Products > Test Equipment

East Tester ET3502 LCR-Bridge

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KungFuJosh:

--- Quote from: Martin72 on August 14, 2024, 09:23:46 pm ---It's about time you got the Hioki up and running.

--- End quote ---

lol, I wish. Parts from China. The LCD might be here by Friday, but no idea when the touch panel will show up. Hopefully within the next week. In the meantime, I'm just messing with the front panel. Unfortunately, the sun was spotty today so I don't know if there will be any more improvement there. I'll find out in a couple hours when I check it out.

Martin72:
So I have now ordered the test fixture from Sourcetronic for us.
I'm curious to see what it looks like inside, after all it's almost three times as expensive as mine from Aliexpress.
But that's nothing compared to the R&S model, which looks exactly the same.
They want 1500€ for it.... ;)
The tireless people at ET got in touch again today and explained why the Im/Vm display does not reflect what is really there.
They didn't know that I had finished with it, thanks to the explanation in the ST manual.
I was tempted to torment the poor guys with the question about the Rs(ESR), but left it alone, as I had given myself the answer.
I assume that the devices (ET as well as ST) are no longer able to display the “correct” ESR value with a 10pF capacitor due to their design.
I would be interested to know @Mike whether your much more expensive Hioki does it better.
Determining the ESR (Rs) value for a 10pF capacitor at 100kHz is probably a sporting task.

mawyatt:
@ Martin,

Here you go. Random selected 10pF C0G/NP0 0805 and 0603 chip caps, measured at 100KHz.

Note: Our setup has changed as we've added Power Line Chokes per Hioki recommendation to our IM3536 and TH2830 (actually added to all our instruments individually).

mawyatt:
Here's the Tonghui TH2830.

BTW, these test were quickly done without proper instrument warm up (10 minutes).

Best,

Martin72:
Thank you Mike!
Do you have the data sheets or ESR values for the capacitors used according to the specification?
It would be interesting to see how far they are from the measured values.
I will be measuring values with larger capacitors over the weekend, but with the ET3502.
Because I still need pictures of the running operation, I have put the ET3502 up for sale for a ridiculous 499€ (because of the non-functioning Ethernet).
I am curious when the test fixture from sourcetronic will arrive.
Oh well, as for the specifications (Kelvin clips) I haven't heard back from them yet.... ;)

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