Products > Test Equipment
Sensitive LCR Meter Measurements
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Martin72:
The ST28006A test fixture arrived today and I'll be taking it home with me at the weekend.
Here are 2 pictures, from the outside the almost 270€ expensive ST version and mine from Aliexpress hardly differ.
But after opening it.... ;)
KungFuJosh:
How do the plastic holders compare in shape?
Martin72:
I'll take direct detail/comparison pictures at the weekend, but what I noticed was that the spring is smoother on the ST fixture.
mawyatt:
You can adjust the spring tension by removing the plunger case and/or the end cap. We prefer more pressure on the DUT for better DUT terminal contact.

Make a shield like the ST version, you can use a Cu plate/foil or just Aluminum L Bracket. Also make sure the 4 BNCs are electrically well connected to the case, and the cover has good electrical connection to the base case thru the 2 screws holding it on.

A little rework and the cheap SMD fixture will be almost as good as the expensive one :-+

Best,
Martin72:
I think I will install some kind of second housing made of sheet brass.
But first I will repeat the measurements on the ST2830/ET3503, i.e. 10p, 100p and 1n, once with my fixture, then with the ST fixture.
Let's see if we can see anything.
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