NBN EN 60994 : 1993

Cooperating organizations
National foreword
Foreword
Introduction
Section One - General
1. Scope and object
1.1 Scope
1.2 Object
1.3 Excluded topics
2. Terms, definitions, symbols and units
2.1 Units
2.2 Terms
2.3 List of terms specific to this guide
2.4 Classification of hydraulic machines
3. Guarantees
Section Two - Execution of tests
4. Test conditions to be fulfilled
4.1 Operating conditions under which measurements are
     performed
4.2 Checks on the machine before the beginning of tests
5. Test procedure
5.1 Parameters determining the operating point
5.2 Vibration and pulsation quantities to be measured
     and locations of measuring points
5.3 Personnel
5.4 Agreement of test procedure
5.5 Test programme
5.6 Preparations for tests
5.7 Observations
5.8 Repetition of tests
Section Three - Methods of measurement, data acquisition
and processing
6. Considerations relating to the methods of measurement
6.1 Vibrations
6.2 Radial vibrations of the shaft relative to the
     bearings
6.3 Pressure pulsations
6.4 Stresses
6.5 Shaft torque pulsations
6.6 Rotational speed pulsations
6.7 Power pulsations
6.8 Guide vane torque pulsations
6.9 Radial thrust pulsations measured at the guide
     bearings
6.10 Axial thrust pulsations measured at the thrust
     bearing
6.11 Measured quantities defining the machine operating
     point
7. Calibration
7.1 General
7.2 Direct calibration
7.3 Calibration by electrical reference signals
8. Recording
8.1 Graphical recorders
8.2 Magnetic tape recorders
8.3 Digital recording
9. Data acquisition and processing
9.1 General
9.2 Selection of data processing methods
10. Measurement uncertainties
11. Final report
Appendices
A. Formulae for calculating principal stresses and
     signal processing for dynamic strain measurements
     with rosettes
B. Formulae for calculating the torque on a cylindrical
     solid shaft and the axial load on a rectangular or
     circular section link using the strain gauge
     technique
C. Example of final report
D. Distortion of pressure pulsation measurements for
     transducers mounted with connecting pipe
Annex ZA - (normative) Other international publications
quoted in this standard with the references of
the relevant European publications
National annex NA (informative) Committees responsible
National annex NB (informative) Cross-references

Establishes uniform rules to be applied when carrying out vibration and pulsation tests. Indicates criteria for a unified approach for comparing the vibrations and pulsations of different hydraulic machines of the same class. Ensures the possibility of accumulating actual data of sufficient homogeneity on different hydraulic machines. Coverage includes: terms, definitions, symbols and units; considerations relating to the methods of measurement; calibration. Also includes detailed appendices.