37
3.9.4. READING OF THE RESULT
EARTH Ra Sel.
02
/
23
/
2014 10
:
47
100
Ω
50 . 1 Hz
7 %
R
Asel
3 8
.
4 2
Ω
I
s e l
1 6 3 . 5 m A
Z
a
3 . 8 4 0
Ω
R
a
3 . 8 3 8
Ω
L
a
2 . 6 m H
..\.. ..\..
Value of the alarm threshold.
Measurement result.
Case where the measurement is
above the alarm threshold.
Value of the reference voltage for the
calculation of Ik.
The rod is connected.
Programmed maximum contact
voltage.
Compensation for the resistance of
the measurement leads is activated.
The clamp is connected.
The second page is used to see the value of short-circuit current Ik, f loop impedance Z
S
, of loop resistance R
S
nd of loop induct-
ance L
S
.
The third page is used to see the value of the voltages U
LN
, U
LPE
, U
NPE
and on the rod (
) before the measurement.
3.9.5. ERROR INDICATION ((LOOP, EARTH ON LIVE CIRCUIT, AND SELECTIVE EARTH ON LIVE CIRCUIT)
The commonest errors in the case of a loop impedance measurement or earth measurement on live circuit are:
A connection error.
An earth rod resistance that is too high (>15 k
W
): reduce it by packing the earth around the rod and moistening it.
A voltage on the protective conductor that is too high.
A voltage on the rod that is too high: move the rod out of the influence of the earth electrode.
Tripping in the non-tripping mode: reduce the test current.
A current measured by the clamp in selective earth on live circuit that is too low: the measurement is not possible.
The user may have picked up a charge of static electricity, for example by walking on a carpet. In this case, when he/she
presses the
TEST
button, the device displays the error message «earth potential too high». The user must then be dis-
charged by touching an earth before making the measurement.
Value of the current measured by
the clamp.
Value of the impedance.
Value of the resistance.
Value of the inductance.
Use the
key to see the rest of the
display of the measurement and the
key to return to the previous page.
For help with connections or any other information, use the help function.
