EXFO MaxTester 635 - Manual (Page 118)

Multimeter Tests
110 MAX-635
Isolation
Isolation
The Isolation test, also known as leakage, allows you to run a resistance
test over a period of time to look for high-resistive faults. The test, also
referred to as a stress or leakage test, shows how cable resistance may be
lowered by applying a high voltage to the pair under test. This method may
also reveal poor wiring.
Snapshot
The isolation Snapshot shows measured isolation
resistance values for each lead combination. The
parameters are as follow:

Current Group is the current test group name, for
example Multimeter.

Current Test displays the test being measured.
Here you can switch to another test from the given
list. However, this action will terminate the
ongoing measurement test.

Selected Pair allows you to select All Pairs or a
single wire pair for measurement.

Soak Voltage allows you to apply a voltage value to the pair(s)
currently under test. If your unit has the HIVOLT (high voltage) software
option configured, the Soak Voltage parameter values are extended up
to 500 V maximum.
Note: Since Soak Voltage is inherited in other tests that use the Isolation test, the
HIVOLT option also applies to the following tests: Pair Detective, User Auto
Test.

Soak Time sets a soak period of time from 1 to 60 seconds.

Threshold Settings button opens a new page that allows you to set
isolation thresholds for each pair.