Extech Instruments MG500 Manual do Utilizador descarregar pdf (Página 2)

MG500-EU-EN v1.0 7/13

Introduction

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ThankyouforselectingtheExtechInstrumentsModelMG500.Thisdeviceisshippedfullytested

andcalibratedand,withproperuse,willprovideyearsofreliableservice.Pleasevisitourwebsite

(www.extech.com)tocheckforthelatestversionofthisUserGuide,ProductUpdates,and

CustomerSupport.



Safety

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InternationalSafetySymbols

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Thissymbol,adjacenttoanothersymbolorterminal,indicatestheusermustrefertothemanual for

furtherinformation.



This symbol, adjacent to a terminal, indicates that, under normal use, hazardous voltages may be

present



Doubleinsulation

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CAUTIONRISKOFELECTRICSHOCK

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Thistesterhasbeendesignedwithsafetyinmind.However,nodesigncancompletelyprotect

againstincorrectuse.Electricalcircuitscanbedangerousandlethalwhenalackofcautionand

poorsafetypracticesareused.

Donottakefieldmeasurementsoneitherpower

systemgroundingduringperiodsoflightning

activity,oranynon‐insulatedsystemornon‐insulatedcircuit.Intheeventthatlightningoccurs,

stopalltestingandisolateandremoveanytemporarilyinstalledtestspikesortestleads.

Preparationsfortestingpowersystemgrounding(orclosetoit)canleavepersonnelvulnerable

to

exposurecausedbyfaultsat,orfedfrom,thesystemundertest,transferredpotentialsfrom

remotetestgrounds,andinadvertentlineenergizing.Alwaysinsulatethedeviceundertest.

Whiletheprobabilityofsuchoccurrencesislow,personnelsafetywill,nevertheless,be

enhancedbythefollowing:

Whenworkingnearhigh

tensionsystemsrubberglovesandshoesshouldbeworn.Workon

clean,drycrushedrockoraninsulatingblanket.Avoidbarehand‐to‐handcontactbetween

thetesterandextendedtestleads.

Whenusingthetesterwithtestleads,ensurethattheyaresafeandproperlyauthorized.

Disconnectthetesterfromanyexternalcircuitwhencheckingorchangingthefuseand/or

batteries.

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Extech Instruments MG500 Manual do Utilizador Página 2