KYORITSU 5410 - Manual (Page 17)

DANGER
● Voltage to earth of Earth electrodes or Protective conductors is auto-
matically detected during RCD test – when applying test currents –
at measurement using EARTH in order to prevent electrical shocks
caused by the damaged earth. When the detected voltage at RCD
test exceeding AC50V(AC100V “x5 range” only), “ Hi V” is
displayed after pressing the Test Button and halt the measurements.
WARNING
● When overheat symbol “ ” appears on the LCD, disconnect the
instrument from the measuring point and allow to cool down.
● Replace the batteries with new ones immediately when the Low
battery warning “ ” starts flashing.
● Setting of IΔn may not be proper or the instrument isn’t connected to
the object under test correctly when “no” is displayed on the LCD.
The IΔn of the instrument and the RCD under test should be the
same. Check the connection prior to measurements.
CAUTION
● Measured results may be influenced by a presence of voltage
between protective conductors and EARTH at measurement using
protective conductors. When testing the circuit with earthed Neutral
wire, check the connection between Neutral and Earth before
starting measurements. Measured results may be influenced by a
presence of voltage between Neutral and EARTH.
● Measured results may be influenced by a presence of leakage
current in the circuit under test. Presence of leakage current may be
doubt if any electric field exists in the other earth equipments.
● Resistance of earthed electrodes in the circuit under test with a
Probe – auxiliary earthed electrode – should be 200Ω (IΔn=15mA) /
100Ω(IΔn=30mA) / 20Ω(IΔn=50/100/200/500mA ), or less.
● Equipment following the RCD, e.g. capacitors or rotating mashinery,
may cause a significant lengthening of the measured trip time.
● Restore the tested RCD after measurements.
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