Products > Test Equipment
Cheap, not Chinese, Voltage reference for DIY meter calibration
BeBuLamar:
Oh you meant a pre built module that uses the AD584 IC. So you could build yourself a module using the AD584 bought from an electronic dealer in Australia. Here in the USA I would buy it from Mouser, Digi Key or RS-Online.
tautech:
--- Quote from: BeBuLamar on June 05, 2024, 10:13:56 am ---Oh you meant a pre built module that uses the AD584 IC. So you could build yourself a module using the AD584 bought from an electronic dealer in Australia. Here in the USA I would buy it from Mouser, Digi Key or RS-Online.
--- End quote ---
:)
Kiwi flag is ours. :P
Not them Aussie rogues. :-DD
BeBuLamar:
Sorry about that. My apology.
KungFuJosh:
--- Quote from: dazz1 on June 05, 2024, 05:39:36 am ---For me, calibration is about confidence, not certification. After reading the thread about actual Chinese voltage reference modules, I wouldn't have confidence in the reference. If I am going to spend $$$ on a reference it should be worth enough to justify a calibration.
--- End quote ---
That's called false confidence. I am not opposed, but without calibration, you don't know what you're looking at. You can monitor stability from a non-certified reference, and that's useful, but it doesn't tell you about the accuracy of what you're using the reference for.
I bought this ref as recommended by another member: https://www.aliexpress.us/item/3256804431053626.html
I've found it to be very stable, and if I am interested in more than monitoring drift, I'll pay for proper certification.
I have a couple other refs I bought from ali, and the worst thing about them was the fake calibration. They were all fairly stable. I think that purple one was the best, but it also got the most use, and that on time leads to stability if it's not a total POS.
--- Quote from: dazz1 on June 05, 2024, 05:39:36 am ---I can't be the only one on the planet that has considered a DIY approach to a voltage reference using off the shelf parts. I am interested to hear the views of others.
--- End quote ---
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/
It's not a cheap project (build cost probably still above $500 per unit), and it should get calibrated too.
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.
luma:
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.
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