Choice of the measurement units : This Meter can
display
cable leng
t
hs in
ei ther Engli sh s ys tem
(ft
,
i n) or Metric s ys tem
( m, cm). T o change the
measuremen
t
sc ale system, press the UNIT button af
t
er
the previous length
measurement is carried out. Then, the Meter will display “ ” in the lower
display as the following example for English
t
o Metric measurement conversion.
Press the TEST button
to read
t
he cable length in Me
t
ric scale.
Please note that this feature enables the Meter compatible with both English
scale system and Metric scale system very conveniently without returning the
Meter to factory.
5. Changing the Measurement Scale between English and Metric
Fig. 15
For coaxial
,
twisted pair
and shielded cable
types, an accuracy
of 2 % (o
f
reading) can be expec
t
ed, or
20 in (0.5
m) for a cable
less than 30 ft (10
m)
.
The V.O.P is less well defind wi
t
h unshielded mul
t
icore cable (including
mains
cable) and is
lower when
t
he cable
is tightly wound on a spool
than
when it is
installed. This is due to capacitance and inductance
effects between the turns.
Therefore
,
the accuracy for these cables can be a little
bit deteriorated.
The BNC
t
o Alligator Clip adaptor has
an e
f
fective length of 8 inches (20 cm).
6. Measurement Accuracy
20 21
To Next Page
Loading...
