Lab bench power Supply: 5mA flowing with no load attached

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Moritz Boch

Joined Jun 7, 2019
3
When I power up my Bench power Supply (no matter what voltage) with no load attached the Ampmeter always says 5mA are flowing . After around five minutes of usage this current disappears. Any ideas what could be the problem?
 
What's the model of the power supply? Can you upload a picture? Sometimes these kind of variations are related to the display precision and the tolerance allowed. But 5 mA is too big to consider it a margin of error.
 

Dodgydave

Joined Jun 22, 2012
8,467
When I power up my Bench power Supply (no matter what voltage) with no load attached the Ampmeter always says 5mA are flowing . After around five minutes of usage this current disappears. Any ideas what could be the problem?
It does say allow10mins to settle..!!
 
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