What is ISO 11943 about?
ISO 11943 focuses on hydraulic fluid power. Hydraulic fluid power is the use of fluids under pressure to generate, control, and transmit power. ISO 11943 establishes procedures for the validation of equipment for preparation of secondary calibration suspensions and for online counting of particles with or without dilution circuits and the online calibration of APCs.
ISO 11943 defines a procedure to match two or more particle counters with the intention of improving the accuracy of particulate filtration efficiency.
ISO 11943 on hydraulic fluid power establishes methods for:
- Validating equipment used to prepare secondary calibration suspensions for automatic particle counters
- Performing online secondary calibration of automatic particle counters
- Matching two or more online particle counters, i.e., to count the same number of particles at a given size by two APCs associated online
- Validating online particle counting systems with and without online dilution as used, for example, to measure the filtration efficiency of a hydraulic filter as described in the multi-pass filter test
Who is ISO 11943 for?
ISO 11943 on hydraulic fluid power is useful for:
- Aerospace organization
- Industries with metalworking
- Injection moulding sectors
- Material handling industries
- Controllers in the industries
Why should you use ISO 11943?
In hydraulic fluid power systems, power is transmitted and controlled, through a fluid under pressure within an enclosed circuit. The fluid is both a lubricant and a power-transmitting medium. ISO 11943 introduces automatic particle counters (APC) which is an accepted means for determining the size and size distribution of particulate contamination in fluids.
Reliable system performance requires control of the fluid medium. Qualitative and quantitative determination of particulate contaminant, in the fluid medium, requires precision in obtaining the sample and determining the size and distribution of contaminants this can be achieved by the implementation of ISO 11943.
APCs described in ISO 11943 are utilized online to eliminate the need for sample containers, to provide increased accuracy, and to provide for more rapid access to particle count information. A major application of online particle counting is for evaluating the filtration efficiency of hydraulic filter elements during a multi-pass test. Using ISO 11943 you can establish procedures for the validation of equipment for preparation of secondary calibration suspensions and for online counting of particles with or without dilution circuits and the online calibration of APCs.
What’s changed since the last update?
BS ISO 11943:2021 supersedes ISO 11943:2018. BS ISO 11943:2021 has the addition of 7 μm and 14 μm to Table C.2 with respect to ISO 11943:2018.
