User's Manual

Extech Instruments
9 GX900-GX930-EN V1.1 5/14
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SAFETYINSTRUCTIONS–INPUTPROTECTIONLIMITS
This meter has been designed for safeuse, but must be operated with caution.The
ruleslistedinthissafetysectionmustbecarefullyfollowedforsafeoperation.
1. NEVERapplyvoltageorcurrenttothemeterthatexceedsthespecifiedmaximum:
InputProtectionLimits
Function MaximumInput
VDCorVAC 1000VDC/ACrms
mAAC/DC 800mA1000Vfastactingfuse
AAC/DC
10A1000Vfastactingfuse(20Afor30
secondsmaxevery15minutes)
Frequency,Resistance,
Capacitance,DutyCycle,Diode
Test,Continuity
1000VDC/ACrms
Temperature 1000VDC/ACrms
2. USEEXTREMECAUTIONwhenworkingwithhighvoltages.
3. DONOTmeasurevoltageifthevoltageonthe"COM"inputjackexceeds1000V
aboveearthground.
4. NEVERconnectthemeterleadsacrossavoltagesourcewhilethefunctionswitchis
inthecurrent,resistance,ordiodemode.Doingso
candamagethemeter.
5. ALWAYSdischargefiltercapacitorsinpowersuppliesanddisconnectthepower
whenmakingresistanceordiodetests.
6. ALWAYSturnoffthepoweranddisconnectthetestleadsbeforeopeningthecovers
toreplacethefuseorbatteries.
7. NEVERoperatethemeterunlessthe
backcoverandthebatteryandfusecoversare
inplaceandfastenedsecurely.
8. Iftheequipmentisusedinamannernotspecifiedbythemanufacturer,the
protectionprovidedbytheequipmentmaybeimpaired.