I am using the Electrical Safety Analyzer ESA620 of the "Fluke Biomedical".
In order to tests a medical device, I have to plug it in the plug of the ESA. In this way the device can get electrical power from the ESA.

My problem:
in this tests work only the device that have an incorporate battery. The devices that do not have internal battery do not work at all, and the ESA cannot measure anything.

Thank you,