Extech Instruments IRT600 - Detecting Mildew

IRT600‐EU‐ENv1.49/135
3. Ifanobject'ssurfaceishighlyreflective,applymaskingtapeorflatblackpainttothe
surfacebeforemeasuring.Allowtimeforthepaintortapetoadjusttothetemperatureof
thesurfaceitiscovering.
4. Measurementscannotbemadethroughglass.
5. Steam,dust,smoke,etc.can
obscuremeasurements.
6. Themeterautomaticallycompensatesfordeviationsinambienttemperature.However,it
cantakeupto30minutesforthemetertoadjusttoextremelywidechanges.
7. Tofindahotspot,aimthemeteroutsidetheareaofinterestthenscanacross(inanup
and
downorsidetosidemotion)untilthehotspotislocated.
DetectingMildew
Todetectmildew,takeaSurfaceTemperaturemeasurementasdescribedearlierbypointingthe
meteratthedesiredobject(s)andmovingthemeterslowly,notingthesurfacetemperatureof
theobject(s)undertest.
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AlsonotetheAirTemperature,DewPointTemperatureandRelativeHumiditytolearnhowthese
relationshipsaffectmildewpotential.The meterautomaticallydetectsthelikelihoodofmildew;
nonethelessitisusefultoseehowonemeasurementaffectsanotherandhowthecombinations
ofthesemeasurementsandcalculationsleadtoanaccuratemildewanalysis.
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ThelikelihoodofmildewishighertheclosertheSurfaceTemperatureistotheDewPoint
Temperature.(TheDewPointtemperaturetakestheRelativeHumiditymeasurementinto
account,sincethehighertheRH,thehighertheDewPointTemperature).
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ThemeterusestheAirTemperature(AT)andtheDewPointTemperature(DP)valuestocreatea
rangeoftemperaturesthatisdividedintothirds(seeaccompanyingdiagram).Theupper
boundaryistheAirTemperature(AT)andthelowerboundaryistheDewPointTemperature(DP).
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