KYORITSU 6010A - Manual (Page 25)

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maximum of 2000ms on the X1/2 and X1 ranges. The fact that the RCD
has not tripped will be evident because the PN and PE LEDs will still be
on.
On RCD ranges, when the N-E voltage rises to 50V or greater, the
measurement is automatically suspended and "VNE Hi" is displayed in
the LCD display.
Leakage currents in the circuit following the RCD may influence the
measurements.The earth electrode resistance of a measuring circuit
with a probe shall not exceed 50Ω at 500mA range.
The potential fields of other earthing installations may influence the
measurement.When the mains voltage is lower than 100V, the "low
voltage" indication "Lo" is displayed in the LCD display. Also, when the
mains voltage is higher than 260V, the "high voltage" indication "Hi" is
displayed in the LCD display.In either case, testing cannot be carried
out as the test button does not function even if you press it .
When making a test with the range larger than the RCD rated tripping
current, it can happen that RCD trips and "no" is shown on the display.
The test button can be locked down for ease of use by pressing it and turning
clockwise. Do not forget to release test button by turning it anti-clockwise
before disconnecting the instrument from the test points. Failure to do so may
leave the tested circuit in a charged condition when carrying out insulation test.
The instrument is provided with a sliding cover to ensure that leads for testing
continuity and insulation resistance cannot be connected at the same time as
test leads for loop testing and RCD testing. If this sliding cover is damaged so
that it fails to perform its function, do not use the instrument and return it to
your distributor for attention.
8. GENERAL