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Teledyne 212R Скачать руководство пользователя страница 4

Teledyne Analytical Instruments

4

Thermal Conductivity Analyzer Model 212R

4.3 Standardization ............................................................ 16

5

Periodic Maintenance

5.1 Heater Fan ................................................................... 17

6

Troubleshooting

6.1 Preliminary ................................................................... 17

6.1.1

Electrical Checks ........................................... 17

6.1.2

Sampling System Checks .............................. 18

6.1.3

Summary of Preliminary Checks .................... 18

6.2 Loss of Zero Control..................................................... 18

6.2.1

Dynamic Balance Procedure ......................... 19

6.3 Correct Operation ......................................................... 20
6.4 Incorrect Operation....................................................... 21

6.4.1

Analyzer Leak Check ..................................... 21

6.4.2

Temperature Control Check ........................... 22

7

Calibration Data

7.1 Ranges ........................................................................ 24
7.2 Output Signal ............................................................... 25
7.3 Span Setting ................................................................ 25
7.4 Recommended Accessory Gases ................................ 25

7.4.1

Reference Gas ............................................... 25

7.4.2

Zero Gas ........................................................ 25

7.4.3

Span Gas ....................................................... 26

Appendix

A

Recommended 2-Year Spare Parts List ....................... 26

A

Drawing List ................................................................. 27

A Specifications...................................................................... 28

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Содержание 212R

Страница 1: ...ISMONITORINGSYSTEM PERSONALPROTECTIVEEQUIPMENTMAYBEREQUIREDWHENSERVICINGTHISSYSTEM HAZARDOUSVOLTAGESEXISTONCERTAINCOMPONENTSINTERNALLYWHICHMAYPERSISTFORA TIMEEVENAFTERTHEPOWERISTURNEDOFFANDDISCONNECTED ONLY AUTHORIZED PERSONNEL SHOULD CONDUCT MAINTENANCE AND OR SERVICING BEFORE CONDUCTINGANYMAINTENANCEORSERVICINGCONSULTWITHAUTHORIZEDSUPERVISOR MANAGER DANGER P NM73212 11 29 07 ECO 07 0182 ...

Страница 2: ...rts 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 instrum...

Страница 3: ...l Output 8 2 2 3 Regulating Transformer 8 2 2 4 Completion Inspection 9 2 3 Gas Requirements Connections 9 2 3 1 Reference Gas 10 2 3 2 Zero Gas 10 2 3 3 Span Gas 10 2 3 4 Installation of Cylinder Supplies 11 2 3 5 Sample Pressure 11 2 3 6 Interconnecting Lines 11 2 3 7 Vent Lines 12 3 Startup 3 1 Preliminary 12 3 2 Reference Gas Flow 13 3 3 Zero Gas Flow 13 3 4 Warmup 13 3 5 Zero Standardization ...

Страница 4: ...reliminary Checks 18 6 2 Loss of Zero Control 18 6 2 1 Dynamic Balance Procedure 19 6 3 Correct Operation 20 6 4 Incorrect Operation 21 6 4 1 Analyzer Leak Check 21 6 4 2 Temperature Control Check 22 7 Calibration Data 7 1 Ranges 24 7 2 Output Signal 25 7 3 Span Setting 25 7 4 Recommended Accessory Gases 25 7 4 1 Reference Gas 25 7 4 2 Zero Gas 25 7 4 3 Span Gas 26 Appendix A Recommended 2 Year Sp...

Страница 5: ...formed by the center tapped secondary winding of a trans former With reference and zero standardization gas flowing the bridge circuit is balanced at one end of the measurement range A span standardization gas containing a known concentration of the component of interest is then introduced into the sample path and the resulting error signal generated by the now unbalanced bridge circuit is calibra...

Страница 6: ...ation ConsiderationofUsingthe212RtoMeasureH2 ormeasureothercompounds in H2 H2 in the gas state can be assume of one tow states para H2 or ortho H2 EachhasitsownThermalConductivityValue Thesedifferbyabout10 fromoneanother Sothismustbetakenintoconsiderationwhenattemptingtousethe212RonH2 streams WewouldrecommendoneconsultWikipedia comorothersourcestolearn moreaboutthesetwostatesofH2andhowthethermalco...

Страница 7: ...possible subjecttotheafore mentionedconditions tothesamplepoint Outlinediagramsofbothunitswillbefoundinthedrawingsection After thecutouthasbeenmadeintheequipmentpanel TAIrecommendsthatthe analyzerbeusedasatemplatetolayoutthefourmountingholes Suchaproce durewillcompensateforsheetmetaltoleranceerrors 2 2 Electrical Requirements and Connections Provisionshavebeenmadetoaccommodatethethreeexternalcircu...

Страница 8: ...anual andconnectthepowerandgroundwiringasshown Besuretopolarizethe powerserviceconnectionsasindicated Whenconnectingthewires donot leaveanexcessiveamountofslackwithintheanalyzer Twovacuumtubesare locatedjustbelowthewiringareaandthewiringshouldbeinstalledtobewell clearofthem 2 2 2 Signal Output Connectatwoconductorshieldedcablebetweentheanalyzerandrecord ingequipment Besuretoobservetheproperpolarit...

Страница 9: ...nged sothattheycanbemanipulatedwithoutdisturbingthedelicatetemperature equilibriumoftheinstrumentinterior 2 3 Gas Requirements and Connections Beforeattemptinginstallationofthesampleandsupportinggaslinesand accessoriesgivecarefulconsiderationtothefollowingimportantinstallation notes Note 1 Itisabsolutelynecessarythatallconnectionsandcomponents inthegascontrolsystemaheadofthemeasuringcellbeleak fre...

Страница 10: ...emainunchangedwheninuse NOTE When it becomes necessary to replace the reference gas the analyzer will have to be recalibrated 2 3 2 Zero Gas A supply of gas composed of the background gas of the analysis and the lowest attainable concentration of impurity will be required to standard ize one end of the ranges of interest The composition of the zero gas must be known to the same exactitude expected...

Страница 11: ...mustbepurgedbyalterativelypressuringthefirststage withthesecond stageoff thenbleedingoutthefirststagebyopeningthesecondstage backand forth severaltimes Note Make sure to close the cylinder prior to bleeding the first stage through the second 2 3 5 Sample Pressure Thesamplepointshouldbeequippedwithametallicdiaphragmpressure regulatorandthepressurereducedtobetween10and50psig Theregulator shouldbeins...

Страница 12: ...ore thannormalbarometricpressurefluctuations 4 Theventlinesmustbeinstalledsothatwateranddustcannotaccu mulate in them Apressuredifferentialexistingatthecellbetweenthereferenceandsample willresultinacorrespondingchangeinoutputsignal Thereferenceandsample pathflowmetersarelocatedupstreamfrom thecellsothatbothcellpathscan ventdirectlytoatmosphere Therandombounceofthefloatsintheflowmeters whenlocatedd...

Страница 13: ...evalvetotherightofthe SAMPLEFLOW flowmeterforanindi catedflowrateof0 3scfh 3 4 Warmup Awarm upperiodoftwenty four 24 hoursisrecommendedtostabilize theinterioroftheanalyzeratthecontroltemperaturelevel Untilthemeasuring celltemperaturehasequilibratedwiththecontroltemperature theoutputsignal willdrift Duringthewarmupperiod checktherecorderperiodically Asthedrift rate decreases increase the sensitivit...

Страница 14: ...ndsfordoubtingthespangasmixture Becauseofthedifficultyinvolvedin obtainingpreciseanalysisofsmallamountsofimpuritiesincylindergas and becauseoftheeasewithwhichthegascanbecontaminatedsubsequentto analysis anylargeerrorinresponsetothespangasshouldbesuspect Insucha caseTAIrecommendsthattheanalyzerbeoperatedattherecommendedspan settinguntilthespangasisreanalyzed Ifadjustmentofthespancontrolisnecessaryt...

Страница 15: ...t the float is visibly elevated from the bottom of the tube and then readjust the sample flowrate to 0 3 scfh No furtheradjustmentsarerequired NOTE Although the bellows type valves used in the input manifold are among the best available TAI suggests that the span gas be turned OFF at the cylinder when not in use and the span line relieved of pressure before closing the analyzer span valve Such a p...

Страница 16: ...regulatorisquestionableatpressuresbelowthispoint Whenreplacingsupplycylinders besuretobleedthegasthroughthe cylinder valve while installing the pressure regulator see Section 2 3 4 It is also advisable to check the connections with soap water whenever a supply cylinder is changed 4 3 Standardization Theanalyzermustbecompletelyrestandardizedwheneverthereference gassupplyisreplaced Barringunforeseen...

Страница 17: ...gas flowingbesurethattheanalyzerhasstabilizedontheRange 1positionbefore re standardizationisattempted 6 TROUBLE SHOOTING 6 1 Preliminary Iftheanalyzerissuspectedofincorrectoperation asapreliminaryto evaluation always arrange the input manifold so that zero gas is flowing through the sample path of the analyzer Never attempt to evaluate the performance of the instrument with sample gas flowing Anal...

Страница 18: ...ldbemadeuntilalltheafore mentionedpreliminarieshavebeencompletedandanynecessaryremedial repairseffected 6 2 Loss of Zero Control IflossofzerocontrolonRange 1isexperiencedduringinitialstartupor afterthereferencegassupplyhasbeenchanged thedynamicbalanceprocedure mustberepeated Lossofzerocontrol undersuchcircumstances indicatesthattheimpurity concentrationwithinthereferencegasisdifferentthanthatofthe...

Страница 19: ...g temperature be cause of the inherent thermal junctions within the potentiometers themselves The minute voltages produced by contact between the dissimilar materials within the potentiometers are effectively balanced out in the procedure when it is accomplished at operating temperature Because the voltage generated by these junctions varies with temperature and because the analyzer will resolve a...

Страница 20: ...ment turn CW This will bring the signal out of the baseline noise which could otherwise cause non linear response at the low concentration end NOTE Due to minute differences between measuring cells and the electronics in the bridge circuit found in vari ous instruments some analyzers will have to be bal anced at a point higher than 10 of scale while others can be balanced even closer to electrical...

Страница 21: ...ulting signaldriftwouldbeerraticandcouldbeeitherbi directionalor unidirectional 4 Acidinthesamplingsystem solderingfluxes willproducecontinu ous uncontrollable unidirectional output signal drift Sample tubing that has been treated with descaling chemicals if subject to above ambient temperatures will outgas continuously Any form of acid in the sampling system will outgas at high temperatures and a...

Страница 22: ...ium flowing Keep the flowrate low so as not to disturbthetemperatureequilibriumoftheanalyzerinterior 4 Observe the recorder If any leaks are present in the interior sampling system the recorder will be driven off scale in one direction or the other NOTE The analyzer should be on Range 1 and the zero control adjusted so that the recorder is reading mid scale The direction the recorder indication mo...

Страница 23: ...ol card is included among the drawings at the rear of the manual 2 Ifthefusewillnotholdwiththeboardremoved a short isindi cated in the fan the heater resistors or the interconnecting wiring Withtheboardremoved checkwiringandcomponents for short circuits 3 Ifthefanisrunning connectanACvoltmeteracrossanyoneof the heater resistors on the fan assembly the meter should be set to read 50 VAC In a proper...

Страница 24: ...diately After the area around the thermistor cools the voltage across the heater resistors should again climb to 47 volts Such action indicates a properly functioning heater circuit If the meter stays in the 47 volt region the circuit card will have to be replaced 7 0 CALIBRATION DATA FOR MODEL 212R SERIAL NUMBER 195929 7 1 Ranges Therangesoftheanalyzerare RangeSwitchPosition 1 0 50 000 ppm N2 in ...

Страница 25: ...equivalentimpurityoflessthan3 ofrange1 Theimpurityratio mustremainconstant Whenthereferencegassupplyisreplaced theanalyzer mustbere standardized 7 4 2 Zero Gas Becauseofthedifficultiesinvolvedinobtainingagasinpureform thezero gasmustbepurchasedfromasupplierwhowillcertifythecylinderastoits content Theequivalentimpurityconcentrationofthegasmustbelessthan3 ofrange1 Whenthezerogasisintroducedforstanda...

Страница 26: ...dSampleFlowrates 0 3SCFH Bypass Flowrate 3 0 SCFH NOTE Cylinder and sample stream pressure settings must be adjusted in order to maintain the above flowrates when switching from one sample to another RECOMMENDED SPARE PARTS LIST QUANTITY PART NO DESCRIPTION 1 A 6251 MeasuringCellBlockAssembly 1 A 6981 ProportionalTemperatureControl 1 F 45 SampleFlowmeterTube 1 F 22 SampleFlowmeterBypassTube Aminim...

Страница 27: ...56 Outline Diagram D 73212 Final Assembly A 72035 Piping Diagram C 73085 Main PCB Schematic C 73088 Power Supply PCB Schematic Replacement Parts Order Information A minimum charge of 150 00 is application to all spare parts orders Important Ordersforreplacementpartsshouldincludetheart number ifavailable andthemodelandserialnumberoftheinstrument forwhichthepartisintended TeledyneAnalyticalInstrumen...

Страница 28: ...l Range ID LED S Detector Thermal conductivity sensor Signal Output 0 1VDC negative ground 4 20maDC Isolated ground Accuracy 2 fullscaleformost binarymixture atconstanttemperature 5 ofFull Scaleoveroperatingtemperature once temperatureequilibriumhasbeen achieved Operating Temperature 20 30 C 68 F to 85 F Sample Requirement Sample 0 3SCFH Reference 0 1SCFH Display DigitalLEDreadout 3 Digit Mounting...

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