Chapter 8 -- Stability in Potentiostat Mode--Improving Potentiostat Stability
8 - 4
• Add resistance to the counter electrode lead. See Figure 8-3. This change lowers the effective
bandwidth of the control amplifier. As a rule of thumb, the resistor should be selected to give one
volt of drop at the highest current expected in the test being run. For example, if you expect your
highest current to be around 1 mA, you can add a 1 kΩ resistor.
This resistor has little or no effect on the DC accuracy of the potentiostat. It can create problems
in high-speed experiments such as fast CV scans or EIS, which need high bandwidth.
Figure 8-3
Resistor Added for Stability
Red
White
Green
CounterReference
Working
Resistor
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