Products > Test Equipment

TH2830 vs TH2832

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mawyatt:
We have the handheld Tonghui TH2609B tweezers, they work well but are not as good as the dedicated SMD fixtures we've found for repeatability of measurement, even the two no-name SMD fixtures we have (copies of the 120MHz TH26008A) perform better (especially after some internal mods & adjustments).

Awhile back we did a direct evaluation of these no-name fixtures, mainly with our Tonghui TH2830 and Hioki IM3536 LCR meters. The test was simple and designed to verify IF these no-name SMD fixtures could be reliable in measurement. Various quality SMD components were compared between the two instruments with the same fixture transferred, and proper warm up and short/open calibration invoked. During this we discovered the fixtures lacked some internal shielding to the case an corrected such, then found the attachment to the plungers were loose and could introduce measurement variations, these were tightened and all the test repeated. This proved the modified and corrected fixtures were reliable and produced almost identical results between the two instruments with a variety of SMD devices over the frequency range of 50Hz to 100KHz (limits of the TH2830), then went beyond with the IM3536 (4Hz to 8MHz) just to "see" if any anomilities showed up in the measurements, none did.

So we concluded these SMD fixtures were good enough for our use, of course YMMV ;)

Note also verified the handheld DE-5000 did well when using these SDM fixtures (created an adapter for such).

Edit: Also, while on the discussion of fixtures and such, we've found the common Kelvin type clips with the individual cables to BNCs work fine at DC, and very low frequencies (like for use measuring electrolytics), but don't behave well with DUTs that have high impedances (small caps for example) as frequency increases. If you note the quality Kelvin clips like the TH26011CS they only recommend to 100KHz, and the 4 individual Kelvin leads are ~250mm long and come from a box which mechanically terminates each lead into a combined single cable which is the major part of the ~1M length back to a fixture which hosts the 4 BNC connectors. This is more stable mechanically and electrically than the common 4 individual Kelvin leads types with BNCs, especially considering these are usually only a single shield cables which are not 100% effective shielded (here double shielding would be desired, but cost more and less flexible).

For leaded DUTs we've found the TH26048A works well and is speced to 13MHz.

Best,

KungFuJosh:

--- Quote from: mawyatt on July 12, 2023, 05:43:58 pm ---So we concluded these SMD fixtures were good enough for our use, of course YMMV ;)

--- End quote ---
Well, yeah, it's your fault I bought the fixture. 😉


--- Quote ---For leaded DUTs we've found the TH26048A works well and is speced to 13MHz.

--- End quote ---
I like that too. I haven't had any issues with the Th26011CS either.

mawyatt:

--- Quote from: KungFuJosh on July 12, 2023, 06:39:49 pm ---Well, yeah, it's your fault I bought the fixture. 😉

--- End quote ---

Yeah, we generally don't recommend things, usually just state what we have and use and leave it at that!!

However, these inexpensive SMD fixtures work so well (after mods/fixing), even with handhelds like the DE-5000 (with adapter), we wanted others that are on a budget, either hobbiest or small business, to benefit from such with better, more repeatable measurements.

If we had discovered these before we purchased the somewhat expensive (~$180) TH26009B Kelvin tweezers, well we could have saved some $, nothing wrong with them but they aren't used much anymore.

Best,

KungFuJosh:
Calling @tv84 - we have a new toy to play with. 😉

This one has a date of 2021-06-25, and is supposed to be compatible with the newer hardware.

Once again, Sourcetronic customer service wins. They contacted "the firmware developer" who sent them this.

Thanks,
Josh

Martin72:

--- Quote ---They contacted "the firmware developer" who sent them this.
--- End quote ---

A-haaa...

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