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7.2 Checking the Electrode Pins of the Amplifier
Noise in single Electrodes
Starting 60MEA-SG with 12.5 Hz sinus waves you may see the following display:
Channel 66, 67, 68 show a significant higher level of noise, channel 78 is completely in saturation.
That means, there is a problem with the contact pad of the 60MEA-SG and / or the electrode pins
of the amplifier. To test this, turn 60MEA-SGG by 90 degrees (be careful with MEA2100-Systems,
because of the contact pad which is connected to the reference electrode). If the same electrodes
in the MEA layout are affected, the contact of the amplifiers electrode pins are bad, may be the gold
contacts of 60MEA-SG too. In most cases this is a problem of contamination. To repair, clean the contact
pads of 60MEA-SG and electrode pins of the amplifier with a soft tissue or a cotton swab and 100%
pure alcohol. The channels should now display flawless signals (see data display below). If contamination
was not the cause, it may be that the electrode pins are defective. Ground the channels if you do not
need them, or change electrode pins in amplifier. Please read MEA manual for detailed instructions.
MC_Rack data display with flawless signals.
