TheO-ringseal isthemainbarrierbetweenthewateroutsideandtheair space within
thecamera.Itisaneffectivebarrieronlyifthesealisproperlymaintained.TheO-ring
seal shouldbeinspectedbeforeeverydive.Thefollowing informationisprovidedfor
guidance inusingandmaintainingtheO-ringseal.
4.2MaintainingtheO-ringSeal
If the mainbodytolidO-ringsarenot installed, installthe O-ringsbeforediving.Theircareand
maintenancearecriticaltothe watertightintegrityof thehousing.If theO-ringsarecontaminated,
ornot alreadyinstalled;inspect, greaseand installthe O-ringsaccording tothe following
guidelines.
4.3Inspection, cleaningandre-instillationoftheO-rings
Tools
Asoft cotton bud orspongeapplicator-makesurethesearefree of allcontamination suchas
loosefibers,and the tube ofsiliconegreasesuppliedwiththe housing. Noteothertypesof silicone
greasespecificallyforusewithunderwatercameraequipment can usuallyalsobeused.It is
advisedtocarryout the following procedureonafirmclean levelsurface, e.g.at atable, to
prevent skidding especiallywhen divingfromaboat.
WhentomaintaintheO-ringseal
Removethe O-ringperiodicallyforinspection.It isnot necessarytoremove, clean andre-install
the O-ring aftereverydiveprovidedthe O-ringsarenotbecomecontaminated. Asaruleof
thumbsset up the cameraand housing beforeaday sdiving.If the housing isrequired tobe
opened between divesforchangingmemorycardorre-chargingbatteries, makesuretheoutside
of the housing isthoroughlytoweled drybeforeopening up. Afterremoving thelidandservicing
the camera, replacethe lidstraight away, ratherthan leaving itlyingaround. Beforereplacingthe
lid, check the o-ringsand makesurethat no contamination suchasdust, hair, salt, sand etc. has
fallenontothe O-ring orO-ring recess,asaprecaution werecommend toinspectthe O-ring every
timethe lidisopenedand tocarryoutthe maintenanceonlyif necessary.
Procedure
lPlacethelidon afirmnon-sliplevelsurface.
lThe O-ring canbe extractedusing anO-ring extractortool(makesurethetoolhasno sharp
edges).Alternativelyusethe flatsofthe thumbstogentlystretchthe O-ring on twofacesthus
making asmallloopprotruding afewmm. T he loopcanthenbegraspedbetween fingerand
thumbtopullthe O-ringoverthe lip.
lCleantheO-ringrecess (the squaregroovewherethe O-ringsits)withacotton bud orsponge