Measuring
28
earth/ground-connection resistance „R
A
“ and the tripping time „t
A
“ (not for
measurement without tripping) and then again „U
L
“ into the display. For a new
measurement press key
R „Start“.
To return to the original measuring mode RCD for displaying the mains voltage
U
LPE
, briefly turn the central selector.
ATTENTION! To be certain that the fault current-protection circuit is operative, the
measurement must be effected at the first measuring point (outlet, device …) of
each FI current circuit with tripping of the FI-Circuit breaker! Measuring without
tripping is only permitted for all measuring points connected in parallel.
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