So my HP E3615A DC 0-20 V, 0-3 A, 60 W Power Supply arrived today and I powered it up since the auction showed that it powers on.
Constant current works from 0 A to what I want to say Pi (3.14 A)
Voltage goes up to 21.6 V and I did set the OV to 24.5V
Tested the over voltage by setting it to just 12V and it works.
Tested the CC and it works fine as well.
Grounded the negative post so I could hook the PS to my scope.
It does has a 5 Vpp short pulse at power up, then it has another shorter one when the power supply finally engages 60 ms later (a bit longer for the upper voltage range) these transients are very short lived, and the supply reaches the voltage around 50 ms later.
Here is the power up with the supply set to 20 V, the first arrow is when I throw in the switch, the 2nd is when the supply starts supplying.
The problem is that at lower voltages they are still there, here is the power up at 10 V, on power on it still has the 5 Vpp
At 3 V, it's almost overshooting when it actually starts, but the power on goes up to 5 V for a 8 Vpp short burst that goes into the negative as well.
Last, when set to 0.5 V, the overshoot is very pronounced, but very short lived.
Voltage is a bit high in the higher end (20.2V when set at 20.0V, 5.054 V when set to 5.0 V), but it's better in the lower end. (1.0065V when wet to 1.00V)
But it's just a bit under 1%.
I'm happy with it, I hope amc184 had a good deal as well with his.
Should I worry about the powerup spikes?