Procedure for Continuous-Flow Respirator Flowrate Determination,

摘要

The test procedure has been prepared as a guide to a method of determining the volume of air delivered by a continuous-flow supplied-air respirator. The method described has the advantage that the test results can be documented on recorder paper. The respiratory-inlet covering of a supplied-air system is placed in a container with an outlet;the outlet of the container is connected to a pneumotachometer and pressure transducer. Flowrates delivered by the respiratory-inlet covering at specified pressures and air-supply hose lengths are recorded and determined from a graph prepared during pneumotachometer calibration.