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<< Click to Display Table of Contents >> Navigation: Experiments > D - Multiplexed DC Corrosion > Techniques > Multiplexed Galvanic Corrosion > Multiplexed Galvanic Corrosion - Experimental Sequence |
Run the Multiplexed Galvanic Corrosion standard technique by selecting Experiment > Multiplexed DC Corrosion > Multiplexed Galvanic Corrosion from the Framework™ menu bar. This initiates the following sequence of events:
1.Framework™ creates a Runner window, and the Multiplexed Galvanic Corrosion.exp script is run in this window.
2.The script creates the Setup dialog box and accepts changes in the experimental parameters. This dialog box allows you to specify the channels to be run, information concerning each channel, and global information about the entire experiment on all channels.
3.The script opens the electrochemical parameters file (SYSTEM.SET) and recovers the electrochemical system characteristics (βs, density , Equiv. Wt.) for each active cell from the file. If the script cannot open the file or find the System Name, the script warns you and then returns you to the Setup dialog box.
4.The script now opens the data file associated with each active Multiplexer channel to see if there are any problems with the composite (base plus channel number) file name.
5.The script now obtains the use of the potentiostat and Multiplexer specified during Setup and opens the data file using the Output name. It initializes the Multiplexer so that all the cells are shorted when inactive. If the potentiostat or Multiplexer are in use or the file cannot be opened, the script returns you to the Setup dialog box. The file header information is written to the data file. This information is written to the file prior to data acquisition. If the experiment is aborted, the file contains only this information. This header information includes:
•Tags identifying possible analyses.
•The current time and date.
•A list of the Setup parameters.
6.If the elapsed time for this experiment is greater than the total experiment time, the script complains and returns to the Setup dialog box.
7.If Conditioning was selected in Setup, the local potentiostats in the Multiplexer condition all the Multiplexer channels. This includes both channels selected for data acquisition and cells that are not selected.
8.The script now switches the Multiplexer to the first selected channel.
9.The script takes a current and voltage measurement on this cell. The system actually records a short current- and voltage-versus-time curve and averages the results. At each point, the voltage and current measurement ranges are automatically switched to the optimal ranges.
10.Steps 8 and 9 are now repeated for every other active channel.
11.When all the channels have been run, the script checks the repeat cycle time and delays if necessary. After this delay it repeats the cycle though the active channels starting with step 8.