SAE J 2970
This standard provides the testing and functional requirements guidance necessary for a leak detection device that uses any non-A/C refrigerant tracer gas, such as helium or a nitrogen-hydrogen blend, to provide functional performance equivalent to a refrigerant electronic leak detector. It explains how a non-refrigerant leak detectors calibration can be established to provide levels of detection equal to electronic leak detectors that meet SAE J 2791 for R-134a and SAE J 2913 for R-1234yf.