M88-E01072 7 - 1
7. Calibration
Prior to calibration, the system must be aligned
using the scintillation detector.
Each detector and the associated electronics
are unique. A calibration process is used in con-
junction with standard reference materials to
determine a zero offset for the resolution in
degrees. This value represents the angular dif-
ference between the zero angle of 2-theta and
the zero channel of the PSD. The calibration
program will refine the values and record them
in the Configuration program.
7.1 Positional Calibration
1. Manually open all window slits as wide as
possible.
2. Ensure that the proper Kβ filter is in place.
3. Make sure that no Debye slit is in place.
4. Ensure that the reference material is
mounted (quartz or NIST 1976) in the sam-
ple stage.
5. Set the goniometer to the parameters in
Table 7.1 or Table 7.2 using DIFFRAC
plus
COMMANDER.
NOTE: Do not close DIFFRAC
plus
COM-
MANDER. Instead, minimize the window.
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