NIST measurement services: NIST calibration services for gas flow meters. Piston prover and bell prover gas flow facilities

Technical Report · Sat Aug 01 04:00:00 EDT 1998

OSTI ID:676100

Wright, J D; Mattingly, G E

This document provides a description of the small and medium range gas flow calibration facilities at the National Institute of Standards and Technology (NIST) Fluid Flow Group, as reported in NIST Special Publication 250 (1) for Test Nos. 18010C-18040C and 18050S, Flow Rate Measurements. The Fluid Flow Group can perform gas meter calibrations and special tests at flows between 3.7 x 10(-5) m{sup 3}/min and 1.4 m{sup 3}/min (0.001 standard cubic feet per minute (SCFM) and 51 SCFM, reference temperature and pressure are 293.15 K and 101325 Pa) using positive displacement techniques. The flow rate of gas passing through the meter under test is determined from pressure, temperature, volume, and transit time measurements of a displaced volume of gas. Two types of displacement devices are used mercury-sealed piston provers and bell gas meters, or bell provers. This report describes the techniques used for calibrating meters and presents the uncertainty analysis associated with such calibrations.

• Research Organization: National Inst. of Standards and Technology, Process Measurements Div., Gaithersburg, MD (United States)
• OSTI ID: 676100
• Report Number(s): PB--99-107260/XAB; NIST/SP--250-49
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
44 INSTRUMENTATION
INCLUDING NUCLEAR AND PARTICLE DETECTORS
AIR FLOW
CALIBRATION
FLOW RATE
GAS METERS
STANDARDIZATION