METRON QA-ST, User And Service Manual

Page: 23 / 48

4.5 Le
akage
Cur-
rent –
Exter-
nal
Case
The purpose of this test is to determine if there is any leakage cur-
rent between DUT Enclosure (chassis) and Mains Supply Ground.
1. Connect the Kelvin Clamp to the chassis of the DUT.
2. Press “Leakage current Ext. Case”.
3. The value will be displayed on the LCD. Note the value.
4. Next, press “Outlet Supply RS” (Reversed Supply). The dis-
played QA-ST value may change.
5. Then, press “Outlet Supply OG” (Open Ground). The dis-
played QA-ST value may change.
6.
7