Foreword
Introduction
1 Scope
2 Normative references
3 Terms, definitions and symbols
   3.1 Terms and definitions
   3.2 Symbols
4 Quantities to be measured
5 General conditions and procedures
   concerning in situ tests
   5.1 General recommendations
   5.2 Selection of test point when only the
        system resistance to be varied
   5.3 Fans fitted with adjustment devices
   5.4 System throttling devices allowing the system
        resistance to be altered
   5.5 Selection of the test point when the system
        resistance cannot be varied
   5.6 When correction of the coefficient deduced from
        the test is not necessary
6 Instrumentation
   6.1 Instrumentation for measurement of pressure
   6.2 Measurement of air velocity
   6.3 Measurement of temperature
   6.4 Determination of density
   6.5 Measurement of rotational speed
7 Determination of fan pressure
   7.1 Location of pressure measurement plane
   7.2 Measurement of fan pressure
8 Determination of flow rate
   8.1 Choice of measuring method
   8.2 Choice of measuring section
   8.3 Determination of flowrate using differential pressure
        devices
   8.4 Determination of flowrate by velocity area methods
9 Determination of power
   9.1 Definition of performance characteristics
        relating to the power of a fan
   9.2 Losses during transmission of power from
        the motor to the impeller
   9.3 Methods for determination of power
   9.4 Measuring instruments
   9.5 Precautions to be taken during in situ tests
10 Uncertainty associated with the determination of
   fan performance
   10.1 General
   10.2 Performance errors
   10.3 Uncertainty of measurement
   10.4 Specified uncertainties
   10.5 Analysis of uncertainty
Annex A (normative) - Position of exploration lines for
        a marginal wall profile compatible with a general
        power law
Annex B (normative) - Determination of the position of the
        marginal exploration lines in cases not covered
        by Annex A
Annex C (normative) - Minimum straight lengths required
        upstream and downstream of the differential
        pressure devices (DP device) used for flow measurement
Annex D (normative) - Loss allowance for straight, smooth ducts
        and standardized airways
Annex E (normative) - Rotating vane anemometer calibration
Bibliography