Electrochemical Noise Data-acquisition and Data-analysis

The Electrochemical Noise software uses a very simple method to measure noise. Periodically, short blocks of data are acquired using the potentiostat’s internal A/D converter. Current is measured for potentiostatic mode, potential for galvanostatic mode, and both for ZRA mode. You control both the length of the data block and the point density of the block. Typically, each block is 20 seconds long and contains 100 data points.

You also control the time-spacing between blocks, and the total test time. Typical values are one block every 10 minutes for 24 hours.

There are also a number of methods for ECN data-treatment. The Electrochemical Noise system tests use a simple detrended RMS calculation on each data block to get an estimate of the noise-level during the block. This block/mean calculation is repeated periodically to build up the noise-versus-time curve.