www.megger.com
5
SAFETY WARNINGS
SAFETY WARNINGS
Safety warnings and precautions must be read and understood before the instrument is used.
They must be observed during use.
Warnings:
• The circuit under test must be switched off, de-energised and isolated before test connections are
made when carrying out insulation and continuity tests.
• Continuity of protective conductors and Grounded equipotential bonding of new or modified
installations must be verified before carrying out an Ground fault loop impedance test, GFCI or
Ground testing
• Do not touch circuit connections and exposed metalwork of an installation or equipment under
test. Under fault conditions the system Ground could become hazardous live.
• Do not touch the Ground stakes, test leads and their terminations (including connections to
the Grounding system under test) if an installation Ground fault can arise, unless adequate
precautions are taken.
• The ‘live circuit warning’ and ‘automatic discharge’ functions are additional safety features and
should not be regarded as a substitute for normal safe working practices.
• Do not move the rotary switch positions while a test is in progress.
• Do not operate the instrument or connect it to any external system if it shows any visible signs
of damage or if it has been stored for prolonged periods in unfavourable conditions.
• Do not operate the instrument or connect it to any external system if the battery compartment
or casing is open or any parts of the case (including keypad, selector switch, display window,
etc.) are missing.
• Always disconnect the instrument from all systems while batteries are being changed or the fuse
replaced
• Do not replace rechargeable cells in the instrument with non-rechargeable “dry” cells and
attempt to charge the cells. This can cause explosion or fire.
• Do not operate charging equipment supplied with the instrument in damp or wet environments
or outdoors. All test leads must be removed from the instrument while charging.
• After insulation tests, capacitive circuits must be allowed to discharge before disconnecting
test leads. Locking the insulation test ON should only be used where there is no risk of a circuit
holding a charge.
• The instrument should not be used if any part of it is damaged.
• Test leads, probes and crocodile clips must be in good order, clean and with no broken or cracked
insulation.
• All test leads supplied with the instrument form part of the measuring circuit of the instrument.
They must not be modified or changed in any way, or be used with any other electrical
instrument or appliance.
• A plug severed from the power cord MUST be destroyed, as a plug with bare conductors is
hazardous in a live socket outlet.
• Ensure that hands remain behind guards of probes/clips when testing.
• U.K. Safety Authorities recommend the use of fused test leads when measuring voltage on high
energy systems.
• Replacement fuses must be of the correct type and rating.
• Failure to fit the correctly rated fuse will result in damage to the instrument in the event of an
overload.
• Special precautions are necessary when operating in situations where “live” Grounds may be
encountered: isolation switches and fuses (not supplied with this instrument) must be used.
