HT instruments EQUITEST5071 - Manual (Page 19)

EQUITEST 5071
EN - 17
6.3. LOW
10AE204: CONTINUITY 10A IN COMPLIANCE WITH IEC/EN60204-
1:2006
Measurement is carried out in compliance with standard IEC/EN60204-1:2006, which
states that measurement result must be compatible with the protective conductor’s length,
section and material.
The instrument evaluates the limit threshold of measured resistance according to the
following formula:
S
L
R
 
lim
in which:
 L = length in m of the protective conductors being tested, decided by the user
according to design calculations;
 S= section in mm 2
of the protective conductor being tested;
  = resistivity of copper set to the standard average value of 0.017mm 2
/m.
Measurement is carried out by voltammetric method with 4 wires. Therefore, the calculated
value is not influenced by the value of resistance of the measuring cables, so it is not
necessary to carry out any preventive calibration of the cables used for measuring (unlike
with function LOW
).
CAUTION
 Before carrying out the continuity test, make sure there is no voltage at the
ends of the conductor to be analyzed.
 Measurement may be influenced by parallel impedance of additional
circuits or by transient currents. Make sure none of these parasite
elements is present before measuring and always keep test cables
outstretched in order to prevent “coil effects”.
CAUTION
The instrument performs the test with a current
 10A only if resistance is
lower than approx. 0.45
.