NOVA AND NOVA PRO
Measurements
23
Step 4
Check the warnings and online voltage/terminal monitor on the display before
starting the measurement. If everything is OK and the
is shown, press the TEST
key to start the measurement. The actual measuring result with
or
indication (if
applicable) will be displayed during the measurement.
As this is a continuous test, the function will require stopping. To stop the
measurement at any time press the TEST key again. The last measured result will
be displayed together with the
or
indication (if applicable).
Figure 5-10: Example of Low current continuity measurement result
Displayed result:
R ..............
Low current continuity resistance result.
I ...............
Current used in the measurement
Warning:
❑
Low current continuity measurement should only be performed on de-energized
objects!
Notes:
❑
If a voltage of higher than 10 V exists between test terminals, the continuity
measurement will not be performed.
Before performing a continuity measurement, compensate for the test lead
resistance (if necessary). The compensation is performed in
Continuity
sub-
function
R LowΩ
.
5.3.
Testing RCDs
When testing RCDs, the following sub-functions can be performed:
❑
Contact voltage measurement,
❑
Trip-out time measurement,
❑
Trip-out current measurement,
❑
RCD autotest.
In general, the following parameters and limits can be set when testing RCDs:
❑
Limit contact voltage,
❑
Nominal differential RCD trip-out current,
❑
Multiplier of nominal differential RCD trip-out current,
❑
RCD type,
❑
Test current starting polarity.
