Multichannel Systems nanoZ manual - Manual (Page 23)

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impedance spectroscopy results in the Probe report can be saved by clicking the
icon or selecting File | Save report from the main menu.
Activation
mode
This mode can be used to increase the charge capacity of all (or a subset of)
electrodes on the selected probe. Activation mode applies a bipolar, variable duty
cycle, constant current square-wave to the electrode, which both lowers the
impedance and increases the charge capacity, two properties that are desirable
for effective electrical stimulation.
With suitable electrodes and appropriate waveform settings, the activation mode
can also be used for in vivo or in vitro microstimulation.
(A) Only the Fixed activation time is implemented in the current software
version, so this setting is currently ignored.
(B) Set the Activating current. Both current settings can be adjusted from -12uA
(electrode negative) to +12uA (electrode positive) in ~100nA steps, by moving
the position of the sliders. The Meter has limited measurement resolution (39mV)
and should be considered approximate, however the calibrated current readings
adjacent to the sliders are accurate to within a few nA. Note that the finer (~1nA)
resolution provided by the DC Electroplate and Manual electroplating modes is
not currently available in Activation mode.
(C) Set the desired activation frequency, the Duty cycle, and the activation
Duration per electrode. The Duty cycle determines the relative time of the two
current phases, where the percentage refers to the first current setting in (B). If
Test Z is checked, the electrode impedances will be measured before and after
electrode activation at the specified test frequency. The Pause setting specifies a
A B
C
D