Multichannel Systems USB-MEA32-STIM4 Manual - Manual (Page 39)

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6 Troubleshooting
6.1 Troubleshooting
The following hints are provided to solve special problems that have been reported by users.
Most problems occur seldom and only under specific circumstances. Please check the mentioned
possible causes carefully when you have any trouble with the product. In most cases, it is only
a minor problem that can be easily avoided or solved.
If the problem persists, please contact your local retailer. The highly qualified staff will be glad
to help you. Please inform your local retailer as well, if other problems that are not mentioned
in this documentation occur, even if you have solved the problem on your own. This helps other
users, and it helps MCS to optimize the instrument and the documentation. Please pay attention
to the safety and service information in the separate manuals of the related products and in the
software help. Multi Channel Systems has put all effort into making the product fully stable
and reliable, but like all high-performance products, it has to be handled with care.
6.2 Overall Noise
Problem: High frequency noise (50 Hz)
Possible causes:
? Perfusion is not properly grounded. Ground PH01 and aspiration needle to the ground plugs
of the system.
? If using a CVP, include a metal part in the tubing to the CVP and ground it.
? Noisy equipment is too close by, for example the binocular lamp. Cover the pMEA with
aluminum foil and connect the foil to the system ground. Remove or shut down unneeded
equipment.
Problem: Low frequency noise
Possible causes:
The USB-MEA32-STIM4 has a wide filter bandwidth (0.5 Hz to 3 kHz). Therefore, it is likely
that you will pick up low frequency noise. Use a virtual 10 Hz High Pass filter, please see
MC_Rack manual for details.