Try to get data of almost static load of the 9234 module with IEPE sensors

I am train to acquire data of load which should be essentially a function of the square wave loading. The current configuration I have is cDAQ 9234 on LV 8.5 module that I used to start a module of 9233, I had, but after looking for here and that it seemed to me that the 9234, with DC coupling, would allow me to gain the quasi-static load (the load is applied for 2.5 seconds) and not only the load change whenever the load has been applied or removed. So, now I have connected 9234 and I get almost no change in output regardless of whether I got DC or AC coupling selected in MAX. In addition, it always seems to be only to register the initial support change, as before - it's the biggest concern I have.

I had previously configured as a voltage signal and just put across the entrance, which at least made me reasonable support changes when I used the 9233. I expect at least that I would see the same or similar values with the configured 9234 in AC mode. If anyone can shed some light on this I would be very happy.

Here are the technical details of load cell: http://www.dytran.com/img/products/1203V.pdf

I have also attached my code, in which case it might shed some light on the question (please, be gentle - I do not know there is a better way to code this, but I have tried different methods cleaning cycle not properly).

Thanks in advance for any help!

John,

Both the sine part and the exponential decay are indications provide excitement from HQ or using a sensor that uses AC coupling.  Looking at the datasheet that you have linked and the site Web of Dytran, I can't determine if the load cell has any kind of internal coupling of AC.  I would recommend you contact Dytran and explain the behavior that you see a load constant to see if this is expected behaviour or not.  It is possible that the scale is intended primarily for transient or dynamic loading and was not supposed to measure static charges.  Let me know what you hear from Dytran and we can continue to resolve this.

Tags: NI Software

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