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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)
United Arab Emirates, EMI (Emirates Metrology Institute)
Frequency ,
Frequency
:
5 MHz
Frequency counter
Relative expanded uncertainty
:
1.2E-11 Hz/Hz
Direct frequency measurement
Gate time : 5 s
Number of measurements : 100
Approved on 01 October 2020
Institute service identifier : CP-E-09
CMC ID :
GULFMET-TF-AE-00000KXG-4
Mass ,
Mass
:
10 g to 100 g
Mass standard
Absolute expanded uncertainty
:
6 µg to 1.9E1 µg
Comparison in air
Uncertainty scales with measurand level The volume of the mass standards is known
Approved on 31 August 2023
CMC ID :
GULFMET-M-AE-00000OJD-1
AC power ,
AC power and energy: three phase (frequency <= 400 Hz), reactive energy
:
0.12 var h to 5.88E4 var h
Reactive energy meter
Relative expanded uncertainty
:
2.7E2 µvar h (VAh)-1
Comparison with reference standard
Voltage : 30 V to 490 V
Current : 4 mA to 120 A
Phase : 0 to 1, inductive or capacitive;
Frequency : 45 Hz to 65 Hz
Approved on 10 February 2022
Institute service identifier : CP-E-31
CMC ID :
GULFMET-EM-AE-00000LJ4-1
DC voltage (up to 1100 V) ,
DC voltage sources, single values
:
1.018 V to 10 V
Solid state voltage standard
Absolute expanded uncertainty
:
2.6 µV to 7.3 µV
Uncertainty table
{"row_1":{"col_1":"","col_2":"Expanded uncertainty"},"row_2":{"col_1":"1.018 V","col_2":"2.6"},"row_3":{"col_1":"10 V","col_2":"7.3"}}
Direct comparison with reference standard
Approved on 23 February 2022
Institute service identifier : CP-E-03
CMC ID :
GULFMET-EM-AE-00000LIZ-1
AC power ,
AC power and energy: single phase (frequency <= 400 Hz), reactive power
:
0.125 var to 6.00E4 var
Reactive power meter
Relative expanded uncertainty
:
4.0E1 µvar/VA
Comparison with reference standard
Voltage : 1 V to 500 V
Current : 0.125 A to 120 A
Phase : 0 to 1, inductive or capacitive
Frequency : 45 Hz to 65 Hz
Approved on 10 February 2022
Institute service identifier : CP-E-30
CMC ID :
GULFMET-EM-AE-00000NEL-1
AC power ,
AC power and energy: single phase (frequency <= 400 Hz), active power
:
0.125 W to 6.00E4 W
Power meter
Relative expanded uncertainty
:
2.5E1 µW/VA
Comparison with reference standard
Voltage : 1 V to 500 V
Current : 0.125 A to 120 A
Phase : 0 to 1, inductive or capacitive
Frequency : 45 Hz to 65 Hz
Approved on 10 February 2022
Institute service identifier : CP-E-30
CMC ID :
GULFMET-EM-AE-00000NEK-1
Mass ,
Mass
:
0.1 g to 1 g
Mass standard
Absolute expanded uncertainty
:
1.6 µg to 6.6 µg
Comparison in air
Uncertainty scales with measurand level The volume of the mass standards is known
Approved on 31 August 2023
CMC ID :
GULFMET-M-AE-00000OJB-1
Mass ,
Mass
:
1 g to 10 g
Mass standard
Absolute expanded uncertainty
:
4 µg to 6 µg
Comparison in air
Uncertainty scales with measurand level The volume of the mass standards is known
Approved on 17 June 2023
CMC ID :
GULFMET-M-AE-00000OJC-1
DC resistance ,
DC resistance standards and sources: intermediate values
:
10 Ω to 1.00E4 Ω
Standard resistor
Relative expanded uncertainty
:
0.43 µΩ/Ω to 0.57 µΩ/Ω
Uncertainty table
{"row_1":{"col_1":"<br>","col_2":"Relative expanded uncertainty"},"row_2":{"col_1":"10 Ω","col_2":"0.43"},"row_3":{"col_1":"25 Ω","col_2":"0.49"},"row_4":{"col_1":"100 Ω","col_2":"0.49"},"row_5":{"col_1":"1 kΩ","col_2":"0.54"},"row_6":{"col_1":"10 kΩ","col_2":"0.57"}}
DCC bridge
Oil or air bath temperature : 20 °C to 25 °C
Approved on 03 March 2022
Institute service identifier : CP-E-02
CMC ID :
GULFMET-EM-AE-00000LJ0-1
DC resistance ,
DC resistance standards and sources: intermediate values
:
0.1 Ω to 1 Ω
Standard resistor
Relative expanded uncertainty
:
0.43 µΩ/Ω
Uncertainty table
{"row_1":{"col_1":"<br>","col_2":"Relative expanded uncertainty"},"row_2":{"col_1":"0.1 Ω","col_2":"0.43"},"row_3":{"col_1":"1 Ω","col_2":"0.43"}}
DCC bridge
Oil or air bath temperature : 20 °C to 25 °C
Approved on 19 February 2023
Institute service identifier : CP-E-02
CMC ID :
GULFMET-EM-AE-00000NXP-1
Mass ,
Mass
:
1 kg to 10 kg
Mass standard
Absolute expanded uncertainty
:
8.0E-2 mg to 1.6 mg
Comparison in air
Uncertainty scales with measurand level The volume of the mass standards is known
Approved on 17 June 2023
CMC ID :
GULFMET-M-AE-00000OJF-1
AC power ,
AC power and energy: three phase (frequency <= 400 Hz), active energy
:
0.12 Wh to 5.88E4 Wh
Energy meter
Relative expanded uncertainty
:
2.6E2 µWh (VAh)-1
Comparison with reference standard
Voltage : 30 V to 490 V
Current : 4 mA to 120 A
Phase : 0 to 1, inductive or capacitive;
Frequency : 45 Hz to 65 Hz
Approved on 10 February 2022
Institute service identifier : CP-E-31
CMC ID :
GULFMET-EM-AE-00000LJ3-1
Frequency ,
Frequency
:
1 MHz to 350 MHz
General frequency source
Relative expanded uncertainty
:
1.2E-11 Hz/Hz
Direct frequency measurement
Amplitude : > 0.5 Vp-p
Averaging time : 500 s
Approved on 01 October 2020
Institute service identifier : CP-E-01
CMC ID :
GULFMET-TF-AE-00000KXE-11
Frequency ,
Frequency
:
10 MHz
Frequency counter
Relative expanded uncertainty
:
1.2E-11 Hz/Hz
Direct frequency measurement
Gate time : 5 s
Number of measurements : 100
Approved on 01 October 2020
Institute service identifier : CP-E-09
CMC ID :
GULFMET-TF-AE-00000KXH-5
Frequency ,
Frequency
:
1 MHz
Frequency counter
Relative expanded uncertainty
:
1.2E-11 Hz/Hz
Direct frequency measurement
Gate time : 5 s
Number of measurements : 100
Approved on 01 October 2020
Institute service identifier : CP-E-09
CMC ID :
GULFMET-TF-AE-00000KXF-4
Mass ,
Mass
:
0.1 kg to 1 kg
Mass standard
Absolute expanded uncertainty
:
1.8E1 µg to 8.0E1 µg
Comparison in air
Uncertainty scales with measurand level The volume of the mass standards is known
Approved on 17 June 2023
CMC ID :
GULFMET-M-AE-00000OJE-1
