10 Isolation resistance measurement (Iso.)
54
ARGUS Copper Box
Example measurements:
The example shows the measurement of
a resistance between Tip/Ring, Tip/
Ground and Ring/Ground of >1000 MΩ.
This indicates that the line is not
damaged. Depending on the require-
ment, a value of e.g >300 MΩ is
considered good. Values <300 MΩ and
>5 MΩ should be examined more closely.
Values under 5 MΩ indicate an isolation
fault.
In this example, the measurement shows
a markedly low resistance between Ring
and Ground. This indicates a fault.
Ideally, the values of Tip to Ground and
Ring to Ground should always be in
balance.
A value of 470 kΩ indicates a passive test
termination.
The value should be verified by reversing
the polarity with
<Pol. inverse>.
Fast „Isolation resistance measurement“,
e. g. of all pins at the demarcation point
with respect to each other and earth.
To save significant time in measuring, the
measuring range was set e. g. to „2 MΩ -
500 MΩ“ and susceptibility „uncertain
(fast)“ was selected. You can display val-
ues outside the measuring range using
<or> (e. g. <2 MΩ or >500 MΩ).
When continuously measuring with the susceptibility „Reliable for external volt-
age“, the measured values cannot be updated directly after short-curcuiting the
line. The measurement can repeat up to four times before the display shows a
new value.
<Restart>
Starts a new measurement.
