Results for: Fluid flow, NMIJ, Critical nozzle
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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)
Japan, NMIJ AIST (National Metrology Institute of Japan)
Fluid flow ,
Gas flowrate
:
5.00E-3 g/min to 0.1 g/min
Gas meter
Relative expanded uncertainty
:
7.0E-2 % to 0.19 %
0.0006/Qm + 0.065 Qm mass flowrate in g/min
The uncertainty is expressed in %
Critical nozzle
Fluid : nitrogen, dry air
Pressure : 50 kPa to 650 kPa (abs)
Temperature : ambient
Test line : 4 mm to 13 mm
Volume flowrate: 0.07 cm3/s to 1.40 cm3/s with expanded uncertainty of (0.0085/Qv + 0.065) %, Qv volume flowrate in cm3/s
Approved on 11 April 2019
Institute service identifier : NMIJ/FF-GS-21
CMC ID :
APMP-M-JP-00000F9O-2
Fluid flow ,
Gas flowrate
:
1.7 g/s to 1670 g/s
Gas meter
Relative expanded uncertainty
:
0.28 %
Critical nozzle
Fluid : dry air
Pressure : 100 kPa to 500 kPa (abs)
Temperature : ambient
Test line : 50 mm to 150 mm
Volume flowrate: 5 m3/h to 1000 m3/h with same uncertainty
Approved on 09 January 2014
Institute service identifier : NMIJ/FF-GM-20
CMC ID :
APMP-M-JP-00000F9R-2
Fluid flow ,
Gas flowrate
:
0.1 g/min to 400 g/min
Gas meter
Relative expanded uncertainty
:
7.0E-2 % to 0.51 %
0.0011Qm + 0.07 Qm mass flowrate in g/min
The uncertainty is expressed in %
Critical nozzle
Fluid : nitrogen, dry air
Pressure : 50 kPa to 650 kPa (abs)
Temperature : ambient
Test line : 4 mm to 13 mm
Volume flowrate: 1.40 cm3/s to 2532 cm3/s with expanded uncertainty of (0.00008Qv + 0.07) %, Qv volume flowrate in cm3/s
Approved on 11 April 2019
Institute service identifier : NMIJ/FF-GS-22
CMC ID :
APMP-M-JP-00000F9P-2
