Artefact in recordings

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vilsy's picture
Artefact in recordings

Hi guys,
I have recently started having a problem while recording in VC mode on my Multiclamp 700B. I am getting an artefact no matter what i do. The moment i enter the electrode in the solution there is a slight blip @ 1Hz. I have made sure that there is no junction potential and have connected and disconnected all the wires. No idea what to do.
Can you suggest something.