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MEASUREMENT OPERATION
TMPM5200-2
5-221
•
Drift Control
•
Set Drift Point
You can set the reference points for computing the drift speed. You can specify
up to three points.
t
the oldest of the set reference points.
n
ou can select this item if two or more reference points are set. While Enable
checked, the center point of measurement shifts precisely the
t correction each time measurement is performed.
te
computed by a first order
method.
g frame turns the feedback on or off.
m le radio button, the feedback becomes active. If you click
-V and Focus Curve, keep the Sample radio button on, since
the system switches the feedback between on and off automatically.
•
Tip Retract at abort
If you click on the Abort button in the SPM Parameters window during scanning,
the scanning stops and the tip immediately returns to the initial position. Therefore,
if the specimen is uneven, the tip is likely to touch it. When the Tip Retract at abort
button is checked, the tip first retracts during scanning, and then returns to the initial
position; then tip retract is cancelled. This prevents damages to the tip and speci-
men.
Usually, use the instrument keeping Tip Retract at abort off. If you keep it on
when observing the even specimen, the obtained image may become bright or
dark at the beginning of the next scan due to the creep characteristics of the Z
scanner.
These parameters are set for correcting the drift.
•
Clear Oldest Poin
You can erase
•
Enable Correctio
Y
Correction is
amount of drif
•
Drift Ra
The computed drift speed appears. The drift speed is
approximation based on the least squares
•
Sampling
Selecting the radio button in the Samplin
If you click on the Sa p
on the Hold radio button, the feedback becomes inactive and the Z scanner voltage
is held at the present Z position.
When observing the image, turn the Sample radio button on. When performing
measurements such as I
