SPRING Singapore

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SPRING Singapore

• Country Report for Fluid Flow Measurement

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Current Measurement Capability of SPRING
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Standards for Gas flow Measurements

• 1. Bell prover
• Measurement Range
• Mass flow rate From 2.00E-05 to 1 g/s
• Volume flow rate 1.70E-2 to 8.30E2cm³/s
• Expanded measurement uncertainty
• ? 0.7 of Rd

• 2. Piston Prover
• Measurement Range
• Mass flow rate From 1 to 3.30E1 g/s
• Volume flow rate From 8.30E-1 to 2.8E1cm³/s
• Expanded measurement uncertainty
• ? 0.7 of Rd

Treaceability of measurements SPRINGs primary
length standard SPRINGs primary pressure
standard SPRINGs primary temperature
standard SPRINGs primary time and frequency
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Peer assessment

• The 1st peer assessment for ISO 17025 on gas flow
  measurements
• Conducted from 31 Jan 05 to 4 Feb 05
• Assessment scope the services of claimed CMC at
  BIMP data base.
• Assessment organization SAC- SINGLAS
• Auditors Dr. Bignell Noel from NMIA
• Jason Tan from SINGLAS

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Comparisons

The following bilateral comparisons had been
conducted at 2004 -2005 SPRING and NMIJ Volume
flow rate Dry Air/Ambient pressure/1.5-3.5
NL/min SPRING and NMIA Mass flow rate Dry
Air/Ambient- negative Pressure/ 2.3-6 g/s SPRING
and ITRI Volume flow rate Nitrogen/Ambient
pressure/0.2-24NL/min
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Article Published

• A report the for uncertainty analysis of bell
  prover gas flow standard has been published at
  ICFM'2004, 135-140, Spt 2004.
• Title ltltThe middle range gas flow standard of
  SPRING Singaporegtgt
• Presented at The 12th international conference
  on flow measurement (IMEKO TC9),

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Future Development

• The primary Microgas flow standard.
• In-house development of gas flow standard
• Two piston provers
• Working range 10E-6 to 10E-10 mol/s
• Uncertainty ?2
• The orifice flow primary vacuum standard
• Working range from 1.3E-4 to 1.3E-7 mbar
• The Micro-liquid flow standard