Disposable Sensor Placement with SmartMind

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  1. Locate the set of 3 cables that are bound together. (see example) You will also need 2 of the large (1 7/8″ x 1 7/8″) disposable sensor pads and 1 of the small (1 7/8″ x 7/8″) disposable sensor pads.  Locate and measure the active location on the scalp where you will be recording from and mark that spot.  Research the 10-20 system of electrode measurement for details on properly locating and marking sensor sites.
  2. Prep the area on the scalp where you will be placing the active electrode.  For the prep, we recommend that you use our sensor scrubbing pad dampened with alcohol.  You will need to gently abrade the skin enough to remove oils and dead skin but not enough to break the skin and cause bleeding or irritation.  Also prep the area behind each earlobe in the same manner.  After completing this prep, it is very important that you thoroughly dry the area where the sensor is to be placed. Use gauze and/or tissue to make sure this area is dry.
  3. Next, detach one of the large sensors from the plastic backing and attach it to the area behind the left ear as shown (see example). It may be necessary to “wrap” the adhesive backing around the back of the ear as shown, but the metal sensor should actually rest on the mastoid bone behind the ear.
    Note: You may also use the smaller sensors in this area if necessary.  However, we’ve found that the larger sensors are less likely to become dislocated with movement and are more  resistant to sweat.
  4. Detach a second of the large sensors from the plastic backing and attach it to the same area behind the right ear.  Again, it may be necessary to “wrap” the adhesive backing around the back of the ear as shown (see example), but the metal sensor should actually rest on the mastoid bone behind the ear.
  5. Detach one of the smaller sensors from its plastic backing and place it on the scalp in the spot measured and marked earlier (see example).  If placing the sensor in the hair, it may be necessary to use a small dollop of 10/20 Paste to assist with the connection.
  6. Attach the Green sensor to the large snap located behind the left ear, the black sensor to the snap located behind the right ear, and the red sensor to the snap on the scalp.   Note:  All three sensors must be connected to both the sensors and to the appropriate cable port on the amplifier.
  7. If performing a Two-channel setup, then you’ll need the second set of 2 cables bound together (see example).  The only difference is that with two channels, you would need to put the ground and reference cables for Channel 1 behind one ear (see example) and the reference sensor for Channel 2 behind the other ear.  Generally, you would also use the Jumper cable to link your Reference cable from Channel 1 and your Reference Cable from Channel 2 together at the end where the cables plug into the amplifier (see example).

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