Reichert AR200 User manual
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AR200
Refractometer
User’s Guide
Page2
Reichert AR200 Instruction Manual
Table of ContentsPage
1.0 Introduction 3
2.0 Specifications 4
3.0 EnvironmentalConditions 5
4.0 Care and Cleaning 5
4.1 Care of Prism Surface 5
5.0 InstrumentFeatures 6
6.0 AutomaticTemperatureCompensation 7
6.1 Temperaturecoefficientandcorrectioncalculations 7
7.0 InstallationProcedure 7
7.1 Set Up 8
8.0 Sample Reading 10
9.0 MenuOptions 11
10.0 Daily Single Point Calibration 12
11.0 Multipoint Calibration 13
11.1 CalibrationOils 14
12.0 Channels 15
12.1 Channel 1– Brix (Sucrose per ICUMSA) 15
12.2 Channels2– 4, User Programmable 15
13.0 Accessories 15
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1.0 INTRODUCTION
Congratulationsonyourpurchaseofthe ReichertAR200
DigitalHandheld Refractometer.This manual describes
theproper operation and careofthis state of theart
instrument.TheAR200is capable of measuring %
Solids(Brix),%Solids-TC(Brix-Temperature
Compensated),RefractiveIndex andRefractiveIndex-
TC(temperatureCompensatedperICUMSASucrose
temperatureCoefficient).Althoughit’smain purpose is
toaidquality control personnel in Food andBeverage
applicationsit’s advanced features make it a well suited
instrumentwidelyusedfor Medical, Pharmaceutical,
IndustrialFluids,Chemical and PetrochemicalIndustries.
AnAR200hasthecapabilitytomeasure Refractive
Index(nD)ofliquidsolutions to a precision of +/-
0.0001or % Solids (Brix) to +/-0.1 with a range of 1.3300
to 1.5600nD and 0 to 95% Solids (Brix).
Pleasenotethat anAR200Refractometerisa high
precisionopticalinstrument.Itisabsolutelynecessary to
properlymaintaintheinstrumenttoobtain the best
possibleaccuracy.Thisincludesthoroughlycleaningthe
prismandwellaftereachsampleandroutinely
calibratingtheinstrument.Alwaysstoretheinstrument
withthewell clean anddry.
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2.0 SPECIFICATIONS
·TheReichertAR200 operatesonfourAAAbatteries.
Theinstrument is capableof 3000+ readings ona set of
batteriesand has auto/off sleep modeafter 30 seconds
ofinactivityandlowbatterydetection.
·ThreeKeyOperation:
“CAL”,“READ”and “MENU”
withonscreenprompts.
·Illumination: 589 nm LED.
·Range: 1.3300to 1.5600 Refractive
Index(nD=589nmSodiumDline).
0 to 95% Solids, (Brix-Sucrose
perICUMSAin Channel 1).
Userdefinableinchannels 2 - 4.
·Readability: 0.0001 nD
0.1 % Solids.
0.1oCTemperature
·Accuracy: +/-0.0001nD
+/-0.1%Solids (Brix),
+/-0.2oCTemperature.
·TemperatureCompensation Range:
15o – 40oC (59o – 104o F) per ICUMSA in
Channel1,userdefinableincustom
channels.
·PrismAssembly:
Glass Prism sealed to Stainless Steel
Wellwithsolventresistantepoxy.
·Dimensions: 18cmx9cm x 3.5cm
(7”Lx3.75”Wx1.37”D)
.Weight: 410g
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3.0 ENVIROMENTAL CONDITIONS
·TemperatureRange: 10oC – 45oC
·Max.RelativeHumidity:80%fortemperaturesto31oC
decreasinglinearlyto50%(relative humidity at 40oC)
·PollutionDegree 2
·Altitudeupto 2,000 meters
4.0 CARE AND CLEANING
TheReichertAR200 is aprecisionopticalinstrument.
Theprismsurfaceandwellshouldbecleaned
immediatelyafteruse.Theinteriorcomponentsare
protectedfromdust,spills,andotherdamage.The
stainlesssteelwell and prism assembly issealedwith
corrosion-resistantepoxy.Allnon-opticalcomponents
canbecleanedwithsoap and water or methanol. Using
strongsolventssuchas N, N-Dimethylformamide orN,
N-Nimethylacetamide,cresols,phenolsand other tar
acidsshouldbeavoided,Tetrahydrofuranorsome
lacquerthinnersandtheircomponentscan also
deteriorate the prism seal over time or when applied at
elevatedtemperatures.DonotuseAcetone,Acetone
basedproductsorother harsh solvents when cleaning
theinstrument’sbodyorit’scomponents.
4.1 CARE OF PRISM SURFACE
Theprismsurfaceshouldbecleanedimmediatelyafter
use.Theuse of strong acidsorbases should not be
measuredwiththisinstrumentorusedascleaning
agents.Donotuse any metal or sharp objectstoclean
or pry loose the prism seal or residue on the sample or
well.Thesampleshould be wiped off with amoisttissue.
Warmwaterand soap is recommended forremoving
sucroseresidue and oil-based samplesfollowed by a
distilledwatercleaning.Removeanyremainingmoisture
withadrytissue.
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5.0 INSTRUMENT FEATURES
Refertothefeatureslistedbelow.
1. Instrument Display – Digitally displays
measurementvalues,operator instructions and error
messages.
2. Keypad Controls –All three controls are softtouch
membranekeys,CAL/down,READ/up,MENU/
return. Thesekeysserveadualpurpose as function
keysandalsofacilitatemoving the displayed cursor/
highlighterwhenselecting themanyavailable
options.
·CAL – Prompts the user to perform a water
calibration.Alsois used asthe “Down” key to
allowscrollingwhenchanging menu options or
values.
·READ– Will read the sample in the well.Also
isusedasthe“Up”keytoscrollthrough
choiceswhenchangingmenuoptions and
values.
·MENU–Allowsentrytothemenuoptionsof
theAR200.Themenukeyalsofunctionsas
“Enter”,“Exit”or“Cancel”dependingonthe
menuscreenand/orthe on screen
instructions.
3. Sample Well –The sample well is made of Stainless
Steelwith a Glass Prismmountedtoitscenter.When
a sample is placed on the prism face, it is important
thatthesamplecovertheentireprismsurfaceto
attainanaccuratereading.
4. IR Window – Located on the bottom of theAR200, it
isusedtocommunicatewith your PC when cradled
intheoptionaldockingstation.
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6.0 AUTOMATIC TEMPERATURE COMPENSATION
Automatictemperaturecompensationcorrectsreadings
overarangeof temperatures.Asan example: Samples
taken at 15oC – 40oC are corrected to a reference
temperaturereadingof20oC.Temperaturecorrection or
controlisnecessarybecauserefractiveindexvaries
inverselywithtemperature,astemperature of sample
risesrefractiveindex falls and so as sampletemperature
dropsrefractiveindexwill rise. This feature can be used
inlieuofcontrollingthetemperatureoftheprismand
sample.Itis however necessary to AllowSamplesto
Temperature Equilibrate (sample must reach same
temperatureasprismsurface) so that theAR200can
properlycorrectfortemperature.
Theautomatictemperaturecompensationmodebuilt
intotheAR200 isbasedon the temperature coefficients
(∆nD/∆oC)of sucrose, per the ICUMSA scales. When
readingsaretaken in Index-TC(RefractiveIndex-
TemperatureCompensated)modethereadingisonly
validforSucrose(Brix)solutions.
6.1 Temperature Coefficient Calculations (non-Sucrose
samples)
Shouldyouneedtotemperaturecorrectrefractive index
valuesforsamplesotherthanthosethat are sucrose
based.Pleasedownload“TemperatureCoefficient
CalculationandTemperatureCorrection”at
www.reichert.com Analytical/Applications,orcontact
Reichert AnalyticalTechnicalSupport,716-686-4500.
7.0 INSTALLATION PROCEDURE
A. Unpackinstrumentfromcarton.Retainpacking material
forfuturestorage/protection/shipping.
B. Pleasenotethefollowing accessories:
InstructionManual
Batteries, fourAAA
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Reading Mode
7.1 SET UP
A. Turntheinstrumentoverandremovethebattery
coverbyrotating it in a counter clockwisedirection.
B. Installthe fourAAAbatteries in the direction
indicated.
C. Reinstallthebatterycoverand turninstrumentover.
D. Placetheinstrumentonasolid surface in an
environmentwherethetemperatureisstable. Be
suretokeepinstrumentawayfromheat or air
conditioningvents,whichcancausedraftsand
affectthe temperaturestability.Allowthe instrument
timetoreachroomtemperature.
E. TurntheAR200 on bypressingthe“MENU” key.
Thetitlescreenwillappearfollowedbyinstructions
toapplysample and press read. DONOT,apply
sample or press read at this time.
F. Select desired “Reading Mode” by pressing
“MENU” keyagainto enter menu options.
G. Use“READ” (Up) “CAL” (Down) keys toadvance
through mode options to “Reading Mode”, press
the“MENU” (Return)keywhenyousee the
followingscreen.
H. Usethe “UP” or “DOWN” keys toadvancethrough
“Reading” options, select “Brix – TC” mode for
Reichert AR200
Ver X.XX
Exit Menu
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thisexercise by highlighting and pressingthe
“RETURN” (MENU) key.
“Brix – TC” %Solids–Temperature
Compensated.
“nD” RefractiveIndex.
“Brix” % Solids.
“nD – TC” RefractiveIndex –
TemperatureCompensated.
Youwillthenexitthemenu screenandreturntothe
mainscreen.
I. Press“CAL” keyand follow instructions to add
sample,add “Distilled Water” asthe sample. Enough
distilledwater should be addedto cover the prism
surface,approximately3drops.Allow sample to
temperatureequilibratetoprism/well. Press “CAL”
keyagain.Observe the display for message
indicating “Set Point Cal Successful”.
J. Pressthe“READ” key and note the value on the
display,whichshouldbe“0.0Brix-TC,20.0o C”.
Pleasenotethatthe0.0Brix -TC reading can vary by+/
-0.1which is the acceptable tolerance of theAR200.
Apply water
CAL = Calibration
MENU = Cancel
0.0 Brix - TC
20.0o C
Set point cal
successful
Brix-TC
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8.0 SAMPLE READING
A. Cleananddrythe prism and well withasoftwipe,
whichwillleavenoresidueandrecommended
cleaningagents,soap and warm water,Methanol or
IsopropylAlcohol followedbydistilledwater.
B. Addenoughof the sample to cover prismsurface
and allow adequate time for sample to temperature
equilibrateto prism/well.
C. Press “READ”.
D. Notevalueondisplay.
E. Referencedirectionsin“Set Up” section to switch
betweenthefourmodes of measurement:
1. nD
2. Brix
3. nD - TC
4. Brix-TC
F. Comparereadingtoknownvalue.Noteany
differenceinwelltemperaturefromsamplereference
temperatureandadjustrefractiveindexreading
mathematically fromthe “RefractiveIndex”
displayed value, reference section 6.1.
1.3330 nD - TC
20.0o C
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