一、前言测定瞬时流量的转子(浮子)式、量热式等气体流量计,需用气体实流来标定流量并校验其准确度。常用的方法是使保持一定压力的气流流过被测仪表,并测定一定时间内流过的气体体积,再经过计算得出流量率。我厂过去采用钟罩法和水排气法来进行这一标定工作,前者设备比较复 First, the foreword Determination of instantaneous flow of rotor (float) type, calorimetric and other gas flow meter, the need to use gas flow to calibrate the flow and verify its accuracy. Commonly used method is to maintain a certain pressure flow through the instrumentation, and determine the volume of gas flowing over a period of time, and then calculated the flow rate. I plant the past bell method and water exhaust method to carry out the calibration work, the former more complex equipment