Products > Test Equipment
Upgrade from a DER DE-5000 LCR meter
KungFuJosh:
--- Quote from: tszaboo on November 11, 2024, 01:26:35 pm ---I was just wondering if anyone is doing something like measuring ultrasonic transducers, component development or some physical measurements. I don't find them particularly interesting for component measurements, because all the components I use have to have their characteristics defined by datasheet.
And when I pick it up it's to measure a cable inductance or some other parameters that are undefined.
I understand why you would need it for component development.
--- End quote ---
I like to confirm what's on those datasheets, but IIRC, you're working on too large a scale to spend time on that, right?
tszaboo:
--- Quote from: KungFuJosh on November 11, 2024, 05:43:03 pm ---
--- Quote from: tszaboo on November 11, 2024, 01:26:35 pm ---I was just wondering if anyone is doing something like measuring ultrasonic transducers, component development or some physical measurements. I don't find them particularly interesting for component measurements, because all the components I use have to have their characteristics defined by datasheet.
And when I pick it up it's to measure a cable inductance or some other parameters that are undefined.
I understand why you would need it for component development.
--- End quote ---
I like to confirm what's on those datasheets, but IIRC, you're working on too large a scale to spend time on that, right?
--- End quote ---
Not really because of that. I buy most passives from Europe, from reliable suppliers. For that ATEX certification (Hazloc is the US equivalent), we need full traceability for the parts. And the design needs to be safe and work with worst case conditions that are defined in the datasheet, or the de-rating is defined in standards. I cannot even have too much inductance and capacitance to begin with.
mawyatt:
--- Quote from: Giallograle on November 11, 2024, 02:23:58 am ---@KungFuJosh Yes, that's $95, around retail price here, plus I'll have to pay (expected) 7% Vat on import here. So I can order you a set and post them - looks like it may be around $17 tracked.
Actually I think I can get them for a little less today, it's the last day of the Chinese 11/11 sales, so they'd come in at a shade over $100 delivered.
This is coming from China, to Superbuy who check it looks like what it's supposed to be, consolidate it with a bunch of other stuff and ship it to me in Thailand.
PM me early today if that's of interest. And anyone else who's contributed to this thread.
--- End quote ---
Be certain these are actual Tonghui TH26009B Tweezers, there are some "clones" around that look the same and may even say Tonghui with Logo. Same goes for some other Tonghui LCR Fixtures, there are a number of fakes out there.
Also Tonghui told us a few years ago, they don't authorize any AliX sellers and we should only buy from Authorized Dealers otherwise they will not honor any warranty claims.
Best
KungFuJosh:
--- Quote from: tszaboo on November 11, 2024, 07:39:53 pm ---Not really because of that. I buy most passives from Europe, from reliable suppliers. For that ATEX certification (Hazloc is the US equivalent), we need full traceability for the parts. And the design needs to be safe and work with worst case conditions that are defined in the datasheet, or the de-rating is defined in standards. I cannot even have too much inductance and capacitance to begin with.
--- End quote ---
I suppose if you're reading every datasheet for every part, that helps. I buy only from reputable sources, but sometimes they have errors on their websites. Like when Mouser said a 10nH inductor was 100uH. Testing the part with an LCR showed me the problem.
Had I also read the datasheet with the part number, I would have found that out instead of trusting their website values to be correct for basic info. To me, that's annoying because those datasheets are usually for 50 parts each, and you have to search for the specific model number through the list...and then I'd still verify with an LCR. 😉
Giallograle:
@mawyatt I should have clarified, this is from Taobao China, where most of the Chinese manufacturers have shops, for delivery in China.
You can get the TH26009B SMD tweezers from Tonghui or most other electronics shops at these prices. I got a small saving by shopping around and virtue of the 11/11 sale.
ETA www.tw-eta.com who make a wide variety of test leads offer SMD tweezers ETA2206E (1MHz, $55) and an SMD test fixture ETA2217 (30MHz, $70) similar to the TH26008A. ETA emailed to say they aren't as capable as Tonghui's versions so I ordered the ETA2217 SMD test fitting, along with a few other bits and pieces from ETA, and the TH26009B SMD tweezers.
Btw I also found Tonghui's 'Handheld bridge test lead' TH26027AS Kelvin clips with a plug to fit the DER-5000; not expensive and easier than making one.
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