Select the R ISO function using the function selector keys.
Set the required test voltage.
Enable and set limit value (optional).
Disconnect tested installation from mains supply (and discharge insulation as required).
Connect test cable to the instrument and to the item to be tested (see
Figure 5.6 and
Figure 5.7).
Different test cable must be used for testing with nominal test voltage U
N
≤ 1000 V and
U
N
= 2500 V. Also different test terminals are used.
The standard three-wire test lead, schuko test cable or plug / tip commanders can be
used for the insulation test with nominal test voltages ≤ 1000 V. For the 2500 V
insulation test the two wire 2.5 kV test lead should be used.
Press the TEST key to perform the measurement (double click for continuous
measurement and later press to stop the measurement).
After the measurement is finished wait until tested item is fully discharged.
Store the result by pressing the MEM key (optional).