What is the difference between ESD and EFT compliance testing.
EFT is continuous and ESD is not?
There are several differences. EN 61000-4-2 ESD testing consists of both air discharge and contact discharge transient testing. And yes, the "hits" are generally a few seconds apart. You deliver the hits to all exposed metal surfaces, or anything else that will attract a discharge.
EN 61000-4-4 Electric Fast Transient (EFT) testing can either be conducted in via the power cord, or for IO lines, a 1 meter capacitive clamp is used to couple the transients into the IO lines. The transients are bursts that are spaced about 100ms apart (IIRC), and the test goes on for something like 30 seconds or so.
Discussion of EFT "Burst" testing: http://www.google.com/url?sa=t&rct=...OpGB9THxTynmDtEGCmQzd1w&bvm=bv.45645796,d.cGE
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