| Products > Test Equipment |
| Cheap, not Chinese, Voltage reference for DIY meter calibration |
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| tautech:
--- Quote from: luma on June 05, 2024, 07:58:33 pm ---How about https://dmmcheckplus.com/ Solid reference, but the key value is the cheap and fast calibration service in the future. $20 service + $7 shipping (and free for the first two years) makes a solid reference into a damn useable standard for the home gamer. --- End quote --- Certainly one of the best and trusted solutions....and we discussed these at length privately but $ more that Dazz wants to outlay. |
| Martin72:
--- Quote from: luma on June 05, 2024, 07:58:33 pm ---How about https://dmmcheckplus.com/ --- End quote --- I have the device, it's good for a quick check(therefore it´s name) to see if a meter is working. As a reference it is OK for 3.5 digit meters. The LCR option is somewhat sobering. The capacitors and coils are not exact types, but simply measured. But as I said, it's good for testing and comparing. |
| dazz1:
--- Quote from: KungFuJosh on June 05, 2024, 01:48:43 pm --- You're certainly not. There are many threads dedicated to DIY refs, including this one: https://www.eevblog.com/forum/testgear/elektor-voltage-current-calibrator-project/ --- End quote --- I have made Elector stuff years ago and it was always nice but it sounds like their quality control is not so good for this project. I see you spent $USD366 on the Elector calibrator. I note there is a commercial calibrator on that thread that was "only" £350 https://www.ianjohnston.com/index.php/onlineshop/handheld-precision-digital-voltage-source-2-mini-detail Looks good but too many £££ for my budget. --- Quote from: KungFuJosh ---It's not a cheap project (build cost probably still above $500 per unit), and it should get calibrated too. --- End quote --- For that money it would only make sense to get it properly calibrated. --- Quote from: KungFuJosh ---Whether you go the DIY route, or get a premade ref, they all need significant burn-in time for stability. Once they're stable, they're worthy of calibration. --- End quote --- Looking at a few data sheets, it appears that the initial value of voltage references can be quite different to the nominal output voltage. Maybe 1% or so. That would make it fairly essential to get it calibrated. |
| dazz1:
Hi I have just found the LB02A process calibrator which looks promising. https://www.aliexpress.com/i/1005001632714207.html reviewed here: It is Chinese and not lab quality substitute for a good volt reference but its usefulness could compensate for that. The LB06 is the highest priced version. |
| dazz1:
Hi It appears the LTZ1000 was replaced by the ADR1000 that was then replaced by the ADR1001. At about $USD100 definitely not the cheapest solution but maybe the best accessible for a DIY solution. https://www.digikey.co.nz/en/product-highlight/a/analog-devices/adr1001-precision-voltage-reference Marco Reps channel did a ADR1000 reference |
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