Extech Instruments CL500 User manual

USERGUIDE


FreeandTotalChlorineTester
PatentPending


ModelCL500






www. .com [e-mail]1.800.561.8187

CL500-en-GB_V1.2 8/15
2
Introduction
CongratulationsonyourpurchaseoftheCL500chlorinetester.TheCL500isarevolutionaryfirst
ofitskindmeasurementdevicethatmeasuresfreeandtotalChlorinefrom0.00to3.50ppm.
TheelectrodemethodemployedisapprovedbytheU.S.EnvironmentalProtectionAgency(EPA)
asanacceptablemethodforwastewatercompliancemonitoringoftotalchlorine.Forthistype
ofelectrodemethod,areagenttabletmustbeaddedtothemeasurementsolutionbefore
testing.TheadvantagesoftheCL500fortheuserinclude:easytouseandmaintain,high
accuracy,self‐calibration,andfastresponse.Thismeterisshippedfullytestedandcalibrated
and,withproperuse,willprovideyearsofreliableservice.Pleasevisitourwebsite
(www.extech.com)tocheckforthelatestversionofthisUserGuide,ProductUpdates,and
CustomerSupport.
Applications
TheCL500canbeusedwhereverameasurementofthetotalchlorineinwaterasneeded.This
isalsoreferredtoastotalresidualchlorine.Itmeasuresthetotalofallchlorinepresentinall
forms,includingdissolvedfreechlorine,chloramines,hypochlorousacid,andhypochloriteion.
TypicalapplicationsincludeTotalChlorinemeasurementsofdischargewaterfromwater
treatmentplants,publicdrinkingwatersuppliesandcoolingtowers,andfreechlorine
measurementsofthedisinfectantpropertiesinswimmingpoolsandcoolingwater
applications.
MeterDescription
CL500FrontPanelDescription
1. TestBottleChamber
2. TestBottleChamberlatch
3. LCDdisplay
4. POWERbutton
5. HOLDbutton
6. REC‐MAX‐MINbutton
7. ZERObutton
8. TEST‐CALbutton
9. Testbottle

www. .com [e-mail]1.800.561.8187

CL500-en-GB_V1.2 8/15
3
GettingStarted
EquipmentRequired
Achlorinetestrequiresa10mlsamplebottle,reagentpowderfortestingFreeandTotal
chlorine,andtheCL500meter.
MeasurementProcedure
Calibrationconsiderations
1. Ensurethatthemeterhasbeencalibratedpriortouse.
2. Refertothecalibrationsectionforthisprocedure.

Testsample“Zero”measurement
Note:Priortotesting,setthemetermodetoFREEorTOTALbasedonthedesiredtest
method.SeeModeSelection.
1. ThemetershouldbeintheOFFposition.
2. Placethetestsampleintothesamplebottleuptothe10mLline(minimum).Placethe
caponthebottleandtighten.
3. Cleananddrytheoutsideofthesamplebottletoensureacleansurface.
4. Openthecoverofthetestchamberandinsertthebottlecompletelyintothechamber.
5. Lineupthewhitemarkonthebottlewiththewhitemarkofthetestchamber.
6. Closethecoverandlockitinplace.
7. Pressthe“POWER”buttontoturnthemeterON.Thedisplaywillshow‘Free’or‘Total’
for1secondandthen‘CAL0’.Themeterisnowreadyforthe“zero”test.
8. Pressthe“Zero”button,thedisplaywillflash“tEST”andthen“0.00”ppm.TheZeroTest
isnowcomplete.Donotpowerdownthemeter.
MeasurementofTestSolution
1. Openthetestchamberandremovethetestbottle.
2. AddtherequiredDPDpowder(FreeorTotal)intothesampleandthenshakefor20
secondsuntilcombined.Placethecaponthebottleandtighten.
FortheFreeChlorinetest,usetheFreeChlorineDPDpowder
FortheTotalChlorinetest,usetheTotalChlorineDPDpowder
3. Cleananddrytheoutsideofthesamplebottletoensureacleansurface.
4. Wait2minutebeforeplacingthetestbottleintothemetertoallowtimeforthesolution
tomixthoroughly.
5. Openthecoverofthetestchamberandinsertthebottlecompletelyintothechamber.
6. Lineupthewhitemarkonthebottlewiththewhitemarkofthetestchamber.
www. .com [e-mail]1.800.561.8187

CL500-en-GB_V1.2 8/15
4
7. Closethecoverandlockitinplace.
8. Pressthe“Test”button.Thedisplaywillflash“tEST”forabout10secondsandthenthe
resultswillappear.
Note:Cleanandrinsethetestbottlewithdistilledwateraftereachtest.
DataHOLD
PresstheHOLDbuttononcewhiletakingameasurementtofreezethevalueonthedisplay.
PressHOLDagaintoreleasethedataholdfunction.
DataRecord(MAX/MINReadings)
1. TheDatarecordfunctionrecordstheMAXandMinreadings.
2. Press"REC"buttononcetobeginDatarecording.TheLCDwilldisplaythe"REC"symbol.
3. ToviewtheMAXvaluewhileintherecordingmodepress"REC"once.Thedisplaywillshow
themaximumreadingand“RECMAX"willshowontheLCDdisplay.
4. Press"REC"buttononceagainand"RECMIN"willdisplayontheLCDalongwiththe
minimumreading.
5. ToerasetheMaxvalueandcontinuerecording,whileintherecordmode,momentarily
pressthe“Rec”button.Thedisplaywillshow“RECMAX”.Momentarilypressthe“HOLD”
button,thedisplaywillnowshow“REC”.TheMaxvaluehasbeenerased.
6. ToerasetheMinvalueandcontinuerecording,whileintherecordmode,momentarilypress
the“Rec”button.Thedisplaywillshow“RECMAX”.Pressthe“REC”buttononceagainand
nowthedisplaywillshow“RECMIN”.Momentarilypressthe“HOLD”button,thedisplaywill
nowshow“REC”.TheMinvaluehasbeenerased.
7. ToexitRecordmode,pressthe“REC”buttonfor3seconds.Thedisplaywillreturntothe
currentreading.
ModeSelection–FreeorTotal
1. ThemetershouldbepoweredOFF.
2. Pressthe"HOLD"and"REC"buttonssimultaneouslyandthenmomentarilypressthe
"Power"button.
3. Pressthe"TEST"buttontoselectthedesiredfunction(FreeorTotal)Chlorine.
4. Pressthe"REC"buttontoconfirmandsavetheselectionintomemory.
5. Momentarilypressthe“Power”buttontoturnoffthemeter.
Auto‐PowerOFF
TheautopowerofffeatureautomaticallyswitchestheCL500OFF10minutesafterthelastkey
press.

www. .com [e-mail]1.800.561.8187

CL500-en-GB_V1.2 8/15
5
CalibrationProcedure
TheCL500canbecalibratedforFreeorTotalChlorinemeasurements.
Priortocalibration,settheMetertoeithertheFreeorTotalmode.
ZeroCalibrationProcedure
1. Pressthe“Power”buttontoturnthemeterON.ThedisplaywillshowFreeorTotalandthen
“CAL0”.
2. Pressthe“Zero”button,thedisplaywillflash“tEST”forabout10secondsandwillthenshow
“0.00”.ppm.
3. PressandholdtheCALbuttonuntil“CAL”appearsonthedisplay.ReleasetheCALbutton.
4. CleanthesidesoftheZeroChlorinesolutionbottleandinsertitintothetestingchamber.
5. Lineupthewhitemarkonthebottlewiththewhitemarkinthechamberandclosethecover
andlatchit.
6. Press"CAL"oncemoreandthedisplaywillflash“tEST”andshowthefollowing:





7. Themeterisnowreadyfor"zerochlorine"calibration.
8. Press"CAL"buttononce.TheLCDwillflash“CAL”for10secondsandwillthenshowthe
followingdisplay:




9. TheLCDwillthendisplay:





10. ZeroChlorinecalibrationisnowcomplete.Themeterisnowreadyforthe1.00ppmTest
solutioncalibration.



0.00
CAL ppm
CAL
0.00 ppm
1.00
CAL ppm
www. .com [e-mail]1.800.561.8187

CL500-en-GB_V1.2 8/15
6
1.00‐ppmTestsolutioncalibration
1. Cleanthesidesofthe1.00‐ppmChlorinestandard(FreeorTotal)solutionbottleandinsert
itintothetestingchamber.
2. Lineupthewhitemarkonthebottlewiththewhitemarkinthechamber,close,andlatch
thecover.
3. Press"CAL"oncemore;thedisplaywillflash“CAL”andthenshowthefollowing:




4. WhencalibrationiscompletetheLCDwillreturntothenormaloperatingmodeand
measurethetestsolution.Thedisplayshouldshow1.00ppm.
5. Themeterisnowreadytomeasuretestsolutions.


CAL
1.00 ppm
www. .com [e-mail]1.800.561.8187

CL500-en-GB_V1.2 8/15
7
Maintenance
LowBatteryIndication
Whenthebatteriesbecomeweakthe“ ”iconwillappearinthedisplay.Refertothebattery
replacementinformationbelow.
BatteryReplacement
1. Onthebackofthemeter,removethe2screwsholdingthebatterycoverinplace.
2. Replacethesix(6)AAAbatteries,observingpolarity.
3. Replacethebatterycompartmentcover
BatterySafetyReminders
1. Neverdisposeofbatteriesinafire.Batteriesmayexplodeorleak.
2. Nevermixbatterytypes.Alwaysinstallnewbatteriesofthesametype.

Neverdisposeofusedbatteriesorrechargeablebatteriesinhouseholdwaste.
Asconsumers,usersarelegallyrequiredtotakeusedbatteriestoappropriate
collectionsites,theretailstorewherethebatterieswerepurchased,orwherever
batteriesaresold.
Disposal:Donotdisposeofthisinstrumentinhouseholdwaste.Theuseris
obligatedtotakeend‐of‐lifedevicestoadesignatedcollectionpointforthe
disposalofelectricalandelectronicequipment.

Electrodeconsiderations
TheCL500ChlorineElectrodearrivesinafactory‐cleanedconditionandisreadytobeused.The
electrodewillperformbestandyieldmorestablereadingsafterthefirstfewtests.
CleaningtheMeter
Occasionallywipethemeterhousingwithadampcloth.Donotuseabrasivesorsolvents.

www. .com [e-mail]1.800.561.8187

CL500-en-GB_V1.2 8/15
8
Specifications
DisplayLCDsize:1.6x1.3”(41mmx34mm)
Operatingconditions 0to50°C(32to122°F)and<80%RH
Chlorinerange0.00to3.50ppm(TotalChlorine)
0.00to3.50ppm(FreeChlorine)
Resolution 0.01ppm
Accuracy0.02[email protected]ppm
LightSource LED,525nm
LightDetectorPhotoDiode
ResponseTimeLessthan10seconds
SampleVolume10mLminimum
SampleTimeApproximately1second
PowerSix1.5Vbatteries
PowerConsumptionStand‐ByMode:approx.4mADC
TestingMode:approx.12mADC
Dimensions155x76x62mm(6.1x3.0x2.4”);320g(0.70lbs.)
AutoPowerOFFAutomaticallyswitchesOFF10minutesafterthelastkeypress
MethodThemeasuringmethodisanadaptationoftheUSEPAmethod330.5
andstandardmethod4500‐ClG

Copyright©2014‐2015FLIRSystems,Inc.
Allrightsreservedincludingtherightofreproductioninwholeorinpartinanyform
ISO‐9001Certified
www.extech.com
www. .com [e-mail]1.800.561.8187