Megger LTW300 Bruksanvisning
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M
LTW300 Series
Earth Loop testers
User Guide
2
! Safety Warnings and Precautions must be read and understood before the instrument is
used. They must be observed during use.
! The earth loop impedance test creates a temporary low resistance path between
live and earth for the duration of the test. This is particularly hazardous
with both an instrument fault and an installation fault.
Working practice and hazard avoidance must take care of this risk.
! 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.
! Circuit connections and exposed metalwork of an installation or equipment
under test must not be touched.
! Do not leave the instrument connected to the mains supply when not in use.
! Do not leave the instrument connected to the mains supply when performing data
download to a PC.
! Ensure that hands remain behind guards of probes/clips when testing.
! The instrument should not be used if any part of it is damaged.
! The battery cover must be in place whilst conducting tests.
! Test leads, probes and crocodile clips must be in good order, clean and with no
broken or cracked insulation.
! On test leads fitted with a outlet plug and flying leads, never connect test
probes, clips, pins or other objects to the 3 lead plugs because of the
danger of electrocution. These leads should only be used by a suitably
trained, and competent person.
! Some national safety authorities recommend the use of fused leads for voltage
measurement on high energy systems. If loop tests are made it may cause the
fuse to rupture, and so they must be used with caution on voltage testing.
NOTE
THE INSTRUMENTS MUST ONLY BE USED BY SUITABLY TRAINED AND COMPETENT PERSONS.
Users of this equipment and/or their employers are reminded that Health and
Safety Legislation requires them to carry out valid risk assessments of all
electrical work so as to identify potential sources of electrical danger and
risk of electrical injury such as inadvertent short circuits.
!
CAT II
Measurement category II: Equipment
connected between the electrical outlets and the user’s equipment.
CAT III
Measurement category III: Equipment connected between the distribution panel and the electrical outlets.
CAT IV
Measurement category IV: Equipment connected between the origin of the low-voltage mains supply and the
distribution panel.
Symbols used on the instrument:
G
Caution: refer to accompanying notes
t
Equipment protected throughout by Double Insulation (Class II)
c
Equipment complies with relevant EU Directives
Equipment complies with Australian and New Zealand C Tick requirements
Produktspecifikationer
| Varumärke: | Megger |
| Kategori: | mätning |
| Modell: | LTW300 |
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