Optics11 CHIARO NANOINDENTER, User Manual, Page: 27 / 65

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Figure 21: Configure displacement, load and indentation profile
P-mode
The P-mode of operation allows you to set a specific load, which can be kept constant over a certain
time interval. For this, the probe needs to be in contact with the sample. A velocity limited
approach of sample surface sensing monitors the threshold of 10 nm cantilever bending when
touching the surface. The piezo starts to receive a new feedback signal from the sample, which
feeds the piezo in order to keep the intended load constant. The P-mode of operation is therefore
in a closed loop with the sample.
In order to set a load profile, you need to switch to
‘Load control’ in the ‘Mode Selection’ part of the
main software window. Af ter that, you can enter the ‘Configure Profile’ window by clicking the
‘Profile’ button. The load profile with three default segments can now be adjusted, according to the
desired load (µN) and time (s) (Figure 21).