I.S. EN 60041:1995

FOREWORD
PREFACE
SECTION ONE - GENERAL RULES
1. Scope and object
    1.1 Scope
    1.2 Object
    1.3 Types of machines
    1.4 Reference to IEC and ISO standards
    1.5 Excluded topics
2. Terms, definitions, symbols and units
    2.1 General
    2.2 Units
    2.3 List of terms, definitions, symbols and units
3. Nature and extent of hydraulic performance guarantees
    3.1 General
    3.2 Main guarantees
    3.3 Other guarantees
4. Organisation of test
    4.1 Adequate provision for the test
    4.2 Authority for test
    4.3 Personnel
    4.4 Preparation for test
    4.5 Agreement on test procedure
    4.6 Instruments
    4.7 Observations
    4.8 Inspection after test
    4.9 Final report
SECTION TWO - EXECUTION OF TEST FOR THE DETERMINATION OF
THE STEADY STATE PERFORMANCE OF THE MACHINE
5. Test conditions and procedure
    5.1 General test procedure
    5.2 Test conditions to be fulfilled
6. Computation and analysis of results
    6.1 Computation of test results
    6.2 Uncertainties in measurements and presentation of
    results
    6.3 Comparison with guarantees
SECTION THREE - EXECUTION OF TEST FOR THE DETERMINATION
OF THE TRANSIENT CHARACTERISTIC OF THE MACHINE
7. Test conditions and procedure
    7.1 Test conditions
    7.2 Test procedure and instrumentation
8. Computation and analysis of results
    8.1 Conversion of results
    8.2 Comparison with guarantees
SECTION FOUR - METHODS OF MEASUREMENT
9. Introduction
    9.1 Efficiency
    9.2 Hydraulic power
    9.3 Mechanical power
10. Discharge
    10.1 General
    10.2 Current-meter method
    10.3 Pitot tubes
    10.4 Pressure-time method
    10.5 Tracer methods
    10.6 Weirs
    10.7 Standardized differential pressure devices
    10.8 Volumetric gauging method
11. Specific hydraulic energy of the machine
    11.1 General
    11.2 Determination of the specific hydraulic energy
    11.3 Determination of the net positive specific energy
    11.4 Pressure measurements
    11.5 Free water level measurements
    11.6 Uncertainty of measurements
12. Power
    12.1 Indirect method of power measurement
    12.2 Direct method of power measurement
    12.3 Bearing losses
13. Rotational speed
    13.1 General
    13.2 Speed measurements in the case of direct measurement
    of power
    13.3 Speed measurements in the case of indirect
    measurement of power
    13.4 Uncertainty of measurement
14. Thermodynamic method for measuring efficiency
    14.1 General
    14.2 Efficiency and specific mechanical energy
    14.3 Procedure for measurement of specific mechanical
    energy
    14.4 Apparatus
    14.5 Test conditions to be fulfilled
    14.6 Corrective terms
    14.7 Uncertainty of measurement
15. Index tests
    15.1 General
    15.2 Relative discharge measurement
    15.3 Measurement of other quantities
    15.4 Computation of results
    15.5 Uncertainty of measurement
Appendix A - Systematic uncertainties in performance
             measurements at steady state conditions
Appendix B - Rejection of outliers
Appendix C - Analysis of the random uncertainties for a
             test at constant operating conditions
Appendix D - Analysis of the random uncertainties for a
             test over a range of operating conditions
Appendix E - Physical data
Appendix F - Derivation of the equation for the specific
             hydraulic energy of a machine
Appendix G - Measurement of electric power - Determination
             of the correction for a single-phase measuring
             system
Appendix H - Thermodynamic method - Examples for a balance
             of power and computation of the specific
             mechanical energy
Appendix J - Acoustic method of discharge measurement
Annex ZA (normative) Other international publications quoted
in this standard with the reference of the relevant European
publications

Covers the arrangements for tests at the site to determine the extent to which the main contract guarantees have been satisfied. It contains the rules governing their conduct and prescribes measures to be taken if any phase of the tests is disputed.