User manual

4RH30‐en‐GB_v1.57/15
DewPointTemperature
DewPointisawindowintotherelationshipbetweenTemperatureandHumidity.Forexample,if
air is cooled at a constant (absolute) humidity, the relative humidity will steadily increase to a
maximumof100%. Iftheairiscooledfurther,theexcesswatervaporwillseparateinthe
form
ofwaterdroplets.IftheRH30indicatesanairtemperatureof20
o
C(60
o
F)andarelativehumidity
of65%,thedew‐pointtemperaturewillbe13.2
o
C(56
o
F).Thismeansthatifwallsorceilingsina
living area are cooler than 13.2
o
C (56
o
F), the air will condense and form droplets on the walls
andceilingsurfaces.Moldanddamppatchescanresult. Inthissameexample,whentherelative
humidityoftheairis40%,thedewpointtemperatureisonly6
o
C(43
o
F).Surfaceswouldhaveto
besignificantlycolderfortheairtoreachitsdewpointtoformwaterdroplets.
TipsonAchievingOptimumAmbientConditions
o Checkthatthedewpointtemperatureofwallsisatleast15
o
C(59
o
F).
o Donotswitchoffhomeheatingcompletelywhenleavingthehouse.
o Ventilateforshortperiodsonlyinallweatherconditions,evenduringrain.
o Airroomsbyopeningwindowsforashorttimeonly.Partiallyopenedwindowsforprolonged
periodsdonotyieldthedesiredresults,wasteenergy,
andcanfurtherpromotethegrowthof
mold.
o If room air is too dry (as it tends  to be in winter), humidifier units are highly recommended
sinceairingatlowoutdoortemperatureswilltendtodecreasehumidityfurther.

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Specifications
Display  Multi‐functionLCD
Sensor  Precisionhumiditysensorforquickandaccuratereadings
Measurementrange RelativeHumidity:1.0to99.0%RH
AirTemperatureand
DewPointTemperature: ‐10to50
o
C(14to122
o
F)
Resolution 0.1
o
C(
o
F)and%
HumidityAccuracy ±4%from35%to75%otherwise±5%
Temp.Accuracy ±1.0
o
C(1.8
o
F)
Powersupply 2x1.5VAAbatteries
Dimensions 95x25x95mm(3.7x1.0x3.7")
Weight  90g(3.2oz.)instrumentonly,batteriesnotincludedinweightspec.
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Copyright©2013‐2015FLIRSystems,Inc.
Allrightsreservedincludingtherightofreproductioninwholeorinpartinanyform
ISO-9001 Certified
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