KYORITSU 6011A - Manual (Page 24)

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8. RCD TESTS
DISCONNECT THE INSTRUMENT FROM THE CIRCUIT UNDER TEST
BEFORE OPERATING THE FUNCTION SWITCH
TO SELECT THE RCD TEST RANGE SELECT “RCD”
8.1 Purpose of the RCD test
The RCD must be tested to ensure that operation takes place quickly enough to
ensure that there is unlikely to be serious danger to a person experiencing an
electric shock from the system. This test must NOT be confused with that taking
place when the "test" button on the RCD is pressed; operation of the test button
simply trips the breaker to ensure that it is working, but does not measure the
time taken to break the circuit.
CAUTION ：Setting up to 300mA are effective in the RCD ×5
function. In 300/500/1000mA range current value is limited to
approximately 1.0A. And measuring time of the 1000mA range is limited
to the 200ms .Also, setting up to 500mA is effective in the RCD DC
function. In 1000mA range current is limited to approximately 500mA.
1．Select the 200A, 2000A or 20kA range.
2．Connect the OMA DIEC(Model7133) distribution board lead to the IEC
socket on the instrument.
3．Connect the red phase probe of the OMA DIEC(Model7133) to the phase of
the system, the black probe to the neutral of the system and the green
crocodile clip to the neutral of the system.
4．Carry out the initial checks.
5．Press the test button. A bleep will sound as the test is conducted and the
value of PSC will be displayed.
6．Wait for the display to clear to zero before conducting another test or
disconnecting the instrument. It is good practice to disconnect the phase
lead first.
Note：On 200A PSC range, for Loop impedance lower than 5 ohm (PSC
greater than 50A approx) is not possible to obtain an accurate PSC
reading even if the unit will give a result. In these cases, for accurate
PSC tests, please use the 2000A or 20KA ranges.
If the PSC ranges are selected whilst connected to a socket outlet via the
mains lead KAMP10, a test will take place between Phase and Earth due to
fixed wiring of the moulded mains plug i.e. a Phase-Earth fault current test.