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Testboy TV 455
TESTBOY TV 450
Insulation resistance
31
Insulation resistance measuring procedure
* model TESTBOY TV 450 (TYPE B)
Select the
INS
function using the function selector switch.
Set the required test voltage.
Enable and set limit value (optional).
Disconnect tested installation from mains supply (and discharge insulation as
required).
required).
Connect test cable to the instrument and to the item to be tested (see figure 5.6).
Press the TEST key to perform the measurement (double click for continuous
measurement
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)*.
Figure 5.7: Example of insulation resistance measurement result
Displayed results:
R.........................Insulation resistance
Um......................Test voltage – actual value.
Um......................Test voltage – actual value.