User guide

X-Rite eXact™ Instrument
100
Patch and Aperture Size Recommendations
For scanning, the aperture size requirements are different than for spot reading only. Refer to the
tables below for requirement information.
Patch size recommendation for spot reading only:
Aperture
Size
Measurement
area size
Opening in
target
window
Recommended
patch size
Screening Range
1.5 mm 1.5 mm 3.5 mm
2.0 mm –
3.0 mm
175 lines/inch or 69 lines/cm or
above
2 mm 2.0 mm 4.0 mm
3.0 mm –
5.0 mm
133 lines/inch or 52 lines/cm or
above
4 mm 4.0 mm 6.0 mm
5.0 mm –
7.0 mm
65 lines/inch or 26 lines/cm or
above
6 mm 6.0 mm 8.0 mm
7.0 mm or
larger
Patch size recommendation for scan reading only:
Aperture
Size
Recommended patch size
for strips < 10 cm/4”
Recommended patch
size for strips 10 cm/4”
to 75 cm/30”
Recommended patch size for
strips > 75 cm/30”
1.5 mm > 3.0 mm > 3.5 mm > 4.5 mm
2 mm > 3.5 mm > 4.0 mm > 5.0 mm
4 mm > 5.5 mm > 6.0 mm > 7.0 mm
6 mm > 7.5 mm > 8.0 mm > 9.0 mm
Patch size recommendation for spot and scan reading:
Aperture
Size
Recommended
patch size for
strips < 10 cm/4”
Recommended
patch size for
strips 10 cm/4” to
75 cm/30”
Recommended
patch size for
strips > 75
cm/30”
Screening Range
1.5 mm 3.0 mm – 4.0 mm 3.5 mm – 4.0 mm 4.5 mm – 5.0 mm
175 lines/inch or 69
lines/cm or above
2 mm 3.5 mm – 6.0 mm 4.0 mm – 6.0 mm 5.0 mm – 7.0 mm
133 lines/inch or 52
lines/cm or above
4 mm 5.5 mm – 8.0 mm 6.0 mm – 8.0 mm 7.0 mm – 9.0 mm
65 lines/inch or 26
lines/cm or above
6 mm 8.0 mm or larger 8.0 mm or larger 9.0 mm or larger