BS ISO 8426:2008

1 Scope
2 Normative references
3 Terms and definitions
4 Symbols and units
5 Test installation
6 General test conditions
7 Test and evaluation procedures
8 Test report
9 Identification statement (reference to this International
  Standard)
Annex A (normative) - Measurement accuracy classes
Annex B (normative) - Calculation of derived capacity using the
                      zero-pressure intercept method
Bibliography

Describes the methods of determining the derived capacity of hydraulic fluid power positive displacement pumps and motors under steady-state conditions and at defined, continuous shaft rotational frequencies.

This International Standard specifies the methods of determining the derived capacity of hydraulic fluid power positive displacement pumps and motors under steady-state conditions and at defined, continuous shaft rotational frequencies.

Units can be tested as a positive displacement pump, with mechanical energy applied to the shaft and hydraulic energy obtained at the outlet fluid connection, or as a motor, with hydraulic energy supplied to the inlet fluid connection and mechanical energy obtained at the shaft.

NOTE Measurement accuracy is divided into three classes A, B and C, which are explained in .