BENNING IT 115
Device description
- 31 -
How to perform insulating resistance measurements
Select the
R
ISO
function by means of the function selector switch.
Set the required testing voltage and the limiting value (optional).
Make sure that the test object is free of voltage and discharge available capacities.
Connect the test cables to the test object (see figure 5.6).
Press the "
TEST
" key to start the measurement. Double-click the "
TEST
" key (M
flashes)
to perform a continuous measurement. Press the key again to finish the measurement.
After measurement, wait until the test object is completely discharged.
Figure
5
.7:
Example of an insulating resistance measurement
Results displayed:
R
.............. insulating resistance
Um
........... testing voltage (actual value)
Attention:
Measurements of the insulating resistance must be carried out only at test objects which
are free of voltage!
Disconnect all loads and close all switches for measuring the insulating resistance
between conductors of the installation.
Do not touch the test object during measurement and before it is completely discharged!
There is danger of a life-threatening electric shock!
If the insulating resistance measurement is carried out on a capacitive object, automatic
discharging might take place time-delayed. The warning symbol and the actual voltage
will be displayed during discharging.
Do not connect the test cables to external voltages higher than 550 V (AC or DC) in
order not to damage the BENNING IT 115 installation tester!
