IRT25 User Manual

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EXTECHINSTRUMENTS

7IRT25‐en‐GB_V1.02/17

MeasurementNotes

1. Theobjectundertestshouldbelargerthanthespot(target)sizecalculatedbythefieldof

viewdiagram.

2. Ifthesurfaceoftheobjectundertestiscoveredwithfrost,oil,grime,etc.,cleanbefore

takingmeasurements.

3. Ifanobject'ssurfaceishighlyreflectiveapplymaskingtape

orflatblackpainttothesurface

beforemeasuring.

4. Themetermaynotmakeaccuratemeasurementsthroughtransparentsurfacessuchas

glass.

5. Steam,dust,smoke,etc.canobscuremeasurements.

6. Themetercompensatesfordeviationsinambienttemperature.Itcan,however,takeupto

30minutesforthe

metertoadjusttoextremelywideambienttemperaturechanges.

7. Tofindahotspot,aimthemeteroutsidetheareaofinterestthenscanacross(inanupand

downmotion)untilthehotspotislocated.

Maintenance

Cleaning

Tocleanthelensesusecompressedairtocleardustandotherparticles,thencarefullyclean

withawetcottonswab.Thecottonswabshouldbemoistenedwithcleanwater.

Tocleanthemeterhousing,wipewithadamp,softcloth.Donotusesolventsorabrasives.Do

notimmersetheIRT25inwaterorotherliquid.

Troubleshooting

Symptom Problem Action

OLdisplay Targettemperatureexceedsrange Selectatargetwithinrange

‐OLdisplay Targettemperatureunder‐range Selectatargetwithinrange

Batteryiconflashes LowBatterypower ReplaceBatteries

Blankdisplayscreen Lowbatterypower Checkand/orreplacebatteries

NoLaserpointer

Lowbatteryorenvironmental

temperaturehigherthan40°C(104°F)

Replacethebatteries ormovethe

IRT25toanareawithalower

ambienttemperature

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User Manual - Page 7