The on the spot inspection of natural gas orifice meter is adopting the transitivity calibration method taking Venturi nozzle as calibrationscale.
天然气孔板流量计的现场检定，采用以文丘里音速喷嘴作为标准表的传递型校准法。
2
Time scalecalibration concise, so that when read at a glance.
时间刻度校准简洁，这样，当看一眼。
3
The paper introduces the component, working principle, automatic calibration and it's application in the aluminium smelter of proportioning belt scale controlled by PLC.