DIN 24163-3:1985-01

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

Together with DIN 24163 Part 1, applies to small fans as defined in clause 2.