9
Earth Continuity Test function (Models 878 & 877 only)
WARNING
This function measures the Resistance values of earth connection and equipotential
bonding in Low Voltage Distribution Systems up to Nominal Voltage (U
n
) 830V, phase-
to-phase. DO NOT use on Systems with Nominal Voltages above that. Measurements
shall only be carried out on de-energized circuits. The measuring loop is protected by
an HBC 1kV F fuse against accidental extraneous overvoltages.
The LCD icon
used alone throughout in this manual is referred as active
measurements of Earth Continuity Test function through the activat
ion of the TEST
button on the meter or on the Remote Probe. Check the fuse before each
. If the
fuse is open, the meter will display “
OPEn” when the
is being activated at no circuit
connection to the probes. Refer to the maintenance section for fuse replacement.
is inhibited when the meter beeps and displays “
>2V” plus warning against
energized circuit of more than 2V is being connected, before the
is active.
Connecting to energized circuits when the
is active will produce false results and
may blow the protection fuse and/or damage the instrument. Always check with voltage
functions and remove power from the circuits before carrying out the
.
The results of measurements can be adversely affected by impedances of
additional operating circuits connected in parallel or by transient currents.
Setup as illustrated below. This function uses measuring currents of 200mA for 2.199Ω
