Products > Test Equipment
Tonghui TH2827C LCR meter
mawyatt:
Totally agree with your approach. Getting the most out of this ADI setup will require a stable mechanical and electrical environment, especially considering the 10MHz upper limit.
Would think a custom high quality, low noise PS based around a torroidal transformer within sturdy enclosure allowing the PCB 4 BNCs to directly interface outside, or short quality cables to chassis mount BNCs should be in order. Actually having the chassis mount BNCs is probably better since this removes the risk of PCB damage due to external BNC mishandling.
Personally I like the idea of including a RPi with built in touch display so the final instrument can act stand alone and not "tethered" to a PC, never cared for this and one reason our superb performance Pico 4262 rarely sees service. Awhile back we had considered using a dedicated RPi with touch display to allow direct visual displays of Impedance Plots with our 2 Lab Grade LCR Meters. Sort of a Stand With LCR Meter Box rather than having to create the plots on the controlling tethered PC Laptop (still a project on the back burner).
The GUI can evolve over time into something that might please folks, but the focus on the electrical performance at the beginning, believe is the correct approach.
You can put Lipstick on a Pig, but in the end it's still a Pig ;)
Anyway, seems this ADI device has the ability to produce extremely good results over a wide frequency range in the hands of capable folks like yourself, so we are eagerly awaiting your progress.
As a suggestion maybe start a dedicated thread to this subject?
Best,
macgyver76:
I have been working with the ADMX2001B since last month. I have already made a nice box for it with BNC connectors on the front panel. I am interested in software to control it and calibration procedure. Can you share info? Thank you very much :)
Alberto
zrq:
Ask Analog Device support. They have a nice python script that abstracts communication with the module, the support guy is very helpful and would like to discuss with you on specific needs and bugs. The firmware version 1.3.1 fixed quite some bugs and now the sweeping is finally kind of usable (with manual interpolation of calibration coefficients).
macgyver76:
Work in progress 😎😎
macgyver76:
--- Quote from: Dagobert1 on July 08, 2024, 05:51:26 pm ---Of course, you could also operate the ADMX2001B with a PC using an adapter from USB to RS232. The software can certainly be adapted so that communication can also take place via a virtual COM port. However, I would like to have a stand-alone device in the lab and connect to the device via Ethernet if necessary. As far as operation is concerned, I'm taking the pragmatic route and I've already tried out the possibilities offered by Qt for the main measurement page. I first had to make the calibration page mouse and keyboard operable, because the calibration is rarely needed during normal operation and I absolutely need the calibration data to calculate the measured values. It is also possible that functions such as calibration are only implemented via the web interface. For me, the measurement currently has absolute priority. What the Gui will ultimately look like will emerge over time. I would also like to implement the "Onscreens Numpad" window, I already had the idea. I have tried this in the pictures with the different outputs of measurement types. In the implementation, this is nothing more than an input field realized by buttons. What is actually written on the buttons is irrelevant.
The main task of a measuring device is high-performance and accurate measurement. All these things in the direction of the GUI are implemented quickly and are therefore currently less important. The high-performance communication to the ADMX2001 and especially the calibration is very complex and has already taken me many weeks of work.
--- End quote ---
Dagobert, can you share your software? It should be a good start point for me 😅 thank you very much 🙏
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