|Default button||Restores all the parameters on the screen to their default values. Use it to fix typing errors or find out previous values for a parameter you have already retyped. The default values are the values as specified by the Explain™ script. All of the standard scripts perform an automatic restore of the last used values. These are the values first shown to the user. In order to get to the values specified by the script, use the Default button.|
Save the current parameter set on your disk. This is very useful when you are running repetitive tests. Parameter sets are stored in a file with a .SET file-name extension. More than one parameter set can be stored in each file, with the set distinguished by aSet Name. This system is a powerful tool for organizing your experimental setups. For example, each worker in a lab can have his own setup file (JOE.SET, KAREN.SET, etc.). Within her file, Karen can save multiple parameter sets under descriptive Set Names (C1010 Noise, Fast Noise, etc.).
Clicking Save opens a dialog box which requests the name of the file where you wish to save the parameter set, and the Set Name within in the file. Once you are satisfied with the names, clicking the OK button saves the set in the specified file.
|Restore button||Recovers a parameter set from your disk. This is useful when you are running repetitive tests. Clicking Restore opens a dialog box which requests the name of the file where your parameter set has been saved, and the Set Name within the file. Once you are satisfied with the names, clicking the OK button recalls the set from the specified file.|
|Pstat||Selects the potentiostat/galvanostat/ZRA to perform the experiment. Each labeled radio button corresponds to an installed potentiostat. When you choose a potentiostat, its corresponding radio button is filled in. In a multiple-potentiostat system, you can change the potentiostat selection by clicking on a Pstat’s radio button using the mouse. From the keyboard, tab down until a dotted line appears around one of the Pstat labels, then hit the space bar to select among the potentiostats. Only one potentiostat can be selected at a time, so selecting one potentiostat de-selects another one.|
A string that is used as a name. It is written to the data file, so it can be used to identify the data in database or data manipulation programs.
The Identifier string defaults a name derived from the technique's name. While this makes an acceptable curve label, it does not generate a unique descriptive label for a data set. The Identifier string is limited to 80 characters. It can include almost any normally printable character. Numbers, upper- and lower-case letters, and most normal punctuation characters including spaces are valid.
Enter several lines of text that describe the experiment. A typical use of Notes is to record the experimental conditions for a data set.
You can edit the notes in either place.
Notes defaults to an empty string. The Notes string is limited to 400 characters. It can include all printable characters including numbers, upper- and lower-case letters, and the most normal punctuation including spaces. tab characters are not allowed in the Notes string. You can divide your Notes into lines using enter.
The pathname of the file in which the output data are written. It can be a simple filename with no path information, where the output file is located in the default data directory. The default data directory is specified in the Gamry.INI file under the [Framework] section with a Key named DataDir. This default pathname can be changed using the Path command under the Options menu. It can also include path information, such as C:\DATA\YOURDATA.DTA. In this example, the data are written to the YOURDATA.DTA file in the DATA directory on drive C.
The default value of the Output Filename parameter is an abbreviation of the technique name with a .DTA filename extension. We recommend that you use a .DTA filename extension for your data filenames. The data-analysis package assumes that all data files have .DTA extensions.
NOTE: The software does not automatically append the .DTA filename extension. You must add it yourself.
After you click the OK button in the error box, the script returns to the Setup box where you can enter a new filename.
|Capacity||Specifies the capacity—the amount of charge needed to charge or discharge a battery—to be recorded. This value is not used during the experimental phase, but rather during the analysis where a percent capacity graph can be displayed. The units for this parameter are ampere-hours (Ah).|
|IR Measure checkbox||Determines whether or not the instrument performs IR measurements during the experiment. When performing an IR measurement, the flow of current is interrupted and the uncompensated resistance is determined based on the corresponding drop in the voltage measurement. Do not use this measurement with fast sample periods. As a general rule, any sample period faster than 1 second is too fast for IR measurement. The IR value is stored in a Vu column in the raw data file.|
When the cell type is half-cell, the instrument measures the voltage between the working sense lead (blue) and the reference lead (white). This is the normal electrometer. The maximum measurable voltage in half-cell mode varies by instrument. See the manual for your instrument and the specifications for the electrometer.
Full Cell mode is generally used to test a single-cell electrochemical device. The test assumes a two-electrode cell. The positive terminal of the cell is connected to the potentiostat’s working (green) and working sense (blue) leads. The negative terminal of the device is connected to the potentiostat’s counter (red) and reference (white) leads. The Electrochemical Energy software displays an error message if the Working Lead parameter is set to Negative. Connect the potentiostat’s counter sense (orange) lead to the cell cable’s ground (black) lead.
Specifies how the potentiostat is connected to the electrochemical cell.
When the working lead (green) is connected to the positive electrode (discharge cathode) of the electrochemical cell, select thePositive radio button for this parameter. When the working lead is connected to the negative electrode (discharge anode) of the electrochemical cell, select the Negative radio button for this parameter.
In general, we recommend Positive.
|Expected Max V||
Sets the initial voltage-measurement range and voltage offset of the galvanostat. If necessary, the voltage measurement range is adjusted during the signal-optimization phase, but this adds additional time to the experiment.
|Cable Check checkbox||
If you activated this checkbox, the software warns you to confirm that your cable connections are appropriate for the selected Cell Type.
|Voltage||The constant voltage applied to the cell for the duration of the experiment.|
|I/E Range Mode||
The autorange state of the I/E converter. If you choose the Auto radio button, the I/E Range is able to freely adjust based on measured currents. If you click the Fixed radio button, the I/E Range is fixed on a range which is able to measure the current entered in the Max Current parameter. This setting prevents an instantaneous overload in the current measurement as the I/E Range resistor is switched.
Controls the current measurement range when the I/E Range Mode is Fixed. When the I/E Range Mode is Autorange, Max Current specifies the maximum expected starting current. Enter a Max Current value that is the largest current that you expect to see during the scans. From this information the software sets the current range used in the experiment. In order to use the most sensitive range that will not overload, the software chooses the current range based on a value that is 89% of the full-scale current range. For example, when using an Interface 1000E, if a Max Current of 89 mA is input, the current range is 100 mA. On the other hand, if you enter a Max Current of 90 mA, the 1000 mA current range is selected.
If your current data look very choppy and steppy, the problem could be a poorly-selected current range. If you enter a Max Current value of 10 mA and the maximum current in your sweeps is only 100 mA, you are only using 1/100th of the potentiostat's A/D converter range. The result is significant quantization error. Rerun the test entering a smaller Max Current in Setup. If your current data show perfectly flat, horizontal regions, the current has most likely overloaded the potentiostat's current-measurement circuits. Check that the value that you entered for the Max Current parameter is larger that the actual measured cell current. Try rerunning the test with a larger value for the Max Current
Minimum ESR helps to set the appropriate current (I/E) ranges.
Specifies the maximum amount of time to maintain the constant applied potential. The first field specifies the value. The value entered is based on the following drop-down list:
The spacing between output data points. The units used for the Sample Period are seconds.
The shortest Sample Period we recommend is 50.0 ms (0.05 s). The longest Sample Period allowed is 715 s (Reference models) or 750 s (Interface models). The number of data points must be less than 262143 (218 – 1).