Products > Test Equipment
E36300 Series Programmable DC Power Supplies (E36311A, E36312A, E36313A)
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nctnico:
I agree these issues don't instill much confidence. How is it possible that it outputs a boatload of current when you plug it in? This is definitely something I want to test!

The current programming accuracy is specced at +/-3mA and 0.04%. 20mA versus 10mA is way out of spec but OTOH trying to program currents with a precission of several mA isn't going to happen with this power supply.
adamgreig:
I tested just turning on/off from the front and there's no voltage or current to speak of, but when plugging in the mains supply it's another story. Hooked up channel 1 to my 34465A I get these for open circuit voltage and short circuit current:



This is just plugging in, not turning on. It's pretty repeatable, and it does last twice as long open circuit as it does short circuit. Might be interesting to try with an active load to measure the energy available. I think this is pretty standard for many budget bench PSUs though at least this doesn't have problems if left plugged in.
Dubbie:
I often use my Rigol to output low currents for checking LED brightnesses at various currents. While it's not mA accurate, it's within 2-3mA of the display reading at the sub 30mA range. (confirmed with my keysight bench meter)

I have been keen on buying one of these power supplies, but so far it looks WORSE than the Rigol which is 1/4 the price. The 10W standby power is unacceptable also. What on earth is it being used for?
nctnico:

--- Quote from: Dubbie on December 17, 2017, 09:43:02 pm ---I have been keen on buying one of these power supplies, but so far it looks WORSE than the Rigol which is 1/4 the price.

The 10W standby power is unacceptable also. What on earth is it being used for?

--- End quote ---
I'm wondering about the same. I was thinking of modding it to have a real power switch but if the price for that is blowing up anything sensitive connected to it when switching it on then that is no solution either. I'm starting to lean towards cancelling my order because this kind of behaviour is not acceptable for a PSU. With two EEVblog members reporting/showing the same issue it isn't a matter of a defective unit either.
I already played with one of these power supplies but I only tested what happens when the mains are switched off. That showed no overshoot or any other funny stuff. I kinda assumed it would have well defined start-up behaviour as well.
Dubbie:
Just to put my money where my mouth is, I just measured the CC setpoint performance of my rigol with an LED backlight hooked up.
It's actually better than I thought.

I had the voltage set to 6V

Power Supply is the Rigol DP832, Meter is Keysight 34461A

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