Prema 6001 repair - Page 1
Forum section: electronics / repair

author: 1audio
author_rank: Frequent Contributor
timestamp: February 07, 2021, 05:58:15 pm
content: I have a Prema 6001 6 1/2 digit meter that has stopped working. Prema is no longer supporting these in any way. Having done a lot of troubleshooting and replacing any potentially funky chips I believe the problem is a custom Prema chip "Prema CD". Does anyone know of a way to get one of these chips? Its a shame that this instrument has been brought to an end over a custom chip.

author: coromonadalix
author_rank: Super Contributor
timestamp: February 08, 2021, 01:41:29 am
content: Well you'll have to find a 5001 or 6001 for parts, or someone who could sell you some parts ??Could be custom design(s) or simply rebranded ic's ..., you have to analyze the schematics, and maybe with eevblog members here you'll get some answers

author: madao
author_rank: Frequent Contributor
timestamp: February 08, 2021, 05:18:04 am
content: You can write a mail to prema company to ask spare-IC. It is not expensiv (~20€ ). I have repaired a 5017SC with new ADC converter, old is dead.It is a custom-IC from prema, this company make itself.https://www.prema.com/index.php/de/service/messgeraetewartungBut no support for calibration, because last technican is going into retirement, since july 2020Probably is spare part yet avaible.test equpiment story of prema is very very sad. Big issuses with accquiring of SMD compompent has killed test equpiment production. Then it shut R&D down to save of cost. It was 5017/8017 unit. Now, prema has nobody, which can developing high end multimeter.Company is saved, because it has second mainstay. It called semiconductor factory (short "fab"). Prema build fab, because prema need very good ADC converter for own multimeter.greetingsmatt

author: 1audio
author_rank: Frequent Contributor
timestamp: February 08, 2021, 06:44:39 am
content: Thanks for the input. I do appreciate any positive input. I did contact Prema and was told that there is no more support or parts:QuoteThe good news is that if I let it warm up for about 1 hour it goes through many false starts and then works correctly. I reset the calibration zero and its actually just outside its accuracy spec given the time since it was built (approx 50 PPM at 10V) and I'm not quite ready to do a real calibration.Still the 1 hour is a real nuisance. I'll keep it powered while I figure out a next step. Its not dead any more just on a form of life support.

author: ingolf
author_rank: Newbie
timestamp: August 25, 2025, 06:58:07 pm
content: Hi, I'm quite late to this party ...I came across by searching for Prema 6001 issues. I recently aquired a 6001 and it had similar problems. After start it went from time to time over reset, after some time to warm up it got better but not well. I also carefully measured the 5V supply - and of course did not find anything - there was no ripple, no voltage dips. Even though I'm not a "recap-guy" I decided to change the 22uF capacitor at the 5V regulator (LM340-05) output to a 100uF - and this seems to work now.Just in case someone wants to rescue a Prema 6001/5001/6000/5000.regards, ingolf / DH0PE

author: coromonadalix
author_rank: Super Contributor
timestamp: August 25, 2025, 07:29:36 pm
content: and Prema does not exist anymore they filed for bankruptysome services manuals with some eeprom dumpshttps://groups.io/g/PremaDMM