NOVA AND NOVA PRO
Measurements
18
5.
Measurements
5.1.
M
Insulation resistance
The Insulation resistance measurement is performed in order to ensure safety against electric
shock. Using this measurement, the following items can be determined:
❑
Insulation resistance between installation conductors,
❑
Insulation resistance of non-conductive rooms (walls and floors),
❑
Insulation resistance of ground cables,
❑
Resistance of semi-conductive (antistatic) floors.
How to perform an insulation resistance measurement
Step 1
Select
Insulation
function with the function selector FCT key. The following
menu is displayed:
Figure 5-1:
Insulation resistance measurement menu
Step 2
Set the following measuring parameter and limit values:
❑
Volt:
Nominal test voltage,
❑
Limit:
Low limit resistance value.
Step 3
Ensure that no voltages are present on the item for testing. Connect the test leads to the
NOVA instrument. Connect the test cables to the item under test. (see figure 5.2) to
perform insulation resistance measurement.
Figure 5-2:
Connection of universal test cable
