PARSTAT MC Hardware Manual
PARSTAT MC Hardware Manual 16
Figure 6. Two-Electrode Connection
b) General aqueous electrochemistry, corrosion experiments and most EIS experiments are connected
using a three-terminal connection (Figure 7). The voltage at the working-sense is controlled relative to a
stable reference electrode positioned in close proximity to the working electrode.
Figure 7. Three-Electrode Connection
c) There are some applications for which a four-terminal (Figure 8) connection is required. In this case, the
sense electrode serves as a second reference electrode, useful for controlling the potential between the
reference and sense (for instance, in controlling the potential across a membrane in a H-cell setup).
Note: Running experiments in this mode requires that the Electrometer Mode setting in the software be set
to Differential for the correct potential to be applied and read.
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