The Fluid Flow Measurement Standard at National Physical Laboratory, India

摘要

The Fluid Flow Measurement Standard group of NPLI has established Water Meter Testing and Calibration Facilities. Initially, the Water Flow Calibration Facility (WFCF) at NPLI was established in joint collaboration with PTB, Germany during 1992 to 1998 under NPLI-PTB Technical Collaboration Program for calibration of different types of water flow meters (WFM) using static-gravimetric method as per ISO 4185. The facility was operational till 2001 and comprises of two test rigs, namely, DN50 and DN200 for calibration of WFM of different sizes ranging from 10 mm to 200 mm. Both of the Test Rigs were revived during 2008 and 2009. The present paper describes our R&D efforts for the revival of the facility. This revival of the system enables us to maintain the facility. As this 18 years old facility has become obsolete due to technological advancement, we need to improve and maintain our facility compatible to international standards being National Metrology Institute. Therefore, we have planned for the upgradation of our WFCF using state-of-the-art instrumentation and control compatible to international level to maintain the NMI status in water flow area. In the present paper, we describe in details the various features of this facility, its automation and upgradation plans.