Table of contents - Metrohm of contents 1 Table of contents TABLE OF CONTENTS

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  • Table of contents 1

    Table of contents TABLE OF CONTENTS ....................................................................................................................... 1

    1. PRINCIPLES OF OPERATION ...................................................................................................... 5 1.1 PREFACE.............................................................................................................................................. 5 1.2 THE CONCEPT ...................................................................................................................................... 6 2. GETTING STARTED WITH GPES ................................................................................................ 9 2.1 RECORDING A CYCLIC VOLTAMMOGRAM WITH THE DUMMY CELL .................................................... 10 2.2 THE USE OF THE MANUAL CONTROL WINDOW................................................................................... 13 2.3 DATA MANIPULATION OF A CYCLIC VOLTAMMOGRAM. ..................................................................... 14 2.4 CALCULATION OF A CORROSION RATE. .............................................................................................. 17 2.5 NOISE REDUCTION ............................................................................................................................. 19 2.6 DATA ANALYSIS WITH CHRONO-AMPEROMETRY............................................................................... 20 2.7 DATA ANALYSIS WITH DIFFERENTIAL PULSE VOLTAMMETRY. ........................................................... 21 2.8 ANALYSIS OF ELECTRO CHEMICAL NOISE......................................................................................... 22 2.9 IR-COMPENSATION ............................................................................................................................ 23 2.10 DETECTION OF NOISE PROBLEMS ..................................................................................................... 24 3. THE GPES WINDOWS................................................................................................................... 27 3.1 GPES MANAGER WINDOW................................................................................................................ 27

    File menu............................................................................................................................................ 27 Method................................................................................................................................................ 32 Utilities ............................................................................................................................................... 32 Project ................................................................................................................................................ 43 Options ............................................................................................................................................... 51 Window............................................................................................................................................... 52 Help .................................................................................................................................................... 52 Tool bar .............................................................................................................................................. 52

    3.2 STATUS BAR ...................................................................................................................................... 53 3.3 MANUAL CONTROL WINDOW............................................................................................................. 53

    Current range ..................................................................................................................................... 54 Settings ............................................................................................................................................... 54 Potential ............................................................................................................................................. 55 Noise meters ....................................................................................................................................... 55 iR-compensation ................................................................................................................................. 55 Integrator............................................................................................................................................ 56 Filter panel ......................................................................................................................................... 56

    3.4 DATA PRESENTATION WINDOW.......................................................................................................... 56 File...................................................................................................................................................... 57 Copy.................................................................................................................................................... 58 Plot ..................................................................................................................................................... 58 Analysis............................................................................................................................................... 60 Edit data ............................................................................................................................................. 60 Work scan ........................................................................................................................................... 60 Work potential .................................................................................................................................... 60 Editing graphical items and viewing data .......................................................................................... 60

    3.5 EDIT PROCEDURE WINDOW ................................................................................................................ 63 3.6 ANALYSIS RESULTS WINDOW............................................................................................................. 64 4. ANALYSIS OF MEASURED DATA ............................................................................................. 65 4.1 PEAK SEARCH .................................................................................................................................... 65 4.2 CHRONOAMPEROMETRIC PLOT .......................................................................................................... 69 4.3 CHRONOCOULOMETRIC PLOT............................................................................................................. 69 4.4 LINEAR REGRESSION.......................................................................................................................... 69 4.5 INTEGRATE BETWEEN MARKERS........................................................................................................ 70

  • 2 User Manual GPES for Windows Version 4.9

    4.6 WAVE LOG ANALYSIS ........................................................................................................................ 70 4.7 TAFEL SLOPE ANALYSIS..................................................................................................................... 71 4.8 CORROSION RATE .............................................................................................................................. 71 4.9 SPECTRAL NOISE ANALYSIS ............................................................................................................... 73 4.10 FIND MINIMUM AND MAXIMUM ....................................................................................................... 74 4.11 INTERPOLATE .................................................................................................................................. 74 4.12 TRANSITION TIME ANALYSIS............................................................................................................ 74 4.13 FIT AND SIMULATION....................................................................................................................... 74

    The simulation method........................................................................................................................ 75 The fitting method............................................................................................................................... 75 Elements of the Fit and Simulation Window....................................................................................... 76 Fitting and simulation step by step ..................................................................................................... 76 Fitting in more detail .......................................................................................................................... 81 Fit and simulation error messages ..................................................................................................... 84 Descriptions of the models.................................................................................................................. 85

    4.14 CURRENT DENSITY .......................................................................................................................... 95 4.15 WE2 VERSUS WE PLOT..............................................................................................