Hi
Thank you for contacting with Emotiv. I am Kien Tran from Emotiv Customer Support. Could you please follow these steps in order to get good contact quality with EPOC+:
1. Check that all sensor bodies positively click in place into the arm sockets and won’t rotate freely in their sockets. If you find a sensor which does not click in place (especially with a new sensor), try to click it hard in place in one of the sockets in the hydrator unit – this will re-shape a sacrificial layer of plastic which deforms to make the correct quarter-turn lock. You may need to apply a lot of force the first time, but after that the pieces should click in place positively without much effort.
2. Make sure the sensors are well hydrated – better too wet than too dry, especially at first.
3. Sensor connectivity is first and foremost about the reference sensors – the short arms behind and 30 degrees above the ears. These need to be in good contact and well hydrated before anything else can register. Apply gentle but firm pressure to the back of these sensors for at least 5 seconds, release and look for lights turning on within the next 20 seconds or so.
This same process is used to get good contact with any other sensor – so if you have a few black, red, orange or yellow ones, press gently for about 5 sec, release and wait for the lights to improve. The headset will generally work fine with a few sensors missing or with sub-optimal contact.
4. If you are still having trouble getting good contact, try the alternate reference sensor locations. Move the reference sensors from their default location to the ends of the ear tabs just behind the ears – where the rubber comfort pads usually sit. Make sure the reference contacts sit on bare skin on the bony lump just behind the ear flap.
5. Finally, if you have trouble getting the sensors immediately above the ears to work (the sensors on the body of the arm assembly, close to the hinge), try removing the rubber comfort pads (including the sensor housing with the finger tabs). This often alters the balance of the headset tension allowing those sensors to go into contact. This is a problem with fairly flat-sided heads particularly.
Best regards,
Kien Tran
Customer Support team