LEM PR1200 ACI Mode D'emploi page 12

Low resistance PE-check (R
PR1200X current probe:
This measuring function is used to measure PE
resistances of instruments with safety class I of 0.01 W to 30 W
with AC voltage as per IEC 61557 – 4 For the low-resistance
PE check the resistance R
earthing contact of the mains plug (device connection) is
measured; In addition, not only the resistance of the PE
connection but also any existing parallel earths R
measured. Thus, the efficacy of the PE conductor can also be
fully checked even if parallel resistances are present.
1 Internal circuitry of test specimen
2 Measuring instrument for PE
resistance measurement
3 Connection test specimen PE
to measuring instrument
4 Connection touchable conducting
parts of test specimen with
measuring instrument (probe tip)
I Alternate current >200 mA AC
q
I Partial current through R
PE
PE connection of test specimen
I // Partial current through
PE
parallel earth connection R
where: Iq = I
PE
10
between the casing and the
PE
+ I //
PE
) with SATURN 700XE and
PE
of
PE
//
PE
// are
PE