Calibrating Length Measurements - Fluke MicroScanner MS-POE User Manual

Figure 36. Using the Toner with the IP200 IntelliTone
Cable Map Function

Calibrating Length Measurements

The tester uses an NVP value (nominal velocity of
propagation) and the signal delay through the cable to
calculate length. The tester's default NVP values are usually
accurate enough to verify length; however, you can
increase the accuracy of length measurements by adjusting
the NVP to a specified or actual value.
The default NVP values are 70 % for twisted pair cable and
82 % for coaxial cable (MicroScanner
LEDs show the
wiremap. See
the IntelliTone
manual for
details.
EGK26.EPS
Calibrating Length Measurements
Note
NVP values can vary among cable types, lots, and
manufacturers. In most cases, these differences are
minor and may be disregarded.
2
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