Multichannel Systems MEA_Signal_Generator Manual - Manual (Page 19)

MEA Signal Generator
15
6.2 Checking the Electrode Pins of the Amplifier
Noise in single Electrodes
Starting MEA-SG with 12.5 Hz sinus waves you may see the following display:
Channel 66, 67, 68 show an significant higher level of noise, channel 78 is completely in
saturation. That means, there is a problem with the contact pad of MEA-SG and / or the electrode
pins of the amplifier. To test this, turn MEA-SG by 90 degrees. 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 MEA-SG too. In most cases this is a problem of contamination. To repair, clean the gold
contacts of MEA-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.