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Caution: The standard Interface 1000 calibration calls for an external resistive dummy
cell. Your Interface 1000 was shipped with Universal Dummy Cell 4, which includes a 2 kΩ, 0.05%
accurate resistor. After calibration, please place this dummy cell in a safe place where you can find it if
your unit requires recalibration.
If you do need to recalibrate and you cannot find your calibration cell, you can perform DC Calibration
using a different 2 kΩ resistor. Its power-rating is unimportant. Some performance checks in the calibration
process may fail if the resistors inaccuracy exceeds 0.2% (4 Ω).
We do not recommend AC Calibration with any resistor other than the one on the Universal Dummy Cell
4. The Universal Dummy Cell 4 was designed to separate the working electrode leads from the counter
and reference electrode leads. If you perform AC Calibration without adequate separation between these
leads, you will see phase-shift in your high-frequency EIS data. A stray capacitance of 1.4 across a 2 kΩ
resistor causes a 1° phase shift at 1 MHz.
Potentiostat calibration is only required infrequently. Recalibrate your Interface 1000 under the following
circumstances:
It is at least one year since your last calibration.
Your potentiostat has been serviced.
You notice breaks or discontinuities in the data curves recorded with your system.
The system is being run in an environment that is very different from the previous operating environment.
For example, if the Interface 1000 was calibrated at 15°C and you are now operating it at 30°C, you
should recalibrate.
Chapter 3: Installation--DC Calibration
3 - 10
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