F. Customer Acceptance Test Protocol
DOC-M88-EXX157_V17_04.2019 75 / 96
Part II: Angular Accuracy, Instrument Response and Resolution (D8 Series)
Anode: Co Bragg-Brentano Geometry
Angular Accuracy: Difference Reference Position corr Instrument Resolution
Maximum allowed 2θ deviation depends on height FWHM
obs
< FWHM
max
2θ
obs
[°]
Difference 2θ
obs
Reference
Position
corr
Difference
Reference
Position
corr
2θ
exp
1)
[°]
FWHM
obs
[°]
FWHM
max
2)
[°]
29.786
41.049
81.247
118.142
Reference Position corr
½(Difference
max
+Difference
min
)
obs: observed
exp: expected
Detector
3)
Current Reference Position corr: corrected
For details cf. chapter Reference Values
[}15]
2-Theta
3)
Corrected Reference Position
(Current Reference Position - Reference
Position corr)
Shift
Height Maximum allowed shift 2θ for specified accuracy of:
Vertical 150 0.02° ± 0.01°
214 0.03° ± 0.015°
258 0.04° ± 0.02°
Horizontal 214 0.02° ± 0.01°
258 0.02° ± 0.01°
1)
see table 3.2
2)
see table 3.4
3)
mark applicable: detector in case of Theta/Theta and 2-Theta in case of Theta/2Theta
Depending on specific measurement setups, individual reflections may not be measurable. Then measurements must be restricted to accessible reflections.