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4.3.34 Pot. Low Current CAA potential step induces a current change. Currents down to 200 pA with aresolution of 0.3 pA can be measured on the 10 nA range. The current is recordedwhile the WORK potential is maintained at a pre-set value versus the REFpotential. Information about the diffusion properties of the electrochemical speciesand the kinetics of the process can be obtained. Transient studies require a highsampling rate. Method available with VoltaLab 50 and VoltaLab 80.Consult the Help file, keyword indexes:Pot. Low Current CA - Method editing and Pot. Low Current CA -Measurements and curve files.4.3.35 Run External UtilityThe Run External Utility method is used when you want to send a command (ora set of commands) to a peripheral connected to a RS232 serial output of thePC. This method is useful when you want to start actions automatically during asequence (start or stop stirring, start or stop degassing a cell, renewing a mercurydrop at the WORK electrode, adding reagent to the cell using the ABU901 burette,etc). The peripheral (stirrer, polarographic stand, burette, etc) must be fitted witha RS232 serial port. The communication report (responses received from theperipheral) can be saved in a separate file. Method available with VoltaLab 06,VoltaLab 10, VoltaLab 40, VoltaLab 50 and VoltaLab 80.Consult the Help file, keyword index: Run External Utility - Method editing.4.3.36 Auto. Peak AnalysisThe Auto. Peak Analysis method examines a curve automatically. The curveand peak analysis results can be printed out in real time. The results are savedautomatically in the Results folder of the reprocessed curve (.TXT file). Place theAuto. Peak Analysis in the sequence just after the method for which you wantto search for the curve peak. The Auto. Peak Analysis cannot be set as the firstmethod of the sequence. No more than one peak is determined per method run.As much as possible, use the Auto. Peak Analysis on a 1-peak curve: to do so,an Auto. Traject can be placed between the curve acquisition and the Auto. PeakAnalysis method. If you need to detect a peak versus a data column which does notexist in the curve processed (example: dI column with a Pot. Cyclic Voltammetry),place an Auto. Linear Extraction between the curve acquisition and the Auto.Peak Analysis method. Auto Peak Analysis can be run after all methods exceptimpedance.Consult the Help file, keyword index: Run Auto. Peak Analysis - Method editing.VoltaMaster 4 - Version 7.0x 57Section 4, Chapter 3: Methods available