UNI-T UDB3000S Series: UDP3305S / UDP3305S-E

[Pfriemler]

For all German/European users that are interested in the S-E version:
https://www.pollin.de/p/uni-t-labornetzgeraet-udp3305s-e-4-kanal-programmierbar-328-w-353199
379 Euro, some promotion code or sell actions may clear the shipment costs to Zero.

[thephil]

And someone told me that you can get the S-E version for 342€ right now through the UNT-T subsidiary in Augsburg, Germany. But you have to ask them for the "promotion" price.

[elemakil]

Hey thephil,

can you shed any more light on the promotion that UNI-T is offering? Do I have to contact them through the webstore or Email (if so, which of the Emails listed on their homepage is appropriate for this request?). I'd appreciate some more information as the UDP3305S-E would be a great bargain at this pricepoint.

Best,

[thephil]

can you shed any more light on the promotion that UNI-T is offering?

Apparently, UNI-T has/had(?) advertised a 20% discount in the US. Someone told me that he saw that and simply asked the German UNI-T people about it and was offered the price I mentioned. He wrote or talked to these guys:

Uni-Trend Technology EU GmbH
Affinger Str. 12
86167, Augsburg
+49(0)821 710 498 26
service-eu@uni-trend.com

I don't know if it still works but can't hurt to ask.

[Duglum]

I wrote them and they replied with a discount code ("THANKYOU10") for their Shop.
The email claimed the code will only be valid until tomorrow.. but i kinda doubt it.

Anyway, it brought down the price for the UDP3305S-E to 296.10€ net (352.36€ gross for me, which means they applied the 19% german VAT).
Shipping was free. The shop also said delivery time will be 2-4 business days, so they most likely send it from Augsburg.. international express from china for such a heavy item would probably be far too expensive to offer it for free.

Oh and, did anyone ever try to replace the 14bit DAC with the DAC8562 chip iAleks mentioned earlier in this thread? Replacing the firmware with the "S"-one sounded like it was no problem. Don't really need that type of precision and would probably not do it before warranty runs out, but it would be nice to have the option.

[voltlog]

For those wondering if they can upgrade the UDP3305S-E to be a higher spec UDP3305S just by replacing the ADC/DAC chips (ADS1118 / DAC8562 ) and flashing new firmware, UNI-T says "It's not possible!"

At Embedded World 2024 in Nuremberg, I had the opportunity to talk to the senior engineer in charge of the team that developed this PSU at UNI-T and asked him if it would be possible to swap the ADC/DAC chips and flash different firmware for the conversion.

Our conversation was very limited because he only spoke little english but what I could understand is that there are two problems that one will face: there are other smaller changes on the PCB apart from ADC/DAC chips and then there is the very important calibration which is only designed to be done at the factory, not accessible to the user.

BTW I also have a reaview & teardown video of the UDP3305S.

https://youtu.be/h7XDSfOQJHI
https://youtu.be/d056TNS9aa8

[mws]

I also saw the offer here. Unfortunately, I can't find a way to enter the code on the UNI-T website.

[pope]

I also saw the offer here. Unfortunately, I can't find a way to enter the code on the UNI-T website.

It's been removed.

[tonyalbus]

A while ago i received new firmware 1.12 , i see it not on their website, so decided to post it here.
Also the change log is very limited on there website, so i have here the one i received.



V1.12 update:
Optimize list output function.

V1.11 update:
Strategy for changing the output setting value and protection value: The output setting value can be made greater than the protection value.

V1.10 update:
1. Optimize SOCKET connection mode;
2. Solve the bug of occasional loss of sent data in SOCKET connection.

V1.09 update:
1. Add SOCKET connection mode, the connection port is 5025;
2. Optimize network connection.

V1.08 update:
1. Improve SCPI standards;
2. Add memory-related communication commands;
3. Optimize the local file manager and display the applicable channels of this list file and delayer file before the file name.

V1.07 update:
1. Add large font display mode.

V1.06 update:
1. Add power-on output function.

V1.05 update:
1. Added new communication commands to adapt to the NeptuneLab platform;
2. Added German to multiple languages.

V1.03 update:
1. The time resolution of timer and delayer is upgraded to 0.1 seconds.
2. The change strategy is: when the output setting value is greater than the reasonable value, the current value will not be changed.
3. An "error status" is added to the list output running status. When the output value set by the list is greater than a reasonable value, an error will be reported.
4. Add a shortcut for setting UI language.

Upgrade method:
1. Select the upgrade file according to the model and put it in the root directory of the FAT32 format U disk (the file name cannot be modified);
2. Insert the USB flash drive into the machine to be upgraded (power off);
3. Press and hold the "UTILITY" button to turn on the computer and start the upgrade;
4. After the upgrade is completed, manually restart the machine.

Video how to: