Norland Connect-Chek CC6000, Manual

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95
9.1 DATA INTERPRETATION
- Measurement Regions (when “Show Regions” option selected in
Scan Settings subtab)
•
Innermost of three concentric blue circles = Averaging Diameter
• Middle of three concentric blue circles = Extraction Diameter
• Outermost of three concentric blue circles = Fitting Diameter
3. Fiber Height (nm ) Displays the
amount of undercut or protrusion
of the fiber in the connector. The
NCC software determines the
Spherical Fiber Height, which is
defined as the difference in the
height between the center of the
fiber and the theoretical height in
the center based on the ferrule.
This is the method recommended in the TIA and IEC test procedures.
The TIA use a sliding scale for the amount of undercut recommended as a function
of the Radius of Curvature. The formula below shows this relationship
•
SIGN CONVENTION FOR FIBER HEIGHT:
•
+ = Protrusion
• - = Undercut
U = (-0.02) * ROC
3
* (1.3 * ROC
2
) - 31 * ROC + 325
where U is Fiber Undercut and ROC is Radius of Curvature