Signal Conditioning

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Random spikes in waveform with use of 9234432

Equipment:

Windows Suraface tablet ans

9234 block with 3-axia lEPE accelerometer from PCB. 

SW: LabView app.

 

Issue

Recently I've observe spikes entering the waveform believe its ESD relatet. But if so how can Improve the setup to avoid such spikes?

 

 

If i sit down while holding the cable (coaxial), thenstanding while holding on to the cable they appear.

Even by holding another cable crossing my sensors . Then standing up seems to make spikes.

 

If I charge my Surface they often apear. Also  from charging with a battey to USB- -C PD output.

 

Once we also got disturbanse form radio com. ( offshore VHF)

Was not tuching neither the Surfac, Ni9234, cables or sensor.

But when sitting at a pipe ( totally dofferent system, 1 meter away  I clearly observed noice entering my waveform.

 

Aslo when connecting the surface to a second screen by HDMI cable.

 

Examples

 

 
tmp_f6960095-48aa-4290-bef3-85485c591bf5.png

 

tmp_932c4f38-4452-4309-abb6-dcb78c055478.png

  

 

Clean signal 

tmp_313e58f0-a0f3-4d03-8370-6c41c3a94daf.png

 

 

Another quick simple labview setup :

 

tmp_299680c4-4ab7-48c9-9187-2782d6ccb9f0.png

 

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Jossi.

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