PITT - Setup Parameters (page 2)

Description

Second setup page of the Potentiostatic Intermittent Titration Technique experiment. Press OK to continue or Cancel to go back to the first setup page.

Parameter

Description

Units

Initial E

The voltage at which the first pulse is applied. Typically, this value is 5-20 mV vs. Eoc for a charge step and 4.20 V vs. Eref for a discharge step.

volts (V)

Final E

The voltage at which the final pulse is applied. Typically, this value is 4.2 V vs. Eref for a charge step and 3.0 V vs. Eref for a discharge step.

volts (V)

Max Current

Max Current controls the current measurement range if I/E Range is set to Fixed mode. If I/E Range is set to Auto mode, Max Current specifies the maximum expected starting current.

To avoid overloading the instrument (so you can accurately track the total charge passed), set Max Current to a value below the instrument's maximum current capabilities.

Gamry tip bulb

Refer to the potentiostat's Operator's Manual for detailed information on the maximum current limit.

amperes (A)

Step Size

The voltage step increments of the pulse signals. This is always entered as a positive number, even for a discharge step.

Max On Time

Duration of each voltage pulse to be applied.

seconds (s), minutes (min), hours (hr), days (d)

Sample Period On

The spacing between data points during the pulse signals.

seconds (s)

Stop At On 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 On 1 and Stop At On 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 On 2

Rest Time

The duration of each rest phase during the experiment. A typical value is 10–15 minutes.

seconds (s), minutes (min), hours (hr), days (d)

Sample Period Rest

The spacing between data points during the rest periods.

seconds (s)

Stop At Rest

Specify various limits during the rest periods. The limit, if met, causes the experiment to skip to the next step, or stop if there is no subsequent step. See the Stop At On parameters for more details about the limits.

PITT - Setup Parameters (page 2)

PITT - Setup Parameters (page 2)

Description

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