Version 1.01 (December 2025)
This Excel-based tool was developed by EMSA to perform the stepwise calculation of air compressor isentropic efficiency based on test results as specified in ISO 1217 Annex C and Amendment 1. Please be aware that it contains macros, you will need to accept this to use it.
A report is also available, summarising the test results of EMSA’s international round robin testing programme, exchanging two commercial, packaged electric motor-driven screw compressors between three laboratories worldwide. The report includes a practical guide for measuring specific energy and isentropic efficiency of packaged air compressors in line with ISO 1217:2009 and Amendment 1:2016.
For assistance and questions when using the tool, please contact us via [email protected]
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