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How do I use Analytics Tab time-domain plots in the Pulsenics dashboard?

Create time-domain context plots (DC and derived metrics) to assess stability, spot transitions, and group EIS spectra before frequency-domain analysis.

Goal

Use time-domain plots in Analytics to understand what was happening in your system when each EIS spectrum was collected. This is typically the first step before loading frequency-domain plots.

Why time-domain plots matter

Time-domain plots help you answer:

  • Was the system stable when spectra were taken?

  • When did conditions change (steps, ramps, drift)?

  • Which spectra belong together for comparison?

Before you start

  • You have at least one experiment with EIS data.

  • Know where each signal comes from:

    • DC current is sensed by the Probe.

    • Voltage traces should come from the CMU when using CMUs (unless you are using a single-channel Probe without CMUs).

    • If no CMU is selected, the dashboard may default to the Probe’s BNC voltage sense inputs. If those are not connected, the voltage plot may not be meaningful.

1) Create an Analytics page

You can start Analytics in either of these ways:

Option A: From Analytics

  1. Click Analytics in the left sidebar.

  2. Click Add.

  3. Give the Analytics page a unique name.

Option B: From an Experiment

  1. Open the experiment you want to analyze.

  2. Click Start Analytics.

2) Load experiment data

  1. In the dataset selection area, choose the experiment(s) you want to analyze.

  2. Click Select to load the dataset.

What you should see: the loaded experiment(s) listed with basic experiment details.

Tip: You can load multiple experiments to compare them in the same Analytics page.

3) Open Interactive Plot Configuration

In your Analytics page, find Interactive Plot Configuration. This is where you choose:

  • which experiment you are configuring

  • which Probe data you are viewing

  • which CMU and channel to use (if applicable)

  • which time-domain variables to plot

4) Add a DC current time-domain plot

  1. Under Time Domain Data, select DC current.

  2. Ensure you are not selecting a CMU for current, since current is measured by the Probe.

  3. Click Apply.

What you should see

  • DC current plotted versus time.

  • Markers (often shown as X’s) indicating completed EIS spectra.

5) Overlay voltage and derived electrochemical metrics

You can overlay multiple traces on the same time-domain plot.

Add voltage (typical CMU workflow)

  1. Select your CMU and the correct channel connected to the device under test.

  2. Add the voltage trace and click Apply.

Add derived electrochemical metrics

You can also plot extracted metrics over time (features derived from each EIS spectrum), such as:

  • electrolyte resistance / high-frequency resistance

  • faradaic resistance

  • interfacial capacitance

  • power (if available)

Click Apply to update the plot with the selected traces.

Why this is useful
Overlaying DC current, voltage, and derived metrics helps you spot transitions and interpret why impedance changes over time.

6) Adjust axes and time settings

Open the Axis tab to control how plots are displayed.

Multiple y-axes vs shared y-axis

  • Multiple y-axes: each trace gets its own axis, easier to interpret mixed units.

  • Shared y-axis: all traces share one axis, can be harder to interpret.

Absolute time vs relative time

  • Absolute time: uses real timestamps, useful for matching external logs.

  • Relative time: shows elapsed time from the start of the experiment, useful for comparing experiments on the same timeline.

Narrow the time range

You can truncate the visible time window by:

  • selecting a start and end using the calendar/time picker, or

  • typing the time range directly

This is useful before selecting spectra for deeper analysis.

7) Compare multiple experiments in one time-domain view

If you loaded multiple experiments:

  1. Select which experiment you are configuring in the plot configuration.

  2. Add the same time-domain variable (for example DC current) to each experiment.

  3. Use relative time to align experiments from their start point.

What you should see: both experiments displayed together, making it easier to compare behavior across similar timelines.

8) Show only DC points that correspond to completed EIS spectra

Time-domain plots can include many DC points, not all of which correspond to a completed EIS spectrum.

To show only the DC points associated with completed EIS spectra:

  1. In variable selection, enable Hide points without impedance data.

  2. Re-apply your trace selection.

What you should see: a cleaner plot where points align with completed EIS spectra only.

9) Edit or delete plot lines

In the plot lines or traces list:

  • select a plot line and Delete it if you no longer want it

  • optionally duplicate or further edit plot lines as needed

Verify success

  • You can see DC current trends and identify stable regions and transitions.

  • Voltage is plotted from the correct source (CMU when using CMUs).

  • You can align experiments using relative time.

  • You can clean the view using “Hide points without impedance data” to focus on completed EIS spectra.

Related workflows

  • Monitor incoming data from an ongoing experiment

  • Create frequency-domain plots in Analytics (Bode and Nyquist)

  • Select spectra using markers in time-domain plots (next video)