NOVA AND NOVA PRO
Measurements
19
Step 4
Check the displayed warnings and online voltage/terminal monitor before starting
the measurement. If
is displayed, press the TEST key.
After the test is done, measured results are displayed, together with the e
or
indication (if applicable).
Figure 5-3
: Example of insulation resistance measurement results
Displayed results:
R ..............
Insulation resistance,
Um ...........
Actual voltage applied to item under test
Warnings:
❑
Insulation resistance measurement should only be performed on de-energized
objects!
❑
When measuring the insulation resistance between installation conductors, all loads
must be disconnected and all switches closed!
❑
Do not touch the test object during the measurement or before it is fully
discharged! Risk of electric shock!
❑
In order to prevent damaging the test instrument, do not connect test terminals to an
external voltage higher than 550 V (AC or DC).
5.2.
Continuity
Two continuity sub-functions are available:
❑
RLow
Ω
, ca. 240mA continuity test with automatic polarity reversal.
❑
Low current (ca. 4mA) continuous continuity test, useful when testing inductive
systems.
5.2.1.
R low test
This function is used to test the resistance between two different points of the installation to
ensure that a conductive path exists between them. The test ensures that all protective
conductors, earth conductors or bonding conductors are correctly connected, terminated and
have the correct resistive value.
The measurement of the R Low resistance is performed with a test current of more than
200m@2Ohm. An automatic pole reversal of the test voltage and the test current is performed
