When was the last time you calibrated your instrument?
Calibration of your potentiostat is necessary. We recommend an annual calibration for every potentiostat, at minimum. Because of drifts of internal components over time, placement of the instrument in various environments, and slight differences in cable and cell geometry, your potentiostat's measurements may change slightly. For example, you should wait for your instrument to warm up to reduce the impact of thermal drift on calibration. This impact can show up as a larger offset error when measuring a small signal.
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