
SENS– R-TROL
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Hereareafewwordstohelpyou understand howthe
Sens-R-Trolworks.
Sens-R-Trolmeasurethelevelofbromineorchlorine
yourpoolorspa.
Onselectingthe‘setlevel’bymeansofthelevel
adjusting knob, Sens-R-Trolwillactivateyour
brominatororchlorinatorasandwhenrequiredto
maintainthislevel.
Ideallythewatershouldbe‘chemicallybalanced’.
Waterbalanceisthetermusedtodescribethe
interactionofpH,totalalkalinity, and calciumhardness.
Inparticular,you shouldtrytokeepastablepHinthe
7.2–7.8rangebymaintainingtotalalkalinitywithinthe
80 –160mg/lrange.Ifthetotalalkalinityfallstoolow
‘pHbounce’willoccur.ThepHwill jumpfromhigh to
lowand backagainandthesensorwill beunableto
operatecorrectly.
It mayalsonecessarytocontrolthebuildupoforganic
matterbyregularshockdosingthepoolorspa.The
buildup oftotaldissolvedsolidscan becontrolledby
theregularremovalofaquantityof poolwaterand
replacing it withfreshwater.Notjusttoppingup
evaporationlosses.
Justhowoftenyouneedtocheck thetotalalkalinityand
pHisdeterminedbyexperienceand largelydepends
upon watervolume,batherload and sanitiserused. For
example,aresidentialpoolmayneedtobechecked
every2-3weeks whileaheavilyusedcommercialspa
wouldrequiredailychecking.
Similarly,theneedforshockdosingwillvarybuthere
aresomegood guidelines:-
*Afteran unusuallyheavy load likeapool
party.
*Afteraheavyrainstorm,withan openair
pools.
*If everthebromine residualfallsbelow1mg/l
orthechlorine residualfallsbelow0.5mg/lfor
twodaysinarow.
*Forfurtherinformation andamoredetailed
description ofbalanced waterrefertothe
PrimeMixBookletson:-
*Balanced Water
*PoolWaterTesting
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Thesensormeasuresthe‘RedoxFactor’ofthewater.
Thisistheabilityofthewatertooxidiseand thus
sanitiseorkill germs.Theredoxvaluethatthesensor
measureisthesumtotalofthree parts.
Firstly,the‘basevalue’ofthewater, whichvariesfrom
onelocation toanother.
Secondly, the‘combinedchlorinevalue’, whichhasvery
littlegermkillingpower.
Thirdlythe‘free availablechlorineorbrominevalue’,
whichisameasureof thegermkilling abilityofthe
water.
Itisimportanttobeawarethat allthree component
valuesarecapableof changingunderdifferent
conditionstomakethetotalredoxvalue.
ThebasevalueincreaseswithadecreaseinpHsothat
aslightlyhigher‘totalsetting’isnecessarytomaintaina
given‘free availableorgermkilling abilityofthewater’.
Also,the‘combinedchlorinevalue’increaseswitha
veryhigh batherload, increasedorganicdebris(caused
bybodywastes,suntan oilsetc.)and ahightotal
dissolvedsolidshencerequiringaslightlyhigher
setting.
Factorssuchastemperatureand dissolvedoxygenin
thewaterdo affectthesettingbut onlytoaminor
degree. However, itisbesttohaveaspaatits
operating temperaturewhendetermining settings.
Asettingwhichistoo lowwillfavouran increaseinthe
combinedchlorinevalueand thusareductionofgerm
killingability.
Agoodqualitytest kit shouldalwaysbeused. This
ensurestheaccuratedeterminationof values.
Thecombinedchlorineshouldneverbeallowedto
becomemorethanhalfthetotal.
Shock dosing willeliminatecombinedchlorine.
Thecombinedresidualinabrominepoolorspais
nearlyalways theresultof organicdebris. Page3/