METREL MI 2014, Инструкция по эксплуатации

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MI 2014 Cable Scanner Section III Cable Scanner operation
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17. Reinitialisation (setting default values /
length unit )
The default set cable type, default NVP factor and length unit are set if reinitalizing the
instrument.
Press
key while powering on the instrument (
rES is displayed) and press
afterwards. Any other action that pressing
will break off the reinitalisation .
Deafult Cable Type: UTP , all 4 pairs connected
Default NVP factor : 0.69
Default length unit: meters
The length unit can be set by pressing the
key while powering up the instrument.
Select the unit with / keys and press afterwards.
In the table below typical NVP values for some popular cable types can be found.
Cable Standard Cable Type NVP
Class C, Class D, Cat 5, Cat 5E UTP, ScTP, STP, FTP
100
Ω
STP 120
Ω
STP 150
Ω
0.69
0.69
0.78
Cat 4
UTP, ScTP 100
Ω
0.66
Cat 3
UTP, ScTP 100
Ω
0.62
Coax Cables
Coax 10Base2 50
Ω
0.67
Coax 10Base 5 50
Ω
0.78
Coax RG58 50
Ω
0.74
Coax RG8 50
Ω
0.84
Coax RG59 75
Ω
0.78
Coax RG62 93
Ω
0.84