Products > Test Equipment
E36300 Series Programmable DC Power Supplies (E36311A, E36312A, E36313A)
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nctnico:
With the most recent firmware only channel 1 is affected. I made it a habit to disconnect everything from channel 1.
HighVoltage:
Many many years ago, I was hit with a "crowbar issue" of an Agilent power supply that was killed and learned the hard way to always remove any connections from it, before doing a power cycle. So, it has become also a habit for me, to never leave anything connected.
Omicron:
In my opinion it is an unforgivable flaw. Especially for a company with the pedigree of Keysight. A power supply that is turned off should never be putting out energetic spikes on any of its outputs. If they had any decency they would recall these units. I bought this device but I refuse to defend it in any way.
rsjsouza:

--- Quote from: Omicron on May 21, 2018, 04:23:31 pm ---My guess is it can't be fixed in software and so they are keeping quiet.

--- End quote ---
That is my guess as well.


--- Quote from: HighVoltage on May 21, 2018, 07:19:48 pm ---Many many years ago, I was hit with a "crowbar issue" of an Agilent power supply that was killed and learned the hard way to always remove any connections from it, before doing a power cycle. So, it has become also a habit for me, to never leave anything connected.

--- End quote ---
Despite I was never hit with such problem with a lab power supply, I was hit enough times with other types of supplies that I never take any soft switch systems for granted - either it has a mechanical disconnect (a.k.a. clunking switch) or I simply don't trust it.
nctnico:

--- Quote from: Omicron on May 21, 2018, 07:52:01 pm ---In my opinion it is an unforgivable flaw. Especially for a company with the pedigree of Keysight. A power supply that is turned off should never be putting out energetic spikes on any of its outputs. If they had any decency they would recall these units. I bought this device but I refuse to defend it in any way.

--- End quote ---
I agree that if Keysight can't fix this with a firmware upgrade they have to do a recall. Unfortunately even the A brands seem to push too hard to get gear on the market nowadays.
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