Teledyne Oxygen Equipment 3300PA User Manual

OPERATING INSTRUCTIONS FOR  
Model 3300PA  
Percent Oxygen Analyzer  
SERIES 3300 PERCENT OXYGEN  
SAMPLE  
SPAN  
Teledyne Analytical Instruments  
DANGER  
HIGHLY TOXIC AND OR FLAMMABLE LIQUIDS OR GASES MAY BE PRESENT IN THIS MONITORING  
SYSTEM.  
PERSONAL PROTECTIVE EQUIPMENT MAY BE REQUIRED WHEN SERVICING THIS SYSTEM.  
HAZARDOUS VOLTAGES EXIST ON CERTAIN COMPONENTS INTERNALLY WHICH MAY PERSIST  
FOR A TIME EVEN AFTER THE POWER IS TURNED OFF AND DISCONNECTED.  
P/NM69127  
08/06/99  
ECO#99-0323  
ONLYAUTHORIZEDPERSONNELSHOULDCONDUCTMAINTENANCEAND/ORSERVICING. BEFORE  
CONDUCTING ANY MAINTENANCE OR SERVICING CONSULT WITH AUTHORIZED SUPERVISOR/  
MANAGER.  
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Contents  
Introduction  
1.1 Overview........................................................................ 1-1  
1.2 Main Features of the Analyzer ....................................... 1-1  
1.3 Front Panel Description.................................................. 1-2  
1.4 Rear Panel Description .................................................. 1-3  
OperationalTheory  
2.1 Introduction .................................................................... 2-1  
2.2 Micro-Fuel Cell Sensor .................................................. 2-1  
2.2.1 Principles of Operation .......................................... 2-1  
2.2.2 Anatomy of a Micro-Fuel Cell................................. 2-2  
2.2.3 Electrochemical Reactions .................................... 2-3  
2.2.4 The Effect of Pressure............................................ 2-3  
2.2.5 Calibration Characteristics ...................................... 2-4  
2.3 Electronics ..................................................................... 2-5  
2.3.1 General .................................................................. 2-5  
2.3.2 Signal Processing.................................................. 2-5  
Installation  
3.1 Unpacking the Analyzer................................................. 3-1  
3.2 Location and Mounting .................................................. 3-2  
3.2.1 Control Unit Installation.......................................... 3-2  
3.2.2 External Probe Installation ..................................... 3-2  
3.2.3 Installing the Micro-Fuel Cell ................................. 3-2  
3.3 Electrical Connections ................................................... 3-3  
3.4 Gas Connections ........................................................... 3-6  
3.5 Installation Checklist ...................................................... 3-6  
Operation  
4.1 Introduction .................................................................... 4-1  
4.2 Using the Function and Data Entry Buttons ................... 4-2  
4.3 Setting the Analysis Ranges.......................................... 4-2  
4.3.1 HI Range ............................................................... 4-2  
4.3.2 LO Range .............................................................. 4-3  
4.4 Setting the Alarm Setpoints............................................ 4-3  
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4.4.1 Alarm 1 .................................................................. 4-3  
4.4.2 Alarm 2 .................................................................. 4-3  
4.4.3 Sensor Fail Alarm .................................................. 4-4  
4.5 Selecting a Fixed Range or Autoranging ....................... 4-4  
4.6 Calibration ..................................................................... 4-4  
Maintenance  
5.1 Replacing the Fuse........................................................ 5-1  
5.2 Sensor Installation or Replacement ............................... 5-2  
5.2.1 When to Replace a Sensor .................................... 5-2  
5.2.2 Ordering and Handling of Spare Sensors .............. 5-3  
5.2.3 Removing the Micro-Fuel Cell ............................... 5-3  
5.2.4 Installing a Micro-Fuel Cell .................................... 5-3  
5.2.5 Cell Warranty Conditions ....................................... 5-4  
Appendix  
A.1 Specifications ................................................................ A-1  
A.2 Spare Parts List ............................................................. A-2  
A.3 Reference Drawing ........................................................ A-3  
A.4 Miscellaneous................................................................ A-3  
A.5 Material Safety Data Sheet ............................................ A-3  
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DANGER  
COMBUSTIBLE GAS USAGE WARNING  
This is a general purpose instrument designed for usage in a  
nonhazardous area. It is the customer's responsibility to ensure  
safety especially when combustible gases are being analyzed  
since the potential of gas leaks always exist.  
The customer should ensure that the principles of operating of  
this equipment is well understood by the user. Misuse of this  
product in any manner, tampering with its components, or unau-  
thorized substitution of any component may adversely affect  
the safety of this instrument.  
Since the use of this instrument is beyond the control of  
Teledyne, no responsibility byTeledyne, its affiliates, and agents  
for damage or injury from misuse or neglect of this equipment is  
implied or assumed.  
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Percent Oxygen Analyzer  
Introduction 1  
Introduction  
1.1 Overview  
TheTeledyneElectronicTechnologiesAnalyticalInstruments(TETAI)  
Model3300PAisamicroprocessor-basedpercentoxygenanalyzerforreal-  
timemeasurementofthepercentofoxygenininertgases,orinawidevarietyof  
gasmixtures.Itfeaturessimpleoperation,fastresponse,andacompact,rugged  
construction.TypicalapplicationsoftheModel3300PAaremonitoringnitrogen  
generatorsandinertgasblanketingapplications.  
1.2 Main Features of the Analyzer  
Themainfeaturesoftheanalyzerinclude:  
Highresolution,accuratereadingsofoxygencontentfrom0-1 %  
through0-25 %,with0-100%rangeoptional. Large,bright,light-  
emitting-diodemeterreadout.  
Simplepushbuttoncontrols.  
Nyloncellholder.  
AdvancedMicro-FuelCell,forpercentanalysis,hasatwoyear  
warrantyandanexpectedlifetimeof3years.  
Unaffectedbyoxidizablegases.  
Fastresponseandrecoverytime.  
Microprocessorbasedelectronics:8-bitCMOSmicroprocessor  
with on-board RAM and 16 KB ROM.  
Twouserselectableranges(from0-1 %through0-25 %)allowbest  
matchtousersprocessandequipment.  
Air-calibrationrangeforconvenientspanningat20.9 %.  
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1 Introduction  
Model 3300PA  
OperatorcanselectAutoranging,whichallowstheanalyzerto  
automaticallyselecttheproperpresetrangefor agiven  
measurement,orhecanlocktheanalyzerontoasinglerange.  
Twoconcentrationalarmswithadjustablesetpoints.  
Sensorfailurealarm.  
Threeanalogoutputs:twoformeasurement(010V dc,and  
negativeground420mA dc)andoneforrangeidentification  
(0-10 V dc).  
CompactandruggedControlUnitwithflush-panelcase.Designed  
forindooruse.  
1.3 Front Panel Description  
Allcontrolsanddisplaysexceptthepowerswitchareaccessiblefromthe  
frontpanel.SeeFigure1-1.Thefrontpanelhassevenpushbuttonmembrane  
switches,adigitalmeter,andanalarmindicatorLEDforoperatingtheanalyzer.  
ThesefeaturesaredescribedbrieflyhereandingreaterdetailinChapter4,  
Operation.  
Figure 1-1: Front Panel  
FunctionKeys:Sevenpushbuttonmembraneswitchesareusedtoselect  
thefunctionperformedbytheanalyzer:  
Set Alarm 1  
SetsAlarm1HiorLow,andtheconcentration  
atwhichalarm1 activates.  
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Percent Oxygen Analyzer  
Introduction 1  
Set Alarm 2  
Sets the Alarm 2 Hi or Low, and the  
concentrationtowhichalarm2activates.  
Set HI Range  
Set LO Range  
Span  
Setthehighanalysisrangefortheinstrument(up  
to 0-25 %).  
Setthelowanalysisrangefortheinstrument  
(down to 0-1 %).  
Spancalibratetheanalyzer.  
DataEntryKeys:Twopushbuttonmembraneswitchesareusedto  
manuallychangemeasurementparametersoftheinstrumentastheyaredisplayed  
ontheLEDmeterreadout:  
UpArrow  
Incrementvaluesofparametersupwardsasthey  
aredisplayedontheLEDreadout.  
DownArrow  
Incrementvaluesofparametersdownwardsas  
theyaredisplayedontheLEDreadout.  
DigitalLEDReadout: ThedigitaldisplayisaLEDdevicethat  
produceslarge,bright,7-segmentnumbersthatarelegibleinanylighting  
environment.Ithastwofunctions:  
MeterReadout: Asthemeterreadout,itdisplaystheoxygen  
concentrationcurrentlybeingmeasured.  
MeasurementParametersReadout: Italsodisplaysuser-  
definablealarmsetpoints,ranges,andspancalibrationpointwhen  
theyarebeingcheckedorchanged.  
1.4 Rear Panel Description  
Therearpanelcontainstheelectricalinputandoutputconnectors. The  
connectorsaredescribedbrieflyhereandindetailintheInstallationchapterof  
thismanual.  
Figure 1-2 Rear Panel  
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1 Introduction  
Model 3300PA  
PowerConnection  
100240 V ac, at 50/60 Hz. The connector  
housingincludesthefuseholderandthe  
powerswitch.  
FuseHolder:Replacingthefuseis  
describedinChapter5,Maintenance.  
I/OPowerSwitch:Turnstheinstrument  
power ON (1) or OFF (0).  
AnalogOutputs  
010 V dcconcentrationoutput.  
010 V dcrangeID(oroptionaloverrange)  
output.  
420 mA dcconcentrationoutput,negative  
ground.  
AlarmConnections Alarm1,Alarm2,andSensorFailureAlarm  
connections.  
SensorConnector  
InternalSamplingSystem,Sensor  
Connector.  
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Percent Oxygen Analyzer  
Operational Theory 2  
Operational Theory  
2.1 Introduction  
Theanalyzeriscomposedoftwosubsystems:  
1. AnalysisUnitwithMicro-FuelCellSensor  
2. ControlUnitwithSignalProcessing,DisplayandControls  
TheAnalysisUnitisdesignedtoacceptthesamplegasanddirectittothe  
sensitivesurfaceoftheMicro-FuelCellsensor.TheMicro-FuelCellisan  
electrochemicalgalvanicdevicethattranslatestheamountofoxygenpresentin  
thesampleintoanelectricalcurrent.  
TheControlUnitprocessesthesensoroutputandtranslatesitintoelectrical  
concentration,range,andalarmoutputs,andapercentoxygenmeterreadout.It  
containsamicrocontrollerthatmanagesallsignalprocessing,input/output,and  
displayfunctionsfortheanalyzer.  
2.2 Micro-Fuel Cell Sensor  
2.2.1 Principles of Operation  
TheoxygensensorusedintheModel3300PAisaMicro-FuelCell  
designedandmanufacturedbyTAI.Itisasealed,disposableelectrochemical  
transducer.  
TheactivecomponentsoftheMicro-FuelCellareacathode,ananode,  
andtheaqueousKOHelectrolyteinwhichtheyareimmersed.Thecellconverts  
theenergyfromachemicalreactionintoanelectricalpotentialthatcanproducea  
currentinanexternalelectricalcircuit.Itsactionissimilartothatofabattery.  
Thereis,however,animportantdifferenceintheoperationofabatteryas  
comparedtotheMicro-FuelCell:Inthebattery,allreactantsarestoredwithin  
thecell,whereasintheMicro-FuelCell,oneofthereactants(oxygen)comes  
fromoutsidethedeviceasaconstituentofthesamplegasbeinganalyzed.The  
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2 Operational Theory  
Model 3300PA  
Micro-FuelCellisthereforeahybridbetweenabatteryandatruefuelcell.(All  
ofthereactantsarestoredexternallyinatruefuelcell.)  
2.2.2 Anatomy of a Micro-Fuel Cell  
TheMicro-FuelCellismadeofextremelyinertplastic(whichcanbe  
placedconfidentlyinpracticallyanyenvironmentorsamplestream).Itiseffec-  
tivelysealed,thoughoneendispermeabletooxygeninthesamplegas.Atthe  
permeableendascreenretainsadiffusionmembranethroughwhichtheoxygen  
passesintothecell.Attheotherendofthecellisaconnector,andatemperature  
compensationnetwork(resistorsandthermistor)onaprintedcircuitboard.  
RefertoFigure2-1, BasicElementsofaMicro-FuelCell, whichillus-  
tratesthefollowinginternaldescription.  
Electrical Connector  
C ircuit Board  
w ith tem perature com pensation network.  
Anode  
C athode  
Teflon M embrane  
Screen  
C lam p  
Figure 2-1. Basic Elements of a Micro-Fuel Cell (not to scale)  
Atthesensingendofthecellisadiffusionmembrane,whosethicknessis  
veryaccuratelycontrolled.Nearthediffusionmembraneliestheoxygensensing  
elementthecathode.  
Theanodestructureislargerthanthecathode.Itismadeofleadandis  
designedtomaximizetheamountofmetalavailableforchemicalreaction.  
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Percent Oxygen Analyzer  
Operational Theory 2  
Thespacebetweentheactiveelementsisfilledbyastructuresaturatedwith  
electrolyte.Cathodeandanodearewetbythiscommonpool.Theyeachhavea  
conductorconnectingthem,throughsomeelectricalcircuitry,tooneofthe  
externalcontactsintheconnectorreceptacle,whichisonthetopofthecell.  
2.2.3 Electrochemical Reactions  
ThesamplegasdiffusesthroughtheTeflonmembrane.Anyoxygeninthe  
samplegasisreducedonthesurfaceofthecathodebythefollowingHALF  
REACTION:  
O2 + 2H2O + 4e4OH–  
(cathode)  
(Fourelectronscombinewithoneoxygenmoleculeinthepresenceof  
waterfromtheelectrolytetoproducefourhydroxylions.)  
Whentheoxygenisreducedatthecathode,leadissimultaneouslyoxidized  
attheanodebythefollowingHALFREACTION:  
2(Pb + 2OH) → 2(Pb+2 + H2O) + 4e–  
(anode)  
(Twoelectronsaretransferredforeachatomofleadthatisoxidized.TWO  
ANODEREACTIONSbalanceonecathodereactiontotransferfourelec-  
trons.)  
Theelectronsreleasedatthesurfaceoftheanodeflowtothecathode  
surfacewhenanexternalelectricalpathisprovided.Thecurrentisproportional  
totheamountofoxygenreachingthecathode.Itismeasuredandusedto  
determinetheoxygenconcentrationinthegasmixture.  
TheoverallreactionforthefuelcellistheSUMofthehalfreactionsabove,  
or:  
2Pb + O2 2PbO  
(Thesereactionswillholdaslongasnogaseouscomponentscapableof  
oxidizingleadarepresentinthesample. Theonlylikelycomponentsarethe  
halogensiodine,bromine,chlorineandfluorine.)  
Theoutputofthefuelcellislimitedby(1)theamountofoxygeninthecell  
atthetimeand(2)theamountofstoredanodematerial.  
Intheabsenceofoxygen,nocurrentisgenerated.  
2.2.4 The Effect of Pressure  
Inordertostatetheamountofoxygenpresentinthesampleasapercent-  
ageofthegasmixture,itisnecessarythatthesamplediffuseintothecellunder  
constantpressure.  
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2 Operational Theory  
Model 3300PA  
Ifthepressurechanges,theratethatoxygenreachesthecathodethrough  
thediffusingmembranewillalsoincrease.Theelectrontransfer,andthereforethe  
externalcurrent,willincrease,eventhoughtheproportionofoxygenhasnot  
changed.  
Fortunately,Dalton'sLawconfirmsthateverygasinamixturecontributes  
thesamepressuretothemixturethatitwouldexertifitwerealoneinthesame  
amountinthatsamevolume.Thismeansthataslongasthetotalpressureofthe  
sampleremainsconstant,themixturecanchange,butthediffusionoftheoxygen  
willbeaffectedonlybytheconcentrationoftheoxygen.  
Forthisreason,thesamplesystemsupplyingsamplegastothecellshould  
bedesignedtokeepthepressureonthediffusionmembraneconstant.  
2.2.5 Calibration Characteristics  
GiventhatthetotalpressureofthesamplegasatthesurfaceoftheMicro-  
FuelCellinputisconstant,aconvenientcharacteristicofthecellisthatthe  
currentproducedinanexternalcircuitofconstantimpedanceisdirectlypropor-  
tionaltotherateatwhichoxygenmoleculesreachthecathode,andthisrateis  
directlyproportionaltotheconcentrationofoxygeninthegaseousmixture.In  
otherwordsithasalinearcharacteristiccurve,asshowninFigure2-2.Measur-  
ingcircuitsdonothavetocompensatefornonlinearities.  
Figure 2-2. Characteristic Input/Output Curve for a Micro-Fuel Cell  
Inaddition,sincethereiszerooutputintheabsenceoxygen,thecharacter-  
isticcurvehasanabsolutezero.Thecellitselfdoesnotneedtobezeroed.  
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Percent Oxygen Analyzer  
Operational Theory 2  
2.3 Electronics  
2.3.1 General  
ThesignalprocessingusesanIntel microcontrollerwithon-boardRAM  
andROMtocontrolallsignalprocessing,input/output,anddisplayfunctionsfor  
theanalyzer.Systempowerissuppliedfromauniversalpowersupplymodule  
designedtobecompatiblewithmostinternationalpowersources.  
ThepowersupplycircuitryisonthePowerSupplyPCB,whichismounted  
vertically,justbehindtherearpaneloftheControlUnit.  
Thesignalprocessingelectronicsincludingthesensoramplifier,  
microcontroller,analogtodigital,anddigitaltoanalogconvertersarelocatedon  
theMainPCB,whichismountedvertically,justbehindthefrontpanelofthe  
ControlUnit.  
2.3.2 Signal Processing  
Figure2-3isablockdiagramofthesignalprocessingelectronicsdescribed  
below.  
Millivolt  
Potput  
TEMPERATU RE  
SENSO R  
AMPLIFIER  
CO MPENSATION  
NETW ORK ON  
SENSO R PCB  
MFC  
E–I CON V  
4–20 mA dc  
A D C  
Microamp  
Output  
Concentration  
0–10 V dc  
RAN GE ID  
I-22 Sensor  
D A C  
MICRO -  
CO NTRO L-  
LER  
KEYBO ARD  
DISPLAY  
RELAYS  
RELAYS  
ALAR MS  
ALAR MS  
Figure 2-3: Block Diagram of the Signal Processing Electronics  
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2 Operational Theory  
Model 3300PA  
Inthepresenceofoxygenthecellgeneratesacurrent.Thiscurrentflows  
throughaninternalthermistorcompensationnetwork.  
Theoutputofthesensorisconvertedtovoltageinthemillivoltrange. This  
outputisfedtoavoltageamplifier. Theinternalthermistornetworkprovides  
temperaturecompensationofthesensoroutput. Theresistanceofthenetwork  
changeswithtemperature,compensatingforthechangesofthemicrofuelcell  
outputtotemperature.  
Theoutputfromthesensoramplifierissenttoananalogtodigitalconverter  
(ADC),andtheresultingdigitalconcentrationsignalissenttothe  
microcontroller.  
Thedigitalconcentrationsignalalongwithinputfromthefrontpanelbuttons  
(KEYBOARD)isprocessedbythemicrocontroller,andappropriateoutput  
signalsaredirectedtothedisplayandalarmrelays. Thesamedigitalinformation  
isalsosenttoa12-bitdigitaltoanalogconverter(DAC)thatproducesthe0-10  
V dcanalogconcentrationsignalandthe0-10V dcanalograngeIDoutput.A  
currenttovoltageconverter(EICONV)producesthe4-20mA dcanalog  
concentrationsignal.  
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Percent Oxygen Analyzer  
Installation 3  
Installation  
Installationoftheanalyzerincludes:  
1. Unpacking the system.  
Overvoltage  
Category II  
2. Mounting the Control Unit to a 19" Rack.  
3. InstallingtheMicro-FuelCell.  
4. Makingtheelectricalconnections.  
5. Making the gas connections.  
6. Testingtheinstallation.  
CAUTIONS:  
Read this chapter in its entirety before installing the units.  
For indoor use only.  
The Sample must be free of entrained solids or water. How-  
ever, a high humidity sample is ideal, since it will prevent  
water loss from the cell electrolyte.  
The Micro-Fuel Cell sensor electrolyte is caustic. Do not  
attempt to open it. Leaking or exhausted cells should be  
disposed of in accordance with local regulations. Refer to the  
Material Safety Data Sheet in the Appendix.  
Any damage or scarring of the delicate permeable membrane  
on the sensing end of the cell will require cell replacement.  
Prevent contact with membrane by any solid object.  
3.1 Unpacking the Analyzer  
As soon as you receive the instrument, carefully unpack and inspect  
Control Unit, and any included accessories for damage. Immediately report  
any damage to the shipping agent. The analyzer is shipped with all the  
materials you need to install and prepare the system for operation.  
CAUTION: Do not disturb the integrity of the cell package until the cell is to  
actually be used. If the cell package is punctured and air is  
permitted to enter, cell-life will be compromised.  
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3 Installation  
Model 3300PA  
3.2 Location and Mounting  
3.2.1 Control Unit Installation  
The 3300PA Control Unit is designed to be rack mounted in a general  
purpose, indoor area, away from moisture and the elements. The unit should  
be installed at viewing level in a sheltered area.  
Refer to the Outline diagram D-69220 for the physical dimensions of  
theanalyzer.  
3.2.2 Installing the Micro-Fuel Cell  
A Micro-Fuel Cell is included as a separate item. It must be installed  
prior to instrument use.  
Also, once it is expended, or if the instrument has been idle for a  
lengthy period, the Micro-Fuel Cell will need to be replaced.  
To install or replace the Micro-Fuel Cell, follow the procedures in  
Chapter 5, Maintenance.  
3.3 Electrical Connections  
Figure 3-1 shows the Model 3300PB rear panel. For detailed pinouts,  
see the wiring/interconnection drawings in the Drawings section at the rear  
of this manual.  
Figure 3-1 Electrical Connectors for AC Control Unit  
3-2  
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Percent Oxygen Analyzer  
Installation 3  
Primary Input Power: The power cord receptacle, fuse block and  
Power switch are located in the same assembly. A 6-foot, standard AC  
power cord is supplied with the Control Unit. Insert the female plug end of  
the power cord into the power cord receptacle.  
The universal power supply allows direct connection to any 100-240  
VAC, 50/60Hz power source. The fuse block, to the right of the power cord  
receptacle, accepts two 3AG, 0.5 A, time-lag (T) fuse. (See Fuse Replace-  
ment in chapter 5, Maintenance.)  
The Power switch is located on the right-hand end of the power source  
inputreceptacleassembly.  
Analog Outputs: There are three DC output signal connectors with  
screw terminals on the panel. There are two wires per output with the polar-  
ity noted. See Figure 3-3. The outputs are:  
010 V % Range:  
Voltage rises with increasing oxygen concentration,  
from 0 V at 0 percent oxygen to 10 V at full scale  
percent oxygen. (Full scale = 100% of programmed  
range.)  
010 V Range ID:  
03.33 V = Low Range, 06.66 V = High Range,  
10 V = Air Cal Range.  
420 mA % Range: Current increases with increasing oxygen concentra-  
tion, from 4 mA at 0 percent oxygen to 20 mA at full  
scale percent oxygen. (Full scale = 100% of pro-  
grammedrange.)  
Alarm Relays: The three alarm-circuit connectors are screw terminals  
for making connections to internal alarm relay contacts. There is one set of  
contacts for each type of alarm. Contacts are Form C, with normally open  
and normally closed contact connections capable of switching up to 0.5  
ampere at 125 VAC into a resistive load (2A for 30 VDC).  
The alarm relay circuits are designed for failsafe operation, meaning the  
relays are energized during normal operation. If power fails the relays de-  
energize(alarmsactivated).  
The contact connections are indicated diagrammatically on the rear  
panel as Normally Closed, Common, and Normally Open. Figure 3-2  
explains how these act in failsafe operation.  
Alarm 1 and Alarm 2 can both be configured as either HI or LO. A HI  
alarm will activate when concentration is above threshold, while a LO alarm  
will activate when concentration is below threshold.  
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3 Installation  
Model 3300PA  
Figure 3-2: Contact ID for FAILSAFE Relay Operation  
The specific descriptions for each type of alarm are as follows:  
Alarm #1  
Programmable as high or low alarm. Can be set any-  
where between 0 and 25 %.  
Alarm #2  
Programmable as high or low alarm. Can be set any-  
where from 0 to 25 %.  
Sensor Fail  
CAUTION:  
Actuates when the output of the Micro-Fuel Cell sensor  
falls below the acceptable level (0.05% O2).  
There could be hazardous voltage at the alarms termi-  
nals, even when power is removed from the instrument.  
Internal Sensor Wiring: The receptacle for the analysis unit cable is  
located in the lower left-hand corner of the rear panel. The 6-pin polarized  
connector is keyed to fit only one way into the receptacle. Do not force it in.  
The other end of the cable have two terminal connectors. This should be  
connected to the header on the top of the sensor.  
3.4 Gas Connections  
The standard Model 3300PA has two inlets and one outlet fixture only.  
Calibration gasses can be connected into the "Span" inlet. The two inlets and  
one outlet are 1/8 inch brass fittings.  
A selector valve is provided to feed the analysis unit with either sample  
or gas.  
A flowmeter and a flow controller valve are part of the system and will  
assist in setting the flow of the gas.  
Sample flow should be adjusted to 2 SCFH. The sample vent connec-  
tion should not restrict the sample flow. The sensor is designed to operate at  
3-4  
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Percent Oxygen Analyzer  
Installation 3  
atmospheric pressure. Restricting the sample vent line will result in pressur-  
izing the sensor and altering the O2 reading.  
The pressure required will depend on the sampling system. When  
venting into a constant pressure, such as the atmosphere, controlling input  
pressure is simple. If you are venting into a system of varying pressure, then  
some form of pressure regulation is required.  
Figure 3-3: Piping Diagram  
(standard piping diagram for positive pressure service)  
3.4.1 Vacuum Service Option  
For vacuum service plumbing reference figure 3-4. The vacuum  
service option is recommended for applications in which the sample source is  
not pressurized. The customer must supply a pump and bypass system to  
complete the sample system. The sample inlet and outlet pressure must be  
maintained at a constant pressure for proper performance. If the sample inlet  
or vent pressure will not be held constant during the process, a pressure  
regulator must be used to regulate the pressure across the cell.  
Adjust the flow rate on a vacuum service system as follows:  
Select Sample with the three-way control valve and open the flow  
control valve on the analyzer to full flow (located on the analyzer flow  
meter). Open the pump bypass valve, and turn on the pump. Readjust the  
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3 Installation  
Model 3300PA  
pump by-pass valve to limit the maximum flow rate to full scale on the  
flowmeter with the flowmeter valve fully open. Adjust the analyzer flow  
control valve (flowmeter valve) to a flow-rate of approximately 2 SCFH).  
Select Span and verify that the span and Sample gas are at different pres-  
sures. The calibration accuracy will be adversely affected if the Span and  
Sample gases are at differing pressures.  
If the span gas is provided from pressurized source, a control valve  
must be added between the analyzer and the span gas source. This valve is  
used to adjust the span flow rate to match the sample flow rate. Do not  
adjust the span flow rate with the flow control valve located on the analyzer  
for units with vacuum service options.  
Custom e r Supplie d Pa rts  
Figure 3-3: Piping Diagram for Vacuum Service Option  
3.5 Installation Checklist  
Before connecting the instrument to the power source and turning it on,  
make sure you have:  
Correctly installed the Sample and Exhaust gas lines  
Opened the isolation valves  
Checked for leaks  
Set the sample pressure to 510 psig, nominal (for non-vacuum  
serviceunits)  
Set the flow  
Once the above checks have been made, you can connect to the power  
source. The instrument is now ready for operation.  
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Percent Oxygen Analyzer  
Operation 4  
Operation  
4.1 Introduction  
Once the analyzer has been mounted, the gas lines connected and the  
electrical connections made, the Analyzer can be configured for your appli-  
cation. This involves setting the system parameters:  
Defining the user selectable analysis ranges.  
Settingalarmsetpoints.  
Calibratingtheinstrument.  
All of these functions are performed via the front panel controls, shown  
in Figure 4-1.  
Analyzing for the percent oxygen level in the gas passing through the  
cell block is the default mode of operation. As long as no front panel buttons  
are being pressed the Analyzer is analyzing.  
Figure 4-1: Front Panel Controls and Indicators  
4-1  
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4 Operation  
Model 3300PA  
4.2 Using the Function and Data Entry  
Buttons  
When no buttons on the Analyzer are being pressed, the instrument is in  
the Analyze mode. It is monitoring the percent of oxygen in the sample gas  
that is flowing through the Remote Probe.  
When one of the Function Buttons is being pressed, the Analyzer is in  
the Setup mode or the Calibration mode.  
The 4 Setup function buttons on the analyzer are:  
SET ALARM 1  
SET ALARM 2  
SET HI RANGE  
SET LO RANGE  
The Calibration mode button is:  
SPAN  
The Data Entry buttons (and ) increment the values displayed on  
the PERCENT OXYGEN meter while one of the Function buttons is being  
held down.  
: Incrementsthedisplayedvalueupwards.  
: Incrementsthedisplayedvaluedownwards.  
Any of the functions can be selected at any time by holding down the  
appropriatebutton.  
Each function will be described in the following sections. Although the  
operator can use any function at any time, the order chosen in this manual is  
appropriate for an initial setup.  
4.3 Setting the Analysis Ranges  
The two user definable analysis ranges are both capable of being  
adjusted for from 0-1% to 0-25% oxygen concentration. Whatever values are  
selected, the analyzer automatically switches from the LO range to the HI  
range when the oxygen concentration reaches 100% of the LO range  
fullscale value, and it switches back to the LO range when the oxygen  
concentration reaches 85% of the LO range fullscale value  
Note: The HI Range setpoint MUST be set at a higher concentration percent-  
age than the LO Range setpoint.  
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Percent Oxygen Analyzer  
Operation 4  
4.3.1 HI Range  
Setting the HI Range fullscale value defines the LEAST sensitive  
analysis range to be used. To set the HI Range:  
1. Press the SET HI RANGE Function button once.  
2. Immediately (within 5 seconds) press either the or button to  
raise or lower the displayed value, as required, until the display  
readsthedesiredfullscalepercentconcentration.  
4.3.2 LO Range  
Setting the LO Range fullscale value defines the MOST sensitive range  
to be used. To set the LO Range:  
1. Press the SET LO RANGE Function button once.  
2. Immediately (within 5 seconds) press either the or button to  
raise or lower the displayed value, as required, until the display  
readsthedesiredfullscalepercentconcentration.  
4.4 Setting the Alarm Setpoints  
The alarm setpoints can be adjusted over the full range of the analyzer  
(0-25% oxygen content). They are set as a percent of oxygen content, so that  
an alarm set to indicate 9.6 on the display will activate at 9.6% O2 on any O2  
range.  
4.4.1 Set Alarm 1  
Alarm 1 can be set either as a high or low alarm. To configure this  
alarm to your preferences:  
1. Press the SET ALARM 1 function button once.  
2. The display will flash either HI or LO depending on what the  
alarm was configured in the last time. If the alarm configuration  
must be changed, use the Up or Down keys to toggle the alarm  
from HI to LO or viceversa (if within 5 seconds no key is  
pressed, the instrument will return to the sample mode and  
displayoxygenconcentration).  
3. To change the setting at which the alarm will be actuated, press  
the SET ALARM 1 function button once more. The alarm  
setpoint will flash on the LED display. Press either the Up or  
Down keys to raise or lower the displayed value, as required,  
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4 Operation  
Model 3300PA  
until the display reads the desired percent concentration. (if  
within 5 seconds no key is pressed, the instrument will return to  
the sample mode and display oxygen concentration).  
After setting the value wait for the unit to time out of this mode (ap-  
proximately 5 seconds) and return to displaying oxygen concentration.  
4.4.2 Set Alarm 2  
Alarm 2 can be set either as a high or low alarm. To configure this  
alarm to your preferences:  
1. Press the SET ALARM 2 function button once.  
2. The display will flash either HI or LO depending on what the  
alarm was configured in the last time. If the alarm configuration  
must be changed, use the Up or Down keys to toggle the alarm  
from HI to LO or viceversa (if within 5 seconds no key is  
pressed, the instrument will return to the sample mode and  
displayoxygenconcentration).  
3. To change the setting at which the alarm will be actuated, press  
the SET ALARM 2 function button once more. The alarm  
setpoint will flash on the LED display. Press either the Up or  
Down keys to raise or lower the displayed value, as required,  
until the display reads the desired percent concentration. (if  
within 5 seconds no key is pressed, the instrument will return to  
the sample mode and display oxygen concentration)  
After setting the value wait for the unit to time out of this mode (ap-  
proximately 5 seconds) and return to displaying oxygen concentration.  
4.4.3 Sensor Fail Alarm  
The SENSOR FAIL alarm is factory set to a reading less than 0.05%  
O2. Should this alarm trigger the ALARM Indicator below the SET Func-  
tion buttons will blink, and the alarm relay contact dedicated to this function  
will change state.  
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Percent Oxygen Analyzer  
Operation 4  
4.5 Selecting a Fixed Range or Autoranging  
The Model 3300PA can operate in fixed high, fixed low, or  
autoranging mode. To change modes:  
1. Press and then release the SET HI RANGE and the SET LO  
RANGE buttons simultaneously.  
2. Immediately (within 5 seconds) press either the or button  
until Auto, Lo, or Hi displays on the LCD, as desired.  
After about three seconds, the analyzer resumes monitoring in the  
selected range mode.  
4.6 Calibration  
PreliminaryIf not already done: Power up the Analyzer and  
allow the LED reading to stabilize. Set the Alarm setpoints and  
the fullscale ranges to the desired values.  
3300PA SpanProcedure:  
1. Press the SPAN button once.  
Note: The numeric LED starts flashing and will continue to flash for five  
minutes before timing-out. During this five minutes interval, the LED  
will continue to track gas through the analyzer.  
2. Flow span gas of a known oxygen concentration into the  
analyzer. The analyzer will begin to track the span gas.  
Note: The alarms will not change state during span calibration.  
3. When the meter stabilizes, use the UP/DOWN arrows to adjust  
the analyzer span value to the exact percent O2 concentration in  
the span gas.  
Note: When an arrow button is first pressed, the LED begins flashing  
slightly more rapidly and no longer tracks the span gas. Instead, it  
respondstotheUP/DOWNkeystrokes.  
Note: While the LED is flashing slightly more rapidly, the SPAN routine will  
time-out in five seconds (instead of five minutes), if no further key-  
strokesareentered.  
4. When the span value is set to the known concentration of O2 in  
the span gas, stop pressing the keys and wait for five seconds.  
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4 Operation  
Model 3300PA  
Note: When you stop pressing the UP/DOWN keys, the rapid flashing will  
cease and the new span value will be acquired by the analyzer after  
fiveseconds.  
The alarms will only be nonresponsive for 60 seconds. This time-  
frame allows you to reintroduce sample gas into the analyzer.  
5. Immediately flow sample into the analyzer.  
Supplementary Information  
If, during the Span Procedure, you pressed the SPAN button by mis-  
take, you must wait five minutes for the analyzer to resume analisis or you  
can press the UP button and then the DOWN button. (Pressing the UP and  
DOWN buttons causes the analyzer to time-out in five seconds instead of  
fiveminutes).  
If during the span procedure, you press the RANGE or ALARM  
buttons:  
- either the range or alarm routine will be activated.  
- any changes to span will be rejected.  
- the 60 second alarm delay will not occur, i.e., the alarms will be  
responsive immediately.  
CAUTION: TET/AI considers the action of pressing the ALARM or  
RANGE buttons to be at your (the users) discretion and  
NOT under guarantee of alarm protection.  
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Percent Oxygen Analyzer  
Maintenance 5  
Maintenance  
Asidefromnormalcleaningandcheckingforleaksatthegasconnections,  
theModel3300PAshouldnotrequireanymaintenancebeyondreplacementof  
expendedMicro-FuelCells,andperhapsablownfuse.Routinemaintenance  
includesoccasionalrecalibration,asdescribedinchapter4,Operation.  
Overvoltage  
Category II  
5.1 Replacing the Fuse  
Remove Power to Unit before replacing the fuse.  
Whenafuseblows,checkfirsttodeterminethecause,thenreplacethe  
fuseusingthefollowingprocedure:  
1. DisconnecttheACpowerandplacethepowerswitchlocatedon  
therearpanelintheOposition.Removethepowercordfromthe  
receptacle.  
2. Thefusereceptacleislocatedinthepowercordreceptacle  
assemblyintheupperleft-handcorneroftherearpanel.SeeFigure  
5-1.  
Fuse  
Figure 5-1: AC Fuse Replacement  
3. Insertasmallflat-bladescrewdriverintotheslotinthereceptacle  
wallnearestthefuseandgentlypryopenthefusereceptacle.The  
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5 Maintenance  
Model 3300PA  
fuseholderwillslideout.Therearetwofusesinuseandarevisiblein  
theclip.  
4. Removethebadfuseandreplaceitwitha5x20mm0.5 A,  
250 VAC, IEC time lag (T) fuse (P /N F1128).  
5. Replacethefuseholderintoitsreceptacle,pushinginfirmlyuntilit  
clicks.  
5.2 Sensor Installation or Replacement  
5.2.1 When to Replace a Sensor  
TheMicro-FuelCelltypicallyprovidealmostconstantoutputthroughtheir  
usefullife,andthenfalloffsharplytowardszeroattheend.Youwillfindthat  
verylittleadjustmentwillberequiredtokeeptheanalyzercalibratedproperly  
duringthedurationofagivencellsusefullife.  
Ifthesamplebeinganalyzedhasalowoxygenconcentration,cellfailure  
willprobablybeindicatedbytheinabilitytoproperlycalibratetheanalyzer.If  
largeadjustmentsarerequiredtocalibratetheinstrument,orcalibrationcannot  
beachievedwithintherangeofthebuttons,thecellmayneedreplacing.  
ReadthesectionCellWarrantyConditions,below,beforereplacingthecell.  
Inaddition,ifthefrontpanelPercentOxygenMeterdisplays00.0when  
theunitispluggedin,andthepowerswitchisintheONposition,thesensor  
needs to be replaced.  
IMPORTANT: After replacing the Micro-Fuel Cell, the analyzer must be  
recalibrated. See Calibration in chapter 4.  
5.2.2 Ordering and Handling of Spare Sensors  
Tohaveareplacementcellavailablewhenitisneeded,TBE/AIrecom-  
mendsthatonesparecellbepurchasedshortlyaftertheinstrumentisplacedin  
service,andeachtimethecellisreplaced.  
CAUTION: Do not stockpile cells. The warranty period starts on the day of  
shipment. For best results, order a new spare cell when the  
current spare is installed.  
Thesparecellshouldbecarefullystoredinanareathatisnotsubjectto  
largevariationsinambienttemperature(75° Fnominal),andinsuchawayasto  
eliminatethepossibilityofincurringdamage.  
CAUTION: Do not disturb the integrity of the cell package until the cell is to  
actually be used. If the cell package is punctured and air is permit-  
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Percent Oxygen Analyzer  
Maintenance 5  
ted to enter, cell-life will be compromised.  
WARNING: The sensor used in the Model 3300PA uses electrolytes  
which contain substances that are extremely harmful if  
touched, swallowed, or inhaled. Avoid contact with ANY  
fluid or powder in or around the unit. What may appear to be  
plain water could contain one of these toxic substances. In  
case of eye contact, immediately flush eyes with water for  
at least 15 minutes. Call physician. (See Appendix, Material  
Safety Data SheetMSDS).  
5.2.3 Removing the Micro-Fuel Cell  
ToremoveaspentordamagedMicro-FuelCell:  
1. DisconnectthePowerSourcefromtheUnit.  
2. OpenSensorHousingdooronthefrontpanel.  
3. Unplugtheconnectorfromthespentcell.  
4. Removethespentcellbyunscrewingit,counterclockwise,fromthe  
cellblock.  
5. Disposeofthecellinasafemanner,andinaccordancewithlocal  
laws.  
5.2.4 Installing a Micro-Fuel Cell  
ToinstallanewMicro-FuelCell:  
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5 Maintenance  
Model 3300PA  
CAUTION: Do not scratch, puncture, or damage the sensing membrane of the  
Micro-Fuel Cell sensor. Damage to the membrane will require  
replacementofthesensor.  
1. DisconnectthePowerSourcefromtheUnit.  
2. RemovethenewMicro-FuelCellfromitsprotectivebag,being  
carefulnottolosetheO-ringatthebaseofthethreadedportionof  
thecell.  
3. OpenSensorHousingdooronthefrontpanel.  
4. Replacethecellonthecellholderbyscrewingitclockwiseintothe  
cellblockuntilitisheldfirmlyinthesocket.  
5. Insertthecellblockelectricalconnectorplugintothesocketinthe  
sensor.  
5.2.5 Cell Warranty Conditions  
TheClassI-22 Micro-FuelcellisusedintheModel3300PA.Thiscellis  
alonglifecellandiswarrantedfor2years(underspecifiedoperatingcondi-  
tionsseeAppendix)fromthedateofshipment.NoteanyAddendaattachedto  
thefrontofthismanualforspecialinformationapplyingtoyourinstrument.  
Withregardtosparecells,warrantyperiodbeginsonthedateofshipment.  
Thecustomershouldstockonlyonesparecellperinstrumentatatime.Donot  
attempttostockpilesparecells.  
Ifacellwasworkingsatisfactorily,butceasestofunctionbeforethe  
warrantyperiodexpires,thecustomerwillreceivecredittowardthepurchaseof  
anewcell.  
Ifyouhaveawarrantyclaim,youmustreturnthecellinquestiontothe  
factoryforevaluation.Ifitisdeterminedthatfailureisduetofaultyworkmanship  
ormaterial,thecellwillbereplacedatnocosttothecustomer.  
NOTE: Evidence of damage due to tampering or mishandling will render the  
cell warranty null and void.  
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Percent Oxygen Analyzer  
Appendix  
Appendix  
A.1 Specifications  
Ranges:  
0-3 %and0-10 %oxygen(Standard  
Ranges),and0-25 %(nominal)Calibration  
Range.Userselectable%Rangescanbeset  
between1%and25 %oxygen(optional  
100%range).  
SignalOutput:  
Voltage: 010 V dc,negativeground  
Current: 4-20mA,negativeground  
Range ID: 0-10 V dc.  
Display:  
Lightemittingdiodedisplay.  
Alarms:  
Twocustomerselectablehighorlowfully  
adjustablealarms. Onecellfailurealarm.  
Alarmrelaysform"C"contacts,drycontacts  
rated at 2A for 30VDC, 0.5A for 115VAC.  
SystemOperatingTemp:  
0-50 °C  
Accuracy:  
±2%offullscaleatconstanttemperature  
±5%offullscalethroughoperatingtemp.  
rangeoncetemp.equilibriumisreached.(At  
3 %andhigheruserdefinedranges.)  
Response Time:  
90% in less than 8 seconds at 25 °C.  
SystemPowerRequirements: AC (100-240 VAC, 50/60Hz), 10W.  
SystemEnclosure:  
Rackmountwithhandles. Dimensions  
(Approx.) 19 W x 5 H x 5 D.  
SensorType:  
MicroFuelCellClassI-22.  
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Appendix  
Model 3300PA  
A.2 Spare Parts List  
QTY. P/N  
DESCRIPTION  
1
1
1
1
2
1
C-65220E  
PC Board, Main  
PC Board, Main for 0-100% range.  
PC Board, Power Supply, AC Version  
Micro-FuelCell, I-22  
Fuse (AC), ½A, 250 VAC, IEC Type T  
Flowmeter 0.3-3.0 SCFH  
C-65220F  
C-64586C  
C-44611-I-22  
F-1128  
F-274  
IMPORTANT: Orders for replacement parts should include the part number  
and the model and serial number of the system for which the  
partsareintended.  
Send orders to:  
TELEDYNE ELECTRONIC TECHNOLOGIES  
Analytical Instruments  
16830 Chestnut Street  
City of Industry, CA 91749-1580  
Telephone: (626) 934-1500  
TWX: (910) 584-1887 TDYANYL COID  
Fax: (626) 961-2538  
or your local representative.  
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Percent Oxygen Analyzer  
Appendix  
A.3 Reference Drawing  
D-69127 FinalAssembly(andinterconnectiondiagram)  
D-69220 OutlineDiagram  
A.4 Miscellaneous  
The symbol: ~ is used on the rear panel of the model 3300PA to signify  
voltsalternatingcurrent(V ac).  
NOTE: The MSDS on this material is available upon request  
through the Teledyne Environmental, Health and  
Safety Coordinator. Contact at (626) 934-1592  
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Appendix  
Model 3300PA  
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