User manual

EXTECHINSTRUMENTS
7IR300UV‐en‐GB_V1.01/16
UVLeakDetector
Injectasmallamountofflorescentdyeintothesystemundertest.Thedye/systemmixture
(refrigerant,forexample)willescapeandaccumulateatallleaksites.TurntheblueUVLEDson
intheSettingmodeandscanthesystem.Theresidueofthedyeattheleakcanbeeasily
observedundertheUVlight.DyesareavailableatmostHVACsupplyoutlets.

LocatingHotorColdSpots
Todetectahotorcoldspot,aimthethermometerataregionbeyond
thetargetandthenscantheentireregioninaslow,up/downmotion.



DistancetoSpotRatio(FieldofView)
Themeter’s fieldof view is 12:1(distance tospotratio). For example,if themeteris60cm (24
inches)fromthetarget(spot),thediameterofthetargetmustbeatleast5cm(2inches).Other
distancesareshownbelowinthefieldofviewdiagram.
Note that measurements should normally be made further than 60cm (24 inches) from the
target.Themetercanmeasurefromfurtherdistancesbutthemeasurementmaybeaffectedby
externalsourcesoflight. In addition,thespotsize may besolarge that it encompassessurface
areasnotintendedtobemeasured.


2.5cm@30cm 5cm@60cm 10cm@120cm
1”@12” 2”@24” 4”@48”

Itis necessary to ensure  thatthe sizeof thetarget is largerthan thespot size.The smallerthe
target,thecloserthedistanceshouldbe.





