Chronoamperometry Setup Parameters

Test Identifier

See Test Identifier in the Common Potentiostat Setup Parameters page.

Output File

See Output File in the Common Potentiostat Setup Parameters page.

Electroactive Area

See Electroactive Area in the Common Potentiostat Setup Parameters page.

Area of Overlap

See Area of Overlap in the Common Potentiostat Setup Parameters page.

Notes

See Notes in the Common Potentiostat Setup Parameters page.

Pre-step Delay Time (s)

The Pre-step Delay Time is the time for which a Pre-step Voltage is applied. It is shown as negative time on the real-time display.

Pre-step Voltage (V)

The voltage is typically 0 and the time is usually quite short.

Step 1 Time (s)

The Step 1 Time is the time for which the Step 1 Voltage is applied to the cell. Units are seconds, and the value is greater than zero. The maximum time is based on the Sample Period setting, because the maximum number of points is 32 000.

Step 1 Voltage (V)

The Step 1 Voltage is the first voltage to be applied to the cell. Units are volts and can be versus Reference or versus open-circuit potential. The Step 1 Voltage is applied for the Step 1 Time.

Step 2 Time (s)

The Step 2 Time is the time for which the Step 2 Voltage is applied to the cell. Units are seconds and the value is greater than zero. The maximum time is based on the Sample Period setting, because the maximum number of points is 32000.

Step 2 Voltage (V)

The Step 2 Voltage is the second voltage to be applied to the cell. Units are volts and can be versus Reference or versus open-circuit potential. The Step 2 Voltage is applied for the Step 2 Time.

Sample Period (s)

The Sample Period parameter determines the spacing between data points. The units are seconds. The shortest Sample Period we recommend is 1.0 ms. The longest Sample Period allowed is 600 seconds. For speeds faster than 1.0 ms, the display of the real-time data is delayed. This helps insure that your system is able to keep up with the fast data-acquisition rate.

I/E Range Mode

See I/E Range Mode in the Common Potentiostat Setup Parameters page.

Max Current (mA)

See Max Current in the Common Potentiostat Setup Parameters page.

Limit I (mA/cm2)

The Limit I parameter is used to prevent excessive cell current. If the absolute value of the current exceeds the Limit I, the data acquisition in the current step ends prematurely.

Exceeding the Limit I during the first step causes the experiment to skip to the second step. Exceeding the limit during the second step causes the experiment to terminate.

Sampling Mode defines whether or not the potentiostat oversamples and averages during acquisition. These choices are only available on the Reference™ family instruments.

• Surface results in oversampling followed by averaging according to the Sample Period defined above.
• Noise Reject results in oversampling and averaging during the remaining 20% of a Sample Period.
• Fast results in sampling according to the Sample Period.