Ultrasonic gas meters have the advantages of wide range,wear resistance,and low pressure loss,and are gradually being promoted and applied in the field of gas metering.The pulsed flow metering performance is one of the important metering properties of ultrasonic gas meters,according to GB/T 39841-2021,a set of ultrasonic gas meter pulsed flow measurement device was developed,which used the critical flow nozzle as the main standard to accurately and stably generate the pulsed flow by using the high-speed reversing valve.The flow range of the device is 0.075-11.5 m3/h,with an expanded uncertainty of Urel=0.28%(k=2),which meets the requirements of the pulsed flow test of the ultrasonic gas meter of G1.6-G16 and the verification and calibration of the ultrasonic gas meter of G1.6-G10.
ultrasonic gas meterpulsed flowmeasuring devicemeasurement uncertainty
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