Author Topic: Power Supply Contest! Free E36312A  (Read 6305 times)

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Offline adamgreig

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Re: Power Supply Contest! Free E36312A
« Reply #100 on: December 02, 2017, 04:42:27 PM »
Happy to oblige!

This is an unloaded output of ch1 into high impedance scope input. The smallest programming step on the list mode is 10ms, which is about as good as you can get by programming remotely, but perhaps you could step faster with a digital IO driving the list. Each test is the psu list first, then scope captures.

You can see these two chunky 200R on ch1 (which has 470u output capacitance on the front panel, and maybe a bit more elsewhere), while ch2/ch3 have just one 200R and 100u output capacitance. More or less matches up with the discharge times.
 
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Offline nicalitz

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Re: Power Supply Contest! Free E36312A
« Reply #101 on: December 02, 2017, 09:45:48 PM »
Hi everyone, the power supply folks recently kicked off a contest and are giving away an E36312A every week through January.

Here's a link to enter:
http://rfmw.em.keysight.com/promotions/powerupyourbench.html?cmpid=Rdt_puyb0917

To enter:
Quote
Power Up Your Bench with a power supply solution that can help identify and address problems early in the design process.

You can win this new power supply for your own bench! Just tell us what you would do with your new bench power supply, and you could win a new Keysight E36312A triple output power supply!

1. Upload a video, story, or story with a picture telling us how a new Keysight power supply will help you ‘Power Up Your Bench’
2. Submission must be related to and/or contain a power supply
3. Submission must include a title for your story

Winners will be selected weekly by a panel of judges and entries will be accepted from August 28, 2017 through January 26, 2018. Check back to view entries and submit another story - multiple entries are allowed!

I'm not gonna lie, the odds are looking pretty good for anyone who enters ASAP with a decent submission.

And the eligibility from the T&Cs:
Quote
Promotion Description/Eligibility. No purchase necessary. This promotion is limited to specific countries and is only open to entrants aged 18 years or older at the time of submission who are legal residents of, and physically located within, Austria, Australia, Belgium, Canada (excluding the Province of Quebec), China*, Czech Republic, Denmark, Finland, France, Germany, India, Ireland, Malaysia, Netherlands, New Zealand, Poland, Spain, Sweden, Switzerland, Taiwan, United Kingdom, United States (excluding Arizona). Government agencies and institutions (including public universities), and their employees, are not eligible to participate or receive prizes, nor are individuals who appear on the U.S. Government Department of Treasury’s Specially Designated Nationals List.

No South Africa? :( .. even entry level equipment is already seriously expensive on a South African salary (the shipping costs to our somewhat isolated location definitely doesn't help). On top of that, we don't really have a second hand market for equipment like this either. Would be great to have an opportunity to enter such competitions as well. Hopefully next time
 

Offline bitseeker

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Re: Power Supply Contest! Free E36312A
« Reply #102 on: December 03, 2017, 07:15:53 AM »
Happy to oblige!

This is an unloaded output of ch1 into high impedance scope input. The smallest programming step on the list mode is 10ms, which is about as good as you can get by programming remotely, but perhaps you could step faster with a digital IO driving the list. Each test is the psu list first, then scope captures.

You can see these two chunky 200R on ch1 (which has 470u output capacitance on the front panel, and maybe a bit more elsewhere), while ch2/ch3 have just one 200R and 100u output capacitance. More or less matches up with the discharge times.

Thanks, Adam. Nicely done. You can definitely see the impact to the steps on the way down. It's not too bad until that last step from 1V to 0. Makes you want to experiment with the output circuitry (if it wasn't brand new).
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Offline nihtila

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Re: Power Supply Contest! Free E36312A
« Reply #103 on: December 07, 2017, 11:17:34 AM »
I got my box! And follow-up to some discussion a page or two back, I did not need to pay anything. Although it was shipped from Malaysia. So this was handled some different way again to those two example cases I mentioned before. Anyway, happy winner without any tax bills! But it is definitely not clear when you win something how things are gonna end up. But then again, if expenses occur you have signed up to take care of them.

Thank you Keysight - again!
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Offline Fred27

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Re: Power Supply Contest! Free E36312A
« Reply #104 on: December 09, 2017, 09:15:20 AM »
I'm loving my power supply and really appreciate Keysight running yet another great competition.

For those of you who are happy that you didn't have to pay any tax, I may have some bad news for you. My PSU arrived about 6 weeks ago and it seemed like they was no tax to pay. Today I had a demand from DHL for tax and import duty. That's all fair enough and I'm happy to pay it - especially as the declared value was a fair bit less than retail.

The only problem I had that as it was delivered to my work address the demand came to my employer and there was a bit of confusion. My boss knew nothing about it and wasn't happy about a tax demand for something the company hadn't ordered. I had a call from DHL that *so* sounded like a scam that I hung up on them. All a bit messy!
 

Offline adamgreig

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Re: Power Supply Contest! Free E36312A
« Reply #105 on: December 09, 2017, 09:49:30 AM »
For those of you who are happy that you didn't have to pay any tax, I may have some bad news for you. My PSU arrived about 6 weeks ago and it seemed like they was no tax to pay. Today I had a demand from DHL for tax and import duty. That's all fair enough and I'm happy to pay it - especially as the declared value was a fair bit less than retail.

You should check with Keysight before paying - I think they intended to have paid the import tax, for the UK shipments at the least, so it's worth double checking...
 

Offline Fred27

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Re: Power Supply Contest! Free E36312A
« Reply #106 on: December 09, 2017, 10:00:18 AM »
I've got no problem being responsible for the tax - unless Keysight have already paid it and DHL are trying to play both sides. I probably wouldn't put that past them!
 

Offline metrologist

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Re: Power Supply Contest! Free E36312A
« Reply #107 on: December 09, 2017, 10:22:22 AM »
If they declare the value as COGS, etc. I'd be loopy if I won...
 

Offline nihtila

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Re: Power Supply Contest! Free E36312A
« Reply #108 on: December 11, 2017, 08:46:00 PM »
I'm loving my power supply and really appreciate Keysight running yet another great competition.

For those of you who are happy that you didn't have to pay any tax, I may have some bad news for you. My PSU arrived about 6 weeks ago and it seemed like they was no tax to pay. Today I had a demand from DHL for tax and import duty. That's all fair enough and I'm happy to pay it - especially as the declared value was a fair bit less than retail.

The only problem I had that as it was delivered to my work address the demand came to my employer and there was a bit of confusion. My boss knew nothing about it and wasn't happy about a tax demand for something the company hadn't ordered. I had a call from DHL that *so* sounded like a scam that I hung up on them. All a bit messy!

Oh ok, good to know. And be prepared.

I don't have problems paying taxes on these if that is the case but those courier companies are just a bunch of scumbags, especially DHL (same experience in two countries I've lived in). Sometimes they have huge fees and no way to avoid. I also think they just make up those value numbers for VAT (which luckily can be an advantage as well) as I am often seeing so round numbers that cannot be result of any calculation. For example, if you need to pay £100 VAT it may be £50 VAT and £50 fees - so they deliberately use very low value? But you don't even get any cost breakdown unless you ask. And as the VAT cost for you is still lower than it could be, you don't want to ask more questions. Clever eh?

Sending VAT invoice afterwards sounds a bit odd as they usually don't release the parcel before they get the VAT money as they need to pay it themselves. Hard to believe they would really try to bluff that bad though..

Something related to the topic as well - this PSU seems to have lots of bugs and UI quirks (for a Keysight product)! I really hope they put some effort on fixing these.
« Last Edit: December 11, 2017, 08:48:12 PM by nihtila »
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Offline Krampmeier

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Re: Power Supply Contest! Free E36312A
« Reply #109 on: December 12, 2017, 09:05:28 AM »
I got a call from DHL Express today - the parcel with my unit was stopped at the German customs because they thought it would be a commercial shipment. I had to send them a declaration that this is a private shipment to my private address, and originates from winning an idea contest - we'll see if / how much they want me to pay in the end...
 

Offline Krampmeier

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Re: Power Supply Contest! Free E36312A
« Reply #110 on: December 14, 2017, 06:36:04 AM »
I got my unit today  :-+ ! Keysight spared no expenses and shipped it via DHL Express international - I am really impressed by their generosity! I did not have to pay anything, as everything was taken care of by Keysight.
I did not have much opportunity to play with the power supply yet, but for now I am a happy camper. Some parts for the next project also arrived as well, so there willl be enough opportunity to use the new toy!

The signs of immatureness of the firmware, which are pointed out in the video linked by nihtila, are nothing compared to the downsides of my old power supply... I hope they will be fixed soon though!

I wonder if we'll eventually see some custom firmware for this unit, and maybe hardware hacks as well (eg. constant current discharge circuit instead of bleeder resistors)!
 
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Offline nctnico

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Re: Power Supply Contest! Free E36312A
« Reply #111 on: December 14, 2017, 07:27:02 AM »
Congrats! You actually won twice. You got your unit for free and you got it quick. I ordered the 160W version but I have to wait another 6 weeks for it to arrive  :'(
There are small lies, big lies and then there is what is on the screen of your oscilloscope.
 

Offline HighVoltage

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Re: Power Supply Contest! Free E36312A
« Reply #112 on: December 14, 2017, 07:03:29 PM »
Nice, that you got your PSU, Krampmeier

I had not even noticed many of the firmware problems pointed out in the video above and I totally agree, that the positive aspects of this E36312A are much higher than some of the software shortcomings.

What I like the most is the keypad, that I can just enter the desired values.
That is something I have always been missing in Agilent power supplies.
 
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Offline nowlan

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Re: Power Supply Contest! Free E36312A
« Reply #113 on: December 14, 2017, 07:21:07 PM »
How to win this?

1. Show my lab powered by lemons?
2. Show how LXI would benefit me?

Or is it just show off what you're currently using?
 

Offline Mr. Scram

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Re: Power Supply Contest! Free E36312A
« Reply #114 on: December 14, 2017, 07:34:23 PM »
How to win this?

1. Show my lab powered by lemons?
2. Show how LXI would benefit me?

Or is it just show off what you're currently using?
If we knew, we'd all have a new supply!
 

Offline nihtila

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Re: Power Supply Contest! Free E36312A
« Reply #115 on: December 14, 2017, 08:36:50 PM »
I do agree it is a huge improvement over the old Agilent supplies but was still a bit surprised by the amount of bugs and oddities shown in that video. And he has some very nice suggestions there as well, e.g. showing energy instead of instantaneous power for small-power applications.

I use those old Agilent triple output ones at work and they are not very user-friendly. Small display showing only one output at a time, no numpad, cumbersome setting between voltages and current limits, etc... So yes these major flaws have been fixed in these new ones along with loads of new features added.

We also have one of those big N6705 supplies at work, these E36300 have clearly borrowed loads of features from there.

Power output is not very high on this smaller model and sense lines are only on rear connectors but doesn't bother me. Although I may make some kind of cable distribution block from the back using the sense lines as well.

I also like how it is very quiet. Although I usually have my scope on as well which is a lot louder. But nice to have a quiet PSU as I mainly do audio stuff.

I still don't understand keeping the fan on when the unit is powered off though! But not an issue as I switch off power completely from my bench when not in use.
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Offline DiligentMinds.com

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Re: Power Supply Contest! Free E36312A
« Reply #116 on: Yesterday at 09:19:23 AM »
I do agree it is a huge improvement over the old Agilent supplies but was still a bit surprised by the amount of bugs and oddities shown in that video. And he has some very nice suggestions there as well, e.g. showing energy instead of instantaneous power for small-power applications.

I use those old Agilent triple output ones at work and they are not very user-friendly. Small display showing only one output at a time, no numpad, cumbersome setting between voltages and current limits, etc... So yes these major flaws have been fixed in these new ones along with loads of new features added.

We also have one of those big N6705 supplies at work, these E36300 have clearly borrowed loads of features from there.

Power output is not very high on this smaller model and sense lines are only on rear connectors but doesn't bother me. Although I may make some kind of cable distribution block from the back using the sense lines as well.

I also like how it is very quiet. Although I usually have my scope on as well which is a lot louder. But nice to have a quiet PSU as I mainly do audio stuff.

I still don't understand keeping the fan on when the unit is powered off though! But not an issue as I switch off power completely from my bench when not in use.

One of the best things I like about Keysight, is that if their instrument has a problem, you can rest assured that they will (eventually) fix it.  Other brands... not so much...  I'm sure they are already hard at work fixing all of the bugs (and more).  It will get addressed, but probably not before the holidays though.

I hope I win one of these supplies-- I desperately need one and I cannot afford to buy a new one.  If not, I will be forced to buy a refurbished Rigol 832-- but that is a "plastic toy" compared to the Keysight supply...

-Ken
 


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