The 273/273A systems cannot be configured as an open circuit ZRA device. To perform an equivalent experiment with the 273/273A systems, a zero volt (0V) potential must be applied (using the Potentiostatic technique in PowerCORR) between the materials of interest. Thus, the special cable connections required for this technique are:
- Working lead (green) is connected to one of the samples
- Both the Counter (red) and the Reference (white) leads are connected to the other sample
- Reference electrode is not connected
The 0V potential between the two samples results in short-circuit current flow, equivalent to an open-circuit ZRA measurement. Unfortunately, the coupled potential cannot be measured in this configuration, as the reference lead is used to maintain the 0V difference.