What is ISO 9110-2 about?
ISO 9110 is a series on hydraulic fluid power. A hydraulic fluid power system has a pump driven by a prime mover (such as an electric motor or internal combustion engine) that converts mechanical energy into fluid energy. ISO 9110-2 establishes procedures for measuring the average steady-state pressure in a hydraulic fluid power conduit. ISO 9110-2 is applicable to the measurement of average steady-state pressure in closed conduits with inside diameters greater than 3 mm, transmitting hydraulic fluid power with average fluid velocities less than 25 m/s and average steady-state static pressures less than 70 MPa. ISO 9110-2 provides the formulae for estimating the total uncertainty in each pressure measurement.
Note: ISO 9110-2 is not applicable to sensors that are flush-mounted with, or an integral part of, the closed fluid conduit wall.
Who is ISO 9110-2 for?
ISO 9110-2 on hydraulic fluid power is useful for:
- Hydraulic system manufacturers
- Design engineers
- Research and development facilities
- Quality check personnel
Why should you use ISO 9110-2?
Universal and standardized techniques for the measurement of pressure are required for accurate and repeatable evaluation of fluid power systems. The purpose of ISO 9110-2 is to present recommended practices for the measurement of average steady-state pressure in hydraulic fluid power systems.
Electronic filtering techniques as described in ISO 9110-2 are for smoothing or averaging an electrical transducer's signal, caused by pressure pulsations, may be used in lieu of mechanical damping. Select filter networks whose output produce an average steady-state pressure reading for the pulsation frequency range encountered in the measurement situation. Using ISO 9110-2 you can measure the average steady-state pressure in a hydraulic fluid power conduit.
What’s changed since the last update?
BS ISO 9110-2:2020 supersedes BS ISO 9110-2:1990. BS ISO 9110-2:2020 includes some technical changes with respect to BS ISO 9110-2:1990. These include:
- The list of normative references has been revised
- Additional terms and definitions have been added
- The evaluation of the readability of measuring instruments has been deleted and moved to ISO 91101
- The calibration of working instruments has been deleted and moved to ISO 91101
- The selection and installation of test equipment has been revised and combined and test data acquisition has been renamed as measuring instrument selection
