Discharge Profile - Setup Parameters (page 2)

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Discharge Profile - Setup Parameters (page 2)

Description

Second setup page of the Discharge Profile experiment. Press OK to continue or Cancel to go back to the first setup page.

 

G - PWR Discharge Profile - page 2

 

Parameter

Description

Units

Signal Profile

Applied current profile defined within a separate text file (*.txt). The file contains a single column of values which ArrayToVector loads into Framework. The values describe the current magnitude of each applied data point. The units are amperes (A), see example file below.

 

Gamry tip bulb

This file can be renamed and modified by the user to define the applied current profile. The *.txt file must be stored within the My Gamry Data directory.

 

Gamry tip bulb

Do not add a header or column label.

Do not add a time column. Time intervals are evaluated at the script level and determined by the Sample Period.

 

G - PWR Discharge Profile - file

 

Sample Period

The spacing between data points. The shortest Sample Period we recommend is 0.5 s (50 ms). The longest Sample Period allowed is 715 s for Reference potentiostats and 750 s for Interface potentiostats.

 

Use Sample Period to determine the Number of Points in the data curve as follows:

 

 

The Number of Points must be less than 262 143 (218 - 1). If you have more points, the experiment aborts just before the data acquisition phase of the sequence. The resolution in the Total Time is controlled by the Sample Period. Times that are not integer multiples of the Sample Period are rounded down. For example, if the Sample Period is set for 8 seconds, and a Total Time of 900 seconds is requested, the actual Total Time will be 896 seconds, which is 112 Sample Periods.

seconds (s)

Stop At 1

Specify various limits to an experiment. Choose a limit criterion from the drop-down list and enter a limit value. The unit automatically updates according to the criterion. The limit, if met, causes the experiment to skip to the next step, or stop if there is no subsequent step.

 

Most experiments have Stop At 1 and Stop At 2 criteria. These parameters are treated equally, and if both are used, they are both tested on every raw data point. If either limit is reached, the experiment skips to the next step or stops entirely.

 

Gamry tip bulb

Different experiments allow different tests, but the principles that govern their behavior are the same.

 

The available stop tests are:

•None

oNo stop test is specified. The experiment runs until the maximum specified time is reached.

 

•Voltage

oVoltage < Limit

Stop if the measured voltage is less than the value entered in volts (V).

oVoltage > Limit

Stop if the measured voltage is greater than the value entered in volts (V).

o|Voltage| < Limit

Stop if the absolute value of the measured voltage is less than the value entered in volts (V).

o|Voltage| > Limit

Stop if the absolute value of the measured voltage is greater than the value entered in volts (V).

o|dV/dT| < Limit

Stop if the absolute value of the measured voltage change rate is less than the value entered in V/s.

o|dV/dT| > Limit

Stop if the absolute value of the measured voltage change rate is greater than the value entered in V/s.

 

•Current

oCurrent < Limit

Stop if the measured current is less than the value entered in amperes (A).

oCurrent > Limit

Stop if the measured current is less than the value entered in amperes (A).

o|Current| < Limit

Stop if the absolute value of the measured current is less than the value entered in amperes (A).

o|Current| > Limit

Stop if the absolute value of the measured current is greater than the value entered in amperes (A).

o|dI/dT| < Limit

Stop if the absolute value of the measured current rate of change is less than the value entered in A/s.

o|dI/dT| > Limit

Stop if the absolute value of the measured current rate of change is greater than the value entered in A/s.

 

•Temperature

oTemp > Limit

Stop if the measured temperature is greater than the value entered in degree Celsius (°C).

o|dTemp/dt| > Limit

Stop if the absolute value of the measured temperature change is greater than the value entered in °C/min.

 

•Charge and Energy

o|Charge| > Limit

Stop if the absolute value of accumulated charge is greater than the value entered in A-hr.

o|Energy| > Limit

Stop if the absolute value of transferred energy is greater than the value entered in joules (J).

 

Stop At 2

 

Related Topics

Discharge Profile - setup page 1