Metrohm NIRS XDS MasterLab Analyzer - Manual (Page 36)

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The adjustment ranges from 9.5mm to 17.25mm, in adjustment steps of 0.25mm. The effective
scanned sample areas at various spot sizes are as follows:
Spot Size
Minimum Sample Diameter.* Scanned Sample Area
Diameter (mm) Diameter (in.) Square mm Sq. Inches
9.5 mm 11.9 mm 0.47 in. 70.9 sq. mm 0.11 sq. in.
10 mm 12.5 mm 0.49 in. 78.5 sq. mm 0.13 sq. in.
11 mm 13.8 mm 0.54 in. 95.0 sq. mm 0.15 sq. in.
12 mm 15.0 mm 0.59 in. 113.1 sq. mm 0.18 sq. in.
13 mm 16.3 mm 0.64 in. 132.7 sq. mm 0.21 sq. in.
14 mm 17.5 mm 0.69 in. 153.9 sq. mm 0.25 sq. in.
15 mm 18.8 mm 0.74 in. 176.7 sq. mm 0.28 sq. in.
16 mm 20.0 mm 0.79 in. 201.1 sq. mm 0.32 sq. in.
17 mm 21.3 mm 0.84 in. 227.0 sq. mm 0.36 sq. in.
17.25 mm 21.6 mm 0.85 in. 233.7 sq. mm 0.37 sq. in.
*Based upon 125% of beam diameter
Interpolate for spot sizes in between those listed. Areas are rounded to the digits shown.