Part 18: Impedance-Time (IMPT)

The impedance-time method holds the base potential at the initial potential. A sine wave is superimposed on the base potential. Current and voltage are sampled and analyzed for real and imaginary impedance components. The impedance is recorded as a function of time. The following figure shows the applied potential waveform as a function of time.

Fig. 18-1 Potential waveform of the impedance-time method.
Fig. 18-1 Potential waveform of the impedance-time method.


Fig. 18-2 Typical impedance-time plot.
Fig. 18-2 Typical impedance-time plot.

-Types of data that can be plotted

  1. LogZ - t
  2. phase - t
  3. Z - t
  4. Z' - t
  5. Z" - t
  6. log(Z" & Z') - t
  7. logY - t
  8. Y - t
  9. Y' - t
  10. Y" - t
  11. log(Y' & Y") - t
  12. Rs - t
  13. Os - t
  14. Rp - t
  15. Cp - t
last modified 2022/10/12