1 Scope and field of application<br>2 Concept<br>3 Nomenclature, symbols, units<br>4 Setup of standardized test airways<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;4.1 Inlet side chamber type test airway<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;4.2 Outlet side chamber type test airway<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;4.3 Design of test airways<br>5 Design and dimensions of test airway components<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;5.1 Volume flow rate measuring devices (flowmeters)<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;5.2 iate ducts<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;5.3 Flow control devices<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;5.4 Auxiliary fan<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;5.5 Test chamber<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;5.6 Fan with pressure side equalizing length<br>6 Measuring methods and measuring instruments<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;6.1 Measurement of variable quantities<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;6.2 Pressure measurement<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;6.3 Rotational speed measurement<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;6.4 Input power measurement<br>7 Verification of instruments<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;7.1 Checking of flowmeters similar to standard devices<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;7.2 Adjustment of throttling device<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;7.3 Checking of velocity distribution at pressure <br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;tapping<br>8 Evaluation and presentation of test results<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;8.1 Evaluation<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;8.2 Uncertainty of measurement<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;8.3 Conversion of test results to the operating <br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;conditions given in the catalogue<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;8.4 Example of application