Intercomparison Tests of NRLM Transfer Standard with the Primary Standards of NIST, BNM-LNE, OFMET and PTB for Small Mass Flow Rates of Nitrogen Gas

Published

January 1, 1998

Author(s)

John D. Wright, Shin-ichi Nakao

Abstract

The NRLM transfer standard was brought to the following national laboratories from April 1996 to June 1998 and compared with their primary standards over the flow range from 0.01 g/min to 100 g/min of nitrogen gas: the National Institute of Standards and Technology (NIST), the Swiss Federal Office of Metrology (OFMET), Bureau National de Metrologie - Laboratoire National D'essais (BNM-LNE) and Physikalisch-Technische Bundesanstalt (PTB). The results generally show agreement within 0.2 percent over the whole flow range tested. A close examination of the data shows that the intercomparison results are better in the flow range between 10 g/min and 0.2 g/min where the scatter of the data is about 0.1 percent. Outside of the 0.2 g/min and 10 g/min range, the data disperses over 0.2 percent.

Citation

Metrologia

Volume

35

Pub Type

Journals

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Keywords

comparison, flow, intercomparison, primary standard, transfer standard

Citation

Wright, J. and Nakao, S. (1998), Intercomparison Tests of NRLM Transfer Standard with the Primary Standards of NIST, BNM-LNE, OFMET and PTB for Small Mass Flow Rates of Nitrogen Gas, Metrologia, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=832061 (Accessed October 16, 2025)