Operation Manual

25
Fig. 5.3: Example of insulation resistance measurement results
Displayed results:
R: Insulation resistance
Um: Test voltage of the BENNING IT 110/ BENNING IT 120 B
Save displayed results for documentation purposes. Refer to chapter 6.1 for further information on
setting functions and saving of measurement results. (BENNING IT 120 B only)
Warning:
- Insulation resistance measurement should only be performed on de-energised objects!
- When measuring insulation resistance between installation conductors all loads must be dis-
connected and all switches closed.
- Do not touch the test object during the measurement or before it is fully discharged. Risk of
electric shock!
- When an insulation resistance measurement has been performed on a capacitive object auto-
matic discharge may not be done immediately. Warning message and actual voltage is dis-
played during discharge, until voltage drops below 10 V.
- Do not connect test terminals to external voltage higher than 600 V (AC or DC) in order not to
damage the BENNING IT 110/ BENNING IT 120 B.
Note:
- In case of voltage higher than 10 V (AC or DC) between test terminals, the insulation resis-
tance measurement will not be performed.
5.2 Resistance/ continuity testing (R
LOW
)
Two Resistance/ Continuity testing sub-functions are available:
- LowΩresistancemeasurement
- Continuity measurement
5.2.1 LowΩresistance(RLOW)
This test is used to ensure electric safety and correct connection of all protective conductors, earth
conductorsorbondingconductors.ThemeasurementofLowΩresistanceisperformedwithau-
tomatic pole reversal of the test voltage and the test current of more than 200 mA. This measure-
ment completely complies with the EN 61557-4 regulations.
HowtoperformLowΩresistancemeasurement:
Step 1 Select R
LOW
-Ω,DURCHGANG/CONTINUITYwiththefunctionselectorswitch.Usethe
/ keys to select RLOW. The following menu is displayed:
Fig. 5.4: LowΩ resistance measurement menu