sebaKMT Easyflex Com, Инструкция по эксплуатации

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MAN_Easyflex_com_eng_01.doc 57
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In cable testing it is common practice to specify the signal
propagation velocity in term of half the actual velocity.
When employing the reflection technique, this is a usual
way of taking twice the signal travel path into account. To
depict a reflection on the screen, the signal has to travel
from the meter to the fault and back. If the
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values of
various cables are listed in a table, these values can directly
be used to convert the measured signal propagation time t
x
into fault distance E.
Reduction Factor NVP (Nominal Velocity (of) propagation)