Products > Test Equipment
Sensitive LCR Meter Measurements
<< < (6/16) > >>
mawyatt:
After using the Special Fixture with the IM3536 this morning we decided to try the Tonghui TH2830 LCR meter while riding out Tropical Storm Debbie. Here we've copied from post 21 above and added the TH2830 Results with the Special SMD Fixture.

We first did the Special SMD Fixture, then the Standard SMD Fixture. Afterwards we decided to reinstall the Special Fixture, do a quick Zero Cal, and rerun the test DUT Resistors, note the repeatability in the Special SMD Fixture results.

Resistor Value
in Milliohms       Special SMD Fixture  (Repeat see text above)          [number] With TH2830      Standard SMD Fixture     

1                       0.80                           (0.80)      {0.82}     <0.81>      [0.79]                         ~1.23
5                       4.84                           (4.82)      {4.82}     <4.86>      [4.81]                         ~5.45
10                     9.90                           (9.87)      {9.86}      <9.92>     [9.82]                          ~11.98
15                     14.70                         (14.71)     {14.72}    <14.73>   [14.69]                        ~13.29
20                     19.83                         (19.84)     {19.85}    <19.85>   [19.83]                        ~17.84
40                     39.87                         (39.88)     {39.88}    <39.88>   [39.88]                          44.87
50                     49.87                         (49.91)     {49.91}    <49.93>   [49.96]                          48.29
100                   100.21                       (100.23)    {100.21}  <100.27> [100.25]                        99.28
   
"~" indicates some variability in readings
Edit: 4~5 hours later redid the measurements shown as {#} for additional results.
Edit: From <#> post 24 below.

These results hint at the good repeatability with this Special SMD Fixture when using the same LCR Meter for low Z DUTs, but also show good agreement between the different brand quality LCR Meters we have.

Hopefully others can benefit from this interesting concept of keeping the Kelvin Force and Sense connections separate and allowing the SMD DUT conductive (solder) end caps make the Kelvin Connections, seems to work a treat in our case!!

BTW we've been "pinged" about making this Special SMD Fixture available as a kit. A couple possibilities are worth considering, one would use the same repurposed LCR Kelvin Clip Box with Lever Arm BNCs like shown, the other a custom enclosure design which would be an aluminum "U" design like the repurposed LCR Kevin Clip Box and Lever Arm BNCs (important for a quality design). 3D Printed components would be created as needed.

Anyway, let us know if interested.


Argh |O Counsel has advised against this, due to liability :P


Best,



Martin72:

--- Quote from: Martin72 on July 27, 2024, 10:31:16 pm ---I have now written to them and asked for a data sheet, together with an explanation as to why.
The things look so similar, but it may well be that the cables from Sourcetronic do not come from TongHui or are “different” and are manufactured by TongHui for Sourcetronic.
We will know soon.

--- End quote ---

As I didn't get an answer from them either privately or from work, I called them "today".
They are in the process of getting this information, because they don't have it themselves.... ;)
KungFuJosh:
Translation: TongHui definitely made it, and didn't supply good information. 😉
Martin72:
That's how I see it too, because when I brought the name into play, they reacted rather narrow-mindedly. ;)
KungFuJosh:
That's because they have a lot of experience dealing with them. 😉
Navigation
Message Index
Next page
Previous page
There was an error while thanking
Thanking...

Go to full version
Powered by SMFPacks Advanced Attachments Uploader Mod