DIN EN 60068-2-17:1995-05

The document includes a number of tests which use different conditioning procedures appropriate for different applications. Test Q may be subdivided in the following two sub-groups, distinguished by their detection methods, viz: internal detection, which measures changes of electrical characteristics produced by the test medium (liquid or gas) introduced into the specimens through the leak; external detection, where by the escape of the test medium through the leak is observed.