FS: DIY Calibration Devices (AC, DC OHMS) - Page 1
Forum section: electronics / general

author: Majorassburn
author_rank: Regular Contributor
timestamp: December 17, 2023, 11:42:52 pm
content: I have designed, assembled & fanatically tested some useful calibration devices for validating digital multimeter functionality. I listed them on eBay under Seller: SQWARREL, but I am listing the links here for enthusiasts who might be interested:10VDC Voltage Reference:https://www.ebay.com/itm/285628491010AC Sine Wave Generator:https://www.ebay.com/itm/285612664177OHMS Tester:https://www.ebay.com/itm/285628490537Complete DIY Cal Lab:https://www.ebay.com/itm/285628493572Happy to answer questions. Email:majorassburn@gmail.comThanks for looking.Major

author: deepfryed
author_rank: Unknown
timestamp: December 17, 2023, 11:57:22 pm
content: Don't mean to discourage you, but I think this is wrong place to post / promote a DIY product like yours. If you search for transfer standards, you can see examples of what people here have built and shared. There's even a CAL club that lets people compare notes, so this forum is perhaps not your intended audience.

author: Shock
author_rank: Super Contributor
timestamp: December 18, 2023, 07:55:53 am
content: This forum (buy/sell/wanted) actually is the best place to post things for sale.If you want to discuss the project at length, you can do so in the projects forum.https://www.eevblog.com/forum/projects/

author: deepfryed
author_rank: Unknown
timestamp: December 18, 2023, 08:26:21 am
content: Quote from: Shock on December 18, 2023, 07:55:53 amWhat I meant to say was that people on the eevblog forums tend to have expectations that differ from what OP is offering. In any case it's been discussed in other threads, e.g.https://www.eevblog.com/forum/metrology/affordable-reference-standards-to-have-on-hand-in-a-electronics-lab/

author: Smokey
author_rank: Super Contributor
timestamp: December 18, 2023, 08:29:37 am
content: Do you really hand assemble these on perfboard?Ha! I just noticed your name is Major Ass Burn

author: Majorassburn
author_rank: Regular Contributor
timestamp: December 18, 2023, 12:44:01 pm
content: Yes, my favorite email address is majorassburn@gmail.com which has a long, funny story behind it (for another time).I do hand assemble these on perfboard because I have been selling a few here and there on eBay to owners of cheapie meters who want to verify them.They aren't laboratory standards but they really work well for what they are intended to do.For example, if you are a hobbyist, homeowner, handyman or student and you bought a cheapie Chinese DMM on Amazon and you just want to be sure that it is reading reasonably accurately, these devices help to get you there without spending hundreds of dollars on calibration services, etc.Do my devices work better than the expensive standards and calibrators that pros use? Of course not. But, they do work well enough to let you know that your AC function is reading within 1/2 to 1% or so.I welcome and appreciate all suggestions you guys may have and if you doubt these little buggers really work, buy one and check it out for yourself.Thanks.Major Assburn

author: tggzzz
author_rank: Super Contributor
timestamp: December 18, 2023, 02:14:08 pm
content: Quote from: Majorassburn on December 17, 2023, 11:42:52 pmWhat is your device adjusted against (i.e. type and its calibration status)?How long is the burn-in period?What is the guaranteed 90 day and 1 year performance? Under what conditions, e.g. shock, temperature, power cycling?

author: coromonadalix
author_rank: Super Contributor
timestamp: December 18, 2023, 02:26:40 pm
content: i would say in all of thisit's a matter of how you present your sale, even with DIY projects or professional ones etc ... unless you are a power seller, and some in the past have been kicked outif this respect the eevblog rules, why not if once again it is well said / defined and declared at the startthe op did put DIY ....but expectations ....

author: MadTux
author_rank: Frequent Contributor
timestamp: December 18, 2023, 03:23:33 pm
content: Isn't it that guy again??https://www.eevblog.com/forum/metrology/calibratory-d-105-dc-precision-voltage-reference-standard/Lord, praise thy holy electrons!

author: Majorassburn
author_rank: Regular Contributor
timestamp: December 18, 2023, 09:55:06 pm
content: Quote from: MadTux on December 18, 2023, 03:23:33 pmOH LORD NOOOOO!!!! I'm NOT THAT GUY!!!! PLEEEEZE!

author: Majorassburn
author_rank: Regular Contributor
timestamp: December 28, 2023, 06:31:30 pm
content: Just updated links to my listings in the original post. Thanks & Happy New Year!Major