BENNING IT 115
Safety and operating instructions
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Remarks with regard to measurements:
General
The
icon means that the selected measurement cannot be carried out due to
irregular conditions at the input terminals.
Carry out measurements of the insulating resistance, low-impedance resistance,
continuity and earthing resistance on discharged objects only!
The "PASS" / "FAIL" indication is activated, if a limiting value has been defined. Choose
appropriate limiting values for evaluating the measuring results.
If only two of the three test cables are connected to the electrical installation to be
tested, only the voltage value between those two test cables shall be valid.
Insulating resistance
The three-wire test cable as well as the "Commander" test probe can be used for
measuring the insulating resistance.
If a voltage higher than 30 V (AC or DC) is measured at the testing terminals, the
measurement of the insulating resistance cannot be carried out.
The installation tester automatically discharges test objects after the measurement is
finished.
Double-click the "TEST" key to carry out a continuous measurement.
Low-impedance measurement / continuity test
If a voltage higher than 10 V (AC or DC) is measured at the testing terminals, the low-
impedance measurement / continuity test cannot be carried out.
Before carrying out a low-impedance measurement / continuity test, compensate the test
cable resistance (if necessary).
Earthing resistance
If a voltage higher than 30 V (AC or DC) is measured at the testing terminals, the
measurement of the earthing resistance cannot be carried out.
If an interference voltage higher than 5 V is detected at the testing terminals H and E or
S, the warning symbol " ” will be displayed indicating that the measuring result might
have been influenced!
Residual current protection devices (RCDs)
The parameters set for a measuring function will be taken over for other RCD
measurements as well!
Contact voltage measurement usually does not involve any tripping of the residual
current protection devices (RCD). However, the tripping threshold might be exceeded
due to leakage currents via the protective conductor (PE) or via capacitive connections
between the conductors L and PE.
Compared to the loop impedance RL (contact voltage subresult), the measurement of
the loop impedance Zs
rcd
needs more time, but offers a considerably higher degree of
accuracy.
The tripping time and tripping current measurement is only carried out, if the contact
voltage at nominal differential current is lower than the preset limiting value of the
contact voltage.
The automatic test sequence (RCD AUTO function) is stopped, if the tripping time is
outside the admissible value.
