The master meter method gas flow standard device adopts four high-precision gas turbine flowmeters produced by Elster GmbH, Germany.These flowmeters serve as standard instruments for the calibration of other flowmeters. The device operates with air as the medium and employs the negative pressure method to achieve the calibration of the flow meters under test.
Design basis
JJG643?2003 Verification regulation of Master Meter Method Flow Standard Device
JJG198?1994 Verification regulation of Velocity Flowmeter
JJG633?2005 Verification Regulation of Gas Volumetric Flowmeter
JJG577 —2005 Verification Regulation of Diaphragm Gas Meter
JJG1029?2007 Verification Regulation of Vortex Flowmeter
JJG1030?2007 Verification Regulation of Ultrasonic Flowmeter
JJG1037?2008 Verification Regulation of Turbine Flowmeter
This Gas Flow Standard Device employs a gas turbine flowmeter as the master meter, allowing gas to pass continuously through both the master meter and the flowmeter under test within the same time interval. Real-time comparison of the flow values output by the two meters is conducted, and after pressure and temperature conversion, the indicated error of the flowmeter under test is determined.
