Gima K10 Manuel D'utilisation page 111

14.4 CSM Processes
Step 1: Clean and prepare skin
It's recommended that the skin-electrode impedance should be less than 2k ohm in order to obtain good
signal quality. Before placing the sensors, the user should clean the skin with mild soap, and prepare the
skin to remove the non-conductive layer of the skin by filing off it with the sandpaper on the provided
electrode.
Different skin conditions need different preparations:
Case (1): for the female with make-up
⚫
Smear the cleanser on the skin and wipe out the make-up at first, then wait for its evaporation.
After that, rubbing the skin 2 or 3 times with the sandpaper on the provided electrode, and clean
up the rest substance with cotton or gauze. Lastly, placing the electrodes.
Case (2): for those with oily skin
⚫
Smear the Ethanol on the skin and wipe out the oily substance at first, then wait for its
evaporation. After that, rubbing the skin 2 or 3 times with the sandpaper on the provided
electrode, and clean up the rest substance with cotton or gauze. Lastly, placing the electrodes.
Case (3): for pediatric patient
⚫
Smear the clear water on the skin at first, then clean the skin with cotton or gauze. Lastly placing
the electrodes.
Step 2: Place the electrodes
The placement of three electrodes is shown below. The advanced signal processing technique ensures that
the distance between electrodes can be as close as 2 cm (0.78 in) to get correct CSI value. However, it is
recommended to place the electrodes on the skull area with few muscle fibrils in order to obtain better
signal quality.
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Middle of forehead
Left side of forehead
Mastoid left side