A while back the Cyton was working fine. But now it seens like having a problem showing only railed signals on the OpenBCI Gui.

Please make sure to verify that there is no corrosion on the electrodes, that can lead to railed signals. Cyton for EEG has all pins on the bottom row.

upper pins. Please clarify! I am also getting a railed signal for most of my electrodes in 16 channel.

And half the electrodes seem to give me a decent signal, whereas the other half remain railed - although all have proper contact with my head.

I’ve tried swapping the ear clips between SRB and bias but receiving the same results. However, if I plug the ear clips into different places (e.g. SRB bottom + SRB upper or SRB bottom + bias bottom)

If I first place the headset on my head with earclips, then start the GUI, all channels will be railed from the start.

I have an Ultracortex Mark IV connected to 8 channels which seems to be giving me a signal upon starting in the GUI. It continues to give me a signal when I put the device on my head. It continues pro

What also happens is after awhile the signals become RAILED and the only way to fix this is to turn off the cyton board and turn it back on

If individual channels are railed, you need to adjust those specific electrodes. It's possible wires may be broken, you can check continuity with an ohmmeter.

Thanks a lot again! Only Channel 15-16 coming railed now. What should I check again? )

If I don't turned SRB1 On, I got railed from all data. What should I do the fix it If I correct SRB and BIAS Pins correctly?

I have a Cython + Daisy Board. I want record channel data using Python. However  my data stucks on those voltages. When I use the OpenBCI_GUI and turned on SRB, there is no railed or any problem. 

The reason it took me so long to answer this thread is that I also suddenly started to get railed or distorted signals on all channels at which point I was close to giving up on this product. Today, m

I also saw that the signals were higher at another attempt, up to "RAILED". 

The GUI shows "Railed" when microvolt magnitudes for the channels are off the top end of the scale. In other words, generally it means something wrong with the differential voltage measured

I have my newly arrived Cyton board here, however, two channels are RAILED and two are NEAR RAILED.The channels I'm using (from 1 to 8) is Fp1, Fp2, T3, T4, T5, T6, F7 and F8.

Second Question, sometimes I got railed problem from OpenBCI GUI. 

Update - 45 minutes into a test before it finally Railed on 5!  And I was up, moving around, talking on a phone during the test.  And I did not have the gains reduced at all.

In fact, today I took out all of the comfort plugs and screwed the top electrodes out almost as far as they would go, effectively lowering my headset by 2 cm.  The unit is working WAY better.  It's be

So to speed things along, I reduced the gain.  This has helped a little - I was 20 minutes again before it railed on 9.  What causes the DC Offset to be too high / different from the reference - just