KYORITSU 5406A - Manual (Page 17)

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(3) Press the 0° /180° switch to change the phase and repeat step(2) .
(4) Change the phase again and repeat step (2).
●Be sure to return the tested RCD to the original condition after the test.
WARNING
● If the voltage between phase and earth exceeds approx. 260V,
"V L-PE" is shown on the LCD when the test button is pressed,
and the measurement is halted. Disconnect the instrument
from the mains supply and check the voltage between phase
and earth if "V L-PE Hi" is indicated.
● If the overheat symbol appears on the display ( ) disconnect
the instrument from the mains supply and allow to cool down.
● When making a test with the range larger than the RCD rated
tripping current or when wiring is not correct, it can happen that
RCD trips and "no" is shown on the display.
● When the Uf voltage rises to UL value or greater, the
measurement is automatically suspended and "Uf Hi" is
displayed on the LCD.
MAKE SURE TO KEEP CLEAR OF EARTHED METAL DURING THE
OPERATION OF THESE TESTS.
Note ：
● If the RCD does not trip, the tester will supply the test current for a
maximum of 1000ms on the X1/2 and X1 ranges. The fact that the
RCD has not tripped will be evident because the P-N and P-E LEDs
will still be on.
● If a voltage exists between the protective conductor and earth, it may
influence the measurements.
● If a voltage exists between neutral and earth, it may influence the
measurements, therefore, the connection between neutral point of the
distribution system and earth should be checked before testing.
● If leakage currents flow in the circuit following the RCD, it may influence
the measurements.
● The potential fields of other earthing installations may influence the
measurement.
● Special conditions of RCDs of a particular design, for example S-type,
shall be taken into consideration.
● The earth electrode resistance of a measuring circuit with a probe shall
not exceed 50 Ωat 500mA (20 Ω at ×5 500mA only) range.