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3-9

Alarm Oxygen Monitor

Installation  3

Teledyne Analytical Instruments

ment when calibrated using the monitored atmosphere
or a span gas of unknown composition, will be meaning-
less.

Preliminary—If not already done:

 Power up the Analyzer and

allow the LED reading to stabilize.

Procedure:

1. Expose the sensor to ambient air or instrument grade air (20.9%

oxygen). Allow time for the analyzer to achieve equilibrium.

2. Press the SPAN button once.

3. Immediately (within 5 seconds) press either the 

Δ

 or 

∇

 button

until the display is stable and reads 20.9%.

The unit is now calibrated.  (also see section 4 operation)

Note:

The alarms will be disabled for about 25 seconds after the SPAN
button is released. Disabling the alarms allows air to be cleared from
the sensor without tripping any alarm set below span (20.9%).

Figure 3-6  Front Panel Membrane (Control Unit)

3.7 Operation

Once the instrument has been installed, calibrated, and the power turned

on, it will continuously monitor the oxygen level within the environment it is
placed.  The oxygen level is displayed on the digital meter. The response
time of the instrument will depend on the actual Micro-Fuel Cell (MFC)
installed.  With the class B-3 MFC installed, the response time is less than 15
seconds at 25°C.  The table below indicates the response time for some
MFCs typically used in the Model 3350.

Содержание 3350

Страница 1: ...RESENT IN THIS MONITORINGSYSTEM PERSONALPROTECTIVEEQUIPMENTMAYBEREQUIREDWHENSERVICINGTHISSYSTEM HAZARDOUS VOLTAGES EXIST ON CERTAIN COMPONENTS INTERNALLY WHICH MAY PERSISTFORATIMEEVENAFTERTHEPOWERISTURNEDOFFANDDISCONNECTED ONLYAUTHORIZEDPERSONNELSHOULDCONDUCTMAINTENANCEAND ORSERVICING BEFORECONDUCTINGANYMAINTENANCEORSERVICINGCONSULTWITHAUTHORIZED SUPERVISOR MANAGER DANGER ...

Страница 2: ...y parts in so far as such alterations do not adversely affect our warranty ImportantNotice This instrument provides measurement readings to its user and serves as a tool by which valuable data can be gathered The information provided by the instrument may assist the user in eliminating potential hazards caused by his process however it is essential that all personnel involved in the use of the ins...

Страница 3: ...ltage Directive LVD The following International Symbols are used throughout the Instruc tion Manual for your visual and immediate warnings and when you have to attend CAUTION while operating the instrument CAUTION The operator needs to refer to the manual for further information Failure to do so may compromise the safe operation of the equipment GROUND Protective Earth CAUTION Risk of Electric Sho...

Страница 4: ...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 2 4 Alarms 2 6 Installation 3 1 Unpacking the Analyzer 3 1 3 2 Installation 3 2 3 3 Installing the Micro Fuel Cell 3 2 3 4 Electrical Connections 3 2 3 5 Power and Signal Connections 3 3 3 5 1 AC and Battery Backed Standby Power 3 3 3 5 2 Battery Backed Standby Power 3 4 3 5 2 1 Connecting the R...

Страница 5: ... 1 5 1 1 Standard AC Version 5 1 5 1 2 AC with Battery Backup Version 5 2 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 4 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...

Страница 6: ...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 an...

Страница 7: ...femode Theinstrumentisdesignedasasafetymonitor However itistheresponsi bilityoftheusertoestablishwhetherornotthetotalsystemorinstrument environment alarmcomponentsandanyotherrelevantdeviceswillactually assuresafetyinhis herparticularcircumstances 1 2 Main Features of the Analyzer Accuratereadingsofoxygencontentatthestandard0 25 range Consultfactoryforotherranges Large bright lightemittingdiodemete...

Страница 8: ...forrangeidentification 0 10 VDC OptionalRS232 Compactandrugged wallmountedNEMA 4ratedenclosure CEApproval 1 3 Front Panel Description Allcontrolsanddisplaysexceptthepowerswitchareaccessiblefromthe frontpanel SeeFigure1 1 Thefrontpanelhasthreepushbuttonmembrane switches adigitalmeter andanalarmindicatorLEDforoperatingthemonitor ThesefeaturesaredescribedbrieflyhereandingreaterdetailinChapter4 Operat...

Страница 9: ...inanylighting environment Ithasthreefunctions MeterReadout Asthemeterreadout itdisplaystheoxygen concentrationcurrentlybeingmeasured MeasurementParametersReadout Itdisplaysthespan calibrationpointwhenitisbeingcheckedorchanged AlarmCondition Itdisplaysintermittently CAUt andthegas readingswhenaCAUTIONAlarmhasbeeninitiatedand dAng forDANGERAlarm 1 4 Rear Panel Description Therearpanelcontainstheelec...

Страница 10: ...byuniversal100 240VAC FuseHolder Replacingthefusesis describedinChapter5 Maintenance I OPowerSwitch Turnstheinstrument power ON 1 or OFF 0 AnalogOutputs 0 10 VDCconcentrationoutput 0 10 VDCrangeID oroptional overrange output 4 20 mA DCconcentrationoutput negativeground DigitalOutput RS232 optional AudibleAlarm Outputforstandardinternalorcustomer suppliedexternalaudiblealarm 12VDC 5mA AlarmConnecti...

Страница 11: ...tricalconcentration range andalarmoutputs andapercent oxygenmeterreadout Itcontainsamicrocontrollerthatmanagesallsignal processing input output anddisplayfunctionsfortheanalyzer 2 2 Micro Fuel Cell Sensor 2 2 1 Principles of Operation TheoxygensensorusedintheModel3350isaMicro fuelCelldesigned andmanufacturedbyTAI Itisasealed disposableelectrochemicaltransducer TheactivecomponentsoftheMicro FuelCel...

Страница 12: ...lus tratesthefollowinginternaldescription Figure 2 1 Basic Elements of a Micro Fuel Cell not to scale Atthesensingendofthecellisadiffusionmembrane whosethicknessis veryaccuratelycontrolled Nearthediffusionmembraneliestheoxygensensing element thecathode Theanodestructureislargerthanthecathode Itismadeofleadandis designedtomaximizetheamountofmetalavailableforchemicalreaction Thespacebetweentheactive...

Страница 13: ...cathode Itismeasuredandusedto determinetheoxygenconcentrationinthegasmixture TheoverallreactionforthefuelcellistheSUMofthehalfreactionsabove or 2Pb O2 2PbO Thesereactionswillholdaslongasnogaseouscomponentscapableof oxidizingleadarepresentinthesample Theonlylikelycomponentsarethe halogens iodine bromine chlorineandfluorine Theoutputofthefuelcellislimitedby 1 theamountofoxygeninthecell atthetimeand ...

Страница 14: ...ssureofthesamplegasatthesurfaceoftheMicro FuelCellinputisconstant aconvenientcharacteristicofthecellisthatthe currentproducedinanexternalcircuitofconstantimpedanceisdirectlypropor tionaltotherateatwhichoxygenmoleculesreachthecathode andthisrateis directlyproportionaltotheconcentrationofoxygeninthegaseousmixture In otherwordsithasalinearcharacteristiccurve asshowninFigure2 2 Measur ingcircuitsdonot...

Страница 15: ...indtherearpaneloftheControlUnit Thesignalprocessingelectronicsincludingthesensoramplifier microcontroller analogtodigital anddigitaltoanalogconvertersarelocatedon theMainPCB whichismountedvertically justbehindthefrontpanelofthe ControlUnit 2 3 2 Signal Processing Figure2 3isablockdiagramofthesignalprocessingelectronicsdescribed below Figure 2 3 Block Diagram of the Signal Processing Electronics AL...

Страница 16: ...othedisplayandalarmrelays Thesamedigitalinformation isalsosenttoa12 bitdigitaltoanalogconverter DAC thatproducesthe0 10 V dcanalogconcentrationsignalandthe0 10V dcanalograngeIDoutput A voltagetocurrentconverter E ICONV producesthe4 20mA dcanalog concentrationsignal 2 4 Alarms Whenthealarmsetpointsareproperlyadjusted theyprovideanopera tionalbandthatcoversallacceptableoxygenconcentrations Iftheoxyg...

Страница 17: ... 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...

Страница 18: ...t Turn the instrument off and disconnect the AC power To install the cell in the probe assembly 1 Remove the probe from its holder on the outside of the instrument case and remove the cell from its sealed shipping package 2 Unscrew the cap from the top of the probe assembly 3 Remove the shorting clip from the cell 4 Place the cell in the probe with the terminal end facing down toward the probe con...

Страница 19: ...AC and Battery Backed Standby Power This 3350 is designed to operate from 100 240VAC 50 60 Hz power Connect the included power cord to the AC power as shown in Fig 3 3 for standard AC unit and Fig 3 4 for battery backed standby power 3 5 1 Primary Input Power AC version The power cord receptacle fuse block and Power switch are on the Control Unit A 6 foot standard AC power cord is supplied with th...

Страница 20: ... Control Unit power source input receptacle assembly 3 5 2 Battery Backed Standby Power An optional Battery Backed Standby Power Configuration is offered on the Model 3350 for potential power failure or brown out conditions Power outages will not interfere with a properly working Model 3350 oxygen alarm if it is installed and used correctly The standby power source uses a rechargeable lead acid ba...

Страница 21: ...ry is well charged and in good condition Under actual conditions however these factors will always tend to evolve toward the worst case if left unattended Therefore the user must always ensure that battery condition charge and other related factors are monitored with sufficient frequency to prevent problems Most importantly DO NOT DEPEND UPON THE LONGEVITY OF BATTERY BACKUP but correct problems as...

Страница 22: ...t 0 percent oxygen to 20 mA at full scale percent oxygen Full scale 25 O2 AudibleAlarm Factory installed to internal buzzer may be used for customer interconnection to 12V a Buzzer 12 15VDC 4 3mA Max The RS232 terminals must not be connected to any AC line source or any source of hazardous voltage 3 5 4 RS 232 Port Optional The digital signal output is a standard RS 232 serial communications port ...

Страница 23: ...ernal alarm relay contacts There is one set of contacts for each of 3 different types of alarm Alarm 1 CAUTION Alarm 2 DAN GER and Cell Fail Contacts are Form C with normally open and nor mally closed contact connections capable of switching up to 3 ampere at 130 VAC into a resistive load 3A for 30 VDC maximum The alarm relay circuits are designed for failsafe operation meaning the relays are ener...

Страница 24: ...first time the Oxygen Monitor must be calibrated If this instrument is to be used as a safety monitor routine calibration should be carried out on a weekly basis If it is not feasible to use ordinary air as the calibration gas then clean compressed instrument air can be used It will probably be necessary to seal the sensor in the piped in calibration gas to isolate it from the surrounding atmosphe...

Страница 25: ...ted also see section 4 operation Note The alarms will be disabled for about 25 seconds after the SPAN button is released Disabling the alarms allows air to be cleared from the sensor without tripping any alarm set below span 20 9 Figure 3 6 Front Panel Membrane Control Unit 3 7 Operation Once the instrument has been installed calibrated and the power turned on it will continuously monitor the oxyg...

Страница 26: ... receive credit on a prorated basis toward the purchase of a new cell NOTE Evidence of mishandling will render the cell warranty null and void 3 9 Safety Checklist The following checklist is offered only as a guide to assist the user in verifying a number of important factors it is by no means a complete list of safety related items The procedures and precautions relating to the use of the instrum...

Страница 27: ...isavailablefortheSeries3350 Oxygen Analyzerforthose applicationsthatrequirepiped ingases The adapterconsistsofasealedchamberwheretheinstrument sprobeis inserted withtworadially orientedhoseconnectorstowhichsupplyand ventlinesforthecalibrationgasareconnected RefertoFig3 7 The designprovidesgasflowoverthesensingsurfaceofthecellwithout contaminationbysurroundingmonitoredatmosphere NOTE If the sensor ...

Страница 28: ...3 Installation Model 3350 3 12 TeledyneAnalyticalInstruments Left intentially blank ...

Страница 29: ...n one of the Function Buttons is being pressed the Analyzer is in the Setup mode or the Calibration mode The Calibration mode button is SPAN The Data Entry buttons Δ and increment the values displayed on the PERCENT OXYGEN meter while one of the Function buttons is being held down Δ Incrementsthedisplayedvalueupwards Incrementsthedisplayedvaluedownwards The Span function can be selected at any tim...

Страница 30: ...he 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 4 3 Calibration Prior to operating this instrument for the first time the Oxygen Monitor must be calibrated If this instrument is to be used as a safety monitor routine ca...

Страница 31: ...ARM Indicator stops blinking 2 Press the SPAN button once 3 Immediately within 5 seconds press either the Δ or button until the display is stable and reads 20 9 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...

Страница 32: ...4 Operation Model 3350 4 4 TeledyneAnalyticalInstruments ...

Страница 33: ...on andACwithBatteryBackupVersion Bothconfigurationshavereplaceable fuses Whenafuseblows checkfirsttodeterminethecause thenreplacethe fuse s usingthefollowingprocedures dependingonwhichversionisused 5 1 1 Standard AC Version Whenafuseblows checkfirsttodeterminethecause thenreplacethe fuseusingthefollowingprocedure 1 DisconnecttheACpowerandplacethepowerswitchlocatedon therearpanelofthecontrolunitint...

Страница 34: ...holdercap pushin androtate1 4turn Thecapwillpopoutafewmillimeters Pullout thefuseholdercapandfuse asshowninfigure5 2 Figure 5 2 DC Battery Backup Fuse Replacement 3 Replacefusebyreversingprocessinstep1 byremovingthebad fuseandreplaceitwitha5x20mm0 25A 250VAC Type T fuse P N F1128 and 0 50A 250VAC P N F1358 5 2 Sensor Installation or Replacement 5 2 1 When to Replace a Sensor TheMicro FuelCelltypic...

Страница 35: ...toredinanareathatisnotsubjectto 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 ted to enter cell life will be compromised WARNING The sensor used in the Model 3350 uses electrolytes which contai...

Страница 36: ...ellandiswarrantedfor12Months underspecifiedoperatingcondi tions seeAppendix fromthedateofshipment NoteanyAddendaattachedto thefrontofthismanualforspecialinformationapplyingtoyourinstrument Withregardtosparecells 12monthshelflifewarrantyperiodbeginson thedateofshipment Thecustomershouldstockonlyonesparecellperinstru mentatatime Donotattempttostockpilesparecells Ifacellwasworkingsatisfactorily butce...

Страница 37: ...f full scale Sensor Type B 3 Display Light emitting diode display LED Battery Life 48hours non alarmcondition non failsafe 17hours non alarmconditions failsafe Power Requirements AC 100 to 240VAC 50 60 Hz 0 3A MAX Battery Backup version charges and maintains a 12 VDC lead acid battery SignalOutput Voltage 0 10 VDC Negative Ground 10mA MAX Current 4 20 mA Negative Ground 15V MAX open circuit 10VDC ...

Страница 38: ...ry Backup Version QTY P N DESCRIPTION 1 C 70724 Battery Charger BD 1 C 70740B PC Board Power Supply DC Version 5 F 1128 Fuse 1 4 A IEC Type T 250VAC 1 F1358 Fuse 1 2 A IECType T 250VAC 5x20mm 1 B 500 Battery 12VDC 7Ah IMPORTANT Orders for replacement parts should include the part number and the model and serial number of the system for which the parts are intended Send orders to TELEDYNE INSTRUMEN...

Страница 39: ...OutlineDiagram D 70680 InterconnectionDiagram A 4 Miscellaneous The symbol is used on the rear of the control panel of the model 3350 to signify volts alternating current 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 ...

Страница 40: ...A 4 Appendix Model 3350 Teledyne Analytical Instruments ...

Страница 41: ...H 14 N A Solubility in Water Completely soluble Insoluble Percent Volatiles by Volume None N A Appearance and Odor Colorless odorless solution Grey metal odorless Section I Product Identification Product Name Micro FuelCells Mini Micro FuelCells allclasses Super Cells all classes except T 5F Electrochemical Oxygen Sensors all classes Manufacturer TeledyneElectronicTechnologies AnalyticalInstrument...

Страница 42: ...OH Effects of overexposure Ingestion The electrolyte could be harmful or fatal if swallowed Oral LD50 RAT 3650 mg kg Eye The electrolyte is corrosive eye contact could result in permanent loss of vision Dermal The electrolyte is corrosive skin contact could result in a chemical burn Inhalation Liquid inhalation is unlikely Signs symptoms of exposure Contact with skin or eyes will cause a burning s...

Страница 43: ...put on gloves and eye protection before remov ing the cell Disposal Should be in accordance with all applicable state local and federal regulations NOTE The above information is derived from the MSDS provided by the manufacturer The information is believed to be correct but does not purport to be all inclusive and shall be used only as a guide Teledyne Analytical Instruments shall not be held liab...

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