GITT - Setup Parameters (page 1)

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GITT - Setup Parameters (page 1)

Description

First setup page of the Galvanostatic Intermittent Titration Technique experiment. Press OK to continue to the second setup page.

 

E - PWR GITT - page 1

 

Parameter

Description

Units

Pstat

Select the potentiostat/galvanostat to perform the experiment. Each radio button corresponds to an installed potentiostat. You can select only one potentiostat at a time. Potentiostats that are already in use are marked with an asterisk. They can be selected but cannot be used.

 

Test Identifier

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 to 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 the most common punctuation characters including spaces are valid.

 

Output Filename

The name of the file in which the output data are written. By default, it is saved in the default file directory.

 

The input can be a simple file name with no path information. In this case the output file is located in the default file directory. The default file directory is specified in the Gamry.INI file under the [Framework] section with a Key named DataDir. The default path can be changed using the Path command in the Options menu. It can also include path information, such as C:\MY GAMRY DATA\YOURDATA.DTA. In this example, the data are written to the YOURDATA.DTA file in the MY GAMRY DATA directory on drive C. The default value of the Output File parameter is an abbreviation of the technique name with a *.DTA filename extension. We recommend that you use a *.DTA file name extension for your data file names. The data analysis package assumes that all data files have *.DTA extensions.

 

If the script is unable to open the file, an error message box, Unable to Open File, is generated. Common causes for this type of problem include:

•Invalid file name.

•The file is already open under a different Windows® application.

•The disk is full.

 

After you click the OK button in the error box, the script returns to the Setup where you can re-enter the file name.

 

Notes...

Enter several lines of text that describe the experiment. A typical use of Notes is to record the experimental conditions for a data set.

 

Notes defaults to an empty string and is limited to 400 characters. It can include all printable characters including numbers, upper- and lower-case letters, and the most common punctuation including spaces. Tab characters are not allowed in the Notes string. Press the Notes button on the right-hand side to open a separate Notes dialog box.

 

Capacity

Specify the battery's capacity, i.e., the amount of charge needed to charge or discharge a battery. This value is not used during the experimental phase, but rather during the analysis, where a percent capacity graph can be displayed.

ampere-hours (A-hr)

Cell Type

Specify the experiments' cell type, selectable for all instruments:

 

When the cell type is a half-cell, the instrument measures the voltage between the working sense lead (blue) and the reference lead (white). This is the normal electrometer configuration. The maximum measurable voltage in Half Cell mode varies by instrument.

 

Gamry tip bulb

Please refer to your instrument's Operator's Manuals for the electrometer specifications.

 

Full Cell mode is generally used to test a single-cell device. The test assumes a two-electrode cell.

 

Gamry tip bulb

The cable setup in Full Cell mode depends on the instrument. Activate Cable Check to verify the correct cabling for your instrument.

 

For most instruments, 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 software displays an error message if the Working Lead parameter is set to Negative. Connect the potentiostat’s counter sense lead (orange) to the cell cable’s ground lead (black).

 

Gamry tip bulb

For Interface 5000 instruments, the counter sense lead (orange) is connected to the negative terminal of the cell. The reference lead (white) is connected to the cell cable's ground lead (black).

 

This mode is only used for the Interface 5000 dual-electrometer mode. It measures the voltage difference between the reference lead (white) and both sense leads (blue and orange).

 

Working Lead

Specify how the potentiostat is connected to the electrochemical cell.

 

Select Positive when the working lead (green) is connected to the positive electrode (discharge cathode) of the electrochemical cell. Select Negative when the working lead (green) is connected to the negative electrode (discharge anode) of the electrochemical cell.

 

Gamry tip bulb

We generally recommend using the Positive option.

 

Expected Max V

The maximum expected voltage which 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 extra time to the experiment.

volts (V)

Cable Check

Click this checkbox to display a confirmation dialog box before the experiment begins, allowing you verify that the cable connections are correctly configured for the chosen Cell Type.

 

Cable Check - Full Cell
       
Cable Check - Half Cell

 

 

Related Topics

GITT - setup page 2