Multichannel Systems MEA2100-System Manual - Manual (Page 16)

MEA2100-System Manual
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Click “Stimulus 1” tab page, for example.
Defining the stimulation pulse
In "Output Mode" you can choose whether you want to stimulate in voltage or current mode.
To set up the stimulus pulse or pulse train, please use the eight provided up down boxes.
The individual stimulation pulse is defined in the "Pulse" window. Set up a monophasic pulse by
selecting the voltage / current in mV/μA and the duration time T1 in μs. For setting up a biphasic
pulse you have to select the stimulation strength and time also for the second phase. The shape
of the pulse is displayed immediately in the window below. Once started, a programmed
paradigm will run to its’ end, or till it is manually terminated.
Warning: Anodic (positive) pulses can lead to a formation of titanium oxide on the MEA
electrodes. When using MEA electrodes of TiN material, use only negative voltages pulses
or biphasic current pulses applying the negative phase first. Always regard the safe-charge
injection limits. Otherwise, electrodes can be irreversibly damaged by electrolysis.
When using the "Train" window for setting up a pulse train, please select the "Inter Pulse Interval
IPI" in μs and the number of pulses in the train in "Repeat". If no pulse train is needed, set the IPI
to zero and the “Repeat” to one.
The "Inter Train Interval ITI" function can be used to repeat a single pulse or a pulse train.
The interval time can be set in ms, and also the number of repeats. The complete programmed
paradigm is shown in the graphical display below the stimulus window.
Once started, a programmed paradigm will run to its’ end, or till it is manually terminated.