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Thermal Conductivity Analyzer

Maintenance   5

5-5

Teledyne Analytical Instruments

5.6

Cell, Heater, and/or Thermistor
Replacement

The Thermal Conductivity Cell, with its Heater and Thermistor, is

mounted inside the insulated cell compartment, just behind the analyzer's
front panel access door. To remove the one of these components, you must
first slide the entire Cell Compartment out of the analyzer through the front
panel access door as described in the procedure below. Figure 5-5 identifies
the five screws that must be removed in order to remove the Cell Compart-
ment.

5.6.1 Removing the Cell Compartment

WARNING: IF THE MODEL 2000 ANALYZER HAS BEEN USED

WITH TOXIC GASES, FLUSH IT THOROUGHLY
BEFORE PERFORMING THIS PROCEDURE.

WARNING: DISCONNECT ALL POWER TO THE MODEL 2000

BEFORE PERFORMING THIS PROCEDURE.  FAIL-
URE TO DO SO, MAY CAUSE ELECTRIC SHOCK.

Figure 5-5: Location of Cell Compartment Retaining Screws

To remove the Cell Compartment:

a. Disconnect gas and electrical connections to the analyzer.

Содержание 2000A-EU

Страница 1: ... 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 ONLY AUTHORIZED PERSONNEL SHOULD CONDUCT MAINTENANCE AND OR SERVICING BEFORE CONDUCTING ANY MAINTENANCE OR SERVICING CONSULT WITH AUTHORIZED SUPERVISOR MANAGER DANGER P NM66182 07 ...

Страница 2: ...s 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 instrumen...

Страница 3: ... selector panel and control valves are electronically controlled to provide synchronization with the analyzer s operations 2000A G Stainless steel cell block with nickel filaments and Stainless Steel fittings and tubing 2000A H Stainless steel cell block with gold filaments for corrosive gas streams and Stainless Steel fittings and tubing 2000A K 19 Rack Mount available with either one or two anal...

Страница 4: ...of the equipment CAUTION Risk of Electric Shock COMBUSTIBLE GAS USAGE WARNING DANGER This is a general purpose instrument designed for usage in a nonhazardous area It is the customer s responsibility to en sure safety especially when combustible gases are being ana lyzed since the potential of gas leaks always exist The customer should ensure that the principles of operating of this equipment is w...

Страница 5: ...ity 2 3 2 2 4 Measurement Results 2 3 2 3 Electronics and Signal Processing 2 3 2 4 Temperature Control 2 5 3 Installation 3 1 Unpacking the Analyzer 3 1 3 2 Mounting the Analyzer 3 1 3 3 Electrical Connections Rear Panel 3 3 3 3 1 Primary Input Power 3 4 3 3 2 Primary Input Power 3 4 3 3 3 50 Pin Equipment Interface Connector 3 4 3 3 3 1 Analog Outputs 3 5 3 3 3 2 Alarm Relays 3 6 3 3 3 3 Digital...

Страница 6: ...inearity with ALGORITHM 4 10 4 4 The Zero and Span Functions 4 11 4 4 1 Zero Cal 4 12 4 4 1 1 Auto Mode Zeroing 4 12 4 4 1 2 Manual Mode Zeroing 4 13 4 4 1 3 Cell Failure 4 14 4 4 2 Span Cal 4 14 4 4 2 1 Auto Mode Spanning 4 15 4 4 2 2 Manual Mode Spanning 4 15 4 5 The Alarms Function 4 16 4 6 The Range Function 4 18 4 6 1 Manual Select Define Range Screen 4 19 4 6 2 Auto Single Application Screen...

Страница 7: ...e Replacement 5 2 5 5 Major Internal Components 5 3 5 6 Cell Heater and or Thermistor Replacement 5 5 5 6 1 Removing the Cell Compartment 5 5 5 6 2 Removing and Replacing the Cell Block 5 6 5 6 3 Removing the Heater and or Thermocouple 5 7 5 7 Cleaning 5 4 5 8 Phone Numbers 5 5 Appendix A 1 Specifications A 1 A 2 Recommended 2 Year Spare Parts List A 3 A 3 Drawing List A 4 A 4 19 Inch Relay Rack P...

Страница 8: ...viii Model 2000A EU ...

Страница 9: ...ecific mixture of background gases measure the purity of a sample stream containing a single impurity or a mixture of impurities The standard 2000 is preprogrammed with automatic linearization algorithms for a large number of gases and gas mixtures The factory can add to this data base for custom applications or the sophisticated user can add his own unique application This manual covers the Model...

Страница 10: ...or multiple applications Recalibrat ing one recalibrates all Automatic independent linearization for each range Auto Ranging allows analyzer to automatically select the proper preset range for a given single application Manual override allows the user to lock onto a specific range of interest RS 232 serial digital port for use with a computer or other digital communications device Two adjustable c...

Страница 11: ...r those that apply to your Model 2000A analyzer Some standard models that are not covered in this manual are listed here Models 2000B NEMA 4 bulkhead mounted enclosure for general purpose nonhazardous environments Models 2010 Split architecture models using a sealed explosion proof enclosure for the Analysis Unit and a general purpose remote Control Unit for installation in a safe area Models 2020...

Страница 12: ...t up the user definable ranges for the instrument Data Entry Keys Six touch sensitive membrane switches are used to input data to the instrument via the alphanumeric VFD display Left Right Arrows Select between functions currently displayed on the VFD screen Up Down Arrows Increment or decrement values of functions currently displayed Enter Moves VFD on to the next screen in a series If none remai...

Страница 13: ... the instrument When chassis is exposed or when access door is open and power cable is connected use extra care to avoid contact with live electrical circuits Access Door For access to the thermal conductivity sensor or the front panel electronics the front panel swings open when the latch in the upper right corner of the panel is pressed all the way in with a narrow gauge tool Accessing the main ...

Страница 14: ...us 0 1 V dc range ID and isolated 4 20 mA dc plus 4 20 mA dc range ID Alarm Connections 2 concentration alarms and 1 system alarm Remote Valve Used in the 2000 for controlling external solenoid valves only Remote Span Zero Digital inputs allow external control of analyzer calibration Calibration Contact To notify external equipment that instrument is being calibrated and readings are not monitorin...

Страница 15: ...ves under the complete control of the Model 2000 electronics See section 3 3 A sample system must be provided for introduction of zero and span gas as well as sample gas into the sample path and for controlling the flowrates through the sample and reference paths of the analyzer Appropri ate pressure reducing regulators must be installed at all gas supply sources Gas Connector and Control Panels f...

Страница 16: ...1 8 1 Introduction Model 2000A EU Teledyne Analytical Instruments ...

Страница 17: ...ls all signal processing input output and display functions for the analyzer 2 2 Sensor Theory For greater clarity Figure 2 1 presents two different illustrations a and b of the operating principle of the thermal conductivity cell 2 2 1 Sensor Configuration The thermal conductivity sensor contains two chambers one for the reference gas of known conductivity and one for the sample gas Each chamber ...

Страница 18: ...compensate for diurnal effects in the output over the operating ranges of the analyzer See Specifications in the Appendix for details 2 2 2 Calibration Because analysis by thermal conductivity is not an absolute measure ment calibration gases of known composition are required to fix the upper and lower parameters zero and span of the range or ranges of analysis These gases must be used periodicall...

Страница 19: ...oy the analyzer to detect a specific component in a sample stream the sample must be composed of the component of interest and one other gas or specific and constant mixture of gases in order for the measured heat transfer differences to be nonambiguous If on the other hand the user is primarily interested in the purity of a process stream and does not require specific identification of the impuri...

Страница 20: ...nts The Preamplifier board is mounted on top of the Motherboard as shown in the figure in chapter 5 These boards are accessible after removing the back panel Figure 2 2 is a block diagram of the Analyzer electronics Figure 2 2 Block Diagram of the Model 2000 Electronics ...

Страница 21: ...ifier is sent to an 18 bit analog to digital converter The digital concentration signal along with input from the control panel is processed by the CPU and passed on to the 12 bit DAC which outputs 0 1 V dc Concentration and Range ID signals An voltage to current converter provides 4 20 mA dc concentration signal and range ID outputs The CPU also provides appropriate control signals to the Display...

Страница 22: ...2 6 2 Operational Theory Model 2000A EU Teledyne Analytical Instruments ...

Страница 23: ...ittings that mate with the 1 8 NPT gas ports on the Model 2000A are not included They must be supplied by the customer 3 2 Mounting the Analyzer The Model 2000A is for indoor use in a general purpose area It is NOT for hazardous environments of any type It must be protected from Direct sunlight Drafts of air Shock and vibration Temperatures below 30 F 1 C or above 110 F 43 C Locate the 2000A as cl...

Страница 24: ...he outline drawing at the back of this manual for overall dimensions On special order a 19 rack mounting panel can be provided For rack mounting one or two 2000A series analyzers are flush panel mounted on the rack panel See Figure 3 1b for dimensions of the mounting panel Figure 3 1a Front Panel of the Model 2000A Figure 3 1b Single and Dual 19 Rack Mounts 6 7 5 75 5 75 8 75 8 75 ...

Страница 25: ...e center of the latch upper right corner is pressed all the way in with a narrow gauge tool less than 4 5 mm wide such as a small hex wrench or screwdriver Allow clearance for the door to open in a 90 degree arc of radius 19 3 cm See Figure 3 2 Figure 3 2 Required Front Door Clearance 3 3 Electrical Connections Rear Panel Figure 3 3 shows the Model 2000A EU rear panel There are connec tors for pow...

Страница 26: ...G AS THE INSTRUMENT IS CON NECTED TO THE POWER SOURCE THE STANDBY ON THE FRONT PANEL IS FOR SWITCHING POWER ON OR OFF TO THE DISPLAYS AND OUT PUTS ONLY The standard power supply requires a 110 V ac 50 60 Hz power source If you have the N option you will require 220 V ac 50 60 Hz power 3 3 2 Fuse Installation The fuse block at the right of the power cord receptacle accepts US or European size fuses...

Страница 27: ...concentration from 4 mA at 0 concentration to 20 mA at full scale Full scale 100 of programmable range 4 20 mA dc Range ID 8 mA Range 1 12 mA Range 2 16 mA Range 3 20 mA Range 4 Table 3 1 Analog Output Connections Pin Function 3 Range ID 4 20 mA floating 4 Range ID 4 20 mA floating 5 Range 4 20 mA floating 6 Range 4 20 mA floating 8 Range ID 0 1 V dc 23 Range ID 0 1 V dc negative ground 24 Range 0...

Страница 28: ...an indication of the range the Range ID analog outputs are used They generate a steady preset voltage or current when using the current outputs to represent a particular range Table 3 3 gives the range ID output for each analysis range Table 3 3 Analog Range ID Output Example Range Voltage V Current mA Application Range 1 0 25 8 0 1 H2 in N Range 2 0 50 12 0 10 H2 in N Range 3 0 75 16 0 1 H2 in Ai...

Страница 29: ... Actuates when DC power supplied to circuits is unacceptable in one or more parameters Perma nently configured as failsafe and latching Cannot be defeated Actuates if self test fails Reset by pressing button to remove power Then press again and any other button EXCEPT System to resume Further detail can be found in chapter 4 section 4 5 Table 3 4 Alarm Relay Contact Pins Pin Contact 45 Threshold A...

Страница 30: ...roing See Remote Calibration Protocol below Table 3 5 Remote Calibration Connections Pin Function 9 Remote Zero 11 Remote Zero 10 Remote Span 12 Remote Span 40 Cal Contact 41 Cal Contact Remote Calibration Protocol To properly time the Digital Remote Cal Inputs to the Model 2000A Analyzer the customer s controller must monitor the Cal Relay Contact When the contact is OPEN the analyzer is analyzin...

Страница 31: ...ding order For example if all ranges have the same application then the lowest range is assigned to the Range 1 ID relay and the highest range is assigned to the Range 3 ID relay Range 4 is the Cal Range ID relay Table 3 6 lists the pin connections Table 3 6 Range ID Relay Connections Pin Function 21 Range 1 ID Contact 38 Range 1 ID Contact 22 Range 2 ID Contact 39 Range 2 ID Contact 19 Range 3 ID...

Страница 32: ... circuitry to provide the actual driving current In addition each individual line has a series FET with a nominal ON resistance of 5 ohms 9 ohms worst case This could limit the obtainable voltage depending on the load impedance applied See Figure 3 7 Figure 3 6 FET Series Resistance 3 3 4 RS 232 Port The digital signal output is a standard RS 232 serial communications port used to connect the anal...

Страница 33: ...enter Toggling input Stops Starts any status message output from the RS 232 until st enter is sent again Implementation The RS 232 protocol allows some flexibility in its implementation Table 3 8 lists certain RS 232 values that are required by the Model 2000A implementation Table 3 8 Required RS 232 Options Parameter Setting Baud 2400 Byte 8 bits Parity none Stop Bits 1 Message Interval 2 seconds...

Страница 34: ...If you have purchased a gas control panel from Analytical Instru ments the drawings at the back of this manual will contain a dimension outline drawing with the modified cutout and hole pattern for mounting and a drawing and or addendum showing the gas connections Front Panel with optional selector panel as shown ...

Страница 35: ...owmeter that can resolve 150 cc min 0 3 scfh for the sample path of the analyzer Note The sample line pressure regulator should be installed as close to the sample point as possible to minimize sample line lag time 3 4 2 Pressure and Flowrate Regulation Appropriate pressure reducing regulators must be installed at all gas supply sources To minimize flowrate adjustments the pressure regulators on t...

Страница 36: ...ctions must be consistent with the hazard level of the constituent gases Check local state and federal laws and ensure that the exhaust stream vents to an appropriately controlled area if required If not vented to the same area both VENT lines must vent to areas with equal ambient pressures and pressures must vary no more than the normal barometric changes Install VENT lines such that water and di...

Страница 37: ... the same cylinder of gas be used for both the REFERENCE gas and the ZERO gas Pressure flow and safety considerations are the same as prescribed for the SAMPLE gas above 3 4 6 ZERO Gas For the ZERO gas a supply of the background gas usually containing none of the impurity is required to zero the analyzer during calibration For suppressed zero ranges the zero gas must contain the low end concen tra...

Страница 38: ...following operations 1 Repeat the Self Diagnostic Test as described in chapter 4 section 4 3 5 3 6 Warm Up at Power Up Every time the unit is turned on the instrument stays with the intro duction screen for thirty minutes This is to allow the cell to come up to temperature 60o C The only way to bypass this warm up period is by pressing any key once such as the Enter key The instrument warms up for...

Страница 39: ...sired RoutineOperation Calibratetheinstrument Choose autoranging or select a fixed range of analysis Set alarm setpoints and modes of alarm operation latching failsafe etc Program Reprogramtheanalyzer Define new applications Linearize your ranges Ifyouchoosenottousepasswordprotection thedefaultpasswordis automaticallydisplayedonthepasswordscreenwhenyoustartup andyou simplypressEnterforaccesstoallf...

Страница 40: ... model and software version Adjust LCD screen contrast Displaymoresubfunctions Two of these are for programming reprogramming the analyzer Define gas applications and ranges Refer to programming section or contact factory Use the Curve Algorithm to linearize output Refer to programmingsection orcontactfactory Zero Used to set up a zero calibration Span Used to set up a span calibration Alarms Used...

Страница 41: ...nearity Cal Input Output Values Select Linrty Span Values Enter Enter Auto Ver Set Span Span Value Set Span in Progress Auto Manual Span Select Zero Auto Manual Zero Select Zero in Progress Alarms Range Gas Use ppm Select Select Alarm Setpoints Attributes Yes Range Auto Manual Range Adj Gas Application Auto Man Define Range Select Range Analyze Analyze Sample Set LCD Contrast Show Model and Versio...

Страница 42: ... to gain access to set up functions which alter the instrument s operation LOGOUT Logging out prevents an unauthorized tampering withanalyzersettings MORE Select and enter MORE to get a new screen with additionalsubfunctionslisted MODEL Displays Manufacturer Model and Software Version ofinstrument APPLICATION A restricted function not generally accessed by theenduser Usedtodefineuptothreeanalysisr...

Страница 43: ...llow the precautions given there Note If you require highly accurate AUTO CAL timing use external AUTO CAL control where possible The internal clock in the Model 2000 is accurate to 2 3 Accordingly internally sched uled calibrations can vary 2 3 per day Note If all your ranges are for the same gas application then AUTO CAL will calibrate whichever range you are in at the scheduled time for automat...

Страница 44: ...ned 4 3 3 Password Protection Beforeauniquepasswordisassigned thesystemassignsTAIbydefault Thispasswordwillbedisplayedautomatically Theoperatorjustpressesthe Enterkeytobeallowedtotalaccesstotheinstrument sfeatures Ifapasswordisassigned thensettingthefollowingsystemparameterscan bedoneonlyafterthepasswordisentered alarmsetpoints assigninganew password range applicationselections andcurvealgorithmli...

Страница 45: ... keystoscrollbackandforthbetweenletters andthe arrowkeystochange the letters to the proper password Press Enter to enter the password Inafewseconds youwillbegiventheopportunitytochangethispass word or keep it and go on Change Password ENT Yes ESC No Press Escape to move on or proceed as in Changing the Password below 4 3 3 2 InstallingorChangingthePassword Ifyouwanttoinstallapassword orchangeanexi...

Страница 46: ...newpassword pressEnter Averifica tionscreenappears Thescreenwillpromptyoutoretypeyourpasswordfor verification Enter PWD To Verify A A A Use the arrow keys to retype your password and press Enter when finished Yourpasswordwillbestoredinthemicroprocessorandthesystemwill immediatelyswitchtotheAnalyzescreen andyounowhaveaccesstoall instrumentfunctions Ifallalarmsaredefeated theAnalyzescreenappearsas Ø...

Страница 47: ...andattheendofthetest thestatusofeachfunctionisdisplayedonthescreen eitherasOKorasa number between 1 and 1024 See System Self Diagnostic Test in chapter 5 fornumbercode Ifanyofthefunctionsfails theSystemAlarmistripped Note The sensor will always show failed unless identical gas is present in both channels at the time of the SELF TEST Theselfdiagnosticsarerunautomaticallybytheanalyzerwheneverthe ins...

Страница 48: ...ssEnter Thescreendisplaysthemanufacturer model andsoft wareversioninformation 4 3 7 Checking Linearity with ALGORITHM From the System Function screen select ALGORITHM and press Enter Rangelinearization Ø1 Ø2 Ø3 Use the keys to select the range 01 02 or 03 Then press Enter Range Ø 16 Gas use O2 N2 PressEnteragain Algorithmsetup VERIFY SET UP Select and EnterVERIFY to check whether the linearization...

Страница 49: ...alRange andtheanalysisranges ifmorethanone maybeprogrammedforseparateoridenticalgasapplications 2 Ifallrangesareforthesameapplication thenyouwillnotneedtheCal Range Calibratinganyoneoftherangeswillautomaticallycalibratetheothers 3 If a eachrangeisprogrammedforadifferentgasapplication b your sensorcalibrationhasdriftedlessthan10 andc yourCalRangewascali bratedalongwithyourotherrangeswhenlastcalibra...

Страница 50: ...in the Cal Range Make sure the zero gas is flowing to the instrument If you get a CELL CANNOT BE BALANCED message while zeroing skip to section 4 4 1 3 4 4 1 1 AutoModeZeroing Observe the precautions in sections 4 4 and 4 4 1 above Press Zero to enterthezerofunctionmode Thescreenallowsyoutoselectwhetherthezero calibrationistobeperformedautomaticallyormanually Usethe arrow keys to toggle between AU...

Страница 51: ...etween AUTO and MAN zero settling Stop when MANUAL appears blinking onthedisplay Selectzero mode MANUAL PressEntertobeginthezerocalibration Afterafewsecondsthefirstof threezeroingscreensappears Thenumberintheupperlefthandcorneristhe first stagezerooffset Themicroprocessorsamplestheoutputatapredeter minedrate O2 N2 Zero adj 2048 C Zero TheanalyzergoesthroughC Zero F Zero andS Zero DuringC Zero and ...

Страница 52: ...s downstream from the sensor where contamina tion may be leaking into the system If there are no leaks and the zero gas is OK the sensor may need to be replaced Checkwarranty andcontactAnalyticalInstrumentsCustomerSer vice 4 4 2 Span Cal TheSpanbuttononthefrontpanelisusedtospancalibratetheanalyzer Spancalibrationcanbeperformedineithertheautomaticormanualmode CAUTION If you are spanning the Cal Ran...

Страница 53: ...rmationon Slope Spanningautomaticallyendswhenthespanoutputcorresponds within tolerance tothevalueofthespangasconcentration Thentheinstrumentauto maticallyreturnstotheanalyzemode 4 4 2 2 ManualModeSpanning PressSpantostarttheSpanfunction Thescreenthatappearsallows youtoselectwhetherthespancalibrationistobeperformedautomaticallyor manually Selectspan mode MANUAL Use the keys to toggle between AUTO a...

Страница 54: ...einChapter3 Installationand ortheInterconnectionDiagramincludedatthebackofthis manualforrelayterminalconnections Thesystemfailurealarmhasafixedconfigurationdescribedinchapter3 Installation Theconcentrationalarmscanbeconfiguredfromthefrontpanelaseither high or low alarms by the operator The alarm modes can be set as latching or non latching and either failsafe or non failsafe or they can be defeate...

Страница 55: ...defeat alarm mode is incorporated into the alarm circuit so that maintenance can be performed under conditions which would normally activate the alarms The defeat function can also be used to reset a latched alarm See procedures below Ifyouareusingpasswordprotection youwillneedtoenteryourpassword toaccessthealarmfunctions Followtheinstructionsinsection4 3 3toenter yourpassword Onceyouhaveclearance...

Страница 56: ...n press either two times or two times Toggle it to Y and then back to N OR Go to Ltch and then press either two times or two times Toggle it to N and back to Y 4 6 The Range Select Function TheRangefunctionallowsyoutomanuallyselecttheconcentration range of analysis MANUAL or to select automatic range switching AUTO In the MANUAL screen you are further allowed to define the high and low concentrati...

Страница 57: ...enpressEnter Gas use O2 N2 Range Ø 16 Usethe keystotogglebetweentheRange low endfieldandthe Range high endfield Usethe keystochangethevaluesofthefields PressEscapetoreturntothepreviousscreentoselectordefineanother range PressEntertoreturnthetotheAnalyzefunction 4 6 2 Auto Single Application Screen TheAutoscreenrequiresyoutoselectanapplication previouslydefinedin theSystemfunction Itthenautomatical...

Страница 58: ...eredefinedusingtheSystem function iftheyarenotalreadydefinedasnecessary CAUTION Redefining applications or ranges might require relinearization and or recalibration Tosetupautomaticranging PressRangekeytostarttheRangefunction Select range mode Range mode AUTO Note If all three ranges are currently defined for different applica tion gases then the above screen does not display because mode must be ...

Страница 59: ...obeavoidedinclude Ranges that overlap Ranges whose limits are entirely within the span of an adjoining range Figure4 2illustratestheseschemesgraphically Figure 4 2 Examples of Autoranging Schemes 4 7 The Analyze Function Normally allofthefunctionsautomaticallyswitchbacktotheAnalyze functionwhentheyhavecompletedtheirassignedoperations Pressingthe Escapebuttoninmanycasesalsoswitchestheanalyzerbackto...

Страница 60: ... 1 Enter the password if you are using the analyzer s password protectioncapability 2 Connect a computer or computer terminal capable of sending an RS 232 signal to the analyzer RS 232 connector See chapter 3 Installation for details Send the rp command to the analyzer OR For software 1 1 4 or later turn the instrument off and back on While on the introduction screen hold the Analyze key for at le...

Страница 61: ...aultstoautoranging Ineithercase autorangingormanualrangeselection canbeprogrammedbytheuser Intheautorangingmode themicroprocessorautomaticallyrespondsto concentrationchangesbyswitchingrangesforoptimumreadoutsensitivity Ifthe upperlimitoftheoperatingrangeisreached theinstrumentautomaticallyshifts tothenexthigherrange Iftheconcentrationfallstobelow85 offullscaleof thenextlowerrange theinstrumentswit...

Страница 62: ...t to 0 50 since that makes Range 3 lower than Range 2 Ranges alarms andspansarealwayssetineitherpercentorppmunits as selectedbytheoperator eventhoughallconcentration dataoutputschange fromppmtopercentwhentheconcentrationisabove9999 ppm Note When performing analysis on a fixed range if the concentra tion rises above the upper limit as established by the operator for that particular range the output...

Страница 63: ...ect ALGORITHM and press Enter Rangelinearization Ø1 Ø2 Ø3 Use the keys to select the range 01 02 or 03 Then press Enter Range Ø 16 Gas use O2 N2 PressEnteragain Algorithmsetup VERIFY SET UP Select and EnterVERIFY to check whether the linearization has been accomplishedsatisfactorily Dpt INPUT OUTPUT Ø Ø ØØ Ø ØØ Theleftmostdigit underDpt isthenumberofthedatapointbeingmoni tored Usethe keystoselectt...

Страница 64: ...inearizemanually youmusthavepreviousknowledgeofthenonlinear thermal conductivitycharacteristicsofyourgases Youenterthevalueofthe differentialbetweentheactualconcentrationandtheapparentconcentration analyzeroutput AnalyticalInstrumentshastabulardataofthistypeforalarge numberofgases whichitmakesavailabletocustomersonrequest SeeAppen dixfororderinginformation Toenterdata From the System Functions Scr...

Страница 65: ...eachofthedatapointsyouaregoinguseinyourlinearization First theanalyzeriszeroedandspannedasusual Then eachspecialspangas for eachoftheintermediatecalibrationpoints isflowed inturn throughthesensor Aseachgasflows thedifferentialvalueforthatintermediatecalibrationpointis enteredfromthefrontpaneloftheanalyzer Beforestartinglinearization performastandardcalibration Seesection 4 4 Toenterdata From the S...

Страница 66: ...ntrationwouldcorrespondtothezerolevel 4mA0V oftheoutputsignal Then 85 oxygen 15 argon wouldcorrespondto 20mA 1V inthesignaloutput Itmaybeconvenientfortheusertohavetheoutputsreversedsothatthe 85 100 oxygenleveloutputsa4 20mA 0 1V signalrespectively Thiscan beaccomplishedbyreversingthedatainputtothecustomsettings Notall applicationswillrequireareversingfunction however ifthisisdesirable itmust bespe...

Страница 67: ...negativewithitproperspangasorthecalculationisnotsatisfied settheS1accordinglytothetablebelow Close S1 5 range 1 Close S1 6 range 2 Close S1 7 range 3 CloseS1 8calrange PressI Otorestartthesystem 4 9 4 Special Nonlinear Application Gain Preset NOTE This section apply during GAS TEST routine for the unit that has more than one range install with nonlinear output applica tion Thestepsareasfollows 1 S...

Страница 68: ...0A EU 4 30 Teledyne Analytical Instruments 6 Press and hold the RIGHT key for approximate 5 to 7 seconds 7 SelectAUTOandsetthereadingtospangaslevel Press ENTERkey Repeat steps 1 to 7 if more than two ranges need to be setup ...

Страница 69: ...ration see Section 4 4 Calibration WARNING SEE WARNINGS ON THE TITLE PAGE OF THIS MANUAL 5 2 System Self Diagnostic Test 1 Press the System button to enter the system mode 2 Use the arrow keys to move to More and press Enter 3 Use the arrow keys to move to Self Test and press Enter The following failure codes apply Table 5 1 Self Test Failure Codes Power 0 OK 1 5 V Failure 2 15 V Failure 3 Both Fa...

Страница 70: ... Display NOTE Vaccum Fluorescent Display is used It does not need contrast adjustment If you cannot read anything on the VFD especially after first powering up check thead VFD cable is not loose 5 4 Fuse Replacement 1 Place small screwdriver in notch and pry cover off as shown in Figure 5 1 Figure 5 1 Removing Fuse Block from Housing 2 To change between American and European fuses remove the singl...

Страница 71: ...r panel retaining screws and sliding out the entire subassembly See Figure 5 3 below The major elec tronic components locations are shown in Figure 5 4 with Cell Compart mentremovedforclarity WARNING SEE WARNINGS ON THE TITLE PAGE OF THIS MANUAL CAUTION The front and rear panels and all parts of the instru ment case must be tightly closed for CE mark com pliance to be in effect The 2000A contains ...

Страница 72: ...ents Figure 5 3 Rear Panel Retaining Screws To detach the rear panel remove only those screws marked with an X Figure 5 4 Locations of Printed Circuit Board Assemblies See the drawings in the Drawings section in back of this manual fordetails X X X X X X X X X X ...

Страница 73: ...hrough the front panel access door as described in the procedure below Figure 5 5 identifies the five screws that must be removed in order to remove the Cell Compart ment 5 6 1 Removing the Cell Compartment WARNING IF THE MODEL 2000 ANALYZER HAS BEEN USED WITH TOXIC GASES FLUSH IT THOROUGHLY BEFORE PERFORMING THIS PROCEDURE WARNING DISCONNECT ALL POWER TO THE MODEL 2000 BEFORE PERFORMING THIS PROC...

Страница 74: ...the front of the analyzer There is enough length to the cell s electrical wiring to allowthis e After replacing the necessary component and reassembling the Cell Compartment Replace the Compartment by reversing the above procedure steps a through d 5 6 2 Removing and Replacing the Cell Block a Refer to Figure 5 6 which illustrates removal of the Cell Block from the Cell Compartment Exploded view i...

Страница 75: ...Cell cable at the Preamplifier PCB connector J3 See Figure 5 4 and or drawings at the rear of this manual The Preamplifier PCB can be more easily accessed by removing the analyzer s rear panel See Section 5 5 f Replace the cell by reversing the above procedure steps a through e 5 6 3 Removing the Heater and or Thermocouple a Refer to Figure 5 7 which illustrates removal of the Thermistor and or He...

Страница 76: ...ard See Figures 5 4 and 5 7 5 6 4 Replacing the Heater and or Thermocouple a To replace the Heater and or Thermocouple coat the new element with silicone sealing compound and insert it into the duct CAUTION The larger duct is for the Heater element and the smaller duct is for the Thermocouple b Enough sealing compound should be on the element to spill over and seal around the wire where it enters ...

Страница 77: ...nt panel while the instrument is controlling your process Clean the front panel as prescribed in the above paragraph 5 8 Phone Numbers CustomerService 626 934 1673 Environmental Health and Safety 626 961 9221 Extension 230 Fax 626 961 2538 TWX 910 584 1887 TDYANYL COID EMERGENCY ONLY 24 hour pager 1 800 759 7243 PIN 1858192 ...

Страница 78: ...5 Maintenance Model 2000A EU 5 10 Teledyne Analytical Instruments ...

Страница 79: ...anttemperature 5 of full scale over operating temperature range once temperature equilibrium has been reached Response Time 90 in less than 50 seconds SystemOperating Temperature 32 F to 122 F 0 50 C Sensor Type StandardTCcell 4 filamentdetector SignalOutput Two 0 1 VDC concentration and range ID Two 4 20 mADC isolated concentration and range ID Alarm Twofullyprogrammableconcentrationalarm set poi...

Страница 80: ...ith nickel alloy filamentsandstainlesssteelplates O PInterface Full duplex RS 232 implement a subset of Tracs Command Mounting Standard General purpose flush panel mounting Options General purpose rack mounted to contain either one or two in a 19 rack mountable plate RelativeHumidity Up to 99 Altitude 1 609 m Other configurations including a totally explosion proof areavailable ...

Страница 81: ... 20 mm T SlowBlow European 1 CP1798 Plug 50 pin D sub Connector 1 CP1802 ShieldedCableClamp 50 CP1799 Solder Cup Contact for CP1798 ___________________ Selectsetoffusesaccordingly Note Orders for replacement parts should include the part number if available and the model and serial number of the instrument for which the parts are intended Orders should be sent to TELEDYNE Analytical Instruments 16...

Страница 82: ...e option to select AUTO or MANual AUTO lets the analyzer adjust itself and may take longer while in MANual mode the operator has to adjust the zero reading on the display manually using the Up and Down arrows 4 Press ZERO select manual press the arrow hold until OK is displayed in the upper right corner of the VFD display 5 If you choose manual you first will do the Coarse zero adjustment using th...

Страница 83: ...to analyzer and purge for the time needed to get readings that are leveled Feed CO2 to the analyzer 3 Press ZERO You have the option to select AUTO or MANual AUTO lets the analyzer adjust itself and may take longer while in MANual mode the operator has to adjust the zero reading on the display manually using the Up and Down button 4 Press ZERO select manual press the arrow hold until OK is display...

Страница 84: ...brated CALIBRATERANGE3 1 Select the RANGE function on the main menu and place the analyzer in Range 3 DOTHIS EVENIFANALYZERISINRANGE3 2 Feed zero gas to analyzer and purge for the time needed to get readings that are leveled Feed H2 to the analyzer 3 Press ZERO You have the option to select AUTO or MANual AUTO lets the analyzer adjust itself and may take longer while in MANual mode the operator ha...

Страница 85: ...0 00 9 The analyzer should end the span by itself if AUTO was selected or when you press the Enter switch if MANual was selected 10 This range is now calibrated CALIBRATECALRANGE 1 Select the RANGE function on the main menu and place the analyzer in the Cal Range 2 Feed zero gas to analyzer and purge for the time needed to get readings that are leveled Feed H2 to the analyzer 3 Now select the ZERO...

Страница 86: ...the time needed to get readings that are leveled Feed 10 Air in H2 90 H2 in air to the analyzer 6 Now select the SPAN function from the main menu and press Enter If you want to calibrate only the Cal Range select MANual If you want to calibrate all ranges select AUTO Set the span value to 20 0 7 The analyzer should end the span by itself if AUTO was selected or when you press the Enter if MANual w...

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