The Model 881 is a Frequency Response Analyzer (FRA) designed for Electrochemical Impedance Spectroscopy (EIS) and High Frequency Resistance (HFR) measurements. The 881 integrates with the electronic load used in Scribner’s 840 / 850 / 855 / 890 series of fuel cell test products. It is also available in the 857 Flow Cell Test System.
The 881 FRA and FuelCell® software facilitates continuous, single-frequency High Frequency Resistance and full-frequency range Electrochemical Impedance Spectroscopy analysis of an operating fuel cell. HFR can be performed concurrently with current interrupt (IR drop) measurement for orthogonal determination of the cell internal or ohmic resistance.