EIS
Electrochemical Impedance Spectroscopy
Performs electrochemical impedance spectroscopy measurements over a specified frequency range with configurable parameters.
The amplitude is defined as the peak value in V or A, depending on the measurement mode (potentiostatic or galvanostatic). The measurement scans from the start frequency up to the highest frequency, then down to the lowest frequency. The start frequency must be lower than the upper frequency and higher than the lower frequency.
At 66 Hz, the spectral density can be adjusted. Above 66 Hz, measurements are taken using the upper points per decade setting. Below 66 Hz, the measurement point density transitions linearly from the upper density to the lower density at the minimum frequency.
To optimize the measurement time per frequency point, you can specify the minimum number of periods to be measured using the number of waves and measurement time parameters. The specified number of waves is always measured as a minimum, but if the measurement duration has not been reached after completing the number of waves, measurements will continue until the specified time is reached. In the low frequency range especially, the minimum number of waves will typically exceed the duration requirement.
Before the actual measurement wave is recorded, one or more prewaves are applied at each frequency point. They are needed both for the current ranging - so the device can select the correct measuring range before recording - and for letting the cell and IM7 settle into a steady state at the new frequency. In a normal experiment in the Zahner Lab, the prewave time equals the measurement time and a single wave is used. Unlike in the GUI, where the prewave cannot be adjusted, the Custom Experiment Builder lets you parametrize the prewave in exactly the same way as the measurement wave.
Zahner Lab Experiments
The primitive of the block is used by the following Zahner Lab experiments:
API
The primitive of the block is also available with the following API:
Python:
zahner_link.meas.EisGenerateJob
Electrochemical Impedance Spectroscopy Table
Performs electrochemical impedance spectroscopy measurements at user-defined frequency points with configurable parameters.
The amplitude is defined as the peak value in V or A, depending on the measurement mode (potentiostatic or galvanostatic). It is recommended to start the frequency table EIS at around 1 kHz, as this allows the IM7 to identify the correct measuring range more quickly. Starting at a lower frequency can significantly increase the time required to acquire the first measurement point.
To optimize the measurement time per frequency point, you can specify the minimum number of periods to be measured using the number of waves and measurement time parameters. The specified number of waves is always measured as a minimum, but if the measurement duration has not been reached after completing the number of waves, measurements will continue until the specified time is reached. In the low frequency range especially, the minimum number of waves will typically exceed the duration requirement.
Zahner Lab Experiments
The primitive of the block is used by the following Zahner Lab experiments:
API
The primitive of the block is also available with the following API:
Galvanostatic EIS constant Voltage Amplitude
Performs electrochemical impedance spectroscopy measurements over a specified frequency range with configurable parameters.
The amplitude is defined as the peak value in V and the potentiostat must be in galvanostatic mode. The measurement scans from the start frequency up to the highest frequency, then down to the lowest frequency. The start frequency must be lower than the upper frequency and higher than the lower frequency.
At 66 Hz, the spectral density can be adjusted. Above 66 Hz, measurements are taken using the upper points per decade setting. Below 66 Hz, the measurement point density transitions linearly from the upper density to the lower density at the minimum frequency.
To optimize the measurement time per frequency point, you can specify the minimum number of periods to be measured using the number of waves and measurement time parameters. The specified number of waves is always measured as a minimum, but if the measurement duration has not been reached after completing the number of waves, measurements will continue until the specified time is reached. In the low frequency range especially, the minimum number of waves will typically exceed the duration requirement.
Zahner Lab Experiments
The primitive of the block is used by the following Zahner Lab experiments:
API
The primitive of the block is also available with the following API:
Galvanostatic EIS constant Voltage Amplitude Table
Performs electrochemical impedance spectroscopy measurements at user-defined frequency points with configurable parameters.
The amplitude is defined as the peak value in V and the potentiostat must be in galvanostatic mode. The measurement scans from the start frequency up to the highest frequency, then down to the lowest frequency. The start frequency must be lower than the upper frequency and higher than the lower frequency.
To optimize the measurement time per frequency point, you can specify the minimum number of periods to be measured using the number of waves and measurement time parameters. The specified number of waves is always measured as a minimum, but if the measurement duration has not been reached after completing the number of waves, measurements will continue until the specified time is reached. In the low frequency range especially, the minimum number of waves will typically exceed the duration requirement.
Zahner Lab Experiments
The primitive of the block is used by the following Zahner Lab experiments:
API
The primitive of the block is also available with the following API: