CALIBRATOR RS - Page 1
Forum section: electronics / general

author: lionelkjh
author_rank: Frequent Contributor
timestamp: December 20, 2021, 05:54:00 pm
content: Good evening everyone! I bought an RS calibrator (quite old), but relatively functional ..... On the other hand, the generated tensions are a little far from reality. My question is the following: does someone have the technical documentation to redo a complete calibration, (when I opened it I noticed that a large number of potentiometers were present, but I do not know what the ranges are? to be settled respectively) .... Thanks to all who can help me !! I am attaching the photos to you ....

author: tggzzz
author_rank: Super Contributor
timestamp: December 20, 2021, 08:04:24 pm
content: The full answer ishere

author: lionelkjh
author_rank: Frequent Contributor
timestamp: December 22, 2021, 12:10:04 pm
content: Hello; even with glasses, I can't find anything ?? !!

author: Gyro
author_rank: Super Contributor
timestamp: December 22, 2021, 12:43:20 pm
content: Yes, they was a slightly miss-typed hint about double posting.The trouble is, nobody else can find anything either! It's no longer listed by RS and the only part number search hits are for a few places claiming to be able to calibrate them, which cost-wise probably isn't what you want.As you've already had it apart once, a few internal photos might help.P.S. Lots of pots might be a good thing - at least you don't have to reverse engineer some non-documented comms protocol.

author: tggzzz
author_rank: Super Contributor
timestamp: December 22, 2021, 01:52:59 pm
content: Typo corrected, doh.The nice thing about having lots of pots is that you can twiddle them individually so that any (single) meter shows readings that are spot on(Until you drop the calibrator, that is)

author: 005
author_rank: Newbie
timestamp: December 23, 2021, 01:17:50 am
content: Seems like it is time for my first post in this forum.Your device reminded me very much of my Burster DIGISTANT 4408, about which I have unfortunately found little information, too. Thank you for giving me a reason to take it apart more than last time when I only checked the NiCd batteries.I was not aware until now that there are so many potentiometers inside for adjustment. The LM3999Z reference explains why this little calibrator deliveres such stable reference as far as I experienced. Its last calibration seems to be more than 24 years ago. I also found a very interesting vertical resistor bodge job.The RS calibrator might have been manufactured by Burster for RS.Hope this helps to gather more information.

author: Gyro
author_rank: Super Contributor
timestamp: December 23, 2021, 09:52:09 am
content: One of the the most useful step with RS own brand stuff - find the original manufacturer!Welcome aboard 005.

author: lionelkjh
author_rank: Frequent Contributor
timestamp: December 27, 2021, 07:19:16 am
content: Hello; ok, thanks for the pictures, but does anyone know how to calibrate it with the 20 potentiometers ??

author: tggzzz
author_rank: Super Contributor
timestamp: December 27, 2021, 09:14:36 am
content: Quote from: lionelkjh on December 27, 2021, 07:19:16 amTwo required starting points: equipment that is more accurate than the UUT, and RTFM of course!

author: lionelkjh
author_rank: Frequent Contributor
timestamp: December 27, 2021, 11:48:07 am
content: Hello; I need a decoder to decipher what you say !!!

author: tggzzz
author_rank: Super Contributor
timestamp: December 27, 2021, 07:15:06 pm
content: UUT is unit under test, sometimes DUT device under test.RTFM you can find yourself

author: lionelkjh
author_rank: Frequent Contributor
timestamp: December 28, 2021, 04:33:15 pm
content: Good evening; after long hours of research and a very precise calibration recorded with the Fluke 289 I finally found the various settings to be taken again to bring it back to life; thank you all!

author: alm
author_rank: Super Contributor
timestamp: December 28, 2021, 05:52:34 pm
content: Did you take any notes that might be worth sharing for future people trying to adjust this calibrator?