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RayTek FA Thermometer User Manual

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Maintenance

48 MarathonSeriesFA/FR

10.3CleaningtheLens

Keepthelenscleanatalltimes. Anyforeignmatteronthewi ndowwill affect1‐colormeasurement

accuracyandmayaffecttwo‐coloraccuracy.However,careshouldbeta kenwhencleaningthelens.

Tocleanthewindow,dothefollowing:

1. Lightlyblowofflooseparticleswith“canned”air(used

forcleaningcomputerequipment)or

asmallsqueezebellows(usedforcleaningcameralenses).

2. Gentlybrushoff  anyremainingparticleswith asoft camelhairbrush ora softlens tissue

(availablefromcamerasupplystores).

3. Cleanremaining“dirt”usingacottonswaborsoftlenstissuedampened

indistilledwater.

Donotscratchthesurface.

Forfingerprintsorothergrease,useanyofthefollowing:

• Denaturedalcohol

• Ethanol



Applyoneoftheaboveto thelens.Wipe gentlywithasoft,cleanclothuntilyouseecolorsonthe

surface,thenallowtoairdry.Do

notwipethesurfacedry,thismayscratchthesurface.

Ifsilicones(usedinhandcreams)getonthewindow,gentlywipethesurfacewithHexane.Allowto

airdry.



Donotuseanya mmoniaoranycleanerscontainingammoniato cleanthelens.This

mayresultinpermanentdamagetothelens’surface!

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