Optics11 CHIARO NANOINDENTER, User Manual, Page: 28 / 65

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I-mode
Operating in I-mode gives you the possibility to set an exact indentation depth. Like in the
previously discussed P-mode, the piezo stroke is being permanently updated by a feedback signal
from the cantilever after getting into surface contact. Using this feedback signal, the piezo adjusts
continuously to control the sample indentation depth.
Before setting the indentation profile, you have to change the mode of operation to ‘Indentation
control’ in the home screen of the software. By pressing the ‘Profile’ button you enter the
indentation profile, where you now can define an exact indentation depth (µm) over a specific time
interval (s) divided by default in three segments (Figure 21).
3.5 Dynamic mechanical analysis - DMA
The Piuma Nanoindenter features, beside the quasi static operation, a dynamic operational mode.
This DMA mode allows mechanical oscillations in all three modes of operation while indenting in a
sample and can be switched ‘On’ in the DMA tab of the corresponding pro file menu. Oscillation
parameters like frequency, periods, amplitude, and relaxation time are freely adjustable to provide
a flexible measurement design (Figure 22).
Figure 22: Configure displacement DMA profile