Expected Impedance range with Ultracortex + Cyton [resolved]
I just assembled my Mark 4 (which I ended up printing in ABS as one piece and glue the inserts in and turned out quite well). Now I'm having some trouble with the signal quality. I've seen some recent posts with similar problems, jet couldn’t solve my issues. My channels are FPz, FZ, PZ, C3, CP1, CZ, CP2 and C4. While measuring the impedance in the OpenBCIGui I got 150K,5150K,74K,2600K,4700K,3500K4550K and 2600K which are all a lot more than the okay range of 40-50K. I measured all the values separately. Screenshot of the signal with Eye-Blinks and jaw muscle artefacts see below. Fixing the cables in place helped a lot improving signal quality and at least the artefacts are clearly visible, but the impedances seems a bit concerningly high to me. I’m not jet very experienced with EEG, it might be obvious what to do. Also is it right to connect one ear clip to BIAS and the other to SRB (on cyton)?
Does anyone know what I could do to fix this issue? I have rather dense hair but it's not to long atm. And my Hardware is brand new.
Aside that, is there a way of changing the preset electrode configuration to the one mentioned above?
Any suggestions are appreciated!