5-26
TMPM5200-2
■
Operation flow chart
The following is the flow chart showing operation in the AC mode.
Approach
Adjust photodiode
position
Image obser vation
•
Settin
ilter and loop
g f
gain
•
Setting reference
Check before approach
Store image
Grab image
Finish obser vation
Set scanning parameters
Adjust cantilever
resonance point
⇒
Adjusting PD
⇒
Tuning
⇒
Star ting approach
⇒
Grabbing
■
Checking b
B
c
M
•
Is the cantilever for the AC mode properly mounted on the cantilever holder?
•
Has coarse approach been executed in such a way that the distance between the
cantilever tip and the specimen surface is 0.3 mm or less?
Z stage position within the approachable range?
where the value depends upon the cantilever used)?
efore an approach
efore performing an approach, make sure that preparation has been
ompleted according to the procedure in Sect. 5.3, “Preparing for
easurement.”
•
Is the
•
Is the SUM value of the AFM amplifier unit as negative as possible (–1.0 V to –9.0 V:
After checking these points, set the indicator selection knob on the AFM amplifier
unit to RMS in the AC mode, and to FMD in the FMD mode.