2. System Description
2.1. General
The figure in the hard copy manual shows the main features of the system.
The top half of the system houses the printer, video monitor and its controls. The lower
half has the sample chuck and the keyboard, by which the sample and data are
manipulated.
2.2. Specifications
Mechanical profilometer
Scanning Stylus: 12.5-micron radius
Zoom Video Microscope 40x to 120x Magnification
5 Angstrom Vertical Resolution
400 Angstrom Horizontal Resolution
Tracking Force - User adjustable 1 to 25 mg
Maximum Sample Dimensions - 16.5 mm thickness, 162 mm diameter
2.3. Data Display
The Alphastep 200 digitizes measurement data and stores it in memory during the
scan. When the scan has been completed, a plot of the scan is displayed along with
pertinent data and information on the scan characteristics. The cursors displayed on the
plot are positioned by the operator to level the plot and/or obtain the desired data.
The figure in the hard copy manual shows what the display looks like.
The following describes the data display as read from top to bottom:
ID#
Optional identifier for sample assigned by the user. Can be up to 7 characters.
Pressing # when the system is NOT in "Enter Mode" (see below) will allow the user
to enter a number. Pressing ENT, PRINT or initiating a scan will terminate the entry.
VERT Total vertical scale on plot in kA or Mm (specified by operator)
L
Profile height at intersection with left cursor.
R
Profile height at intersection with right cursor.
Highlighted Value
Calculated difference between heights at cursors.
Avg
Average profile height between cursors measured relative to the baseline.
