Hanna Instruments HI 95734 User manual

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Instruction Manual
HI 95734
Free & Total Chlorine
High Range ISM
www.hannacan.com ThisInstrumentisin
CompliancewiththeCEDirectives

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Allrightsarereserved.Reproductioninwholeorinpartisprohibitedwithoutthewrittenconsent
ofthecopyrightowner,HannaInstrumentsInc.
TABLE OF CONTENTS
PRELIMINARYEXAMINATION...........................................................................................3
GENERALDESCRIPTION..................................................................................................4
ABBREVIATIONS ...........................................................................................................4
SPECIFICATIONS ...........................................................................................................5
PRECISIONANDACCURACY ............................................................................................5
PRINCIPLEOFOPERATION..............................................................................................6
FUNCTIONALDESCRIPTION.............................................................................................7
GUIDETODISPLAYCODES .............................................................................................9
GENERALTIPSFORANACCURATEMEASUREMENT ..........................................................11
OPERATIONALGUIDE...................................................................................................14
MEASUREMENTPROCEDURE ........................................................................................15
VALIDATIONPROCEDURE .............................................................................................17
CALIBRATIONPROCEDURE............................................................................................18
BATTERYREPLACEMENT ...............................................................................................20
ACCESSORIES ............................................................................................................21
CEDECLARATIONOFCONFORMITY ................................................................................21
WARRANTY ............................................................................................................22
HANNALITERATURE ....................................................................................................22
USERNOTES ............................................................................................................23
DearCustomer,
Thank you for choosing a Hanna product. This manual will provide you with the
necessary information for the correct use of the instrument. Please read it carefully
before using the meter. If you need additional technical information, do not hesitate to
e-mail us at [email protected].
This instrument is in compliance with directives.

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PRELIMINARY EXAMINATION
Pleaseexaminethisproduct carefully.Make surethat theinstrumentisnotdamaged.Ifany
damageoccuredduringshipment,pleasenotifyyourDealer.
EachHI95734IonSelectiveMeterissuppliedcompletewith:
•TwoSampleCuvets andCaps
•9V Battery
• Scissors
•InstructionManual
•Rigidcarryingcase
Note:save all packing material until you are sure that the instrument works correctly.
Anydefectiveitemmustbereturnedinitsoriginalpacking.

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TheHI95734isanautodiagnosticportablemicroprocessor meterthatbenefitsfromHanna’s
yearsofexperienceasamanufacturerofanalyticalinstruments.Ithastheadvancedopticalsystem
basedonaspecialtungstenlampandanarrowbandinterferencefilterthatallowsmostaccurate
andrepeatablereadings.Allinstrumentsarefactorycalibratedandtheelectronicandoptical
designminimizestheneedoffrequentcalibration.
WiththepowerfulCALCHECKvalidationfunctionyouareabletovalidategoodperformanceof
yourinstrumentatany time.Thevalidation procedureisextremelyuserfriendly.Justusethe
exclusiveHannaready-made,Nisttraceablestandardstoverifytheperformanceoftheinstrument
andrecalibrateifnecessary.
Allinstrumentsaresplashwaterproofandthelampandfilterunitsareprotectedfromdustordirt
byatransparentcup.Thismakestheinstrumentsfulfillfieldapplications.Displaycodesaidthe
userinroutineoperation.Themeterhasanauto-shutofffeaturethatwillturnofftheinstrument
after10minutesofnonuseorafter1hourifleftinthe calibrationmode .
Themeterusesanexclusivepositive-lockingsystemtoensurethatthecuvetisinthesameposition
everytimeitisplacedintothemeasurementcell.Itisdesignedtofitacuvetwithalargerneck
makingiteasiertoaddbothsampleandreagents.Thecuvetismadefromspecialopticalglassto
obtainbestresults.
TheHI95734meter measuresthefreeandtotalchlorine(Cl2)contentinwatersamples inthe
0.00to10.00mg/L(ppm)range.ThemethodisanadaptionoftheUSEPAMETHOD330.5for
wastewater,andStandardMethod4500-ClGfordrinkingwater.
Thereagentsareinpowderandliquidformandaresuppliedinpacketsandbottles.Theamountof
reagentispreciselydosedtoensurethemaximumrepeatability.
GENERAL DESCRIPTION
ABBREVIATIONS
degreeCelsius
USEnvironmentalProtectionAgency
degreeFahrenheit
milligramsperliter.mg/Lisequivalenttoppm(partpermillion)
milliliter
°C:
EPA:
°F:
mg/L:
mL:

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Range FreeCl20.00to10.00mg/L
TotalCl20.00to10.00mg/L
Resolution 0.01mg/Lfrom0.00to3.50mg/L;0.10mg/Labove3.50mg/L
Precision ±0.06mg/L @ 3.00 mg/L
Typical EMC Deviation ±0.01 mg/L
Light Source Tungstenlampwithnarrowbandinterferencefilter@525nm
Light Detector SiliconPhotocell
Method AdaptationoftheUSEPAmethod330.5andStandardMethod4500-Cl
G.ThereactionbetweenchlorineandtheDPDreagentcausesapink
tintinthesample.
Environment 0to50°C(32to122°F);max95%RHnon-condensing
Battery Type 1x9volt
Auto-Shut off After10'ofnon-usein
measurementmode ;
after1hourofnon-usein calibrationmode .
Dimensions 180x83x46mm(7.1x3.3x1.8")
Weight 290g(10oz.).
REQUIRED REAGENTS
Code Unit Description Quantity/test
HI 93701-0 Free&TotalCl2DPDPowderReagent 1packet
HI 93734B-0 Free&TotalCl2Free&TotalCl2Reagent 5mL
HI 93734C-0 TotalCl2TotalCl2Reagent 3drops
SPECIFICATIONS
Precisionishowcloselyrepeatedmeasurementsagree
witheachother. Precisionisusuallyexpressedas
standarddeviation(SD).Accuracyisdefinedasthe
nearnessofatestresulttothetruevalue.
Althoughgoodprecisionsuggestsgoodaccuracy,
preciseresultscanbeinaccurate.Thefigureexplains
thesedefinitions.
Inalaboratoryusingastandardsolutionof3.00
mg/Lchlorineandarepresentativelotofreagent,an
operatorobtainedwithasingleinstrumentastandard
deviationof0.06mg/L..
PRECISION AND ACCURACY

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Absorptionoflightisatypicalphenomenonofinteractionbetweenelectromagneticradiationand
matter.Whenalightbeamcrossesasubstance,someoftheradiationmaybeabsorbedbyatoms,
moleculesorcrystallattices.
Ifpureabsorptionoccurs,thefractionoflightabsorbeddependsbothontheopticalpathlength
throughthematterandonthephysical-chemicalcharacteristicsofthesubstanceaccordingtothe
Lambert-BeerLaw: -log I/Io= ελc d
or
A = ελc d
Where:
-log I/Io= Absorbance(A)
Io= intensityofincidentlightbeam
I= intensityoflightbeamafterabsorption
ελ= molarextinctioncoefficientatwavelength λ
c = molarconcentrationofthesubstance
d = opticalpaththroughthesubstance
Therefore,theconcentration"c"canbecalculatedfromtheabsorbanceofthesubstanceasthe
otherfactorsareknown.
Photometricchemicalanalysisisbasedonthepossibilitytodevelopanabsorbingcompoundfrom
a specific chemical reaction between sample and reagents. Given that the absorption of a
compoundstrictly depends on the wavelength of the incidentlightbeam,a narrow spectral
bandwidthshouldbeselectedaswellasapropercentralwavelengthtooptimizemeasurements.
TheopticalsystemofHanna'sHI95seriescolorimetersisbasedonspecialsubminiaturetungsten
lampsandnarrow-bandinterferencefilterstoguarantee bothhigh performanceand reliable
results.
HI95seriesBlockdiagram(opticallayout)
PRINCIPLE OF OPERATION

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Amicroprocessorcontrolledspecialtungstenlampemitsradiationwhichisfirstopticallyconditioned
andbeamedtothesamplecontainedinthecuvet.Theopticalpathisfixedbythediameterofthe
cuvet.Thenthelightisspectrallyfilteredtoanarrowspectralbandwidth,toobtainalightbeamof
intensityIoorI.
ThephotoelectriccellcollectstheradiationIthatisnotabsorbedbythesampleandconvertsit
intoanelectriccurrent,producingapotentialinthemVrange.
Themicroprocessorusesthispotentialtoconverttheincomingvalueintothedesiredmeasuring
unitandtodisplayitontheLCD.
Themeasurementprocessiscarriedoutintwophases:firstthemeteriszeroedandthentheactual
measurementisperformed.
Thecuvethasaveryimportantrolebecauseitisanopticalelementandthusrequiresparticular
attention.Itisimportantthatboththemeasurement andthe calibration(zeroing) cuvetsare
opticallyidenticaltoprovidethesamemeasurementconditions.Wheneverpossibleusethesame
cuvetforboth.Itisnecessarythatthesurfaceofthecuvetiscleanandnotscratched.Thistoavoid
measurementinterferenceduetounwantedreflectionandabsorptionoflight.Itisrecommended
nottotouchthecuvetwallswithhands.
Furthermore,inorder tomaintainthesameconditionsduringthe zeroingand themeasuring
phases,itisnecessarytoclosethecuvettopreventanycontamination.
FUNCTIONAL DESCRIPTION
1) LiquidCrystalDisplay(LCD)
2) CuvetHolder
3) Cuvetalignmentindicator
4) ON/OFFkey
5) ZERO/SETkey
6) READ/TIMERkey
7) CALCHECKkey

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KEYPADDESCRIPTION
• ON/OFF:toturnthemeteronandoff.
• ZERO/SET:thisisabi-functionalkey:presstozerothemeterpriortomeasurement,orholdthe
keyfor3secondstoselectthedesiredparameter(freeortotalchlorine).
• READ/TIMER:thisisabi-functionalkey,justpressformakingameasurement,orholdthekey
for3secondstostartapre-programmedcountdownpriortomeasurement.
• CALCHECK:thisbi-functionalkeyallowstoperformvalidationoftheinstrumentjustpressing
theCALCHECKkey,orholdthekeyfor3secondstoenterthe
calibrationmode .
OPERATINGMODES
•
Measurement mode: defaultoperationmode,enablesbothvalidationandmeasurement.
• Calibrationmode: maybeentered bykeepingCALCHECKpressedforthreeseconds(the“CAL”
iconappears),itenablescalibrationoftheinstrument.
DISPLAYELEMENTSDESCRIPTION
1) fourdigitmaindisplayarea.
2) CAL:appearswhentheinstrumentoperatesinthe
calibrationmode.
3) theMonth andDay icons appear abovethe number of monthand day when a dateis
displayed.
4) theblinking“Battery”iconappearswhenthebatteryvoltageisgettinglow.

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Thisprompt appears for 1 second each time the instrument is
turnedon.
Theparametercode,“734f”forfreechlorineor“734t”fortotal
chlorine,indicatesthatthemeterisinareadystateandzeroing
canbeperformed.
SamplinginProgress.Thisflashingpromptappearseachtimethe
meterisperformingameasurement.
Thisindicatesthatthemeterisinazeroedstateandmeasurement
canbeperformed.
Lightoverrange:thecuvetisnotinsertedcorrectlyandanexcess
ambientlight is reaching the detector. Ifthecoveris properly
installed,thencontactyourdealerorthenearestHannaCustomer
ServiceCenter.
Theblinking"BAT"indicatesthatthebatteryvoltageisgettinglow
andthebatteryneedstobereplaced.
Thisindicatesthatthebatteryisdeadandmustbereplaced.Once
thisindication is displayed,themeter will lock up.Changethe
batteryandrestart.
“Configuration”: this indicates that the meter has lost its
configuration.ContactyourdealerorthenearestHannaCustomer
ServiceCenter.
CALIBRATIONMODE MESSAGES
ThedateofthelastcalibrationappearsontheLCDeachtimethe
calibrationmode isentered.Ifcalibrationisperformedforthefirst
time,“F.CAL”appears.
Thisindicatesthatthefactorycalibrationisselected.
GUIDE TO DISPLAY CODES

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Theflashingdigitsindicatethat:
1)themonthcanbeset
2)thedaycanbeset
“Storage”:this prompt appears for1secondat the end of the
calibrationprocedure,to indicate thatthecalibration datahas
beenstored.
“Error”:theconcentrationofthecalibrationsolutionusedisnotcorrect.
Repeatthecalibrationprocedurewiththerightstandardsolution,
andverifyitisnotexpired.Ifthecalibrationprocedurefailsagain,
contactyourdealerorthenearestHannaCustomerServiceCenter.
ERROR MESSAGES
a)onzeroreading
Thisindicatesthatthezeroingprocedurefailedduetoalowsignal-to-
noiseratio.InthiscasepressZEROagain.
“NoLight”:theinstrumentcannotadjustthelightlevel.Pleasecheck
thatthesampledoesnotcontainanydebris.
“LightLow”:thereisnotenoughlighttoperformameasurement.
Pleasecheckthepreparationofthezerocuvet.
“LightHigh”:thereistoomuchlighttoperformameasurement.
Pleasecheckthepreparationofthezerocuvet.
b)onsamplereading
Thereistoomuchlightforthesamplemeasurement.Pleasecheckif
therightsamplecuvetisinserted.
“Inverted”:thesampleandthezerocuvetareinverted.
“Zero”:azeroreadingwasnottaken.Followtheinstructioninthe
measurementprocedureforzeroingthemeter.