BS 848-6(2003) : 2003

Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols and units
5 Mounting of test rig
   5.1 General
   5.2 Resilient base mounting of fan
   5.3 Mounting of fans with resilient elastic rope
   5.4 Stiff mounting of fans
   5.5 Flexible connections
6 Measuring equipment
   6.1 General
   6.2 Calibration
   6.3 Instrument system
   6.4 Transducers
   6.5 Piezoelectric accelerometers
   6.6 Preamplifiers
   6.7 Analysers
   6.8 Indicators
   6.9 Outputs
7 Transducer attachment
   7.1 General
   7.2 Attachments
8 Selection of measuring positions
   8.1 General
   8.2 Mounting on combination base frame
   8.3 Mounting of transducers for other fans
9 Test environment and operating data
10 Procedure
   10.1 General
   10.2 Measurement parameters
   10.3 Frequency analysis
11 Presentation of results
Annex A (informative) - Guide to calculating resilient mount
                        positions and rigid body natural frequencies
Annex B (informative) - Secondary measurement methods for in situ
                        testing or quality grading
Annex C (informative) - Recommended measuring positions for machinery
                        health measurements
Annex D (informative) - Relationship between absolute and decibel
                        levels
Annex E (informative) - Relationship between vibration magnitude
                        of single frequency signal
Bibliography

Specifies a method of measuring the vibrational characteristics of fans of all types, except those designed solely for air circulation.