Extech Instruments GX900 Manual

A SERVICE OF

next previous

ExtechInstruments

15 GX900-EU-EN V1.6 4/14



ACVOLTAGEMEASUREMENTS

WARNING:RiskofElectrocution.Theprobetipsmaynotbelongenoughtocontactthelivepartsinside

some240Voutletsforappliancesbecausethecontactsarerecesseddeepintheoutlets.Asaresult,the

readingmayshow0voltswhentheoutletactuallyhasvoltageonit.Makesuretheprobetipsaretouching

themetalcontactsinsidetheoutletbeforeassuming that novoltageispresent.

CAUTION:DonotmeasureACvoltagesifamotoronthecircuitisbeingswitchedONorOFF.Largevoltage

surgesmayoccurthatcandamagethemeter.

1. SetthefunctionswitchtotheV~position.

2. Inserttheblacktestleadbananaplugintothenegative

COMjack.Insertredtestleadbananaplugintothe

positiveVjack.

3. Touchtheblacktestprobetiptotheneutralsideofthe

circuit.Touchtheredtest

probetiptothe“hot”sideof

thecircuit.

4. Readthevoltageinthedisplay.

dBm/dBVACMEASUREMENTS

ThemeteriscapableofdisplayingACvoltageasadBvalue;

relativeto1milli‐watt(dBm),relativeto1V(dBV),ortoa

customreferencevalue.

1. SetthefunctionswitchtotheV~position

2. PresstheF1key(MENU)ontheLCDandthen

navigatetothe

dBm/dBVfieldusingthearrowkeys

andthenpressOK.

3. NavigatetothemenuitemlabeleddBmandthen

pressOK.

4. Inserttheblacktestleadbananaplugintothe

negativeCOMjack.InsertredtestleadbananaplugintothepositiveVjack.

5. Touchtheblack

testprobetiptotheneutralsideofthecircuit.Touchtheredtest

probetiptothe“hot”sideofthecircuit.

6. ReadthedBmintheprimarydisplayareaandreadtheVoltageinthesecondary

displayarea.