Products > Test Equipment
R&S HMP4040 voltage spike at PSU turn-off
<< < (11/12) > >>
rf-messkopf:

--- Quote from: rf-messkopf on October 10, 2023, 08:11:55 am ---I'll dig out the cal certificate and post the date, but this will take a few days.

--- End quote ---

Okay, here it is: calibration date is 2019-02-27. This dates the implementation of the circuit change that prevents the voltage spike at mains turnoff to early 2019.
electr_peter:

--- Quote from: pdenisowski on October 10, 2023, 11:04:04 am ---Short version:  there are some older HMP’s that show this behavior if channels are not disabled before switching off the device (the recommended shutdown procedure).  We implemented a hardware change several years ago that prevents this from happening, and this modification can be made by our service department if needed.

--- End quote ---
Regarding voltage spikes when switching channels off with mains button, does modification fall under warranty or "service circular"?
pdenisowski:

--- Quote from: electr_peter on October 12, 2023, 08:39:59 pm ---Regarding voltage spikes when switching channels off with mains button, does modification fall under warranty or "service circular"?

--- End quote ---

I'd recommend contacting your local / regional service department:  I'm on the product management side and am not sure how service handles this, especially in different regions.
mahi:
For those wondering how old their HMP power supply is and can't find the original calibration certificate, you can retrieve it via the Rohde & Schwarz website: Download calibration certificate. Just enter the device ID (case sensitive!) and it should recognize the device and offer a download link.


Anyway, to get back to this issue. I got in touch with Rohde & Schwarz customer support in Germany:

The (huge) voltage spikes when switching channels off with mains button is a known issue of the HMP series that can be fixed with Service Circular 16282 by Rohde & Schwarz Service.

Rohde & Schwarz does not provide direct service to private customers (at least not in Europe) so I had to inquire for pricing via a distributor or partner. I received a quote for my HMP4040 of just over 1100 EUR (without VAT and without shipping).

That's almost half of what a new HMP4040 costs. Ouch! That's bit more than I was hoping for (maybe I am naive)...
EEVblog:

--- Quote from: mahi on November 10, 2023, 01:01:41 pm ---For those wondering how old their HMP power supply is and can't find the original calibration certificate, you can retrieve it via the Rohde & Schwarz website: Download calibration certificate. Just enter the device ID (case sensitive!) and it should recognize the device and offer a download link.

--- End quote ---

Wow, does any other manufacturer have this?
Navigation
Message Index
Next page
Previous page
There was an error while thanking
Thanking...

Go to full version
Powered by SMFPacks Advanced Attachments Uploader Mod