Elcometer 456 3 Operating Instructions Manual page 49

17.3 SEPARATE NON-FERROUS PROBES
Minimum
Probe type convex surface
diameter
N1 35 mm (1.38")
N1 Right Angle 35 mm (1.38")
N1A Anodiser's 35 mm (1.38")
Probe
N2 100 mm (3.97")
N6 Flat surface
a. This is the recommended maximum calibration foil value to achieve the specified accuracy under these measurement
conditions
Minimum
concave Headroom
surface radius
25 mm (0.98") 85 mm (3.35") 6 mm (0.24")
25 mm (0.98") 28 mm (1.10") 6 mm (0.24")
25 mm (0.98") 85 mm (3.35") 6 mm (0.24")
150 mm (5.90") 85 mm (3.35") 14 mm (0.55")
400 mm 160 mm
Minimum
sample
Cal foil value
diameter
250 µm (10 mil)
250 µm (10 mil)
250 µm (10 mil)
1 mm (40 mil)
58 mm Any
R
a
47