EXTECH MG320 [8/12] Accuracy self test function

8 MG310-en-GB_V1.0 12/15

ACCURACYSELF‐TESTFUNCTION

TheMG310featuresa10MΩaccuracycheck

featurefortheInsulationResistancemode.

Toverifytheaccuracy:

1. Connectawirejumpertothemeter

betweentheLINE(4)andV(3)

terminalsasshowninthe

accompanyingillustration.

2. Selectoneofthethreetestvoltage

(250/500/100V)switchpositions.

PresstheTESTbuttontobeginthetest.

4. Whentestingiscomplete,themeter

willdisplay10.0MΩ(±0.1MΩ).Ifthe

meterdoesnotshowanaccurate

readingpleasehaveitserviced.

LOWRESISTANCECONTINUITYTESTING

WARNING: To avoid electric shock, never measure continuity on circuits or wires that have

voltage on them.

1. Setthefunctionswitchtothe

(continuity)position.

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

intotheGUARD(2)jack.

Inserttheredtestleadbananapluginto

theEARTH(1)jack.

3. PresstheTESTbutton.Thebuttonlamp

willlightindicatingthattestingcan

begin.

4. Touch

thetestprobetipstothecircuit

orwireyouwishtocheck.

5. Iftheresistanceislessthan

approximately20Ω,theaudiblesignal

willsoundandtheaudioiconwillbe

displayed.Ifthecircuitisopen,the

displaywillindicate>220Ω.

6. Pressthe

TESTbuttonagaintodisengagethetestmode(thelampwillswitchoff)before

removingthetestleadsfromthecircuitundertestandfromthemeter.