KYORITSU 5406A - Page 20

 18 
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.
● Equipment following the RCD, e.g. capacitors or rotating machinery,
maycauseasignificantlengtheningofthemeasuredtriptime.
● Theearthelectroderesistanceofameasuringcircuitwithaprobeshall
notexceed50Ωat500mA(20Ωat×5500mAonly)range.
● Ifthe"Testbutton"isreleased,theresultwillbedisplayedfor3sbefore
revertingtozero.Ifthebuttonishelddown,theresultwillbedisplayed
untilthebuttonisreleased.Ifthebreakertrips,thedisplaywillreadthe
triptime.Thedisplaywillbeheldforapprox10s.
Fig.9