Hi there, I ve bought recently my very first power supply 30v 5A. Please anyone can tell me if it’s a normal behaviour that the OCP alarm start when I set current output under 0.089A. It just happen when I set current output from 0.001 to 0.089A.

 

What does the owners manual say? What is the model #?

 

Depends on the settings.

 

It just happen when I set current output from 0.001 to 0.089A.

It may be that you can't reliably set the current limit below 100mA.

 

What does the owners manual say? What is the model #?

its a cheap one: Wanptek Aps305h

 

From the owners manual:


From that description the buzzer should only sound if there is a short or the load is trying to draw more current then the supply was set at.
From your description of the issue it appears there may be a minimum CC setting for the alarm although no mention in the manual I could find.
It's possible there is a defect.
I guess the only way to know is for someone with the same supply to post a reply as you mentioned.