Replacing spiky with 5mm comb electrodes on ultracortex mark IV

mkcyeung

Hi,
I just got the ultracortex mark IV and some dry comb electrodes. How can I replace the default spiky electrodes with the comb ones? Thank you!
Michael

wjcroft

They just unscrew. On the front of the electrode holder is a screw head. On the back, a 'wire nut' which doubles as the connection point. Do NOT put any stress on the wire itself (twist / bend / etc), use your fingers or a tool to hold onto the nut faces.

gkumar

Hi,

I recently purchased an Ultracortex "Mark IV" EEG Headset pro assembled and dry 5mm comb electrodes. I want to replace the preinstalled spiky electrodes with the dry comb electrodes. Do you have any step-by-step document or video on how I can do it? I don't find any documentation and am unsure how to do it without damaging the preinstalled spiky electrode wires. In another post, some one asked the same question, but I am unsure how to do it by reading the response. I will appreciate it if you could please help me with this.

Thanks.
Gautam

wjcroft

Hi @gkumar,

I merged your new thread on the same subject, into this existing thread.

What is unclear about:

@wjcroft said:
They just unscrew. On the front of the electrode holder is a bolt head. On the back, a 'wire nut' which doubles as the connection point. Do NOT put any stress on the wire itself (twist / bend / etc), use your fingers or a tool to hold onto the nut faces.

You say:

@gkumar said:
... am unsure how to do it without damaging the preinstalled spiky electrode wires.

You use a screwdriver and a small tool called needlenose pliers or any small jawed pliers. You can unplug the wire from the electrode first if you want, but not needed. Grasp the 'wire-nut' at the rear with the pliers. This does not need to turn. It's possible that you may not need the pliers if the bolt is not that tight. Your finger pressure on the nut may be enough.

Then use the screwdriver on the front in a counter-clockwise direction to unthread the bolt / head from the nut. Once the nut is off, the bolt will pull out the front, releasing the old electrode. Now just reverse steps.

William