHz<br>","col_2":"[0-60 dB]<br>","col_3":"[0.29+0.25 <em>Γx</em>]<br>"},"row_8":{"col_1":"0.01-12.4 GHz","col_2":"[0-70 dB]<br>","col_3":"[0.29+0.25 <em>Γx</em>]"},"row_9":{"col_1":"0.01-12.4 GHz","col_2":"[0-80 dB]","col_3":"[0.34+0.22 <em>Γx</em>]"},"row_10":{"col_1":"0.01-12.4 GHz<br>","col_2":"[0-90 dB]","col_3":"[0.34+0.22 <em>Γx</em>]"}}
subtitution at 30MHz
VM3
Approved on 15 June 2021
Institute service identifier : DEFNAT 11.2.3.b
CMC ID :
AFRIMETS-EM-TN-00000LJN-1
Radio frequency measurements ,
Reflection coefficient
:
1.00E-3 to 0.5
Passive devices
Absolute expanded uncertainty
:
6.1E-3 to 1.9E-2
Uncertainty table
{"row_1":{"col_1":"Γ<sub>x</sub>","col_2":"Expanded uncertainty"},"row_2":{"col_1":"0.5","col_2":"1.9E-2"},"row_3":{"col_1":"0.3","col_2":"1.3E-2"},"row_4":{"col_1":"0.2","col_2":"1.1E-2"},"row_5":{"col_1":"0.1","col_2":"9E-3"},"row_6":{"col_1":"0.05<br>","col_2":"6.7E-3"},"row_7":{"col_1":"0.03<br>","col_2":"6.4E-3"},"row_8":{"col_1":"0.02<br>","col_2":"6.2E-3"},"row_9":{"col_1":"0.01<br>","col_2":"6.1E-3"},"row_10":{"col_1":"0.005<br>","col_2":"6.1E-3"},"row_11":{"col_1":"0.003<br>","col_2":"6.1E-3"},"row_12":{"col_1":"0.002<br>","col_2":"6.1E-1"},"row_13":{"col_1":"0.001<br>","col_2":"6.1E-3"}}
Spectrum analyser
VM3
Approved on 15 June 2021
Institute service identifier : DEFNAT 11.2.1.b
CMC ID :
AFRIMETS-EM-TN-00000LSX-1
DC resistance ,
DC resistance sources: low values
:
0.1 Ω to 1 Ω
Fixed resistor & resistance box
Relative expanded uncertainty
:
3 µΩ/Ω to 3.3 µΩ/Ω
Uncertainty table
{"row_1":{"col_1":"0.1Ω<br>","col_2":"3.3"},"row_2":{"col_1":"1Ω","col_2":"3.0"},"row_3":{"col_1":"0.1 Ω to 1 Ω","col_2":"3.3<br>"}}
comparison to reference resistance with DC resistance bridge
standard resistance LN4210
Approved on 02 May 2023
Institute service identifier : Def-Nat 2.1.1
CMC ID :
AFRIMETS-EM-TN-00000O01-1
DC resistance ,
DC Resistance (Intermediate values from 1 ohm up to 10 ohm)
:
1 Ω to 10 Ω
Fixed resistor & resistance box
Relative expanded uncertainty
:
3 µΩ/Ω to 3.8 µΩ/Ω
Uncertainty table
{"row_1":{"col_1":"1 Ω<br>","col_2":"3.0"},"row_2":{"col_1":"10 Ω","col_2":"3.8"},"row_3":{"col_1":"1 Ω to 10 Ω","col_2":"3.8"}}
comparison to reference resistance with DC resistance bridge
LN 4210 (1 Ohm)
Approved on 19 February 2023
Institute service identifier : Def-Nat 2.1.2
CMC ID :
AFRIMETS-EM-TN-00000O0W-1
DC voltage (up to 1100 V) ,
DC voltage sources: low value ranges
:
1.00E-5 V to 10 V
voltage source, multifunction calibrator
Absolute expanded uncertainty
:
1.7E-6 V to 3.8E-5 V
Uncertainty table
{"row_1":{"col_1":"","col_2":"Expanded uncertainty / V"},"row_2":{"col_1":"0.01 mV to 200 mV","col_2":"(1.2E-06 <i>U</i> +1.7E-06)"},"row_3":{"col_1":"0.2 V to 2 V","col_2":"(1.2E-06 <i>U</i> + 1.8E-06)"},"row_4":{"col_1":"2 V to 10 V","col_2":"(3.6E-06 <i>U</i> + 1.7E-06)"}}
Comparison to a voltage reference via a DC comparator with a resistive divider
Temperature : (23 ± 1)°C
Approved on 22 November 2016
Institute service identifier : DEF-NAT 1.1.2
CMC ID :
AFRIMETS-EM-TN-00000870-1
Frequency ,
Frequency
:
0.01 Hz to 1.00E7 Hz
Frequency counter
Absolute expanded uncertainty
:
3.1E-7 Hz to 3.1E-5 Hz
Uncertainty table
{"row_1":{"col_1":"","col_2":"Absolute expanded uncertainty expressed in Hz"},"row_2":{"col_1":"0.01 Hz","col_2":"3.1E-07"},"row_3":{"col_1":"0.1 Hz","col_2":"3.1E-06"},"row_4":{"col_1":"1 Hz","col_2":"3.1E-06"},"row_5":{"col_1":"10 Hz","col_2":"3.1E-06"},"row_6":{"col_1":"100 Hz","col_2":"3.1E-06"},"row_7":{"col_1":"1000 Hz","col_2":"3.1E-06"},"row_8":{"col_1":"1E+04 Hz","col_2":"3.1E-06"},"row_9":{"col_1":"1E+05 Hz","col_2":"3.1E-06"},"row_10":{"col_1":"1E+06 Hz","col_2":"3.1E-06"},"row_11":{"col_1":"1E+07 Hz","col_2":"3.1E-05"},"row_12":{"col_1":"1E+08 Hz","col_2":"3.1E-04"},"row_13":{"col_1":"1E+09 Hz","col_2":"3.1E-03"},"row_14":{"col_1":"1E+10 Hz","col_2":"3.1E-02"},"row_15":{"col_1":"1.5E+10 Hz","col_2":"4.7E-02"},"row_16":{"col_1":"1.5E+10 Hz","col_2":"3"},"row_17":{"col_1":"1.6E+10 Hz","col_2":"3"},"row_18":{"col_1":"1.7E+10 Hz","col_2":"3"},"row_19":{"col_1":"1.8E+10 Hz","col_2":"4"},"row_20":{"col_1":"1.9E+10 Hz","col_2":"4"},"row_21":{"col_1":"2.0E+10 Hz","col_2":"4"}}
Direct frequency mesurement
Averaging time : 100 s
Number of measurements : 30
Amplitude : >= 1 Vrms in 50 ohms
Approved on 27 March 2017
Institute service identifier : DEF-NAT 2.3.1
CMC ID :
AFRIMETS-TF-TN-000008LR-1
Radio frequency measurements ,
RF attenuation, in coaxials (values in dB)
:
0 dB to 90 dB
passive devices: fixed attenuator
Absolute expanded uncertainty
:
7.0E-2 dB to 0.32 dB
Uncertainty table
{"row_1":{"col_1":"frequency (GHz)<br>","col_2":"measurement range(dB)<br>\nrange:[0-90dB]","col_3":"expanded uncertainty(dB)"},"row_2":{"col_1":"[0.01-12.4 GHz]<br>","col_2":"0","col_3":"(0.07+0.29 <em>Γx</em>)"},"row_3":{"col_1":"[0.01-12.4 GHz]<br>","col_2":"3","col_3":"(0.07+0.30<em contenteditable=\"true\"> Γx</em>)"},"row_4":{"col_1":"[0.01-12.4 GHz]<br>","col_2":"6","col_3":"(0.07+0.29 <em>Γx)</em>"},"row_5":{"col_1":"[0.01-12.4 GHz]<br>","col_2":"10","col_3":"(0.07+0.29 <em>Γx</em>)"},"row_6":{"col_1":"[0.01-12.4 GHz]<br>","col_2":"20","col_3":"(0.07+0.29 <em>Γx</em>)"},"row_7":{"col_1":"[0.01-12.4 GHz]<br>","col_2":"30","col_3":"(0.07+0.29 <em>Γx</em>)"},"row_8":{"col_1":"[0.01-12.4 GHz]","col_2":"40","col_3":"(0.07+0.28 <em contenteditable=\"true\">Γx</em>)<br>"},"row_9":{"col_1":"[0.01-12.4 GHz]<br>","col_2":"50","col_3":"(0.23+0.12 <em>Γx</em>)"},"row_10":{"col_1":"[0.01-12.4 GHz]<br>","col_2":"60","col_3":"(0.23+0.12<em> Γx</em>)"},"row_11":{"col_1":"[0.01-12.4 GHz]<br>","col_2":"70","col_3":"(0.23+0.12 <em>Γx</em>)<br>"},"row_12":{"col_1":"[0.01-12.4 GHz]","col_2":"80","col_3":"(0.24+0.35 <em>Γx</em>)"},"row_13":{"col_1":"[0.01-12.4 GHz]","col_2":"90","col_3":"(0.25+0.35 <em>Γx</em>)"}}
(0.07+0.29ΓX) to (0.25+0.35Γx) the expanded uncertainties given are expressed in dB
Γx<=0.2
subtitution at 30 MHz
VM3 (evanescent wave attenuator)
Approved on 15 June 2021
Institute service identifier : DEFNAT 11.2.3.a
CMC ID :
AFRIMETS-EM-TN-00000LJM-1
Radio frequency measurements ,
Reflection coefficient: in waveguide magnitude
:
1.00E-3 to 0.5
Passive devices
Absolute expanded uncertainty
:
1.1E-3 to 3.4E-2
Uncertainty table
{"row_1":{"col_1":"Γ<sub>x</sub>","col_2":"8.2 GHz to 12.4 GHz"},"row_2":{"col_1":"0.5","col_2":"0.034"},"row_3":{"col_1":"0.3","col_2":"0.021"},"row_4":{"col_1":"0.2<br>","col_2":"0.014"},"row_5":{"col_1":"0.1","col_2":"0.007"},"row_6":{"col_1":"0.05<br>","col_2":"0.0036<br>"},"row_7":{"col_1":"0.03","col_2":"0.0023"},"row_8":{"col_1":"0.02<br>","col_2":"0.0017"},"row_9":{"col_1":"0.01<br>","col_2":"0.0013"},"row_10":{"col_1":"0.005<br>","col_2":"0.0011<br>"},"row_11":{"col_1":"0.003","col_2":"0.0011"},"row_12":{"col_1":"0.002<br>","col_2":"0.0011"},"row_13":{"col_1":"0.001<br>","col_2":"0.0011"}}
reflectometer compensate
VM3(evanescent wave attenuator)
Approved on 15 June 2021
Institute service identifier : DEFNAT 11.2.2
CMC ID :
AFRIMETS-EM-TN-00000LJL-1
DC voltage (up to 1100 V) ,
DC voltage meters: intermediate values
:
1.00E-3 V to 1000 V
DC voltmeter, multimeter, multifunction transfer standard
Absolute expanded uncertainty
:
1.7E-6 V to 6.8E-3 V
Uncertainty table
{"row_1":{"col_1":"","col_2":"Expanded uncertainty / V"},"row_2":{"col_1":"1 mV to 200 mV","col_2":"(1.2E-06 <i>U</i>+ 1.7E-06)"},"row_3":{"col_1":"0.2 V to 2 V","col_2":"(1.2E-06 <i>U</i> + 1.8E-06)"},"row_4":{"col_1":"2 V to 10 V","col_2":"(3.6E-06 <i>U</i> + 1.7E-06)"},"row_5":{"col_1":"10 V to 100 V","col_2":"(4.8E-06 <i>U</i> + 1.7E-06)"},"row_6":{"col_1":"100 V to 1000 V","col_2":"(6.8E-06 <i>U</i> + 2.2E-06)"}}
Direct measurement via a standard source
Temperature : (23 ± 1)°C
Approved on 22 November 2016
Institute service identifier : DEF-NAT 1.2.2
CMC ID :
AFRIMETS-EM-TN-00000872-1
DC voltage (up to 1100 V) ,
DC voltage sources: single values
:
1 V to 10 V
Standard cell, solid state voltage standard
Absolute expanded uncertainty
:
0.1 µV to 0.5 µV
Uncertainty table
{"row_1":{"col_1":"","col_2":"Expanded uncertainty / µV"},"row_2":{"col_1":"1 V","col_2":"0.1"},"row_3":{"col_1":"1.018 V","col_2":"0.1"},"row_4":{"col_1":"10 V","col_2":"0.5"}}
Direct comparison with JAVS, Differential method
Temperature : (23 ± 1)°C
Approved on 22 November 2016
Institute service identifier : DEF-NAT 1.1.1
CMC ID :
AFRIMETS-EM-TN-0000086Z-1
Frequency ,
Frequency
:
1.00E7 Hz to 1.50E10 Hz
General frequency source
Absolute expanded uncertainty
:
3.1E-5 Hz to 4.7E-2 Hz
Uncertainty table
{"row_1":{"col_1":"","col_2":"Absolute expanded uncertainty expressed in Hz"},"row_2":{"col_1":"0.01 Hz","col_2":"3.1E-07"},"row_3":{"col_1":"0.1 Hz","col_2":"3.1E-06"},"row_4":{"col_1":"1 Hz","col_2":"3.1E-06"},"row_5":{"col_1":"10 Hz","col_2":"3.1E-06"},"row_6":{"col_1":"100 Hz","col_2":"3.1E-06"},"row_7":{"col_1":"1000 Hz","col_2":"3.1E-06"},"row_8":{"col_1":"1E+04 Hz","col_2":"3.1E-06"},"row_9":{"col_1":"1E+05 Hz","col_2":"3.1E-06"},"row_10":{"col_1":"1E+06 Hz","col_2":"3.1E-06"},"row_11":{"col_1":"1E+07 Hz","col_2":"3.1E-05"},"row_12":{"col_1":"1E+08 Hz","col_2":"3.1E-04"},"row_13":{"col_1":"1E+09 Hz","col_2":"3.1E-03"},"row_14":{"col_1":"1E+10 Hz","col_2":"3.1E-02"},"row_15":{"col_1":"1.5E+10 Hz","col_2":"4.7E-02"},"row_16":{"col_1":"1.5E+10 Hz","col_2":"3"},"row_17":{"col_1":"1.6E+10 Hz","col_2":"3"},"row_18":{"col_1":"1.7E+10 Hz","col_2":"3"},"row_19":{"col_1":"1.8E+10 Hz","col_2":"4"},"row_20":{"col_1":"1.9E+10 Hz","col_2":"4"},"row_21":{"col_1":"2.0E+10 Hz","col_2":"4"}}
Direct frequency mesurement
Averaging time : 100 s
Number of measurements : 30
Amplitude : >= 0 dBm in 50 ohms
Approved on 27 March 2017
Institute service identifier : DEF-NAT 2.2.1.a
CMC ID :
AFRIMETS-TF-TN-000008LP-1
the expanded uncertainties given are dimensionless
measured temperature :(23±1)C°
measured relative humidity :Between 30% and 50%