KYORITSU 6011A - Manual (Page 21)

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6.4 The loop impedance test
WARNING
DO NOT PROCEED WITH TESTING UNLESS THE P-E AND P-N
LAMPS ARE LIT TO CONFIRM THAT THE WIRING IS CORRECTLY
CONNECTED. Should these two lamps not be lit, investigate the
wiring connections of the installation and rectify any faults before
proceeding with the test. If the
LED is lit do not proceed.
a. Loop Impedance at Mains Socket Outlet
1．Select the 20Ω,200Ωor 2000Ωrange as desired
2．Connect the mains lead to the IEC socket of the instrument(see fig9).
3．Plug the moulded plug of the mains lead into the socket to be tested
4．Carry out the initial checks
5．Press the test button. A beep will sound as the test is conducted and the
value of loop impedance will be displayed
6．Wait for the display to indicate the input voltage before conducting another
test or before disconnecting the instrument from the socket.
If the display shows “OL ”then this usually means the value measured
exceeds the range selected, e.g. if the 20Ωrange was selected then the loop
impedance is greater than 19.99Ωand you must switch up a range to the
200Ωrange.
b. Loop impedance at the distribution board
-In order to test the Loop impedance at the distribution board equipment the
optional OMA DIEC(Model7133)is necessary.
1．Select the 20Ω,200Ωor 2000Ωrange as required
2．Connect the optional OMA DIEC(Model7133)to the IEC socket on the
instrument
3．Connect the red phase lead of the optional OMA DIEC(Model7133) to 1
phase of the distribution board, the black neutral lead to the neutral of the
distribution board and the green crocodile clip to the earth
4．Carry out the initial checks
5．Press the test button. A beep will sound as the test is conducted and the
value of loop impedance will be displayed
6．Wait for the display to indicate the input voltage before conducting another
test or disconnecting from the distribution board. When disconnecting from
the distribution board, it is good practice to disconnect the phase first
system.