Load cell data logging

[Rachie5272]

I'm using a load cell to measure some experiments, and need a way to record the force.  I tried using this DAQ from vishay.  The hardware seems decent, but unfortunately the software is unusable proprietary crap.

Can anyone recommend a device with decent software?  I intend to write my own program to use it as part of a lager automated test setup, and store the results in a database.  All I need is a decent open API, preferably something with python compatibility.

I'm currently looking at labjack devices.  It's overkill for what I need, but from the looks of it the software is wonderful, and all open source.  Does anyone have experience with these?

[joeqsmith]

I have the cheapest one they make (U3 HV).  For the price, it's not too bad.  The LabVIEW code works but I advice you if you plan to use it, download it first and have a look.  I'll leave it at that.   I don't think the one I have would be near good enough to directly talk with a load cell but I assume that you are doing all the filters/amps external anyway.

Not a great review but you get some idea what I was doing with it.




   

[Rachie5272]

Great, thanks for the review.

How about the HX711 ADC?  There are lots of cheap modules like this one available.  I only need a single channel, and it's pretty hard to beat the arduino for open source cross compatibility.  Does anyone know how this would compare to labjack, or other data loggers?

[Brutte]

If you just need a record and not the closed loop control then I suggest using a scope that can save csv voltage samples. As for excitation and gain of a strain gauge - that depends on your soldering skills. Any op-amps with low offset voltage temperature coefficient around?