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Calibration and Measurement Capabilities
Mass and related quantities
In the CMCs uncertainty statements, the notation Q[a, b] stands for the root-sum-square of the terms between brackets: Q[a, b] = [a2 + b2]1/2
 
Result of the search
Your selection : Mass and related quantities, Fluid flow
 
Chinese Taipei, CMS (ITRI Center for Measurement Standards)
Complete CMCs in Mass and related quantities for Chinese Taipei (.PDF file)
Air speed. Anemometers, 0.5 m/s to 25 m/s
Relative expanded uncertainty (k = 2, level of confidence 95 %) in %: 0.52
Primary method (LDA and wind tunnel)
Fluid: air
Pressure: ambient
Temperature: ambient
Measurement uncertainty applicable for probe diameter below 25 mm.
Approved on 28 December 2017
Internal NMI service identifier: CMS/F10
 
Gas flow rate . Gas flow meters, 0.002 L/min to 24 L/min
Relative expanded uncertainty (k = 2, level of confidence 95 %) in %: 0.11
Primary method (Piston provers)
Fluid: dry air, N2, Ar, He, O2
Absolute pressure: below 700 kPa
Temperature: (23 ± 3) °C
Approved on: 28 December 2017
Mass flow rate: (0.04 to 480) mg/s for air with the same uncertainty. For other fluids, the mass flow rate range corresponding to the same volume flow rate range and uncertainty apply. Min. volume flow rate for He with the same uncertainty is 0.04 L/min.
Internal NMI service identifier: CMS/F06
 
Gas flow rate . Gas flow meters, 0.002 L/min to 24 L/min
Relative expanded uncertainty (k = 2, level of confidence 95 %) in %: 0.13
Comparison method (Laminar flowmeters)
Fluid: dry air, N2, Ar, He, O2
Absolute pressure: below 700 kPa
Temperature: (23 ± 3) °C
Approved on: 28 December 2017
Mass flow rate: (0.04 to 480) mg/s for air with the same uncertainty. For other fluids, the mass flow rate range corresponding to the same volume flow rate range and uncertainty apply. Min. volume flow rate for He with the same uncertainty is 0.04 L/min.
Internal NMI service identifier: CMS/F06
 
Gas flow rate . Gas flow meters, 4 L/min to 100 L/min
Relative expanded uncertainty (k = 2, level of confidence 95 %) in %: 0.16
Primary method (Bell prover: 60 L)
Fluid: dry air
Absolute pressure: below 700 kPa
Temperature: (23 ± 3) °C
Mass flow rate: (0.08 to 2) g/s with the same uncertainty.
Approved on 28 December 2017
Internal NMI service identifier: CMS/F07
 
Gas flow rate . Gas flow meters, 20 L/min to 1000 L/min
Relative expanded uncertainty (k = 2, level of confidence 95 %) in %: 0.12
Primary method (Bell prover: 600 L)
Fluid: dry air
Absolute pressure: below 700 kPa
Temperature: (23 ± 3) °C
Mass flow rate: (0.4 to 20) g/s with the same uncertainty.
Approved on 28 December 2017
Internal NMI service identifier: CMS/F08
 
Gas flow rate . Gas flow meters, 6.5 L/min to 100 L/min
Relative expanded uncertainty (k = 2, level of confidence 95 %) in %: 0.18
Comparison method (Sonic nozzles)
Fluid: dry air
Absolute pressure: below 700 kPa
Temperature: (23 ± 3) °C
Mass flow rate: (0.13 to 2) g/s with relative expanded uncertainties of 0.18 %.
Approved on 28 December 2017
Internal NMI service identifier: CMS/F08


 
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