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Teledyne 7300A User's Manual

1. 4 6 1 Manual Select Define Range Screen 20 2 Auto SCIGOI TS pep IR acts 4 6 9 Precautloris ia ierra 4 7 The Analyze 4 0422 458 Programimihg ie rater eire e en ere 4 8 1 The Set Range Screen 4 8 2 Curve Algorithm Screen 4 8 2 1 Checking the Linearization 4 8 2 2 Manual Mode Linearization 4 8 2 3 Auto Mode Linearization 4 9 Special Function 4 9 1 Offset Output Reverse Output 4 9 1 1 Output Signal Reversal 4 9 1 2 Output Signal Offset cig cerca 4 9 2 Polarity RHeversal eene 4 9 3 PVCS PR 5 Maintenance 5 0 5 1 Routine Maintenance 5 3 NDIR Analyzer Measurement Cell 5 4 System Self Diagnostic 5 5 Major Internal Components 4 22 WOBUbIeShoollribj Goode E ep Erat ro E Er Ele 673 cc 5 8 Troubleshoot
2. 2 3 3 50 Pin Equipment Interface Connector 2 3 3 1 Analog Outpuls eere ereices 2 3 3 3 Digital Remote Cal Input 2 3 3 4 Range ID Relays 2 3 3 5 Network J 2 3 3 6 Remote Valve Connector 2 344 RS 232 eco hr eee 2 6 1 Calibration Fluids 2 6 2 Calibration Teledyne Analytical Instruments Table of Contents 3 Start up and Theory of Operation Su y PrelimNa N coi ter a E nO ea Oed Gerd 3 2 NDIR Analyzer set up 141211 3 2 1 Initial Set up and Zeroing 3 2 2 Operational Calibration 3 3 Theory of ODGIallOlt 3 dl Generalen roof tds eese o e Y Perm De 94 2 ANa V eate gor op pbi ul 3 4 Circuit Description udis tx canons eria i inv eed 3 5 Digital Signal Processing amp Electronics 8 6 METAS an Zee ner noa tat Fai E SP ORARE S ERIS 227 tei prm 3 8 Automatic Function es tia ioga ge Gaia 4 Operation Electrical Control Unit Modes Functioning 4 1 Introduction p E 4 2 Using the 4 2 1 Mode Function Selection 4 2 1 1 Analysis Mode 42 1 2 Set
3. OO CO S1ope HH Span The beginning span value is shown in the upper left corner of the display As the span reading settles the screen displays and updates information on Slope Spanning automatically ends when the span output corresponds within tolerance to the value of the span gas concentration Then the instrument auto matically returns to the analyze mode 4 4 2 2 Manual Mode Spanning Scroll Span by using UP DOWN key and Enter to start the Span function The screen that appears allows you to select whether the span calibration is to be performed automatically or manually Select span mode MANUAL Use the UP DOWN key to toggle between AUTO and MAN span setting Stop when MAN appears blinking on the display ENTER to move to next subfunction screen Span Val 20 00 lt ENT gt To begin span Using the UP DOWN key changes the span value as necessary Enterto move to the units field ppm Use UP DOWN key to select unit Press Enterto enter the span value into the system and begin the span calibration Once the span has begun the microprocessor samples the output ata predetermined rate Itcalculates the difference between successive samplings and displays this difference as Slope on the screen It takes several seconds for the first Slope value to display Slope indicates rate of change of the Span reading Itis a sensitive indicator of stability C02 S1ope HH Span When the Span
4. 7300 1 4 Teledyne Analytical Instruments Infrared Gas Analyzer Installation 2 2 0 Installation E Installation of the Model 7300A Infrared Gas Analyzer includes Unpacking 2 Mounting 3 Gasconnections 4 Electrical connections 3 Testing the system 2 11 Unpacking the Analyzer Inspection The analyzer is shipped with all the materials you need to install and prepare the system for operation Carefully unpack the analyzer and inspect it for damage Immediately report any damage to the shipping agent 2 2 Installing and Connecting the Analyzer The 7300A analyzer is a general purpose analyzer and as such is designed with non sealed enclosures It must be installed in an area where the ambient temperature is not permitted to drop below 32 F norrise above 100 F In areas outside these temperatures auxillary heating cooling must be supplied The 7300A enclosure is oil and dust resistant though designed to resist moisture mustnotbe considered completely water tight Mounting to walls orracks must be made securely Avoid locations that are subject to extreme vibration and sway Sufficient space must be provided around the analyzer to accommodate the necessary electrical conduit and plumbing connections The front panel must be allowed to pull out for possible service access to all components of the enclosure Refer to the system analyzer outline drawings for dimensions Regardless of configuration th
5. Check gas temperature If none ofthe above as indicated the sensor may need to be replaced Check warranty and contact Analytical Instruments Customer Service 4 4 2 Span Cal The Spanbutton on the front panel is used to span calibrate the analyzer Span calibration can be performed in either the automatic or manual mode CAUTION If you are spanning the Cal Range by itself multiple application analyzers only use manual mode zeroing A If you want to calibrate ALL of the ranges at once multiple application analyzers only use auto mode spanning in the Cal Range Make sure the span gasis flowingtothe instrument 4 4 21 Mode Spanning Observe all precautions in sections 4 4 and 4 4 2 above Scroll SPAN and enter the span function The screen that appears allows you to select whether the span calibration is to be performed automatically or manually Use the UP DOWN key to toggle between AUTO and MAN span settling Stop when AUTO appears blinking on the display Select span mode AUTO Enterto move to the next screen Span Val 20 00 lt ENT gt To begin span Use UP DOWN Rey to change the span setting value Teledyne Analytical Instruments 4 19 4 7300 ENTER will move the blinking field to units ppm Use UP DOWN key to select the units as necessary When you have set the concentration of the span gas you are using Enterto begin the Span calibration
6. Loss of CO2 or other soluble gases The sample temperature should not vary at the inlet more than 15 of the calibration temperature nor exceed the design operating specifi cations typically 1 50 9C Any background components later found to be present and not speci fied in the original application feasibility may void the instrument perfor mance should they interfere For CO2 the impurity of N2O will interfere Assume no others at mea suring wavelength We recommend when ambient temperatures exceed outside a 5 459C range that the instrument and sample system be conditioned appropri ately for heating cooling without condensation Should the general purpose or explosion proof instrument be supplied on a back panel or as a bulk mount housing the customer must install to protect the instrument to meet harsh ambient conditions for dust water snow wind corrosion etc Teledyne Analytical Instruments Infrared Gas Analyzer Appendix 10 If condensables occur such as moisture acid gases solvents etc sample system materials may be compromised for corrosion resis tance integrity Special materials may be required 11 Teledyne is not responsible for applying a general purpose instrument in a hazardous area or where a flammable gas is brought to an ana lyzer above its lower explosive limit and the area has been classified as general purpose 12 Customer must supply the necessary calibration gases at the required puritie
7. OPERATING INSTRUCTIONS Model 7300A Infrared Gas Analyzer DANGER HIGHLY TOXIC AND ORFLAMMABLELIQUIDS 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 PERSISTFORA TIME EVEN AFTER THE POWER IS TURNED OFF AND DISCONNECTED ONLY AUTHORIZED PERSONNEL SHOULD CONDUCT MAINTENANCE AND OR SERVICING BEFORE CONDUCTING MAINTENANCE OR SERVICING CONSULT WITH AUTHORIZED SUPERVISOR MANAGER P N M00000 10 13 00 ECO 00 0000 Teledyne Analytical Instruments Model 7300 Copyright 2000 Teledyne Analytical Instruments All Rights Reserved No part of this manual may be reproduced transmitted transcribed stored in a retrieval system or translated into any other language or computer language in whole or in part in any form or by any means whether it be electronic mechanical magnetic optical manual or otherwise without the prior written consent of Teledyne Analytical Instruments 16830 Chestnut Street City of Industry CA 91749 1580 Warranty This equipment is sold subject to the mutual agreement that it is warranted by us free from defects of material and of construction and that our liability shall be limited to replacing or repairing at our factory without charge except for transportation or at customer plant at our option any material or construction
8. hold feature prevents these wide output excursions from affecting the analog output and trigger alarms The Auto Zero circuit board function takes about 6 minutes to complete It is important that zero gas is continually purging the cell during this time 4 At around the 5th minute the Auto Zero solenoid valve is deactivated and sample replaces the zero gas 5 The hold feature is deactivated and the display starts reading the sample again and the analog output soon starts tracking This concludes the zero cycle The time between zero cycles may be programmed to last from one 1 to 23 hours For Purity Measurements typical zeroing is performed every 3 hours This may increase or decrease depending upon the complexity of the application involved 29 Teledyne Analytical Instruments 3 9 3 Start up Theory of Operation Model 7300 3 10 49 Teledyne Analytical Instruments Infrared Gas Analyzer Operation 4 4 1 Operation Introduction Although the Model 7300A is usually programmed to your application at the factory it can be further configured at the operator level or even cautiously reprogrammed Depending on the specifics of the application this might include all or a subset of the following procedures Setting system parameters e Establish a security password if desired requiring Operator to log in e Establish and start an automatic calibration cycle if desired Routine Operati
9. e The concentration in ppm or percent e The range in use 00 Range 1 01 Range 2 10 Range 3 11 Range 4 span of the range 0 100 96 etc e Which alarms if any are disabled AL x DISABLED Which alarms if any are tripped AL x ON Each status output is followed by a carriage return and line feed Input The input functions using RS 232 that have been implemented to date are described in Table 2 8 2 10 Teledyne Analytical Instruments Infrared Gas Analyzer Installation 2 Table 2 8 Commands via RS 232 Input Command Description as lt enter gt Immediately starts an autospan az lt enter gt Immediately starts an autozero rp lt enter gt Allows reprogramming of two System functions APPLICATION gas use and ALGORITHM linearization st lt enter gt Toggling input Stops Starts any status message output from the RS 232 until st lt enter gt is sent again Implementation The RS 232 protocol allows some flexibility in its implementation Table 2 9 lists certain RS 232 values that are required by the Model 7300A implementation Table 2 9 Required RS 232 Options Parameter Setting Baud 2400 Byte 8bits Parity none Stop Bits 1 Message Interval 2 seconds 2 4 Gas Requirements Instrument Air is required for zeroing of the Infrared Analyzer It must be free of oil particulates and water vapor that will not condensate unfiltered plant air is not recommended A supply press
10. 0 100 C2 to C5 0 5 to 0 100 Liquid Analysis Aromatics 0 5 up to 0 100 MTBE ETBE TAME 0 20 Methanol Ethanol 0 15 Isobutanes 0 75 Benzene 0 5 Water in solvents 0 5 For lower ranges and other liquids or gases contact factory Drawing List D 72874 Outline Diagram D 67447 Schematics Diagram D 72759 Schematics Diagram D 62370 Schematics Diagram D 65506 Schematics Diagram C 72761 Schematics Diagram A 30943 Schematics Diagram D 69534 Schematics Diagram A 72757 Schematics Diagram B 59698 Schematics Diagram A 2 s Teledyne Analytical Instruments Infrared Gas Analyzer Appendix Recommended 2 Year Spare Parts List NOTE Part list may or not be part of your system due to the vvide range of applications implicated Qty NY NY NF Note Web P N C 67435B C 72760 C 62371A Head C 62371B C 72863 C 62374A 69535 69535 58206 0205 W76 F1275 A 33748 Description Main CPU PCB Assy Preamp PCB Assy Display PCB Assy Model 7300A 7300 Bulk Mount Display PCB Assy Model 7300A Panel Mount Back Panel PCB Assy Model 7300A Panel Mount Back Panel Assy Model 7300 7300A Bulk Head Mount Temperature Control PCB Assy 115V AC Temperature Control PCB Assy 220V AC Source Lamp Assy O ring Viton Window Fuse THERMISTOR ASSY Orders for replacement parts should include the part number if available and the model and serial number of the instru ment fo
11. Analog outputs for concentration and range identification 0 1 V dc standard and isolated 4 20 mA dc e Superior accuracy 1 4 General The Model 7300A is a non dispersive infrared NDIR analyzer that employs the basic principles of spectroscopic analysis to measure a specific concentration of a gas in a multicomponent gas system The concentration of component of interest is determined by exposing a chamber sample cell filled with a gas mixture to infrared radiant energy and measuring how much of the specific non dispersive infrared wavelength is absorbed by the gas 1 2 Teledyne Analytical Instruments Infrared Gas Analyzer Introduction 1 being measured There is a direct correlation between absorption and the concentration of the component of interest in the liquid mixture 1 5 NDIR Analyzer The Model 7300A contains an optical system consisting of an infrared IR source sample cell and detectors In front of the thermopile detectors are four interference type filters These filters are designated the reference and measuring filters The sample flows continuously through the sample cell absorbing energy at various wavelengths throughout the IR spectrum The wavelengths and intensities of absorption peaks throughout the spectrum are characteristic of the specific compounds that are present in the sample In any photometric analysis there is always the analysis of the compo nent of interest and other components backg
12. Analyzer Operation 4 tivity ofthe binary gas the analyzer would normally be setup so that the 100 oxygen 096 argon concentration would correspond to the zero level 4mA 0 V of the output signal Then 85 oxygen 15 argon would correspond to 20mA 1 V inthesignal output It may be convenient for the user to have the outputs reversed so that the 85 100 oxygen level outputs a4 20mA 0 1 V signal respectively This beaccomplished by reversing the data input to the custom settings Not all applications will require areversing function however if this is desirable This can be programmed by allowing the user to set the analyzer to read reversal output Contact the factory for further information 4 9 1 2 Output Signal Offset TAI has provided the output offset feature in the software for the accuracy purpose In many cases the analyzer does not require this feature Forexmple ifthe analyzer has setup to analyze the sample gas of 40 50 CO innitrogen normally zero gas of this application requires 40 CO in nitrogen However 100 of nitrogen can be used to zero the analyzer In this case the output offset is notneeded to setup For linear output the accuracy will access success fully within 1 off But if the applicationis analyzing the sample gas that is not linearly the accuracy of the analyzer may not meet the specification There fore output offset is required and 40 CO in nitrogen is also needed for zero calibra
13. Cal Contact This relay contact is closed while analyzer is spanning and or zeroing See Remote Calibration Protocol below Teledyne Analytical Instruments 2 7 2 Installation Model 7300 Table 2 6 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 7300A Analyzer the customer s controller must monitor the Cal Relay Contact When the contact is OPEN the analyzer is analyzing the Remote Cal Inputs are being polled and a zero or span command can be sent When the contact is CLOSED the analyzer is already calibrating It will ignore your request to calibrate and it will not remember that request Once a zero or span command is sent and acknowledged contact closes release it If the command is continued until after the zero or span is complete the calibration will repeat and the Cal Relay Contact CRC will close again Forexample 1 Test the CRC When the CRC is open Send a zero command until the CRC closes The CRC will close quickly 2 When the CRC closes remove the zero command 3 When CRC opens again send a span command until the CRC closes The CRC will close quickly 4 When the CRC closes remove the span command When CRC opens again zero and span are done and the sample is being analyzed Note The Remote
14. FOR SWITCHING POWER ON OFF TO THE DISPLAYS AND OUT PUTS ONLY The standard power supply requires a 110 V ac 50 60 Hz power source or 220 V ac 50 60 Hz power optional 2 3 2 Fuse Installation The fuse block at the right of the power cord receptacle accepts US or European size fuses A jumper replaces the fuse in whichever fuse receptacle is not used 2 3 3 50 Pin Equipment Interface Connector Figure 2 1 shows the pin layout of the Equipment Interface connector The arrangement is shown as seen when the viewer faces the rear panel of the analyzer The pin numbers for each input output function are given where each function is described in the paragraphs below lt 17 ol 33 o o o o o o o 218 50 4 Figure 2 1 Equipment Interface Connector Pin Arrangement 2 3 3 1 Analog Outputs There are four DC output signal pins two pins per output For polar ity see Table 3 1 The outputs are 0 1 V dc of Range Voltage riseslinearly with increasing concentration from 0 V at 0 concentration to 1 V at full scale Full scale 10096 of programmable range 0 1 V dc Range ID 0 25 V Range 1 0 5 V Range 2 0 75 V Range 3 1 V Cal Range 2 4 Teledyne Analytical Instruments Infrared Gas Analyzer Installation 2 4 20 mA dc Range Currentrises linearly with concentration from 4 mA at 0 c
15. Instruments Infrared Gas Analyzer Operation 4 Note The ranges must be increasing from lovv to high for example if Range 1 is set to 0 10 and Range 2 is set to 0 100 then Range 3 cannot be set to 0 50 since that makes Range 3 lovver than Range 2 Ranges alarms and spans are always set in either percent or ppm units as selected by the operator even though all concentration data outputs change fromppm to percent when the concentration is above 9999 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 saturates at 1 V dc or 20 mA However the digital readout and the RS 232 output continue to read regardless of the analog output range To end the session send st lt enter gt st lt enter gt to the analyzer from the computer 4 8 2 The Curve Algorithm Screen The Curve Algorithm isa linearization method It provides from 1109 intermediate points between the ZERO and SPAN values which can be normal ized during calibration to ensure a straight line input output transfer function through the analyzer Before setting the alogorithm curve each range must be Zeroed Spanned Eachrange is linearized individually as necessary since eachrange will usually havea totally different linearization requirement To linearize the ranges you must first perform the four steps indicated at th
16. active or defeated HI or LO acting latching or not and failsafe or not RANGE Used to set up three analysis ranges that can be switched automatically with auto ranging or used as individual fixed ranges HARDW VAR This function displays parameters used by the software for some calculations It is a troubleshooting tool to be used by qualified technicians FILTER This function sets the digital filter from 0 to 10 0 being faster response time and 10 being the slowest The default is 4 CAL_OUTPUT Calibrate Analog Output APPLICATIONS Restricted function not generally accessed by the end user Used to define up to three analysis ranges and a calibration range including impurity background low end of range high end of range and of ppm units ALOGORITHM Arestricted function not generally accessed by the end user Used to linearize the output for the range of interest Teledyne Analytical Instruments Infrared Gas Analyzer Operation 4 15 OFFSET This function helps set a non zero offset to the zero calibration Itis useful when zeroing the analyzer with a background gas that is different than the sample 16 CAL INDEPD Not generally accessed buy the end user Forces analyzer to be in independent calibration mode 17 STANDBY Remove power to outputs and displays but maintain power to internal circuitry Any functioncan be selectedat any time Just scroll through the MAIN MENU with the DOWN UP keys to the appropri
17. and other liquids or gases contact factory Other ranges and gases possible with optical cell path optical filter changes consultfactory Teledyne Analytical Instruments 1 1 1 Introduction Model 7300A 1 3 Main Features of the Analyzer The Model 7300A Infrared Gas Analyzer is sophisticated yet simple to use The main features of the analyzer include e A easy to use front panel interface that includes a red 5 digit LED display and a vacuum fluorescent display driven by microprocessor electronics that continuously prompts and informs the operator e Highresolution accurate readings of concentration from low levels to 10096 Large bright meter readout e Versatile analysis over a wide range of applications e Microprocessor based electronics 8 bit CMOS microprocessor with 32 kB RAM and 128 ROM e Three user definable output ranges from 0 2 through 0 100 90 allow best match to users process and equipment Calibration range for convenient zeroing or spanning e Auto Ranging allows analyzer to automatically select the proper preset range for a given measurement Manual override allows the user to lock onto a specific range of interest e Two adjustable concentration alarms and a system failure alarm e Extensive self diagnostic testing at startup and on demand with continuous power supply monitoring e RS 232 serial digital port for use with a computer or other digital communication device e
18. customer wiring is inspected properly by start up personnel 2 2 3 Calibration Gases The system may require a supply of clean oil and particulate free air foruse as Zero gas For accurate calibration the analyzer requires a blended gas mixture typically 80 90 of the full scale range Forexamle 0 1 CO analyzer should use a 0 896 to 0 9 CO in N2 bottled mixture The gas blend should be a working certified standard analyzed by the gas supplier to at least 2 accuracy Do not restrict the bypass sample or reference vents of the analyzer and sample system when provided All lines must vent to astable safe area typically 1 ATM A 0 005 pressure 0 psig 0 07 Be sure to vent the analyzer exit to atmospheric unless otherwise indicated by the system piping schematic Refer tothesystsemoutline piping schematics for proper connections and flow paths of the analysis system 2 2 Teledyne Analytical Instruments Infrared Gas Analyzer Installation 2 2 2 4 Pipe Connections Refer to Appendix Piping Drawings for information about pipe connec tions On special systems consult the text in the manual that describes your particular sample system in detail 2 2 5 Sample Delivery System The sample delivery system should be designed to operate reliably and must be of large enough capacity to avoid flow stops A pumpis required only if there is insufficient pressure to reliably supply the sample to the system equipment pan
19. imminent danger it has no control over process conditions and it can be misused In particular any alarm or control systems installed must be tested and understood both as to how they operate and as to how they can be defeated Any safeguards required such as locks labels or redundancy must be provided by the user or specifically requested of Teledyne at the time the order is placed Therefore the purchaser must be aware of the hazardous process conditions The purchaser is responsible for the training of personnel for providing hazard warning methods and instrumentation per the appropriate standards and for ensuring that hazard warning devices and instrumentation are maintained and operated properly Teledyne Analytical Instruments the manufacturer of this instrument cannot accept responsibility for conditions beyond its knowledge and control No statement expressed or implied by this document or any information disseminated by the manufac turer or its agents is to be construed as a warranty of adequate safety control under the user s process conditions 29 Teledyne Analytical Instruments The following data is recorded by the technitian at the end of the testing of the analyzer APPLICATION IMPURITY OF INTEREST RANGE 1 FROM Infrared Gas Analyzer Technician Record Sheet TO RANGE 2 FROM TO RANGE 3 FROM TO RANGE 4 FROM TO FILTER CALIB FACTOR HARD OFFSET C
20. of the contaminant concentration detected Ifthe concen tration exceeds the upper limit of the range the DC output will saturate at 1 V de 20 mA atthe current output However the digital readout and the RS 232 output of the concentration are unaffected by the fixed range They continue to read beyond the full scale setting until amplifier saturation is reached Below amplifier saturation the over range readings are accurate UNLESS the application uses linearization over the selectedrange To program the ranges you must first perform the four steps indicated at the beginning of section 4 8 Programming Y ou will then be in the MAIN MENU and selecting application function screen Sel rng to set appl gt Bl 02 83 CAL lt Use the UP DOWN key to increment decrement the range number to 01 02 03 or CAL and Enter Imp C02 FR 0 70 10 Use the UP DOWN Rey to increment the respective parameters as de sired Use the ENTER to move from Imp impurity to ppm or to FR from lowerend ofranges and TO to upper end ranges Last Enter will acceptthe values and the screen will display OFFST INVRT SENTO Standard lt 5 gt ESC if your application is standard If your application requires OFFSET or Reversal output ENTER will set your output as OFFSET or REVERSAL See special function setup section 4 9 for more information See note below Repeat for each range you want to set 4 28 Teledyne Analytical
21. preset voltage or current when using the current outputs to represent a particular range Table 2 4 gives the range ID output for each analysis range Table 2 4 Analog Range ID Output Example Range Voltage V Current mA Application Range 1 0 25 8 90 100 CO N Range 2 0 50 12 95 100 CO N Range 3 0 75 16 0 100 CO N Range 4 Cal 1 00 20 98 100 COJN 2 3 3 2 Alarm Relays The nine alarm circuit connector pins connect to the internal alarm relay contacts Each set of three pins provides one set of Form C relay contacts Each relay has both normally open and normally closed contact connections The contact connections are shown in Table 2 4 They are capable of switching up to 3 amperes at 250 V ac into a resistive load The connectors are Threshold Alarm 1 Can be configured as high actuates when concen tration is above threshold or low actuates when concentration is below threshold e Can be configured as failsafe or nonfailsafe e Can be configured as latching or nonlatching e Can be configured out defeated Threshold Alarm2 Can be configured as high actuates when concen tration is above threshold or low actuates when concentration is below threshold e Can be configured as failsafe or nonfailsafe e Can be configured as latching or nonlatching be configured out defeated 2 6 v Teledyne Analytical Instruments Infrared Gas Analyzer Installation 2 System Alarm Actuates
22. start time value then ENTER To turn ON the SPAN and or ZERO cycles to activate AUTO CAL useUP or DOWN keys to set the OF F ON field to ON You can now turn these fields ON because there is anonzero span time defined 4 6 Teledyne Analytical Instruments Infrared Gas Analyzer Operation 4 4 3 3 Password Protection Beforeaunique password is assigned the system assigns TAI by default This password will be displayed automatically The operator just presses the Enter key to be allowed total access to the instrument s features Ifa password is assigned then setting the following system parameters can be done only after the password is entered alarm setpoints AUTO CAL setup ZERO SPAN calibration assigning anew password range application selections and curve algorithm linearization APPLICATION and ALGO RITHM are covered in the programming section However the instrument can still be used for analysis or for initiating a self test without entering the password To defeat security the password must be changed back to TAI NOTE If you use password security it is advisable to keep a copy of the password in a separate safe location 4 3 3 1 Enteringthe Password To install anew password or change a previously installed password you must key in and ENT ERthe old password first If the default password is in effect pressing the ENTER button will enter the default TAI password for you Callout MAIN MENU setup by se
23. the energy at the measuring wavelength changes changing only the measuring voltage output The reference voltage output is not affected by the gas concentration changes This measurement voltage change is electroni cally processed as the instrument s output signal Source Sample in Thermopile Detector E s Filament Filters i Blocking Sample out Filter Windows IR Bench Block Diagram Teledyne Analytical Instruments 3 5 3 Start up Theory of Operation Model 7300 3 5 Digital Signal Processing amp Electronics The Model 7300A uses an 8031 microcontroller Central Processing Unit CPU vvith 32 RB of RAM and 128 RB of ROM to control all signal processing input output and display functions for the analyzer System power is supplied from a universal power supply module designed C65507 to be compatible with any international power source See Major Internal Components in chapter Maintenance for the location of the power supply and the main electronic PC boards The Temperature Control board C69535A is set to a single voltage 110 or 220 VAC and set the temperature of the sampling system at 45 C The signal processing electronics including the microprocessor analog to digital and digital to analog converters are located on the Motherboard C67435B on side of the case The detector output level depends on the intensit
24. the instrumentis on at the moment It should be between 10 000 to 10 000 Teledyne Analytical Instruments 4 11 4 7300 Hard offset 3015 This is the raw DAC count of the Coarse zero adjustment It should read between 0 and 4095 offset F 22715 Thisistheraw DAC count of the Fine zero adjustment It should read between 0 and 4095 Current gain 4 Thisisthegaintheanalyzerison itshould read between 0 and 9 4 3 9 Digital Filter Setup The 7300A analyzerhas the option of decreasing orincreasing the amountoffiltering on the signal This feature enhances the basic filtering done by theanalog circuits by setting the amount of digital filtering effected by the micro processor To access the digital filter setup scroll through the menu and select FILTER Press the Enter key to seethe following screen Enter Digital Filter 4 Thenumberonthe second row can be adjusted from 0 minimum digital filtering to 10 maximum digital filtering The default setting is 4 and that should suffice for most applications In some applications where speeding the response time with some trade off in noise is of value the operator could decrease the number of the digital filter In applications where the signal is noisy the operator could switch to a higher number the response time is slowed down though 10 to 90 response time on the different settings to a step input 1s shown below This response time d
25. to change the parameter Once the parameters for alarm have been set Enter the alarm function again and repeat this procedure for next alarm e Toreset a latched alarm go to Dft and then use either UP two times or DOWN two times Toggle it to Y and then back to N OR Go to Ltch and then use either UP two times or DOWN two times Toggle it to N and back to Y 4 6 The Hange Select Function The Hangefunctionallows you to manually select the concentration range ofanalysis MANUAL orto select automatic range switching AUTO In the MANUAL screen you are further allowed to define the high andlow concentration limits of each Range and selecta single fixed range to run CAUTION If this is a linearized application the new range must be within the limits previously programmed using the System function if linearization is to apply through out the range Furthermore if the limits are too small a part approx 10 or less of the originally linear ized range the linearization will be compromised In the AUTO screen you are further allowed to select which gas application PREVIOUSLY defined in APPLICATION function torun 4 6 1 Manual Select Define Range Screen The Manual range switching mode allows you to select a single fixed analysis range Itthen allows you to redefine the upper and lower limits for the range Use UP DOWN key tostartthe RANGE function and ENTER Select range mode MANUAL Tel
26. value displayed on the screenis sufficiently stable press Enter Generally when the Span reading changes by 1 or less of the range being calibrated fora period of ten minutes it is sufficiently stable Once Enter 4 20 Teledyne Analytical Instruments Infrared Gas Analyzer Operation 4 is pressed the Span reading changes to the correct value The instrumentthen automatically enters the Analyzefunction 4 5 The Alarms Function The Model 7300A is equipped with 6 fully adjustable set points concentra tion with two alarms and a system failure alarm relay Each alarm relay has a set of form C contacts rated for 3 amperes resistive load at 250 V ac See Figure in Chapter3 Installation and orthe Interconnection Diagram includedat the back of this manual for relay terminal connections The system failure alarm has a fixed configuration described in chapter 3 Installation Theconcentration alarms can be configured from the front panel as either high or low alarms by the operator The alarm modes can be set as latching or non latching and either fail safe or non fail safe or they can be defeated altogether The setpoints forthe alarms are also established using this function Decidehow youralarms should be configured The choice will depend upon your process Consider the following four points 1 Which if any of the alarms are to be high alarms and which if any are to be low alarms Setting an alarm as HIGH triggers the al
27. 2 Zero adj 2048 C Zero The analyzer goes through C Zero F Zero and S Zero During C Zero and F Zero use the UP DOWN keys to adjust displayed Zero adj value as close as possible to zero Then press Enter S Zero starts During S Zero the Microcontroller takes control as in Auto Mode Zeroing above Itcalculates the differences between successive sam plings and displays the rate of change as Slope a value in parts per million per second ppm s JHHHF dH CO S1 ope HH 5 7 Generally you have a good zero when Slopeis less than 0 05 ppm s for about 30 seconds Once zero settling completes the information is stored in the analyzer s memory and the instrument automatically returns to the Analyzemode 4 4 1 3 Cell Failure Cell failure in the 7300A is usually associated with inability to zero the instrument with areasonable voltage differential across the Wheatstone bridge If this should ever happen the 7300A system alarm trips and the VFD displays a failure message Cell cannot be balanced Check your zero gas Before replacing the sensor a Check your zero gas to make sure it is within specifications 4 18 29 Teledyne Analytical Instruments Infrared Gas Analyzer Operation 4 b Check for leaks downstream from the sensor where contamina tion may be leaking into the system c Check flowmeter to ensure that the flow is no more than 200SCCM d Checktemperature controller board
28. 3 else the lovvest range is range 1 2 Connectspan gas to span inlet 3 UseUP DOWN key to scroll tothe CAL INDEPD function 4 Hold Escape Entercontrol to ENTER position for approximately 10 secondsuntil the upperright connect display ok message 5 Use UP DOWN scroll to select SPAN function then setup the setting to span level Press ENTER key to span NOTE You must do step 5 before the analyzer return to analyze mode If the analyzer returns to analyze function you must repeat step 3 5 again 6 Setrange to nex range 7 Repeat steps 3 5 until you reach the last range of the row 4 34 Teledyne Analytical Instruments Infrared Gas Analyzer Maintenance 5 5 0 Maintenance Aside from normal cleaning and checking for leaks at the gas tions routine maintenance is limited to replacing filter elements and fuses and recalibration WARNING SEE WARNINGS ON THE TITLE PAGE OF THIS MANUAL 5 0 Replacing the Fuse Remove Power to Unit before replacing the fuse 1 Place small screwdriver in notch and pry cover off as shown in Figure 5 1 Fuse Block Housing Notch Figure 5 1 Removing Fuse Block from Housing 2 Tochange between American and European fuses remove the single retaining screw flip Fuse Block over 180 degrees and replace screw 3 Replace fuse as shown in Figure 5 2 Teledyne Analytical Instruments 5 1 5 Maintenance Model 7300 4 Reas
29. Analyzer Measurement Cell The Infrared Analyzer contains an auto zero circuit vvhich automatically zeroes the analyzer This zeroing compensates for dirt in the sample cell and under normal circumstances will compensate for very large amounts of contamination in the cell If there is a need for removing the cell and cleaning it follow this procedure A Turn off power to the analyzer and open the optical bench housing Disconnect the cell heater wires if present B Remove the cell assembly from the optical bench Non sealed cells can be swabbed with water and alcohol and dried thoroughly before reassembly Sealed cells can be blown out with air washed or replaced C After the cells have been cleaned and thoroughly dried reassemble them into the optical bench Also attach any disconnected wiring back onto the bench and check all connections and fasteners D Turn on the analyzer and allow it to warmAup for at least ten minutes Check for zero and span gas response NOTE Typically sample cell should only be removed for cleaning when the Auto Zero circuit can no longer com ensate for offset or if there is a loss of sensitivity caused by cell Inefficiency 5 4 System Self Diagnostic Test 1 Pressthe System button to enter the system mode 2 Usethe lt gt arrow keys to move to More and press Enter 3 Usethe arrow keys to move to Self Test and press Enter The following failure codes apply Teledyne Analytic
30. HARD OFFSET F SOFTWARE VERSION SERIAL 1 PPM circle one 1 PPM circle one 1 PPM circle one 1 PPM circle one 29 Teledyne Analytical Instruments Model 7300A iv 49 Teledyne Analytical Instruments OPERATING INSTRUCTIONS Model 7300A Infrared Gas Analyzer Table of Contents General Purpose Teledyne Analytical Instruments Model 7300A Infrared Gas Analyzer 1 Table of Contents Introduction OVOLVIOMI Gea AER Main Features of the Analyzer en es baled NDIR Analyzer Installation 2 1 2 2 Unpacking the Installing amp Connecting the Analyzer 2 2 1 Connections 2 2 2 Electrical Power Connections 2 2 3 Calibration Gases 2 2 4 Pipe Connection 2 2 5 Sample Delivery System 2 2 6 Venting the System 2 3 Electrical Connections rear Panel 2 3 3 2 Alarm Relays 2 4 Gas Requirements 2 5 Testing the System 2 6 Calibration 2 3 1 Primary Input Power 2 3 2 Fuse Installation
31. Maintenance Model 7300 Meter reads Negative with zero gas flowing through analyzer D Meter Up Scale or Overscale E Insufficient Span Control with span gas F Noisy or Erratic Operation a ZERO control may be misadjusted Adjust control to bring indication up to zero refer to Section 4 b If zero indication unattainable with ZERO control centered monitor TP6 on preamp board c Check that infrared source is operating If no light check source elementresistance and connections a Redo full calibarion b Check for obstruction in sample beam path c Check for excessive moisture in plumbing and sample chamber Clean and replace sample chamber a Recheck zero for excessive off set b Check modulation factor using certified span gas most eommon sources of noises are a Reduced output of infrared source 5v 110 ma each or replace as necessary 5 8 29 Teledyne Analytical Instruments Infrared Gas Analyzer Maintenance 5 b Chopper hitting housing c Noisy detector d AC pickup at printed circuit board e Optical unit not grounded to cabinet f Detector connections loose g Faulty preamplifier board h Contamination in cell Teledyne Analytical Instruments 5 Maintenance Model 7300A 5 10 Teledyne Analytical Instruments Infrared Gas Analyzer Appendix Appendix A 1 Specifications 7300A Digital Control
32. Portion Ranges Display Signal Output Alarm Mounting Operating Temperature Sample Temperature Accuracy Linearity Repeatability Drift Response Time Span Stability Noise Classification se Teledyne Analytical Instruments Three Programmable Ranges field selectable within limits application dependent and Auto Ranging 2 line by 20 alphanumeric VFD accompanied by 5 digit LED display 4 20mADC iso or 0 1 VDC negative ground Dual Alarm Relay General Purpose 5 45 C 41 113 P 5 45 C 41 1139 2 of full scale at constant temperature 2 of full scale 1 of full scale 1 of full scale per week at constant tem perature 90 of full scale in less than 5 seconds Less than 1 of full scale change per month 1 of full scale 7300 Explosion proof suitable for Class I Div 1 Groups B amp D 7310 General purpose Model 7300 7300 Specifications Chemical petrochemical processes e Combustion and flue gas processes e Pulp and paper e Vapor recovery systems Enhanced oil recovery Food agriculture medical Metals ceramics and heat treating atmospheres Landfill gas power stations Emissions testing part of the mobile stations Carbon dioxide scrubber efficiency CO CO2 C2H4 monitoring oxyhydrochlorination process in EDC manufacturing Gas Analysis CO2 0 2 to 0 100 CO 0 10 to 0 100 CH4 0 10 to
33. Probe connector provides signals to operate the zero and span gas valves synchronously However if you have the Internal valve option which includes zero and span gas inputs the 7300A automatically regulates the zero span and sample gas flow 2 8 Teledyne Analytical Instruments Infrared Gas Analyzer Installation 2 2 3 3 4 Range ID Relays Four dedicated Range ID relay contacts For any single application they are assigned to relays in ascending 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 2 7 lists the pin connections Table 2 7 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 Contact 18 Range 3 ID Contact 34 Range 4 ID Contact 35 Range 4 ID Contact 2 3 3 5 Network I O A serial digital input output for local network protocol At this printing this port is not yet functional It is to be used in future options to the instru ment Pins 13 and 29 2 3 3 6 Remote Valve Connector The 7300 15 a single chassis instrument which has no Remote Probe Unit Instead the Remote Valve connector is used as another method for controlling external sample zero span gas valves See Figure 2 5 SAMPLE hot F Soleno
34. Slope starts within the acceptable zero range and does notneed to settle further The system first does acourse zero shown in the lowerright corner of the screen as C Zero for approximate 3 min and then does a fine zero and displays F Zero for approximate 3 min Then and whenever Slope is less than 0 01 for at least 3 min instead of Slope you will see a countdown 9 Left 8 Left and so fourth These are software steps in the zeroing process that the system must complete AFTER settling before it can go back to Analyze Software zero is indicated by S Zero in the lowerrightcorner C02 4 Left dHHF S Zero The zeroing process will automatically conclude when the outputis within theacceptable range fora good zero Then the analyzer automatically returns to the Analyze mode Teledyne Analytical Instruments 4 17 4 7300 4 4 1 2 Manual Mode Zeroing Scroll to Zero and enter the Zerofunction The screen that appears allows youto select between automatic or manual zero calibration Usethe UPIDOWN keystotoggle between AUTO and MANzero settling Stop when MANUAL appears blinking on the display Select zero mode MANUAL Enterto begin the zero calibration After a few seconds the first of three zeroing screens appears The number in the upper left hand corner is the first stage zero offset The microprocessor samples the output at a predetermined rate THHHE c0
35. al Instruments 5 3 5 Maintenance Model 7300 Table 5 1 Self Test Failure Codes Power 0 OK 1 5 V Failure 2 15 V Failures 3 Both Failed Analog 0 OK 1 DAC A 0 1 Concentration 2 DAC 0 1 V Range ID 3 Both Failed Preamp 0 OR gt 0 Amplifier failure high offset number is a code that pinpoint which gains are at fault Detector 0 OK 1 Failed open filament short to ground power 2 Unbalance deterioration of filaments blocked tube 5 5 Major Internal Components All internal components are accessed by unbolting and pulling open the rack assembly removing the front cover as described earlier The major internal component locations are shown in Figure 5 3 the cell block is illustrated in Figures 5 2 5 3 and the fuse receptacle is shown in Figure 5 1 The 7300 contains the following major internal components e Customer Interface PCB Power Supply on bottom surface e Preamp PCB Contains Microprocessor Front Panel PCB Contains Displays 5 digit LED meter 2 line 20 character alphanumeric VFD display See the drawings in the Drawings section in back of this manual for details 5 4 Teledyne Analytical Instruments Infrared Gas Analyzer Maintenance 5 Figure 5 8 Cell Assembly VVARNING HAZARDOUS VOLTAGES EXIST ON CERTAIN COMPONENTS INTERNALLY VVHICH MAY PER SIST FOR A TIME EVEN AFTER THE POVVER IS TURNED OFF AND DISCONNECTED Figure 5 4 Major Internal Comp
36. anges for automatic range switching However there are some pitfalls that are to be avoided Ranges that work well together e Ranges that have the same lower limits but upper limits that differ by approximately an order of magnitude e Ranges whose upper limits coincide with the lower limits of the next higher range Ranges where there is a gap between the upper limit of the range and the lower limit of the next higher range Range schemes that are to be avoided include Teledyne Analytical Instruments 4 25 4 7300 e Ranges that overlap Ranges whose limits are entirely within the span of an adjoining range Figure 4 2 illustrates these schemes graphically Rand Permissable Em Not Permissable Range a EN ERE Figure 4 2 Examples of Autoranging Schemes 4 7 The Analyze Function Normally all ofthe functions automatically switch back to the Analyze function when they have completed theirassigned operations Pressing the Escapebutton in many cases also switches the analyzer back to the Analyze function Alternatively if youleave youranalyzeron MAIN MENU screen within 5 seconds withouttouching any key it will automaticaly return to analyze function Iftheanalyzerisin subfunction mode in most cases it will automaticaly return to analyze mode within 10 minutes The Analyzefunction screen shows the impurity concentration and the applicat
37. arm when the contaminant concentration rises above the setpoint Setting an alarm as LOW triggers the alarm when the contaminant concentration falls below the setpoint Decide whether you want the alarms to be set as e Both high high and high high alarms or e One high and one low alarm or Both low low and low low alarms 2 Areeither or both of the alarms to be configured as failsafe In failsafe mode the alarm relay de energizes in an alarm condition For non failsafe operation the relay is energized in an alarm condition You can set either or both of the concentration alarms to operate in failsafe or non failsafe mode 3 Areeither of the alarms to be latching In latching mode once the alarm or alarms trigger they will remain in the alarm mode even if process conditions revert back to non alarm conditions This mode requires an alarm to be recognized before it can be reset In the non latching mode the Teledyne Analytical Instruments 4 21 4 7300 alarm status will terminate when process conditions revert to non alarm conditions 4 Are either of the alarms to be defeated The 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 If you are using password protection you will need to enter
38. ate function and ENTER it Theanalyzer will immediately startthat function unless password restrictions havebeenassigned Passwordassignmentis explained further on Allofthese functions are described in greater detail in the procedures starting in section 4 3 The VFD screen texts used to illustrate the procedures are reproduced in a Monospaced type style 4 2 2 Data Entry 4 2 2 1 ENTER Whenthe selected optionis afunction onthe Main Menu screen the function name appears between the arrows on the screen You activate the function by the ENTER key Whenthe selected optionis a function or subfunction ENTER moves the display to the V FD screen for that function or subfunction VVhen the selected option is a modifiable item theUP or DOWN keys can be used to increment or decrement that modifiable item to the value or action you want Then you ENTER the item which also puts you into the next field to continue programming When the last field is entered ENTER takes you to the next screen in the process or if the process is completed ENTER takes you back to the ANA LY ZEscreen 4 2 2 2 ESCAPE Pressing the ESCAPE Rey takes you back to the previous screen Teledyne Analytical Instruments 4 5 4 7300 If you do not wish to continue a function you can abort the session by escaping Escaping a function takes the analyzer back to the previous screen or tothe ANALYZE Function depending on the f
39. ble 4 00 madc Press the enter to continue to the 20 madc adjust ment Adjst output to 20ma SENT to OK 5 Again Use the Up or Down Rey to adjust this number until the ammeter reads as close as possible 20 0 madc Press the Enter key to continue to the NAMUR option NAMUR NE43 output lt ENT gt to OK NO The default setting is NO That means the 4 to 20 madc and 0 1 vdc are linear and show no discontinuities throughoutits range of operation approxi mately from 2 4 madc to 21 6 madc If you switch it to YES by using Up or Down keys the output of the 4 to 20 madc will conform to NAMUR standard NE43 If selected the output of the 2 to 20 madc will exhibit a breakdown at readings below 3 8 madc and above 20 5 madc approximately These break downs indicate a failure on the analyzer Please refer to the NAMUR NE43 standard for detailed information All the settings of this function are stored and are remembered after power loss Ifinstrumentis cold started returned to factory settings the settings will be returned to 0 and non NAMUR NE43 compliant NOTE Analog 0 1 vdc output does not get calibrated when 4 to 20 madc is adjusted due to errors introduced by its own electronics Teledyne Analytical Instruments 4 15 4 7300 4 4 Zero and 5 Functions 1 Model 7300A can have as many as three analysis ranges plus special calibration range Cal Range and the analysi
40. e analyzer system must be installed on a level surface with sufficient space allocated on either side for personnel and test equipment access Subject to the foregoing the Analyzer System should be Teledyne Analytical Instruments 2 1 2 Installation Model 7300 placed as close to the sample point as possible and bolted to its supporting surface Wheninstalled as a system with enclosure non panel or rack mounted a waterproof mastic should be liberally applied to the under surfaces of all supporting legs ofthe cubicle system before placing itin position and bolting it in place 2 2 1 User Connections Alluserconnections are on the back of the equipment panel and appear in the outline diagram in the back of the manual or addendum to the manual 2 2 2 Electrical Power Connections The standard power requires a supply of 100 125V AC single phase power Power connections are made at the rear panel of the unit Refer to the input output diagram for more information The electrical powerservice must include a high quality ground wire A high quality ground wire is a wire that has zero potential difference when measured to the power line neutral If you have the B option you will require 220 or 240 VAC 50 60 Hz power Check the analyzer input output diagram power schematic outline and wiring dia grams for incoming power specifications and connecting points Warning Primary power to the system should not be supplied until all
41. e beginning of section 4 8 Programming You will then be in the MAIN MENU and select ALOGORITHM 4 8 2 1 Checking the linearization From the MAIN MENU screen select ALGORITHM and Enter Sel rng set algo gt 01 02 03 lt Use the UP DOWN key to select the range 01 02 or 03 Then press Enter Gas use C02 Range 10 Enter again Teledyne Analytical Instruments 4 29 4 7300 Algorithm setup VERIFY SETUP UP DOWN to select and EnterVERIFY to check vvhether the linearization has been accomplished satisfactorily Dpt INPUT OUTPUT 0 0 00 0 00 The leftmost digit under Dpt is the number of the data point being moni tored Use the UP DOWN keys to select the successive points The INPUT value is the input to the linearizer It is the simulated output of the analyzer You do not need to actually flow gas The OUTPUT value is the output of the linearizer It should be the ACTU AL concentration of the span gas being simulated Ifthe OUTPUT value shownis notcorrect the linearization must be correct ed ESCAPE to return to the previous screen Select and Enter SET UP to Calibration Mode screen Select algorithm mode AUTO There are two ways to linearize AUTO and MANUAL The auto mode requires as many calibration gases as there will be correction points along the curve The user decides on the number of points based on the precision re quired The manual mode only re
42. edyne Analytical Instruments 4 23 4 7300 Note If all three ranges are currently defined for different applica tion gases then the above screen does not display because mode must be manual Instead the VFD goes directly to the following screen If above screen displays use the UP DOWN arrow keys to Select MANU AL and press Enter Select range to run gt 01 02 03 CAL Use the UPIDOWN keys to select the range 01 02 03 or CAL Then press Enter Gas use C02 Range g 10 Usethe ENTER key to move therange to low end field Use ENTER key to move the range to high end field Use the UP DOWN keys tochange the values of the fields Press Escapeto return to the previous screen to select or define another range Press Enterto return the to the Analyze function 4 6 2 Auto Screen Autoranging will automatically set to the application that has at least two range setup with the same gases In the autoranging mode the microprocessor automatically responds to concentration changes by switching ranges for optimum readout sensitivity If the upper limit of the operating range is reached the instrument automatically shifts to the next higher range If the concentration falls to below 85 of full scale of the next lower range the instrument switches to the lower range A correspond ing shift DC concentration output and in the range ID outputs will be noticed The autoranging fea
43. el Do not complicate the delivery system by adding a pump unless it is absolutely necessary If a pump is required select a type that can handle the sample corrosion as well as meet the area classification and Environmental conditions 2 2 6 Venting the System In gas analysis systems the system vent manifold or bypass sample vents must terminate in a safe area as the sample may be poisonous corrosive or flammable 2 3 Electrical Connections Rear Panel Figure 3 3 shows the Model 7300A rear panel There are connectors for power digital communications and both digital and analog concentration output For safe connections no uninsulated wiring should be able to come in contact with fingers tools or clothing during normal operation CAUTION Use Shielded Cables Also use plugs that provide excellent EMI RFI protection The plug case must be connected to the cable shield and it must be tightly fastened to the analyzer with its fastening screws Ultimately it is the installer who ensures that the connections provide adequate EMI RFI shielding Teledyne Analytical Instruments 2 3 2 Installation 7300 2 3 1 Primary Input Power The power cord receptacle and fuse block are located in the same assembly Insert the power cord into the power cord receptacle DANGER POWER IS APPLIED TO THE INSTRUMENT S CIR CUITRY AS LONG AS THE INSTRUMENT IS CON NECTED TO THE POWER SOURCE THE STANDBY ON THE FRONT PANEL IS
44. eld Use the UP DOVVN Rey to setthe OUTPUT value the lowest concentration into the first point ENTER to accept the first setting Aftereach pointis entered the data point number increments to the next point Moving from the lowest to the highest concentration use the UP DOWN keys to set the proper values at each point Dpt INPUT OUTPUT 0 0 00 0 00 Repeat the above procedure for each of the data points you are setting up tonine points 0 8 Setthe points inunitincrements Do not skip numbers The linearizer will automatically adjust for the number of points entered When you are done ESCAPE The message Completed Wait for calcula tion appears briefly and then the main Systemscreen returns To end the session send st lt enter gt st lt enter gt to the analyzer from the computer 4 8 2 3 Auto Mode Linearization To linearize in the Auto Mode you must have on hand a separate calibra tion gas for each of the data points you are going use in your linearization First the analyzer is zeroed and spanned as usual Then each special calibration gas for each of the intermediate calibration points is flowed in turn through the sensor As each gas flows the differential value for that intermediate calibration point is entered from the front panel of the analyzer Teledyne Analytical Instruments 4 31 4 7300 Note span gas use to span the analyzer must be gt 90 of the range be
45. event severe damage caused by wiring errors Also verify that all connections to the system have been made correctly Refer to the system outline diagram for proper connections 3 2 NDIR Analyzer Startup Before power is supplied to the analyzer TAI recommends the follow ing operator s check be performed Check for loose or damaged components Verify that all plug in circuit cards are firmly seated in their receptacles 3 Inspect and verify that all wiring connections are in agreement with the system Interconnection diagram 4 Check for correct span gases See 4 2 Preparation for Calibra tion 5 Check that sample pressure is regulated to 5 of nominal operating pressure 6 Check and assure sample remains above dewpoint to eliminate any condensation from sample tap to return point ps Power up the unit by depressing the rear panel switch From a first time power on warm start attempt allow 1 one hour warm up to proceed Observe that the Digital display will go through a diagnostic routine before the readings revert to a continuous concentration readout 3 2 1 Initial Set up and Zeroing Assure the sample will enter from the zero inlet gas position Open the zero gas tank and set the pressure regulator to 20 psig Set the zero gas flow 29 Teledyne Analytical Instruments 3 1 3 Start up Theory of Operation Model 7300 and sample flow between 0 1 to 0 6 SCFH 50 250 cc min Zero standard gas mus
46. hange the password the password assignment screen appears Select new password Or Select new password AAA Enterthe password using theUP or DOWN keys and ENTER to scroll through the existing password letters and the UP or DOWN keys to change the letters to the new password The full set of94 characters available forpassword useareshowninthetable below Characters Available for Password Definition D F G H I J K L M N 0 0 5 U W X Y Z 1 7 a b C d e f g h i j k 1 m n 0 4 5 t u V w X y 2 gt T 8 lt 3 0 1 2 3 4 5 7 8 9 lt gt 4 8 Teledyne Analytical Instruments Infrared Gas Analyzer Operation 4 When you have finished typing the new password press Enter A verifica tion screen appears The screen will prompt you to retype your password for verification Enter PWD To Verify Use the UP DOWN key to retype your password and use ENTER to scroll through the letters and last enter will complete verification Y our password will be stored in the microprocessor and the system will immediately switch to the Analyze screen and you now have access to all instrument functions If all alarms are defeated the Analyze screen appears as 1 95 C02 nR1 0 10 Anlz Ifan alarm is tripped the second line will change to show which alarm itis 1 95 C02 AL I you log off the system using the LOGOUT functio
47. he 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 3 6 49 Teledyne Analytical Instruments Infrared Gas Analyzer Start up and Operation The CPU also provides appropriate control signals to the Displays Alarms and External Valve Controls and accepts digital inputs for external Remote Zero and Remote Span commands It monitors the power supply through an analog to digital converter as part of the data for the system failure alarm it performs timing and linearizing tasks too The RS 232 port provides two way serial digital communications to and from the CPU These and all of the above electrical interface signals are described in detail in chapter 3 Installation 3 6 Linearizer The output of the NDIR analyzer bench is non linear this is due to the effect known as Beers Law Figure I shows this non linear response NDIR Bench Output Gas Concentration In order to produce a a compensation curve is required see Figure I unearizer software routine is included to create a linear response Keter to section 4 3 7 and 4 8 2 to see how linearizeris programmed 29 Teledyne Analytical Instruments 3 7 3 Start up Theory of Operation Model 7300 El Figure Il 5 O N ES Linearizer Inp
48. ication It mustbe done through the RS 232 portusing a computer running a terminal emulation program Note It is important to distinguish between this System program ming subfunction and the Range button function which is an operator control The Set Range Screen of the Application function allows the user to DEFINE the upper and lower limits of a range AND the application of the range The Range func tion only allows the user to select or define the limits or to select the application but not to define the application Normally the Model 73004 is factory set to default to manual range selection unless itis ordered as a single application multiple range unit in which case it defaults to autoranging In either case autoranging or manual range selection can be programmed by the user Teledyne Analytical Instruments 4 27 4 7300 In the autoranging mode the microprocessor automatically responds to concentration changes by switching ranges for optimum readout sensitivity If the upper limit of the operating range is reached the instrument automatically shifts to the next higher range Ifthe concentration falls to below 85 of full scale of the next lowerrange the instrument switches to the lower range A correspond ing shift in the DC concentration output and in the range ID outputs will be noticed The autoranging feature can be overridden so that analog output stays ona fixed range regardless
49. id 2 hot ZERO hot m Solenoid 3 hot SPAN I I Matching Solenoid 1 hot EEXHAUSTIHOUL Solenoid 4 hot SAMPLE retum If Solenoid 2 return ZERO retum Necessary Solenoid 3 return SPAN retum Solenoid 1 return LEXHAUST retum Solenoid 4 return Figure 2 5 Remote Probe Connector Pinouts Teledyne Analytical Instruments 2 9 2 Installation Model 7300 The voltage from these outputs is nominally 0 V for the OFF and 15 V dc for the ON conditions The maximum combined current that can be pulled from these output lines is 100 mA If two lines are ON at the same time each must be limited to 50 mA etc If more current and or a different voltage is required use a relay power amplifier or other matching 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 2 8 LOAD Figure 3 6 FET Series Resistance 2 3 4 RS 232Port The digital signal output is a standard RS 232 serial communications port used to connect the analyzer to a computer terminal or other digital device It requires a standard 9 pin D connector Output The data output is status information in digital form updated every two seconds Status is reported in the following order
50. ig Switch the mode switch to sample Refer to Section 4 again Induce an automatic zero cycle as described in Section 4 also After the zero cycle the analyzer reverts to the sample cycle The sample reading is now accurate and the analyzer is placed in continuous operation See Sections 4 6 4 8 NOTE In case slave analyzers are involved calibrate them simultaneously with the master analyzer After the instrument is calibrated when no Auto Cal option was selected shut off the main valve on the span and zero gas tanks These tanks 3 2 Teledyne Analytical Instruments Infrared Gas Analyzer Start up and Operation are not used during automatic sampling 3 3 Theory of operation 3 3 4 General The non dispersive infrared NDIR analyzer is one of the major components of the system It employs the basic principles of spectroscopic analysis to measure a specific concentration of one gas in a multicomponent gas system The concentration of a gas is determined by exposing a chamber filled with a gas mixture to infrared radiant energy and measuring how much of the specific non dispersive infrared wavelength is absorbed by the gas being measured As an example the NDIR analyzer is used most in flue gas applications where the amount of carbon monoxide in a flue gas mixture is measured The specific infrared wavelength at which the carbon monoxide molecule absorbs infrared energy is at 4 65 microns The more carbon monoxide presen
51. in which defects become apparent within one year from the date of shipment except in cases where quotations or acknowledgements provide for a shorter period Components manufactured by others bear the warranty of their manufacturer This warranty does not cover defects caused by wear accident misuse neglect or repairs other than those performed by Teledyne or an autho rized service center We assume no liability for direct or indirect damages of any kind and the purchaser by the acceptance of the equipment will assume all liability for any damage which may result from its use or misuse We reserve the right to employ any suitable material in the manufacture of our apparatus and to make any alterations in the dimensions shape or weight of any parts in so far as such alterations do not adversely affect our warranty Important Notice 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 instrument or its interface with the process being measured be properly trained in the process itself as well as all instrumen tation related to it The safety of personnel is ultimately the responsibility of those who control process conditions While this instrument may be able to provide early warning of
52. ing tea Crete nnn A Appendix Model 7300A SpecIfICatlOris Recommended 2 Year Spare Parts List Drawing cR PA AT REI Exceptions Gas Teledyne Analytical Instruments Infrared Gas Analyzer Introduction 1 1 0 Introduction 1 1 Overview The Teledyne Analytical Instruments Model 7300A Analyzer is a versatile microprocessor based instrument The manual covers the Model 7300A General Purpose 19 Panel Rack mounted analyzer Consisting of an Analysis section and Control Unit section The 7300A Analyzer is for indoor or protected use in General Purpose environments only 1 2 Typical Gas Applications Chemical and petrochemical processes Gas Analysis Combustion and flue gas processes CO2 0 2 to 0 100 Pulp and paper CO 0 10 to 0 100 Vapor recovery systems CHA 0 10 to 0 100 Enhanced oil recovery C2 to C5 0 5 to 0 100 Food agriculture medical Liquid Analysis Metals ceramics and heat treating atmospheres Aromatics 0 596 up to 0 100 Landfill gas power stations MTBE ETBE TAME 0 20 e Emissions testing part of the mobile stations Methanol Ethanol 0 15 e Carbon dioxide scrubber efficiency Isobutanes 0 75 e CO CO2 C2H4 monitoring oxyhydrochlorination Benzene 0 5 process in EDC manufacturing Water in solvents 0 5 For lower ranges
53. ing analyzed Before starting linearization performa standard calibration See section 4 4 To enter data From the MAIN MENU screen 1 Use UP DOWN to select ALGORITHM and Enter 2 Select and Enter SETUP 3 Enter AUTO from the Calibration Mode Select screen The Auto Linearize Mode data entry screen appears 1 95 C0 Input 2 00 5 Use the UP DOWN keys to set the proper value of calibration gas and Enter Repeat this step for each cal point number as it appears in the Input x parentheses 6 Repeat step 5 for each of the special calibration gases from the lowest to the highest concentrations Escape when done Toend the session send st lt enter gt st lt enter gt to the analyzer from the computer 4 9 Special Function Setup CAUTION The programming functions of the output signal reversal polarity reversal and gain preset are config ured at the factory to the users application specifica tion These functions should only be reprogrammed by trained qualified personnel 4 9 1 OFFSET OUTPUT Reversal Output 4 9 1 1 Output Signal Reversal Some applications require a reversal of the output signals in order for the 4 20mA and0 1 V DC output signals to correspond with the low and high end of the concentration range For example if an application involves the analysis of 85 100 oxygen ina background of argon by measuring the thermal conduc 4 32 Teledyne Analytical Instruments Infrared Gas
54. instrumentbetween the ANALYZE screen Analysis Mode and the MAIN MENU screen Setup Mode The ANALYZE screenis the only screen of the Analysis Mode The MAIN MENU screen is the top level in a series of screens used in the Setup Mode to configure the analyzer for the specific application DOWN UP commands scroll through the options displayed onthe VFD screen The selectable option appears between arrows When you reach the desired option by scrolling ENTER the selection as described below ESCAPE takes you back up the hierarchy of screens until you reach the ANALYZE MODE ESCAPING any further just toggles between the MAIN MENU and the ANALYZE screen NOTE The main menu times out after 5 five seconds returning to the analyze screen Submenus time out after 10 minutes 4 2 1 1 Analysis Mode Thisisthe normal operating mode The analyzer monitors the oconcentra tion ofthe mixure content of the sample displays the percent of the concentra tioninthe sample stream and warns of any alarm conditions Pressing any key switches you to Setup Mode Setup Mode switches back to Analyze Mode if nocontrols are used for more than five seconds 4 2 Teledyne Analytical Instruments Infrared Gas Analyzer Operation 4 SETUP MODE Span Zero Span Zero Span Zero AO Off On Timing Off On Password Yes No Password Password Secure Sys amp LOGOUT Analyze Only MODEL how Model and Version Self Test in Slef Test Auto Manua Spa
55. ion gases in the first line and the range in the second line In the lower right corner the abbreviation Anlz indicates that the analyzeris inthe Analyze mode If there is an before the Anlz it indicates that the range is linearized 1 95 nR1 10 Anlz h indicates non inverting range 1 indicates inverting range 4 26 Teledyne Analytical Instruments Infrared Gas Analyzer Operation 4 If the concentration detected is over range the first line ofthe display blinks continuously 4 8 Programming CAUTION The programming functions of the Set Range and Curve Algorithm screens are configured at the facto ry to the users application specification These func tions should only be reprogrammed by trained qualified personnel To program you must 1 Enter the password if you are using the analyzer s password protection capability 2 Connecta 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 Now you will be able to select the APPLICATION and ALGORITHM setup functions 4 8 1 The Set Application Screen TheSet Application screen allows reprogramming ofthe three analysis ranges and the calibration range including impurity gas background gas low end of range highend ofrange and or ppm units Original programming is usually done at the factory according to the customer s appl
56. izer Itis the simulated output of the analyzer You do not need to actually flow gas The OUTPUT value is the output of the linearizer Itshould be the ACTU AL concentration of the span gas being simulated If the OUTPUT value shownis not correct the linearization must be correct ed ESCAPE to return to the previous screen Select and Enter SET UP to Calibration Mode screen Select algorithm mode AUTO There are two ways to linearize AUTO and MANUAL The auto mode requires as many calibration gases as there will be correction points along the curve The user decides on the number of points based on the precision re quired The manual mode only requires entering the values for each correction point into the microprocessor via the front panel buttons Again the number of points required is determined by the user 4 3 8 Troubleshooting information Accessing the HARDW VAR function will allow a qualified technician to get further information on the health ofthe analyzer This is acomplimentary troubleshooting tool to SELF TEST Information displayed in the VFD display is shownbelow Calib_factor 5 00 This is the slope calibration value of the span defaultis 5 00 AtoD_ave 1289 This is the raw ADC count 262144 to 262143 are acceptable raw counts but must still be evaluated by knowing what gas is flowing through the analyzer IOffset r g 2492 Thisisthe current zero offset from the zero calibration ofthe gain and range
57. lained above 6 Check that the instrument reads the entered offset 7 Reintroduce the process background gas mix to the 7300A sample cell inthe Analyze mode It should read close to zero once the reading is stable 1 error of full scale Spanning the 7300A Since the instrument might be spanned witha background gas the same as the zero calibration gas the span value to be entered should be the span concentration plus the offset value if the offset value has a minus sign then algebraically itbecomes a subtraction 4 3 11 CAL OUT Function Selectingthe CAL OUT functionin menu makes possibleto calibrate the output of the 4 to 20 madc In hardware terms this function calibrates the Digital to Analog converter that feeds a signal to the 4 to 20 madc E I converter Calibrating the 4 to 20 madc output should be part of routine maintenance Tocalibrate the 4 to 20 madc output a calibrated multi meter configured as an ammeter has to be connected to the analyzer to monitor the output When ready enter the CAL OUT function The following screen will be shown on the VFDdisplay 4 14 Teledyne Analytical Instruments Infrared Gas Analyzer Operation 4 Adjst output to 4ma SENT to OK 2 Usethe Upor Down key to adjust the number on the VFD display The range of this number is from 255 to 255 As this number changes so should the reading of the ammeter Adjust this number until the reading of the ammeter is as close as possi
58. lecting any controls Use the UP or DOWN key to scroll the blinking over to PSWD and press Enterto select the password function Either the default TAl password or AAA place holders for an existing password will appear on screen depending on whether or nota password has been previously installed Enter password TAI Enter password The screen prompts you to enter the current password If you are notusing password protection press Enter to accept TAI as the default password If a passwordhas been previously installed enterthe password using the ENTER key to scroll through the letters and the UP or DOWN key to change the letters to the proper password The last ENTER enters the password Inafew seconds you will be given the opportunity to change this pass word or keep it and go on Change Password lt ENT gt Yes lt ESC gt No Teledyne Analytical Instruments 4 7 4 7300 Press Escape to move or proceed in Changing the Passvord below 4 3 3 2 Installingor Changing the Password If you want to install a password or change an existing password proceed as above in Entering the Password When you are given the opportunity to change the password Change Password lt ENT gt Yes lt ESC gt No Enterto change the password either the default TAI or the previously assigned password or press Escape to keep the existing password and move on If youchose Enterto c
59. n Value Span in Span Select Set Progress Auto Manua Zero in ZERO Select Gas Use ppm Setpoints amp ALARMS Select Attributes Auto Manual Range Adj Gas Auto Application Troublsho oting Data Filter CAL Calibrate Analog OUTPUT Output Select Define Select Range Appl Range OFF INV ES Verify GD Man fnput Output Auto Manual Linearity Cal Select Linrty Span Values Offset Figure 4 1 Hierarchy of Functions and Subfunctions Set Auto Teledyne Analytical Instruments 4 3 4 7300 4 4 4 2 1 2 Setup Mode The MAIN MENU consists of 14 functions you canuse to customize and check the operation ofthe analyzer Figure 4 1 shows the functions available with the 7300A They are listed here with brief descriptions 1 10 11 12 13 14 AUTO CAL Used to define and or start an automatic calibration sequence PSWD Used to establish password protection or change the existing password LOGOUT Logging out prevents unauthorized tampering with the analyzer settings MODEL Displays Manufacturer Model and Software version of the instrument SELF TEST The instrument performs a self diagnostic routine to check the integrity of the power supply output boards cell and amplifiers SPAN Set up and or start a span calibration ZERO start a zero calibration ALARMS Used to set the alarm setpoints and determine whether each alarm will be
60. n in the MAIN MENU you will now be required to reenter the password to gain access to Alarm and Range functions 4 3 4 Logging Out The LOGOUT function provides a convenient means of leaving the analyzer inapassword protected mode without having to shut the instrument off By entering LOGOUT you effectively log off the instrument leaving the system protected against use until the password is reentered To log out scroll to field of LOGOUT function and ENTER to logout The screen will display the message Protected until password entered 4 3 5 System Self Diagnostic Test The Model 7300A has a built in self diagnostic testing routine Prepro gramming signals are sent through the power supply output board preamp board and sensor circuit The return signal is analyzed and at the end of the test the status of each function is displayed on the screen either as OK or as a number between 1 and 1024 See System Self Diagnostic Test in chapter 5 fornumber code If any of the functions fails the System Alarm is tripped Note The sensor will always show failed unless identical gas is present in both channels at the time of the SELF TEST Teledyne Analytical Instruments 4 9 4 7300 The self diagnostics are run automatically by the analyzer whenever the instrumentis turned on but the test can also be run by the operator at will To initiate a self diagnostic test during operation use the UP DOWN key t
61. nd balanced which provides a standard of source energy output for comparison The gas of interest is present in the measurement tube however the energy of the beam will be attenuated at the specific absorption wavelength After passing through the two tubes the radiant beams are reflected and imaged by a second concave mirror onto a photon detector A spectral filter located just in front of the detector represents the precise window of the absorption band for the specific gas of interest Energy outside the band is eliminated The detector converts the optical energy from the radiant beams into an electrical signal which is modulated in proportion to the gas concentration Rip Detector Preamp C Auto Zero I 1 L K gt 1 PR i Difference Amplifier i Source m Amplifier gt 1 f 1 1 1 i Detector Preamp Converter Thermistor Heater 1 o C Auto Range LL 0 1 V dc Concentration Digitial to and Range Analog Temperature Converter l Control Coarse 6 1 DAC Adjustment 4 20 mA de Fine Adjustment 2 I 99 Alarm 2 System ys Failure Alarm gt Reyboard pl Central Processing Range Unit EPI Contacts 4 CPU nu Displa
62. nterest The concentration must be 80 to 95 of the full scale range or the widest range of the instrument if the instrument provides more than one range 2 6 2 Calibration Refer to Section 4 4 of the manual to determine how to manipulate the mode setting The recommended calibration method is as follows Method 2 12 Teledyne Analytical Instruments Infrared Gas Analyzer Installation 2 1 Introduce zero fluid and set zero as referred in section 4 4 1 NOTE Whencalibrating from 0 to an upper concentration gas obtain azero gas minus the analyte that typically is as pure as the minimumresolution needed to control to This usually meets or exceeds the minimum full scale accuracy of the measurement 2 Introduce a span fluid and set the concentration of the span fluid Refer to the span procedure in section 4 4 2 Note The span gas should typically be an 8096 of full scale range gas similar to the 10046 zero gas background i e 10096 CO zero gas and a span gas of 98 496 CO2 in N2 for a 98 10096CO2 purity application Teledyne Analytical Instruments 2 13 2 Installation 7300 2 14 Teledyne Analytical Instruments Infrared Gas Analyzer Start up and Operation 3 0 Start up and Operation 3 1 Preliminary Before applying povver to the system TAI suggests that the electrical wiring installation be checked against the system input output diagram Proper attention to this preliminary check will pr
63. o scroll through the MAIN MENU to the SELF TEST and Enter The screen will follow the running of the diagnostic RUNNING DIAGNOSTIC Testing Preamp Cell When the testing is complete the results are displayed Power OK Analog OK Cell 2 Preamp 3 The moduleis functioning properly ifitis followed by OK A number indicates a problem ina specific area of the instrument Refer to Chapter 5 Maintenance and Troubleshooting for number code information The results screen alternates for a time with Press Any Key To Continue Then the analyzer returns to the initial System screen 4 3 6 The Model Screen Scroll through the MAIN MENU to MODEL and Enter The screen displays the manufacturer model and software version information 4 3 7 Checking Linearity with ALGORITHM Use UP DOWN control to select ALGORITHM and Enter sel rng to set algo 01 02 03 lt Use the UP DOWN Control to select the range 01 02 or 03 Then press Enter Gas Use C02 Range 10 Enter again Algorithm setup VERIFY SET UP Use UP DOWN key to select and Enter VERIFY to check whether the linearization has been accomplished satisfactorily 4 10 29 Teledyne Analytical Instruments Infrared Gas Analyzer Operation 4 Dpt INPUT OUTPUT 0 0 00 0 00 The leftmost digit under Dpt is the number of the data point being moni tored Use the UP DOWN key to select the successive points The INPUT valueis the input to the linear
64. oes not include the contributions of the bench sampling system and the preamplifier near the detector Setting 10 90 Response seconds 0 2 5 1 5 2 10 3 20 4 40 5 80 4 12 Teledyne Analytical Instruments Infrared Gas Analyzer Operation 4 6 160 7 320 amp 640 9 1280 10 2360 The response time listed above can and will change depending on the application and they merely serve toillustrate the effect of the digital filter The digital filter disengages ifthere is an upset thatis more than 5 of full scale As thereading comes within the range the filter becomes active once again 4 3 10 Zero Offset Adjustment The software in this instrument provides a way to enter an offset on the zero operation of the analyzer Ifthe background gas of the process is different than the zero calibration gas being used the reading will have an offset that will beconstant throughoutits working range Thus the need to provide an offset whenthe instrumentis being zeroed How to access the offset function Toaccess this function Scroll through the menu and select OFFSET Press the Enter key to see the following screen Enter zero offset 0 00 The offset value can be modified by using the Up Down keys Next section shows how to select this value Suffice to say that whatever value you enter will be automatically added to the reading Thus if you entered 0 10 at the end of the zero the display will show 0 10 90 When
65. on e Calibrate the instrument e Choose autoranging or select a fixed range of analysis e Set alarm setpoints and modes of alarm operation latching fail safe etc Program Reprogram the analyzer Define new applications e your ranges Special functions setup e Set output reversal Set polarity reversal or offset output S e Set gain amplification Before you configure your 7300A the following default values are in effect RANGE APPLICATIONS refer to data sheet on the first page of this manual Range Manual AlarmRelays Defeated 0 00 HI NOT Fail Safe not latching Zero Auto every 0 days 0 hours Span Auto at 10 every 0 days at 0 hours Password TAI Teledyne Analytical Instruments 4 1 4 7300 4 2 Using the Controls To get the proper response from these controls press the desired key ESCAPE or ENTER DOWN or UP To enter the screen menu press any Rey The item that is between arrows the screen is the item thatis currently selectable by pressing the ENTER enter Rey In these instructions to ENTER means to press the ENTER REY andto ESCAPE means to press the ESCAPE KEY To scroll UP or scroll DOWN means to press UPor DOWN keys as many times as necessary to reach the required menu item 4 2 1 Mode Function Selection Whenthe analyzeris first poweredup and has completed its initialization andself diagnostics ESCAPE toggles the
66. oncentration 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 2 2 Analog Output Connections Pin Function Range ID 4 20 mA floating Range ID 4 20 mA floating Range 4 20 mA floating Range 4 20 mA floating Range ID 0 1 V dc 23 RangeID 0 1 V dc negative ground 24 Range 0 1 V dc 7 Range 0 1 V dc negative ground QN A Q Examples The analog output signal has a voltage vvhich depends on gas concen tration relative to the full scale of the range To relate the signal output to the actual concentration it is necessary to know what range the instrument is currently on especially when the analyzer is in the autoranging mode The signal output for concentration is linear over the currently selected analysis range For example if the analyzer is set on a range that was defined as 0 10 carbon monoxide then the output would be as shown in Table 2 3 Table 2 3 Analog Concentration Output Example Percent Voltage Signal Current Signal CO Output V dc Output mA dc 0 0 0 4 0 1 0 1 5 6 2 0 2 7 2 3 0 3 8 6 4 0 4 10 4 5 0 5 12 0 Teledyne Analytical Instruments 2 5 2 Installation Model 7300 6 0 6 13 6 7 0 7 15 2 8 0 8 16 8 9 0 9 18 4 10 1 0 20 0 provide an indication of the range the Range ID analog outputs used They generate a steady
67. onents 29 Teledyne Analytical Instruments 5 Maintenance Model 7300 5 6 Troubleshooting 5 7 General This section contains information on the assembly and the electronic sections of the Model 7300A Infrared Analyzer The sample handling sections of the system are statistically low failure items and only require the maintenance as pertinent to sample system operation plugging flowrates leaks etc Flow system failures are usually of the nature that are easily resolved by personnel familiar with basic mechanics of the Model 7300A flow system or sample system The electronic sections are more complex requiring the assistance of personnel trained in electronics in the event of failure The electronics sections ofthe analyzers include advanced solid state and digital circuitry which requires a thorough understanding of circuit theory and troubleshooting techniques NOTE It is recommended that only qualified electronic technicians troubleshoot electronic failures within the analyzers Although both analyzers contain plug in printed circuit panels service personnel should be familiar both with the analyzer theory of operation and the basics of analog circuit theory before troubleshooting All basic customer electronic adjustments and calibrations of the analyzer can be accomplished with a DC volt ohm meter preferably with a digital readout All circuit boards are of the plug in replaceable type and only require a DC voltmete
68. proximately 0 1 to 0 4 scfh Note Always keep the zero calibration gases flow as close as the flowrate of sample gas as possible 4 4 1 Zero Cal The ZERO function in the MAIN MENU is used to enter the zero calibra tion function Zero calibration can be performed in either the automatic or manual mode CAUTION If you are zeroing the Cal Range by itself multiple application analyzers only use manual mode zeroing 4 16 Teledyne Analytical Instruments Infrared Gas Analyzer Operation 4 If you vvant to calibrate ALL of the ranges at once multiple application analyzers only use auto mode zeroing 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 Auto Mode Zeroing Observe the precautions in sections 4 4 and 4 4 1 above Scroll to ZERO function buy using UP DOWN control and enter the zero function mode The screen allows you to select whether the zero calibration is to be performed automatically or manually Use the UP DOWN key to toggle between AUTO and MAN zero settling Stop when AUTO appears blinking onthe display Select zero mode AUTO Press Enterto begin zeroing c02 51 C Zero The beginning zero level is shown in the upper left corner of the display As the zero reading settles the screen displays and updates information on Slope in ppm second unless the
69. quires entering the values for each correction point into the microprocessor via the front panel buttons Again the number of points requiredis determined by the user Note Before performing section 4 8 2 or 4 8 2 3 you must check to ensure that your calibration gases or points are between low end and high end of the range setup All correction points must be between the Zero and the Span concentration Do not enter the Zero and Span points as part of the correction 4 8 2 2 Manual Mode Linearization Tolinearize manually you must have previous knowledge ofthe nonlinear thermal conductivity characteristics of your gases Youenterthe value ofthe differential between the actual concentration and the apparent concentration analyzer output Analytical Instruments has tabular data of this type fora large number of gases which it maRes available to customers on request See Appen dix forordering information To enter data 4 30 29 Teledyne Analytical Instruments Infrared Gas Analyzer Operation 4 From the MAIN MENU Screen 1 Use UP DOWN to select ALGORITHM and Enter 2 Select and Enter SETUP 3 Select MANUAL from the Calibration Mode Select screen Dpt INPUT OUTPUT 1 0 00 0 00 The data entry screenresembles the verify screen but the gas values be modified and the data point number cannot Use the UP DOWN Rey to set the INPUT value for the lowest concentra tion into the first point ENTER to move to OUTPUT fi
70. r for set up The following is a listing of parts needed for electronic calibration and troubleshooting ofthe analyzers Accurate DC volt ohm meter digital readout with clip type leads Miniature clip type jumper leads 12 long Small blade screwdriver TAI P N S 190 5 6 29 Teledyne Analytical Instruments Infrared Gas Analyzer Maintenance 5 5 8 TROUBLE SHOOTING CHART SYMPTOM A Unit does not turn ON vvhen actuating Povver Switch Motor does not turn B No Zero Control with unit on Zero gas Out put is either dead or fully saturated CORRECTIVE ACTION a Check AC voltage at inlet for correct voltage Reset breaker or switch to supply power to receptacle b Check power to terminal strip located inside cabinet CAUTION Terminal strip contains 90 220volt line voltage which can be hazar dous Check for loose connec tion to one of the terminal board lugs replace as required a Check that Power is ON b Check that power supply voltages are correct 15VDC A15VDC c Check output of TP6 on preamp board with a DC voltmeter should be less than or 3VDC If output can be zeroed check volt ages at TPI and TP2 on Linearizer board should also be zero Then check adjustments on E I board d Check that infrared source is operating If no light check source element resistance and connections e Try to execute a manual zero Teledyne Analytical Instruments 5 7 5
71. r which the parts are intended Orders should be sent to TELEDYNE Analytical Instruments 16830 Chestnut Street City of Industry CA 91749 1580 Phone 626 934 1500 Fax 626 961 2538 TWX 910 584 1887 TDYANYL COID www teledyne ai com or your local representative Teledyne Analytical Instruments A 3 Appendix Model 7300A ATTACHMENT 7300A Quote Exceptions and GAS PHASE Conditions for this application 4 Response Time is proportional to sample system design for take off distance process pressure line size by pass flow design dead volumes tee s sample cell volume and instrument electronics We assume no particulates that could plug the lines or contaminate the optical components Control the pressure in the measuring sample cell to within 0 5 96 of the nominal operating cell pressure for example 760 mm x 4 mm Hg absolute is required return pressure assume to be stable at 1 ATM A Maximum cell operation pressure to be 5 psig based upon stan dard metal sapphire cell design The sample flow through the analyzer should be regulated to within 5 of its recommended absolute nominal set point flow value This will avoid any pressure drops across any orifices The temperature of the sample from the take off thorough the sample cell must be maintained above its dew point to prevent any moisture or vapor pressure for other possible condensables mists from occurring and affecting instrument performance
72. round which are not of mea suring interest Both the component of interest and the background compo nent may have complex IR absorption spectra The quantitative measurement of a compound using the 7300A is based on the Beer Lambert Law where the intensity of a beam of monochromatic radiation transmitted through a sample decreases exponentially as the con centration of the absorbing sample increases The use of two filters and detectors allows cancellation of energy changes due to turbidity dirty sample cell windows aging of the source and sudden temperature changes The center pass band of the measuring filter is selected to transmit energy in a narrow region band pass where the component of interest absorbs strongly by comparison with the background components The center pass band of the reference filter is generally selected to transmit energy in a band pass region where the background absorption of IR energy is equiva lent to that seen by the measuring filter and also to be in a region where the component of interest has minimal absorption of energy The IR radiation passes through the sample and filters and strikes the detectors which convert the radiation into electrical signals and are then amplified Signal processing involves comparing the measuring and reference signals in order to give a readout representing the component of interest concentration in the sample Teledyne Analytical Instruments 1 3 1 Introduction
73. s 13 Customer must auto zero and span calibrate as specified in the compli ance sheet Teledyne Analytical Instruments A 5
74. s ranges if more than one may be programmed for separate or identical gas applications 2 Ifall ranges are for the same application then you will not need the Cal Range Calibrating any one oftheranges will automatically calibrate the others 3 If a eachrange is programmed fora different gas application b your sensor calibration has drifted less than 10 90 and c your Cal Range was cali brated along with your other ranges when last calibrated then you can use the Cal Range to calibrate all applications ranges at once If your Model 7300A analyzer fits the paragraph 3 description above use the Cal Range If your analyzer has drifted more than 10 46 calibrate each rangeindividually CAUTION Always allow 4 5 hours warm up time before calibrat ing if your analyzer has been disconnected from its power source This does not apply if the analyzer was plugged in but was in STANDBY The analyzeris calibrated using reference zero and span gases Gas requirements are covered in detail in chapter 3 section 3 4 Gas Connections Check that calibration gases are connected to the analyzer according to the instructions in section 3 4 observing all the prescribed precautions Note Shut off the gas pressure before connecting it to the analyzer and be sure to limit pressure to 40 psig or less when turning it back on Readjustthe gas pressure into the analyzeruntil the flowrate through the sensor settles between 50 to 200 cc min ap
75. semble Housing as shown in Figure 5 1 Jumper Bar mn Ew emt USE UE Fuse Block MIN Qe Fuse ap Cover e g P e E American Fuses European Fuses Figure 5 2 Installing Fuses 5 1 Routine Maintenance The 7300 should be inspected on a regular schedule to be determined by the maintenance personnel The system filter and analyzer measurement cell should be maintained as required by the quality of the sample Periodic calibration of the system will assure accurate analysis of the sample gas and will also indicate the need for maintenance A regular calibration schedule should include recording of the zero and span pot values for performance trends Clogging of the sample system and other system problems will usually show early symptoms during online analysis or during calibration Problems with the system not due to the normal processing of the sample are sometimes failures which must be corrected 5 2 Filter The system filter element if included should also be periodically inspected Replacement is recommended when the element begins to restrict sample flow or upon visual inspection looks clogged and dirty NOTE Although not normally included on basic Model 7300A analyzers input protection filtering is always recom mended Refer to the system piping schematic for recom mended hook up 5 2 Teledyne Analytical Instruments Infrared Gas Analyzer Maintenance 5 5 3 NDIR
76. t have a composition similar to sample an ideally contains none of the components of interest Initialize a zero operation through the system menu Refer to Section 4 for Electronics Control Unit Modes and Functioning to navigate the zero menu After the zero cycle is over the instrument is not yet calibrated Permit the instrument to operate in this mode for at least 3 hours to stabilize if not already done so upon initial power up Repeat Zero Calibration followed by a Span Calibration NOTE The following options could be included in your system In case the instrument is part of a multi instrument system where all instruments are connected to the same sample system and under control of a single timer all instruments of the system will go through the zero and sample cycle simultaneously The Control Unit of the instrument which houses the timer and operates the sampling system is called the master The other Control Units of the other instruments are called slaves Each of the other instruments may be monitoring the concentration of several different gases of interest in the sample for example CO CO2 and or Combustibles as CH4 in flue gas 3 2 2 Operational Calibration After the instrument has stabilized let zero gas flow through the analyzer Perform a zero of the analyzer After the Zero operation and analyzer returnining to sample perform a Span calibration Open the span gas tank and set the pressure regulator to 20 ps
77. t in the measurement cell the more energy its molecules absorb The NDIR analyzer needs four basic components to measure the spectral absorbance A source of emitted infrared radiation to be absorbed by the gas of interest b A chamber opened to accept a flowing sample gas C A detector specifically tuned to measure only the wavelength of infrared energy that will be absorbed by the gas being measured For example carbon monoxide requires a detector turned to 4 65 microns while carbon dioxide needs one tuned to 4 27 microns d An electronics system to process the changes in the electronic resistance of the detector and to convert these changes into specific electronics signals that deliver a voltage at current linearly proportional to the concentration of the gas measured The Teledyne NDIR analyzer employs all of the above features 3 3 2 Analyzer The emitted IR energy is generated by one specially configured miniature lamps in parabola s focused and operating at low power of only 0 5 watts 29 Teledyne Analytical Instruments 3 3 3 Start up and Theory of Operation Model 7300 These lamps are typically rated for 20 000 hours continuous operation when run in the DC mode 4 5 VDC This collimated energy is directed through parallel infrared beams The radiant energy passes through tubes containing a continuously flowing sample gas As the beam passes through the reference tube the energy of the beam is unattenuated a
78. the instrument enters the zero modein AUTO the instrument will do the work of bringing the reading back to zero plus the offset value that was entered If youchose MANual zero mode then you must adjust the zero of the instrument the corresponding section of the manual but with one difference instead of bringing the display to read zero you must make the display read zero plus the value entered as offset Teledyne Analytical Instruments 4 13 4 7300 How the offset value is selected Tofind out whatthe offset value should be the intended zero calibration gasandthe mix ofthe process background gas must be procured This of course assumes thatthe zero gas and the process background gas are very different and thatanoffset will occur 1 Let the intended zero calibration gas flow through the 7300A sample cell this assumes that you have started up your system as recommended by the manual or technical personnel and do a zero on the instrument Leave the offset set to zero value 2 At the end ofthe zero function make sure the analyzer reads zero 3 Span the analyzer 4 Flow the process background gas mix through the 7300A sample cell on the Analyze mode Wait for the reading to become stable Write the reading down Change the sign of the reading This is the offset to be entered 5 Do a manual run to check the analyzer operation Reintroduce the zero calibration gas Enter the zero Offset value as exp
79. tion gas To set up the output reversal or output offset see section 4 8 1 set AP PLICATION sceen NOTE If the inverting has been setup i shall display on the left bottom corner Otherwise the left bottom corner display n NOTE In the example 40 CO is discouraged because it is hard to produce the exact concentration 4 9 2 Polarity Reversal Insome special applications user will find thatthe display dispalys negative concentration values even if proper span gasisinjected correct this problem TAIhas added the Polarity Correction feature This feature can be set asfollow Close S1 5 range 1 Close S1 6 range 2 Close 51 7 range 3 Close 51 8 cal range Teledyne Analytical Instruments 4 33 4 7300 Select STANDBY to restart the system 4 9 3 Gain Preset NOTE This function will apply only for the analizer that has multiple range and non linearity Fornonlinear application the signal produced by the infrared detector will notcorrespond to the actual gas concentration The amplification of each range will not agree therefore the gain must be preset in order for the signal to read linearly To set the gain the following must be performed in sequence NOTE Before setting up this feature you must have a span gas containing 90 100 of the lowest range of the analyzer Setunitrange to lovvestrange NOTE For output reversal the lovvest range should be range
80. ture can be overridden so that analog output stays ona fixedrange regardless of the contaminant concentration detected If the concen tration exceeds the upper limit of the range the DC output will saturate at 1 V dc 20 mA at the current output However the digital readout and the RS 232 output of the concentration are unaffected by the fixed range They continue to read beyond the full scale setting until amplifier saturation is reached Below amplifier saturation the over 4 24 Teledyne Analytical Instruments Infrared Gas Analyzer Operation 4 range readings are accurate UNLESS the application uses linearization over the selected range Theconcentrationranges can be redefinedusing the Rangefunction Manual screen and the application gases can be redefined using the APPLICA TION function if they are not already defined as necessary CAUTION Redefining applications or ranges might require re linearization and or recalibration To setup automatic ranging Select range on the MAIN MENU and ENTER to start the Range func tion Select 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 manual If above screen displays use the UP DOWN key to Select AUTO and Enter Press Escapetoreturn to the previous Analyze Function 4 6 3 Precautions TheModel 7300A allows a great deal of flexibility in choosing r
81. unction escaped reproduced at the appropriate point in the procedure in a Mono spaced typestyle Push button names are printed in Obliquetype 4 3 2 Setting up an AUTO CAL When proper automatic valving is connected see chapter 3 installation the Analyzer can cycle itself through a sequence of steps that automatically zero and span the instrument Note Before setting up an AUTO CAL be sure you understand the Zero and Span functions as described in section 4 4 and follow 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 7300A is accurate to 2 3 Accordingly internally scheduled calibrations can vary 2 3 per day Note If your ranges are configured for different applications then AUTO CAL will calibrate all of the ranges simultaneously by calibrating the Cal Range To setup an AUTO CAL cycle The VFD will display five subfunctions Call out MAIN MENU scroll to AUTO CAL function and ENTER A new screen for ZERO SPAN set appears ZERO in Od h off SPAN in Od h off Use UP or DOWN key to blink ZERO or SPAN then Enter You won t be able to set OFF to ON if a zero interval is entered A Span Every or Zero Every screen appears Zero schedule OFF Day Od Hour Oh Use UP or DOWN key to set a value in days then ENTER to move to the start time value in hours Use UP or DOWN keys to set a
82. up Mode sion renard 4 2 2 1 rM EE 4 222 EREE a aa 4 3 2 Setting up 00422 4 3 3 Password Protection 22 4 3 3 1 Entering the Password 4 3 3 2 Installing or Changing the Password 4 3 4 Logging Out uet 4 3 5 System Self Diagnostic Test 4 3 6 The Model Screen 4 3 7 Checking Linearity with Algorithm 4 3 8 Trouble Shooting Information 4 3 9 Digital Flter Setup 4424 442 222 4 3 10 Zero Offset Adjustment 4 3 11 CAL OUT FONS at 4 4 The Zero and Span Functions 4 4 1 topi am DLE 4 4 1 1 Auto Mode 4 3 4 1 2 Manual Mode Zeroing 3 4 1 3 Gell Failure ettet tet sm Teledyne Analytical Instruments Model 7300A Infrared Gas Analyzer 4 4 2 1 Auto Mode Spanning 4 4 2 2 Manual Mode 4 5 The Alarms Function treni 4 6 The Range Select Function
83. ure of 10 50psig with a typical flow rate of 0 1 to 0 6 SCFH 50 250 cc min is needed Bottled gas is recommended air or Nitrogen if high quality air is not avail able For accurate calibration the analyzer requires blended gas mixtures certified to 2 accuracy Teledyne Analytical Instruments 2 11 2 Installation Model 7300 2 5 Testing the System Before plugging the instrument into the power source e Check the integrity and accuracy of the fluid connections Make sure there are no leaks e Check the integrity and accuracy of the electrical connections Make sure there are no exposed conductors Check that sample pressure is controlled accuracately and is maintained between 5 to 10 psig according to the requirements of your process NOTE Special designed systems may require checks under vacuum or high pressure consult manual addendum Power up the system and test it by performing the following operations 1 Repeatthe Self Diagnostic Test section 5 2 2 6 Calibration 2 6 1 Calibration Fluids Zero fluids must be made by the chemistry lab or certified zero and span gas bought from a gas supplier The zero fluid must be the major component of the sample free from the component of interest Note In Non purity applications the reference cell may be sealed with clean air consult factory The span fluid must be the major component of the sample mixed with amount of the component of i
84. ut Piece vvise approximation is the method used to linearize the signal i e the linearizer s output to input relationship can be graphed as a number of straight line segments connected together to approximate the desired curve that would be required to compensate for the nonlinearity of the bench The points at which the compensation curve changes slope are called breakpoints The slope of each segment corresponds to the gain of the linearizer in that segment and this gain has to vary according to the input voltage This is achieved through software by adjusting a multiplier factor at each straight line segment The linearizer has nine specific voltage segments 3 8 49 Teledyne Analytical Instruments Infrared Gas Analyzer Start up and Operation 3 7 AUTOMATIC FUNCTION Optional The events talking place during a zero cycle are as follows 1 The zero cycle starts with activation of the calibration contact The analyzer outputs are held during the zero cycle 2 The Auto Zero solenoid valve optional is activated and zero gas replaces the sample This valve may be internal or external to the Model 7300A enclosure 3 At about minute one in the cycle The Auto Zero board then begins its zeroing function adjusting the processing circuitry of the analyzer to develop a zero signal output During this period the analyzer display may swing from below zero to above fullscale several times before it finally settles to zero output The
85. when DC power supplied to circuits is unacceptable in one or more parameters Permanently configured as failsafe and latching Cannot be de feated Actuates if self test fails Reset by pressing button to remove power Then press again and any other button EXCEPT Systemtoresume Further detail can be found in chapter 4 section 4 5 Pin 45 28 46 42 44 43 36 20 37 Table 2 5 Alarm Relay Contact Pins Contact Threshold Alarm 1 normally closed contact Threshold Alarm 1 moving contact Threshold Alarm 1 normally open contact Threshold Alarm 2 normally closed contact Threshold Alarm 2 moving contact Threshold Alarm 2 normally open contact System Alarm normally closed contact System Alarm moving contact System Alarm normally open contact 2 3 3 3 Digital Remote Cal Inputs Accept 0 V off or 24 V dc on inputs for remote control of calibra tion See Remote Calibration Protocol below See Table 2 5 for pin connections Zero Span Floating input A 5 to 24 V pulse input across the and pins puts the analyzer into the Zero mode Either side may be grounded at the source of the signal A synchronous signal must open and close the gas control valves appropriately Floating input A 5 to 24 V pulse input across the and pins puts the analyzer into the Span mode Either side may be grounded at the source of the signal A synchronous signal must open and close the gas control valves appropriately
86. y of the IR source the length of the cell and the type of fluid in the cell Usually the output is between 0 2 and 0 9 mVDC The Teledyne detector consists of four detec tors A B C and D They are strapped to the inputs of the positive very high gain amplifiers U1 U2 U3 and U4 Amplifiers U1 through U4 are high quality very low offset amplifiers Preamplified signals usually between 2 to 1 0 volt are delivered via the ribbon cable to the measuring board through an 8 point dip switch Connectors deliver power from the measuring board to the amplifiers and 300 450 mADC current to the IR source The motherboard serves as a power distribution and interface board The Auto Zero amplifier PCB board is mounted on top of the Motherboard These boards are accessible by sliding the system out of the case after removing the screws on the back plate The Temperature Control Board keeps the temperature of the measur ing cell regulated to within 0 1 degree C A thermistor is used to measure the temperature and a zero crossing switch regulates the power of the heaters inside the sample chamber The result is a sensor output signal that is tem perature independent The output of the preamp is fed to variable gain amplifier which provides automatic range switching under control of the CPU The output from the variable gain amplifier is sent to an 18 bit analog to digital con verter The digital concentration signal along with input from t
87. your password to access the alarm functions Follow the instructions in section 4 3 3 to enter your password Once you have clearance to proceed enter the Alarm function Note If all ranges are for the same application set any one of them will automatically set the others Press the Alarmbutton on the front panel to enter the Alarm function Make sure that 01 is blinking Sel rng to set alm 01 02 03 lt Set upthe Range 1 alarm by moving the blinking overto 01 using the UP DOWNarrow keys Then Enter Check the gas application and range limits as displayedon the screen Gas use C02 Range 0 10 Press enter again to set the alarm setpoints Sel 2 ppm alm to set AL1 PPM AL2 PPM Use the UP DOWN keys to choose between 96 or ppm units Then Enterto moveto the next screen AL1 1000 ppm Dft N Fs N Ltch N Five parameters can be changed on this screen e Value of the alarm setpoint AL 1 e Out of range direction HI or LO Defeated Dft Y N Yes No e Failsafe Fs Y N Yes No e Latching Ltch Y N Yes No To define the setpoint use the UP DOWN key while screen is blinking over to AL Use the UP DOWN Rey to change 4 22 27 Teledyne Analytical Instruments Infrared Gas Analyzer Operation 4 the number Holding dovvn the Rey speeds up the incrementing or decrementing e After the number value has been choosed use Enter to move the desired parameter Then use the UP DOWN keys
88. ys Processing 1 External Valve Control I Remote Span Control Power Remote Zero Supply F 0 gt Control Cal Contact M Block Diagram of the Model 7300A Electronics 3 4 29 Teledyne Analytical Instruments Infrared Gas Analyzer Start up and Operation 3 4 Circuit Description The Teledyne Analytical Instruments IR bench is a multiple vvave length single beam design It uses a quadruple detector that consists of a specially designed patented thermopile with small IR filters mounted in front of it to produce independent voltages These correspond to the transmission of energy at each filter s wavelength They are amplified by special high stability operational amplifiers to produce the output of the device IR energy is generated by a filament IR source operating at a moder ately elevated temperature The cell cavity allows the sample gases to pass between the IR source and the detector Sapphire cell windows allow passage of this IR energy with minimal absorption The gases that pass through the cell absorb energy of the IR band at different wavelengths within the spectrum An optical filter is mounted on the face of each detector Each detector responds to a particular wavelength producing a voltage proportional to the energy that has passed through the gas and filter If the gas concentration changes

Teledyne 7300A User's Manual

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