Extech Instruments EX655 User Manual

EX65x‐en‐GB_V1.67/16
21
ResistanceMeasurementNotes:
 Thedisplaywillshow“OL”whenanopencircuitisdetectedoriftheresistance>maximum
range.
 Thetestleadsintroduceanerrorofapprox.0.1Ω～0.2Ωforlowresistancemeasurements.
UsetheRelativemodetoobtainaccuratereadings.Shortthetestleadstogether,pressthe
RELbutton,andthenmeasurealowresistance.Themetersubtractstheshort‐circuitvalue
fromthereading.
 Ifthetestleadresistanceofprobeis>0.5Ωwhenshorted,inspectthetestleadsandthe
connection.
 Itmaytakeseveralsecondsforthereadingtostabilizewhenmeasuring
resistance>1MΩ.
Thisisnormaloperation.
 Forpersonalsafety,donotmeasureacircuitwithvoltages>30VDCorAC.


Extech Instruments EX655 Specifications

General

Type	Multimeter
Display	LCD
AC Voltage	600V
DC Voltage	600V
AC Current	10A
DC Current	10A
Resistance	40MΩ
Capacitance	100μF
Frequency	10MHz
Continuity	Yes
Diode Test	Yes
Safety Category	CAT III 600V
Optical Resolution	12:1
Response Time	500ms
Spectral Response	8 to 14μm
Battery Type	9V
Battery Life	200 hours
Accuracy	±0.5%
Resolution	0.1mV
Emissivity	0.1 to 1.0