Digital Loop Tester
M
LT7
User Guide
Guide de l’utilisateur
Gebrauchsanleitung
Guía del usuario
NOTE
THE INSTRUMENT MUST ONLY BE USED BY SUITABLY TRAINED AND
COMPETENT PERSONS
.
Symbols used on the instrument
Caution: refer to accompanying notes.
Equipment protected throughout by Double Insulation
(Class
II
)
Equipment complies with relevant EU Directives
SAFETY WARNINGS
✱
Safety warnings and precautions must be read
and understood before the instrument is used.
They must be observed during use.
✱
Continuity of protective conductors and earthed
equipotential bonding of new or modified
installations must be verified before carrying out
an earth fault loop impedance test.
✱
Exposed metalwork of an installation or
equipment under test must not be touched.
✱
LT7
must not be connected across two phases
of a 3 phase supply.
✱
The LCD neon voltage indicators cannot reveal a
Neutral - Earth reversal.
✱
Loop impedance <0,01
Ω
must be investigated.
✱
Test leads, probes and crocodile clips must be in
good order; clean, and with no broken or cracked
insulation. Avoid drawing excessive arcs on high
current tests.
✱
The mains power cord forms part of the
measuring circuit of the instrument. This test lead
must not be modified or changed in any way, or
be used in any other electrical instrument or
appliance.
✱
The instrument must not be used if any part is
damaged.
✱
Use of the instrument in any unspecified manner
may impair the protection provided.
