Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Instrumentation
5 Manufacturer's data
6 Test conditions
6.1 Test methods
6.2 Operating condition of the test subject
6.3 Ambient condition
6.4 Arrangement of measuring points
6.4.1 General
6.4.2 Apparatus with vertical air throw and draw
through arrangement
6.4.3 Apparatus with horizontal air throw and draw
through arrangement
6.4.4 Special apparatus
7 Test procedures
7.1 Measurement of sound pressure/intensity levels
7.2 Measurement of the background noise
7.3 Data to be recorded
8 Calculations
8.1 Correction value for the background noise
8.2 Correction value for the influence of the ambient
8.3 Calculation of sound data
8.3.1 A-weighted sound power level
8.3.2 Average sound pressure level on the partial
measuring areas a to e
8.3.3 Sound power level of the test subject
9 Conversion to nominal fan speed
10 Test report
Annex A (normative) Positions of measuring points
for vertical air throw
A.1 Example with one fan
A.2 Example with six fans
Annex B (normative) Positions of measuring points for
horizontal air throw
B.1 Example with one fan
B.2 Example with six fans
Annex C (normative) Standard method for calculating the
sound pressure level
Annex D (normative) Deviations from the test subject
D.1 Model ranges composed of modules
D.2 Dimensions of the heat exchanger coil
Annex E (informative) Directivity
E.1 General
E.2 Definition
E.3 Calculation of the directivity number
Bibliography