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EC9841 Operation Manual

1. 2 OUT OF SERVICE Out of service switch has been activated on analyzer 2 VOL Measuring in volumetric units i e PPM Unit 1 Digit pigie a Digit 4 Digit 0 NO FAILURE NO FAILURE NO FAILURE GRAV 1 CHOPFAIL REFFAIL ZEROON GRAV 2 LAMPFAIL HEATERFAIL OUT OF SERVICE VOL 3 CHOPFAIL REFFAIL ZEROON VOL LAMPFAIL HEATERFAIL OUT OF SERVICE 4 FLOWFAIL COOLERFAIL HV FAII GRAV 5 CHOPFAIL REFFAIL ZEROON GRAV FLOWFAIL COOLERFAIL HV FAII 6 LAMPFAIL HEATERFAIL OUT OF SERVICE VOL FLOWFAIL COOLERFAIL HV FAII 7 CHOPFAIL REFFAIL ZEROON VOL LAMPFAIL HEATERFAIL OUT OF SERVICE FLOWFAIL COOLERFAIL HV FAIL 8 SYSFAIL CVFAIL PS FAIL GRAV SPANON 9 CHOPFAIL REFFAIL ZEROON GRAV SYSFAIL CVFAIL PS FAIL SPANON A LAMPFAIL HEATERFAIL OUT OF SERVICE VOL SYSFAIL CVFAIL PS FAIL SPANON B CHOPFAIL REFFAIL ZEROON VOL LAMPFAIL HEATERFAIL OUT OF SERVICE SPANON SYSFAIL CVFAIL PS FAIL C FLOWFAIL COOLERFAIL HV FAIL GRAV SYSFAIL CVFAIL PS FAIL SPANON D CHOPFAIL REFFAIL ZEROON GRAV FLOWFAIL COOLERFAIL HV FAIL SPANON SYSFAIL CVFAIL PS FAIL E LAMPFAIL HEATERFAIL OUT OF SERVICE VOL FLOWFAIL COOLERFAIL HV FAIL SPANON SYSFAIL CVFAIL PS FAIL F CHOPFAIL REFFAIL ZEROON VOL LAMPFAIL HEATERFAIL OUT OF SERVICE SPANON FLOWFAIL COOLERFAIL HV FAIL SYSFAIL CVFAIL PS FAIL 98417600 Rev E EC9841 NOx ANALYZER OPERATION MANUAL CHOPFAIL Indicates that the chopp
2. 1 4 4 24 4 32 V Valve Test Menu 2 25 Valve Test Menu illustration 2 25 EC9841 NOx ANALYZER OPERATION MANUAL APPENDIX A USB PROTOCOL PARAMETER LIST Note parameters are for all EC9800 analyzers and may not be applicable to an individual ana lyzer Description Notes 0 Internal Valve 1 0 Closed 1 Open 1 Internal Valve 2 0 Closed 1 Open 2 Internal Valve 3 0 Closed 1 Open 3 External Measure Valve 0 Closed 1 Open 4 External Zero Valve 0 Closed 1 Open 5 External Span Valve 0 Closed 1 Open 6 Aux Valve 1 0 Closed 1 Open 7 Aux Valve 2 0 Closed 1 Open 8 Aux Valve 3 0 Closed 1 Open 9 Valve Sequencing 0 Off 1 On 10 LCD Contrast POT O Lightest 99 Darkest 11 PRE POT 1 Measure coarse pot for all analysers except 9841A which is chassis fan speed 12 PRE POT 2 Measure Fine 981X 9820 9830 9841 9842 Bench Fan Speed 9841A Reference zero 9850 13 PREPOT3 Input for all except 9850 which is measure gain 14 PRE POT 4 981X 984X Test Measure 9820 9830 test reference 9850 reference gain 15 PREPOTS5 981X Lamp Adjust 9820 9830 9850 test measure 984X high voltage adjust 16 PREPOT6 9850 high voltage adjust 17 PREPOT7 9850 lamp adjust 18 VREGPOT I Flow control zero 19 VREG POT 2 20 VREG POT 3 21 VREG POT 4
3. 2 37 EC9841 NOx ANALYZER OPERATION MANUAL 2 38 2 5 21 System Faults Screen SYSTEM FAULTS CELL TEMPERATURE SAMPLE GAS FLOW VALVE MANIFOLD TEMP A D INPUT 12 VOLT SUPPLY CONVERTER TEMP COOLER STATUS HIGH VOLTAGE Figure 2 28 System Faults Screen The SYSTEM FAULTS display provides a start pass or fail indication for various parameters which are continually monitored These parameters must be within acceptable operating ranges in order to display Pass If the instrument is in startup mode START will be displayed Additional information on the SYSTEM FAULTS screen is included in the EC9841 Service Manual 98417600 Rev E CHAPTER 2 INSTALLATION amp OPERATION 2 6 Analog Output Analog output connections are described in 2 1 2 1 above Before setting up the recorder and DAS analog outputs decide what offset and over ranging choices to make A brief explanation of these terms follows then the setup procedure is given The setting of the analog output and over range has no impact on the measurement range of the analyzer it only affects the analog output scaling 2 6 1 Offset and Live Zero 98417600 Rev E At any selected output range the operator may want to observe negative signal indications Moving the zero indication up the scale to a specific point creates a live zero thus allowing the recorder or DAS to show negative as well as positive indications The adjustment used to
4. eee 2 10 M Menu eiecti Rer pr eren 2 17 Main Menu illustration 2 17 Manual Calibration 2 22 Manual Calibration Menu illustration 2 22 Measurement Menu 2 19 Measurement Menu illustration 2 19 Multidrop communications sess 4 13 Multipoint calibration 3 3 3 7 3 13 Multipoint calibration with over ranging 3 29 N NO NOx NO2 Current Output Menu 2 29 NO NOx NO2 Voltage Output Menu 2 30 Offset adjustment sse 2 36 Operation od eei ettet 2 9 Original protocol eee 4 10 Output Test Menu sse 2 24 Output Test Menu illustration 2 24 Over range adjustment sse 2 37 Over Range as Seen on a Strip Chart Recorder llustration er 2 38 Over Taning ete ts 3 29 P Password protection cessere 2 40 Permeation device calibration 3 22 Preprocessor Pots Menu 2 24 Preprocessor Pots Menu illustration 2 24 Primary Screen uii peo pec eei 2 16 Protocol 1 4 10 Protocol Bavarian 4 11 98417600 Rev E C
5. 46 50 PIN IO bits 40 47 BIT 7 BIT 6 BIT 5 BIT 4 BIT 3 BIT 2 BIT 1 P6 BIT 0 P5 47 50 PIN IO bits 48 55 BIT 7 Status 2 LED BIT 6 Status 1 LED BIT 5 Sys Fail LED BIT 4 HeartBeat LED BIT 3 BIT 2 BIT 1 BIT 0 48 50 PIN IO bits 56 63 BIT 7 BIT 6 BIT 5 BIT 4 BIT 3 BIT 2 BIT 1 BIT 0 Status 3 LED 49 PGA Gain 0 7 50 Primary Gas Concentration 51 Secondary Gas Concentration 52 Calculated Gas Concentration 53 Primary Gas Average 54 Secondary Gas Average 55 Calculated Gas Average 56 Instrument Gain 57 Main Gas ID 58 Aux Gas ID 59 Decimal Places 60 Noise 61 Gas 1 Offset 62 Gas 3 Offset 63 Flow Temperature 64 Lamp Current 65 Digital Supply 66 Concentration Voltage 67 High Voltage 68 Ozonator 0 Off 1 On 98417600 Rev E EC9841 NOx ANALYZER OPERATION MANUAL 69 Control Loop 70 Diagnostic Mode 71 Gas Flow 72 Gas Pressure 73 Ambient Pressure 74 Analog Supply 75 Cell Temperature 76 Converter Temperature 77 Chassis Temperature 78 Manifold Temperature 79 Cooler Temperature 80 Mirror Temperature 81 Lamp Temperature 82 O03 Lamp Temperature 83 Instrument Status 84 Reference Voltage 85 Calibration State 0 MEASURE 1 CYCLE 2 ZERO 3 SPAN 86 Primary Raw Concentration before 984X background and gain 87 S
6. Baud rate Choose the baud rate that has been set on the analyzer 4 6 3 2 2 Modem Connection Connect using Choose from the list of modems detected from the computer Phone Enter the phone number to which the analyzer is connected 4 6 3 2 3 USB Connection Analyzer 4 32 98417600 Rev E CHAPTER 4 DIGITAL COMMUNICATION Select the analyzer to communicate with from a detected list 4 6 3 3 Analyzer Tab This function sets the analyzer information for the analyzer being communicated with Analyzer ID If the user has multidropped multiple analyzers onto the one communication line enter the ID of the analyzer to communicate with Average Data Tick this box to download the averaged data that has been generated by the analyzer Instantaneous Data Tick this box to download the instantaneous data that has been generated by the analyzer 4 6 4 Keyboard shortcuts 98417600 Rev E The following are keyboard shortcuts that can be used in general operation of the program o F2 Display the Settings dialog box o F5 Start communicating with analyzer o F6 Stop communicating with analyzer 4 33 EC9841 NOx ANALYZER OPERATION MANUAL INDEX 5 50 Pin Connector Board with Sample Choices Gllustration esee 2 4 9 9800 command 4 7 4 17 A Analog Output 2 29 2 31 Analog Output Menu illustration 2 29
7. Enter This completes the span calibration of the EC9841 analyzer 2 15 EC9841 NOx ANALYZER OPERATION MANUAL 2 5 Menus and Screens This section illustrates the various menus and screens for the EC9841 analyzer A short description of each menu and screen is provided The entire menu structure is shown below in Figure 2 6 MAIN MENU INSTRUMENT MENU CALIBRATION MENU TEST MENU NTERFACE MENU TREND SELECT MENU EVENT LOG NSTRUMENT STATUS SYSTEM SYSTEM 2 16 TEMPERATURES FAULTS L MEASUREMENT MENU DATE TIME PASSWORD ERASE MEMORY MAIN GAS ID AUX GAS ID CALIBRATION TIMED TIMER INTERVAL STARTING HOUR CYCLE TIME NO TIMED SPAN NO2 TIMED SPAN SPAN COMP NO SPAN RATIO NO2 SPAN RATIO NOx CAL PRESSURE NO CAL PRESSURE OUTPUT TEST MENU DIAGNOSTIC MENU CALCULATION FACTORS MEASUREMENT GAIN PRES TEMP FLOW COMP DIAGNOSTIC MODE OZONATOR CONTROL LOOP ANALOG OUTPUT MENU DATA LOGGING MENU MAIN GAS ID INTERFACE MODE MULTIDROP BAUD DATA LENGTH STOP BITS PARITY COMM PROTOCOL NETWORK ADAPTOR GAS FLOW GAS PRESSURE AMBIENT PRESS CONC VOLTAGE ANALOG SUPPLY DIGITAL SUPPLY HIGH VOLTAGE VERSION CELL TEMPERATURE SAMPLE GAS FLOW VALVE MANIFOLD TEMP A D INPUT 12 VOLT SUPPLY REFERENCE VOLTAGE CONVERTER TEMP COOLER STATUS HIGH VOLTAGE tt ENT 1 UN CO DECIMA T SELECTION VERSION TEMP L PLACES AVERAGE PERIOD FILTER
8. Permeation Tubes Permeation Rate Concentration NIST SRM Type _ 25 C in ppm 1629 Nitrogen Dioxide 0 532 1 lpm 0 106 5 lpm Cylinders of working gas traceable to NIST SRMs called U S EPA Protocol Calibration Gases are also commercially available 3 10 1 NO Working Standards Traced to NIST Standards The NO content of the NO working standard must be periodically assayed against NIST traceable NO or NO standards Any NO impurity in the cylinder must also be assayed Certification of the NO working standard should be made quarterly or more frequently as required Procedures are outlined below for certification against either an NO or NO NIST traceable standard The simplest and most straightforward procedure is to certify against an NO standard Note If the assayed concentration of the NO impurity in the NO cylinder NO mp is greater than the 1 ppm make certain that the NO delivery system is not the source of contamination before discarding the NO standard See section 3 4 3 for the procedure for treating the gas delivery system 3 10 1 1 NO Working Standard Traced to NIST NO Standard First use the NIST traceable NO standard and the GPT calibration procedure to calibrate the NO NO and NO responses of the analyzer Also determine the 98417600 Rev E 3 27 EC9841 NOx ANALYZER OPERATION MANUAL efficiency of the molycon Refer to the calibration procedure described in section 3 6 for details Then generate se
9. ecotech environmen tal monitoring solutions EC9841 Oxides of Nitrogen Analyser User Manual www ecotech com EC9841 Quick Start Guide Step 1 Installation Inspect analyzer for damage before turning on Service Manual 1 1 Select an appropriate location Operation Manual 2 1 1 Connect Gas lines Operation Manual 2 1 2 2 Connect Analog Output Cables Operation Manual 2 1 2 1 Connect RS232 Cables Operation Manual 4 2 1 Check the mains power selection switch 115 or 230 VAC Operation Manual 2 2 Connect AC Mains Power Operation Manual 2 2 Step 2 Start up Set Service Switches Service Manual 1 1 2 Turn On power Operation Manual 2 2 The Display should read 9841 NO Analyzer Adjust the Display Contrast if required Operation Manual 2 2 1 Verify that the software is running by observing the Ecotech Globe rotating in the bottom left hand corner of the display step 3 Operation Verify Instrument warm up and operation mode Service Manual 2 2 Set the correct time and date Operation Manual 2 3 3 If using RS232 configure the Interface menu Operation Manual 2 5 11 Check SYSTEM FAULTS menu All PASS Operation Manual 2 5 21 Verify other menu settings Service Manual 4 2 4 Calibration Perform a quick single point calibration Operation Manual 2 4 Setup and Calibrate the Analog Outputs if applicable Operation Manual 2 6 3 If n
10. 0 CYCLE TIME 15 MINS NO TIMED SPAN 10 000 PPM NO2 TIMED SPAN 10 000 PPM SPAN COMP ENABLED NO SPAN RATIO 1 000 NO2 SPAN RATIO 1 000 NOx CAL PRESSURE 750 0 TORR NO CAL PRESSURE 750 0 TORR Figure 2 11 Timed Calibration Menu CALIBRATION Designates TIMED or MANUAL calibration control TIMER INTERVAL The number of hours between the zero span checks STARTING HOUR The hour when the first zero span check will be performed CYCLE TIME The period 1 to 59 minutes of the zero amp span steps during a timed calibration NO TIMED SPAN Digital setting of the span concentration the operator expects the instrument to read NO2 TIMED SPAN Digital setting of the span concentration the operator expects the instrument to read SPAN COMP A choice of ENABLED Or DISABLED See Chapter 3 for a description of automatic zero span AZS checks NO SPAN RATIO A microprocessor generated field that is the value the span reading is multiplied to correct it to the calibration value This value is only applied if SPAN COMP is ENABLED 98417600 Rev E 2 23 EC9841 NOx ANALYZER OPERATION MANUAL NO2 SPAN RATIO A microprocessor generated field that is the value the span reading is multiplied to correct it to the calibration value This value is only applied if SPAN is ENABLED NOx CAL PRESSURE This is the measured ambient pressure during the last NO calibration NO
11. 1 ANAIN2 11 Unused analog input 2 IOUTI 15 Analog current output 1 Note 3 IOUT2 17 Analog current output 2 Note 4 4 1 EC9841 NOx ANALYZER OPERATION MANUAL 4 2 Signal Name SPANCYL OUTSERV ZEROON SPANON ZEROCYL IZSON STARTUP PPM MET FLOWFAIL LAMPFAIL Number Function 18 19 20 21 22 23 24 25 26 27 28 20 30 3l 32 33 35 36 Active output indicates that the instrument is in the Span or Span Fill mode Active output indicates that the Out of Service switch is in the out of service position Active output indicates that the instrument is in the Zero mode Active output indicates that the instrument is in the Span mode Active output indicates that the instrument is in the Zero or Zero Fill mode Active output indicates that Internal Zero Span has been selected Note 5 Active output indicates that the startup sequence is active Active output indicates that the instrument is in mg M USER ID byte bit 1 Used in conjunction with the PINID serial command USER ID byte bit 2 Used in conjunction with the PINID command 05 d Hi byte bit 3 Used in conjunction with the PINID command USER ID byte bit 4 Used in conjunction with the PINID command 05 d H D byte bit 5 Used in conjunction with the PINID command USER ID byte bit 6 Used in conjuncti
12. 3 are available via the 50 PIN IO connector Calculation factors CALCULATION FACTORS NO INSTRUMENT GAIN 1 0592 P T F CORRECTION 1 0390 BACKGROUND 0 0012 ZERO OFFSET 0 0000 PPB NOx INSTRUMENT GAIN 1 0427 P T F CORRECTION 1 0398 BACKGROUND 0 0016 NO2 ZERO OFFSET 0 0000 PPB CONVERTER EFFICIENCY 91 97 EXIT 2 29 EC9841 NOx ANALYZER OPERATION MANUAL Figure 2 18 Calculation Factors Menu The Calculation factors screen is a non editable screen which provides the values used to calculate different aspects of measurement and calibration 2 5 12 Interface Menu INTERFACE MENU ANALOG OUTPUT MENU DATA LOGGING MENU MAIN GAS ID 041 INTERFACE MODE COMMAND MULTIDROP BAUD 2400 DATA LENGTH 8 BITS STOP BITS 1 BIT PARITY NONE COMM PROTOCOL ORIGINAL Figure 2 19 Interface Menu The INTERFACE MENU is used for adjustments related to the interfacing instruments The following are used only when one or more of the serial ports are to be used See output connections information in Chapter 4 Digital Communication MAIN GAS ID The ID address of the analyzer when Multidrop RS232 communications is used INTERFACE MODE This establishes the RS232 communication mode Choices are COMMAND or TERMINAL TERMINAL uses the menu structure and COMMAND uses the 9800 Serial Command Set MULTIDROP BAUD The communication rate for RS232 DB9 connector on rear panel The ava
13. CHAPTER 2 INSTALLATION amp OPERATION 2 5 3 Instrument Menu INSTRUMENT MENU MEASUREMENT MENU DATE 15 AUG 03 TIME 18 57 PASSWORD UNLOCKED DUAL GAIN OFF ERASE MEMORY NO MAIN GAS ID 041 AUX GAS ID 000 Figure 2 9 Instrument Menu The items in the INSTRUMENT MENU address instrument settings needed to initiate operation DATE The date format is day month year TIME Set in 24 hour format Setting the time resets the seconds internally to zero for synchronization with an external clock PASSWORD See section 2 7 Password Protection DUAL GAIN The instrument can be placed into two modes dual instrument gain by selecting YES and single instrument gain by selecting No Only single gain mode is U S EPA approved ERASE MEMORY Memory can be erased in two different ways either RAM which does not wipe some settings or SETTINGS which will erase everything and reset all settings to default If you do not wish to erase all setting select NO when the following message is displayed THIS WILL ERASE SYSTEM GAINS ARE YOU SURE NO The word No is highlighted in this warning Scrolling to yes and pressing Enter will erase the memory in the analyzer 98417600 Rev E 2 19 EC9841 NOx ANALYZER OPERATION MANUAL Caution If the analyzer memory is erased all user configured parameters will return to their default values In addition all instrument calibration will
14. NO2 FI NOISE NO NO2 CA CA NOx CA NO CAL OF PREPROCESSOR POTS VALVE TEST MENU TYPE LTER OFFSET FSET LIBRATION MANUAL L MODE L PRESSURE PRESSURE MULTIDROP PORT TEST WATCHDOG TEST DISPLAY TEST ANALOG NO OUTPUT MENU NOx OUTPUT MENU NO2 OUTPUT MENU AVERAGE DATA DATA TOTAL CAPACITY ERASE LOGGED DATA INST NO NOx NO2 NO NOx NO2 CONCENTRATION CONCENTRATION CONCENTRATION AVERAGE AVERAGE AVERAGE ZERO OFFSET OUTPUT TEST E SPAN COMPENSATION SAMPLE SAMPLE FLOW PRESSURE CONVERTER TEMP CELL TEMP CONV TEMP CHASSI S TEMP MANIFOLD TEMP COOLER Figure 2 6 Menu Structure TEMP INPUT TEST MEASURE HIGH VOLTAGE ADJUST NO CONC VOLTAGE HIGH VOLTAGE INT VALVE 1 INT VALVE 2 INT VALVE 3 INT VALVE 4 INT VALVE 5 EXT MEASURE EXT ZERO GAS EXT SPAN GAS VALVE SEQUENCING RANGE OUTPUT TYPE OFFSET FULL SCALE ZERO ADJUST OVER RANGE OVER RANGING RANGE OUTPUT TYPE OFFSET FULL SCALE ZERO ADJUST OVER RANGE OVER RANGING RANGE OUTPUT TYPE OFFSET FULL SCALE ZERO ADJUST OVER RANGE OVER RANGING 98417600 Rev E CHAPTER 2 INSTALLATION amp OPERATION Note The values shown in the illustrations are examples only Your display will be affected by the settings you choose 2 5 1 Primary Screen NO NO2 Instrument NOx i gain NO SAMPLE MEASURE STATUS LINE 8 INSTRUMENT 4
15. The USB port is located on the rear of the analyzer This cannot be multidropped with other analyzers but multiple analyzers can be connected to a single USB port on a computer by using a USB hub This connection is ideal for collecting data from a standalone analyzer or using a laptop that may not have a serial port see Figure 4 4 below 98417600 Rev E 4 25 EC9841 NOx ANALYZER OPERATION MANUAL CO Anal Data Logger ea Os Analyzer ID 2 Ty Mae Analyzer SO Analyzer ID 4 Figure 4 4 Configuration for analyzers using USB to communicate with Datalogger via a USB Hub 4 5 1 Installing the driver on a PC The following are instructions to install the EC9841 analyzer to a computer through the USB connection It will provide efficient communication between the analyzer and computer with the use of the EC9800 Communicator software described in section 4 6 NOTE Screen shots and instructions below apply to Windows XP but will be similar for any other Windows operating system 1 Turn on computer and log in 2 Connect the analyzer by USB cable to the USB port on the rear of the computer 3 After 10 20 seconds the dialog box shown in should appear If no dialog box appears open the Control Panel and double click Add New Hardware 4 26 98417600 Rev E CHAPTER 4 DIGITAL COMMUNICATION Found New Hardware Wizard Welcome to the Found New Hardware Wizard This wizard helps you install software for Ecotech 9810 Ana
16. and molecular sieve 6 16 mesh type 4A to remove any NO excess O and hydrocarbons Silica gel maintains its drying efficiency until it has absorbed 20 of its weight and can be regenerated indefinitely at 120 C The addition of cobalt chloride to the surface of the gel provides an indicating ability This type of gel contained in a transparent drying column is recommended The mixture of activated charcoal and a molecular sieve also has a finite absorption capability Since it is difficult to determine when the mixture s absorption capacity has been exceeded it is recommended that the mixture be replaced at regular intervals at least every three months for an absorption volume of about 0 1 slpm 98417600 Rev E 3 19 EC9841 NOx ANALYZER OPERATION MANUAL 3 8 6 Dynamic Parameter Specifications 3 8 6 1 Flow Rates The O generator air flow rate F5 and the NO flow rate positioned as shown in Figure 3 1 must be adjusted so that the following relationship holds P 2 NO xt 2 75 ppm minutes Equation 3 0 7 N 3 F Equation 3 0 8 V tk lt 2 minutes Fo Fko Equation 3 0 9 where P dynamic parameter specification determined empirically to ensure complete reaction of the available in ppm min NO concentration in the reaction chamber in ppm tg residence time of the reactant ga
17. is programmed the I D can be used to address any analyzer connected to the RS232 line An example of this is shown here DCONC CR Caution Using this I D will result in a response from all analyzers connected to the serial line An example of an 9800 command with a parameter would be the trend dump command DTREND used here with an instrument I D of 134 DTREND 134 1 1 GASAVG lt CR gt 4 4 2 Bavarian Network Command Set Format All Bavarian Network commands follow the command format as specified in this section The specific Bavarian commands and their function are described in section 4 4 5 1 Bavarian Network Command Format lt STX gt lt TEXT gt lt ETX gt lt BCC1 gt lt BCC2 gt Where 4 8 98417600 Rev E CHAPTER 4 DIGITAL COMMUNICATION lt STX gt ASCII Start Of Transmission 02 hex lt TEXT gt ASCII text maximum length of 120 characters lt ETX gt ASCII end of transmission 03 hex lt BCCl gt ASCII representation of block check value MSB lt BCC2 gt ASCII representation of block check value LSB The block check algorithm begins with 00 Hex and exclusive OR each ASCII character from sTX to ETx inclusive This block check value is then converted to ASCII format and sent after the lt ETx gt character 4 4 2 1 Examples The following is an example of a valid Bavarian data request for an instrument that has an I D of 97 lt STX gt DA097
18. o lt stx gt character is ignored o The lt ETX gt character is a valid termination for Bavarian commands even in the absence of a sTx character o The Da command will function without a serial I D The string DA CR is a valid command o The zero padding on the response to the DA command contains six ASCII zeros instead of the standard ten ASCII zeros o The data type must be sent on 9800 style commands but it is not checked against the actual parameters o The number of data parameters must be sent on 9800 style commands but it is not checked against the actual parameters 4 4 3 5 Bavarian Protocol This protocol is intended to correct the idiosyncrasies in the original protocol as noted in section 4 4 3 1 as they apply to the Bavarian network This protocol selection strictly applies the Bavarian network protocol to all commands 4 4 3 6 Command Acknowledgment o For 9800 style commands that provide a data response the response itself is the acknowledgment o For 9800 style commands that do not provide a data response no acknowledgment is returned o For Bavarian Network commands no acknowledgment is returned 4 4 3 7 Negative Acknowledgment For 9800 commands and for Bavarian Network commands no negative command acknowledgment is sent 98417600 Rev E 4 11 EC9841 NOx ANALYZER OPERATION MANUAL 4 4 3 8 Bavarian Protocol Idiosyncrasies g g The string DA lt CR gt is
19. the analyzer must be re calibrated in order to meet U S EPA requirements CONVERSION TEMP Sets the temperature that should be used in internal calculations to convert the concentration from volumetric units ppm ppb ppt into gravimetric units mG M nG M or nG M in DEGREES CELCIUS 0 20 25 This menu option is only displayed when the gravimetric units are selected DECIMAL PLACES Set the number of decimal places in which the data is displayed on the screen 0 1 2 3 APP Note The screen is able to display up to 7 characters of data including the decimal place for each reading AVERAGE PERIOD Set time in hours 1 4 8 12 or 24 or minutes 1 3 5 10 15 or 30 This establishes the period for average computations This field is a wraparound field FILTER TYPE Sets the time constant of the digital filter Choices are NO FILTER 300 SECONDS 90 SECONDS 60 SECONDS 30 SECONDS 10 SECONDS Or KALMAN adaptive Note The Kalman filter is the factory default setting and must be used when using the instrument as a U S EPA equivalent method The Kalman filter also gives the best overall performance for this instrument EC9841 NOx ANALYZER OPERATION MANUAL 2 22 NO2 FILTER A choice of ENABLED Or DISABLED When ENABLED is selected a low pass digital filter is applied to the NO measurement This filter is used to remove any NO artifact resulting from small pneumatic differe
20. 1000 calibrator can provide a reliable source of ozone It consists of a cell adjacent to a low pressure mercury vapor lamp Ozone free air is passed through the tube and is irradiated with 185 nm light from the mercury lamp The level of irradiation is controlled electronically Ozone concentrations are varied by a switch At a fixed temperature pressure air flow and level of irradiation ozone is produced at a constant rate A change in air flow causes an inverse change in the ozone concentration when all other variables are held constant This type of ozone source can generally supply up to 3 ppm of O at an air flow in the range of 1 to 10 slpm depending on the size of the generator To determine the operational characteristics of a particular ozone generator adjust the ozone source to near maximum irradiation then measure the O produced at different levels of air flow through the generator eg to 10 slpm A calibrated ozone monitor or other means of measuring O concentrations is necessary A plot of the O concentration versus the reciprocal air flow should be linear The air flow that gives the desired maximum O concentration as determined by the maximum concentration of NO needed for calibration represents the maximum total flow for a calibration system using the generator Of course lower air flows can be used to generate the required O concentration by simply reducing the level of irradiation of the UV lamp If the air flow c
21. 1v are available well as digital input control and digital output status The EC9841 also features internal data storage capabilities The instrument includes an over range feature that when enabled automatically switches the analog output to a preselected higher range if the reading exceeds 90 of the nominal range When the reading returns to 80 of the nominal range the analyzer automatically returns to that range The U S EPA has designated the EC9841 nitrogen oxides analyzer as an Equivalent Method Section 1 2 below includes the operational parameters necessary when using the analyzer in this mode 1 1 EC9841 NOx ANALYZER OPERATION MANUAL 1 1 Specifications Note All specifications are referenced to STP standard temperature and pressure 1 1 1 Range 3 Display Autoranging 0 to 20 ppm Resolution 1 ppt selectable units and decimal places o Analog output to full scale from 0 0 050 ppm to 0 20 ppm with 0 5 and 1046 offset o Autoranging between 2 user specified full scale values o U S EPA designated range Any full scale range between 0 to 0 05 ppm and 0 to 1 0 ppm 1 1 2 Noise RMS o Measurement process 0 25 ppb or 0 1 of concentration reading whichever is greater with Kalman filter active o Analog output 0 25 ppb or 0 1 of analog output full scale whichever is greater 1 1 3 Lower Detectable Limit o Measurement process Less than 0 5 ppb or 0 2 of concentration reading wh
22. 2 31 Analog Output Menu Current illustration 2 29 Analog Output Menu Voltage illustration 2 30 Analyzer Keyboard illustration 2 10 Analyzer Rear Panel illustration 2 2 Automatic zero and span 78 3 30 B Bavarian command 4 8 4 16 Bavarian protocol ssseseeee 4 11 C Cable Connections illustration 4 6 Calibration Apparatus with NO2 Permeation Tube illustration 3 14 Calibration Menu 2 22 Calibration Menu Timed 2 21 Calibration references sss 3 35 Calibration requirements eene 2 39 Calibration standards 3 5 3 26 Calibration using GPT esee 3 15 Calibration using permeation devices 3 22 Calibration 2 12 3 2 Calibration multipoint 3 3 3 7 3 13 Calibration multipoint with over ranging 3 29 Command set 9800 4 7 4 17 Command set 4 8 4 16 Communications multidrop 4 13 Connections exhaust 2 6 Connections recorder and DAS 2 2 Connecti
23. 22 VREG POT 5 Fan speed control 23 VREG POT 6 Pump speed fine 24 VREG POT 7 Pump speed coarse 25 Analogue input 0 26 Analogue input 1 27 Analogue input 2 98417600 Rev E EC9841 NOx ANALYZER OPERATION MANUAL 28 Analogue input 3 29 Analogue input 4 30 Analogue input 5 31 Analogue input 6 32 Analogue input 7 33 Analogue input 8 34 Analogue input 9 35 Analogue input 10 36 Analogue input 11 37 Analogue input 12 38 Analogue input 13 39 Analogue input 14 40 Analogue input 15 41 50 PIN IO bits 0 7 BIT 7 Span Out of Range BIT 6 Span On BIT 5 Copper Fail BIT 4 Zero On BIT 3 Lamp Fail BIT 2 Out Of Service BIT 1 Flow Fail BIT 0 Span Cycle 42 50 PIN IO bits 8 15 BIT 7 Pump On BIT 6 Range 1 BIT 5 Startup BIT 4 Heater Fail BIT 3 Range 0 BIT 2 IZS On BIT 1 Spare 1 BIT 0 ZeroCycle 43 50 PIN IO bits 16 23 BIT 7 Power On BIT 6 Sys Fail BIT 5 High Voltage Fail BIT 4 Power Supply Fail BIT 3 Electric Test BIT 2 Optical Test BIT 1 Range 2 BIT 0 PPm Metric 44 50 PIN IO bits 24 31 Really User ID 45 50 PIN IO bits 32 39 BIT 7 P4 BIT 6 P3 BIT 5 P2 BIT 4 P1 BIT 3 Spare Driver 1 BIT 2 BIT 1 98417600 Rev E CHAPTER 4 DIGITAL COMMUNICATION BIT 0 Reference Fail
24. 8096 of the calibration range Using one NIST permeation device and specifying an NO analyzer range of 0 to 0 5 ppm NO for example and a total flow of about 1 3 slpm as excess flow only about 1 0 slpm flow is available at the manifold for calibrating the NO analyzers If the lower limit of the total flow of the NO calibration gas is insufficient to meet the flow demand of the NO analyzers the problem could be solved by calibrating and using the analyzers on a more sensitive range whenever possible and appropriate Alternatively multiple permeation devices could be used in parallel to generate NO concentrations at the upper end of the calibration range Two NIST devices for example permits doubling the total flow at the manifold By venting the effluent of all but one of the devices NO concentrations in the lower portion of the range could be easily provided 3 10 Certification of Working Standards Against NIST Traceable Standards Calibration is normally done with a working standard so the standard traceable to an NIST standard is not used up This section describes methods of determining 3 26 98417600 Rev E CHAPTER 3 CALIBRATION the concentration of the working standard by comparing it to the NIST traceable standard The table below lists the NIST standards available Either a cylinder or a permeation tube can be used as the reference Cylinder Gases NIST SRM Type Size Liters STP Concentration
25. CAL MODE to SPAN Allow the analyzer to sample the gas until a stable reading is obtained typically 15 minutes From the primary screen start the calibration sequence by pressing either the Up or Down arrow key A or Y until the display prompts START MANUAL CALIBRATION Pressing the Select key will allow you to choose from No SPAN or ZERO Confirm that the display reads sPAN and press Enter 1 A backlit cursor will be displayed on the NO concentration display Use the Select key to move the position of the backlit cursor and the Up and Down arrow keys to increment and decrement the value of the backlit digit until the span calibration gas concentration value is displayed When the desired concentration is displayed press Enter From the primary screen as in step 2 start the calibration sequence by pressing either the Up or Down arrow A or until the display prompts START MANUAL CALIBRATION Pressing the Select key will allow you to choose from NO SPAN or ZERO Confirm that the display reads sPAN and press Enter 1 A backlit cursor will be displayed on the NO concentration display Now repeat steps 2 5 using the NO field in place of the NO field Next the efficiency of the converter must be determined Follow steps 2 4 above replacing the NO standard with an appropriate converter gas i e NO Use the readings on the screen and the known concentrations delivered to the instrument to
26. CAL PRESSURE This is the measured ambient pressure during the last NO calibration 2 5 5 2 Manual Calibration The following screen appears when CALIBRATION MANUAL is selected CALIBRATION MENU CALIBRATION MANUAL CAL MODE MEASURE NOx CAL PRESSURE 750 0 TORR NO CAL PRESSURE 750 0 TORR Figure 2 12 Manual Calibration Menu CALIBRATION Designates TIMED or MANUAL calibration control CAL MODE A choice of MEASURE normal mode CYCLE zero span sequence SPAN span valve or ZERO zero valve The choice is based on the valve the operator wants to open Selecting CYCLE starts an AZS cycle which is discussed in Chapter 3 NOx CAL PRESSURE This is the measured ambient pressure during the last NO calibration NO CAL PRESSURE This is the measured ambient pressure during the last NO calibration 2 24 98417600 Rev E CHAPTER 2 INSTALLATION amp OPERATION 2 5 6 Test Menu TEST MENU OUTPUT TEST MENU DIAGNOSTIC MENU CALCULATION FACTORS MEASUREMENT GAIN 32 PRES TEMP FLOW COMP ON DIAGNOSTIC MODE OPERATE OZONATOR ON CONTROL LOOP ENABLED TEST MEASURE 0 NO 0 00000 PPM Figure 2 13 Test Menu The TEST MENU includes a series of submenus containing information and control settings for testing and verifying instrument functions The operator may make changes to settings however when the instrument is returned to normal operation the instrument s automatic cont
27. D for a given analyzer The instrument can then be used standalone or as one of several multidrop daisy chain analyzers The format of this command is PIXXX YYY lt CR gt Where xxx 1s the unit I D yyy is the secondary unit I D o parameter xxx is the unit I D and must be three characters o Unit LD s such as 1 should be programmed as 001 o For the 9841 the yyy parameter is the second unit I D and may be used for any command query This is in support of existing Bavarian networks o Only one analyzer at a time may be programmed with an I D Do not issue this command with multiple units on a multidrop 4 4 4 3 Examples o The string P1001 lt crR gt will program a unit to the I D of 001 98417600 Rev E 4 15 EC9841 NOx ANALYZER OPERATION MANUAL 4 16 The string P1001 123 will program a unit to the I D of 001 with a serial number of 123 The string P1003 004 will program a EC9841 for a main I D of 003 and a secondary I D of 004 4 4 5 Serial Command Sets This section describes the Bavarian Network and 9800 command sets available on the EC9841 using the instrument Command mode 4 4 5 1 Bavarian Protocol Command Set Command DA Function Bavarian network command that returns the current instantaneous concentration Format lt STX gt DA lt DEVICE I D gt lt ETX gt lt BCC1 gt lt BCC2 gt Device response lt STX gt MD 02 lt SP gt lt kkk gt lt SP gt lt nnnn
28. Description 98417600 Rev E The EC9841 nitrogen oxides analyzer uses gas phase chemilluminescence detection to perform continuous analysis of nitric oxide NO total oxides of nitrogen NOx and nitrogen dioxide NO The 9841 analyzer design represents an advance in nitrogen oxides analysis technology achieved by using adaptive microprocessor control of a single measurement channel The instrument consists of a pneumatic system a NO to NO converter molycon a reaction cell detector PMT and processing electronics With an auto zero routine that allows the analyzer to periodically check and correct for background illumination the 9841 virtually eliminates zero drift In addition to temperature and pressure compensation the analyzer can adjust the span ratio based on a known concentration of gas used to span the analyzer This feature is not automatically implemented and must be selected by the operator Analog and digital outputs are available for data monitoring The operator can select analog output as either current or voltage output Current ranges are 0 to 20 mA 2 to 20 mA or 4 to 20 mA Voltage outputs with the 50 pin I O board include 0 to 10 V 0 to 5 V 0 to 1 V and 0 to 0 1 V The 50 pin I O board is optional in the EC9841 B series Data collection and recording is available for either a data acquisition system such as a datalogger or a strip chart recorder With the DB50 connector supplied voltage outputs of 0 to
29. Display Ad Ustments eet tnde he e he ee o o fer eene its 2 8 VEA MI E 2 9 273 OPERATION E 2 9 2 3 1 General Operation Information tenete neret trennen nene 2 10 2 3 2 Using the Menu and Making Entries eese esee ener neen rennen innere nennen 2 10 23 3 Setting the Dalte arnd RS RR aa S ee EU ai pere 2 11 2 4 ANALYZER CALIBRATION tester tee Ere eee lene eed reete eei Pre debet eres de ate eee UD eme 2 12 2 4 I PrectSio Checks3 S de e er E reve e m eed eive e INNO ei 2 12 2 4 2 UII 2 12 PARE IY L01 9110 PRAE A OE E RRR 2 12 2 4 4 Analyzer Calibration Instructions eee eese eene tentent rene ener 2 13 2 9 MENUS AND SCREENS sis certet etel epit etre utere e red e tet e dp e ed de cde Pale pet eee ety 2 16 USE Primary Sreem REM ied 2 17 2 5 2 Main 2 18 2 5 3 Instrument Menu a 2 19 2 5 4 Measurement Menu cccccccccccccccscsssccccecccssssnsscecececsensnnsaccececsensnsaeececsensaaeaecececsensnnsaeeececeesseseaaeaeeececeensnanes 2 20 2 25 29 Calibration Menus ise esee een ees tee e nas CAS Sues ed ee ces ese ie ARS tes ota de vp eve Cotes 2 22 2 5 0 Test Menus S ete enema ance eed 2 25 98417600 Rev E EC9841 NOx ANALYZER OPERATION
30. From this point forward it is impossible to select any alterable fields Return to the INSTRUMENT MENU and select the PAsswonp field The LOCKED message will disappear and 0000 appears in its place Using the Select and arrow keys scroll the numbers of the password entered previously When the password is displayed press the Enter key The password will disappear and be replaced by the message UNLOCKED 10 The analyzer is unlocked and the menu configuration can be altered 2 43 EC9841 NOx ANALYZER OPERATION MANUAL This page is intentionally left blank 2 44 98417600 Rev E CHAPTER 3 CALIBRATION 3 0 Calibration 3 1 Overview 98417600 Rev E The calibration chapter consists of o a general discussion of analyzer calibration o a description of the multipoint calibration procedure o a description of automatic zero span AZS setup o a discussion of the AZS feature The EC9841 nitrogen oxides analyzer is a precision measuring device that must be calibrated against known sources of nitric oxide NO and nitrogen dioxide NO traceable to National Institute of Standards and Technology NIST standards Formerly NIST was the National Bureau of Standards or NBS In general terms the calibration process consists of the following steps 1 Establish a reliable and stable calibrating source 2 Provide a satisfactory interface between the calibration source and the analyzer 3 C
31. Manual PN 98417005 Rev July 1999 The scope of this new manual covers the following analyzers o EC9841A Nitrogen Oxides Analyzer A Series PN 98413000 104 o EC9841B Nitrogen Oxides B Series PN 98417000 1 Both of the instruments are manufactured by Ecotech P L in Australia and support the new SMD Microprocessor Board Part number 98000063 4 This manual is current for firmware version 1 11 and above Ecotech Manual ID MAN 0012 Manual PN 98417600 Current Revision E Date Released May 2007 Description EC9841 Nitrogen Oxides Operation Manual A amp B Series Revision History Rev Date Summary Affected Pages A January 2004 New Release for new Microprocessor Board A amp B All series Combined Based on original manuals B February 2004 Changes to menu options and structure All C June 2005 Changed to updated EC manual formatting changes and updated safety information C 1 November 2005 Changes due to new process PCB second instrument Various gain added Calculation factors added 2 27 2 28 D March 2006 Changes to new process PCB instrument gains added Various E May 2007 Updated specifications language and links within pdf 98417600 Rev E manual created EC9841 NOx ANALYZER OPERATION MANUAL NOTE The photograph on the binder of this manual is of the south coast of Australia during Bushfires in 2003 The photograph is courtesy of Earth Sciences and Image Analysis Laboratory NASA Johnson Sp
32. OPERATION MANUAL Instruments suitable for use in a sheltered environment only Never operate this equipment in the presence of flammable liquids or vapors as this could cause a safety hazard Factory Service We strive to provide efficient and expedient service when an instrument or component is returned for repair Your assistance can help us to better provide the service you need To ensure that we process your factory repairs and returned goods efficiently and expeditiously we need your help Before you ship any equipment to our factory please call our Service Response Center at 61 1300 364 946 This enables us to complete the necessary paperwork and process your equipment correctly when it reaches our facility When you call please be prepared to provide the following information Your name and telephone number Your company name with shipping address The number of items being returned The part number of each item The model number or a description of each item The serial number of each item if applicable A description of the problem you are experiencing if factory repair is needed or the reason you are returning the equipment e g sales return warranty return etc The original sales order number or invoice number related to the equipment 9 Whether repair work is under warranty or is to be billed and a purchase order number for any work to be billed SOs AS 9o When you call in our Customer Service Represent
33. SPAN COMPENSATION SAMPLE FLOW SAMPLE PRESSURE CONVERTER TEMP Figure 2 24 Trend Select Menu Each graph is displayed as an x y plot with the x axis zero being the current time and the most distant number being the most historic data 2 5 18 Event Log Screen EVENT LOG REBOOT OCCURRED AT 17 30 30 0 03 ZERO FLOW OCCURRED AT 17 02 30 AUG 03 SERVICE SWITCH ACTIVATED OCCURRED AT 16 10 29 AUG 03 Figure 2 25 Event Log The EVENT LOG displays notations of key events such as auto zero and calibration or specific error conditions for up to 100 occurrences This screen is a first in last out type screen The first entry is the latest occurrence You can scroll through the events using the Up Down arrow keys A or 98417600 Rev E 2 35 EC9841 NOx ANALYZER OPERATION MANUAL 2 36 2 5 19 Instrument Status Screen INSTRUMENT STATUS GAS FLOW 0 64 SLPM GAS PRESSURE 168 2 TORR AMBIENT PRESS 625 5 TORR CONC VOLTAGE 3 500 VOLTS ANALOG SUPPLY 11 9 VOLTS DIGITAL SUPPLY 5 0 VOLTS HIGH VOLTAGE 650 VOLTS VERSION 1 03 0002 Figure 2 26 Instrument Status Screen INSTRUMENT STATUS is information continuously generated by the microprocessor for various parameters GAS FLOW Calculated gas flow Will indicate 0 00 if the flow transducer senses zero flow GAS PRESSURE Current Gas pressure is the sample pressure inside the reaction cell and should be a little below current barometri
34. The system consists of four sections 1 A controlled temperature chamber that houses the NO permeation device and is flushed continuously with purified dry zero air or nitrogen 3 23 EC9841 NOx ANALYZER OPERATION MANUAL 2 A regulated source of clean dry zero air for diluting the NO gas effluent from the permeation device The source should be capable of providing air flows up to about 20 slpm 3 An NO standard and delivery system 4 A dilution mixing sampling and exhaust section The suggestions for preparing regulating and measuring zero air flows discussed in connection with gas phase titration are applicable to this calibration system also An NO standard with delivery system and a suitable dilution mixing sampling and exhaust assembly were also discussed above Therefore the latter three sections of the permeation device calibration system do not require further discussion A description of the constant temperature section follows 3 9 3 Constant Temperature Chamber Temperature control is the primary concern in using an NO permeation device as a standard NO source For example a change in temperature of about 0 5 C effects a change in the permeation rate of the device of about 4 For that reason it is important that the temperature of the device be maintained at a constant value within 0 1 C and that it is closely monitored when the device is in use Generally the NO permeation device is housed in a temper
35. a valid command The DA command will function without an I D The data type must be sent on 9800 style commands but it is not checked against the actual parameters The number of data parameters must be sent on 9800 style commands but it is not checked against the actual parameters 4 4 3 9 Enhanced Protocol This protocol is provided to allow easier and more robust interfacing between the EC9841 and a computer Every command with a valid I D will respond with either lt ACK gt or lt NAK gt Bavarian commands also respond with either lt ACK gt or lt NAK gt although this is outside the normal Bavarian Network protocol Note This protocol selection should not be used in Bavarian network applications 4 4 3 10 Command Acknowledgment g For all valid 9800 and Bavarian commands an ASCII lt acx gt character is returned For commands that request data the data will be sent after the lt gt character 4 4 3 11 Negative Command Acknowledgment g 4 12 Any detected error will respond with the ASCII lt nax gt character followed by an error message Due to the constraints of the multidrop environment the unit I D must be received intact for a lt NAK gt response to be sent An invalid command will cause the response lt NAK gt UNKNOWN COMMAND lt CR gt lt LF gt An invalid command format will cause the response lt NAK gt BAD COMMAND FORMAT lt CR gt lt LF gt A bad block check on a Bavarian c
36. against NIST traceable NO or NO in N standards and for comparing the NO and NO working standards are discussed below 3 9 6 Basic Design Considerations for a Calibration System When designing a calibration system first determine the operational criteria the system must meet The calibration ranges the system must accommodate should be considered along with the corresponding total air flow required For maximum flexibility design the system for use with the widest applicable range normally 0 to 0 5 ppm NO for ambient air measurement it will serve more sensitive ranges when necessary Since the NO concentration is inversely proportional to the total flow at the manifold the minimum required NO concentration sets the upper limit of the dilution air flow For example using one NIST permeation device that generates about 1 ug NO min a total air flow of about 18 slpm is required to generate about 0 03 ppm NO Lower concentrations would of course require higher dilution air flows Another consideration is the number of NO analyzers that can be calibrated simultaneously with the calibration system This is controlled not only by the sum of the respective analyzer sample flow rates but also and most importantly by the minimum total flow of the calibration system at the manifold Air flow is at a minimum when the NO concentration is at a maximum As specified in the calibration procedure the maximum required NO concentration is about
37. before calibration Failure to purge the system properly causes calibration errors See section 3 4 3 2 Calculate the exact NO and NO concentrations from the following equations NO our FNO E 65 Equation 3 0 1 NO hes Fyo X INO 7p 130 lime Y Fy F Equation 3 0 2 where NO our diluted NO concentration at the output manifold in ppm diluted NO concentration at the output manifold in ppm NO rp concentration of the undiluted NO standard in ppm concentration of NO impurity in the standard NO cylinder in ppm Fyo flow rate of the NO standard corrected to 25 C and 760 torr 101 kPa in slpm 3 10 98417600 Rev E CHAPTER 3 CALIBRATION Fo generator air flow rate corrected to 25 C and 760 torr 101 kPa in slpm F dilution air flow rate corrected to 25 C and 760 torr 101 kPa in slpm Allow the analyzer to sample the NO NO concentration until stable NO and NOx responses are obtained From the primary screen press the Up or Down arrow key When you are prompted START MANUAL CALIBRATION respond SPAN by again pressing the Up or Down arrow key then Enter The cursor appears in the first digit of the NO concentration field Use the Select and arrow keys to input the NO span point concentration calculated in step 2 Use the Select key to select the digit to be changed and the Up or Down keys to chan
38. below outlines a dynamic calibration and zero span check schedule EC9841 NOx ANALYZER OPERATION MANUAL 3 6 Phase Examination Frequency Comments I Initial Examina Zero Span Check Not applicable The analyzer zero tion and span points must be checked soon after receiving shipment A zero span check must always precede calibration Calibration Not applicable The analyzer must be calibrated immedi ately after the initial zero span check II Routine Zero Span Check Frequency can be Examination altered based on a determination of reliability eboney III Long Term Zero Span Check To be determined Frequency deter Examination mined after accumu lation of data and analysis of Phase II 3 4 Calibration Standards 3 4 1 Standard Source of NO Calibrating a nitrogen oxides analyzer requires a standard source of NO in the range of 50 to 100 ppm with no more than 1 ppm NO impurity The most reliable NO sources are those using NO cylinders traceable to NIST standards and diluted by calibrators 3 4 2 Standard Source of NO An NO calibration standard can be obtained through the technique of GPT of an NO standard with O The facility for performing GPT is provided in the Ecotech GasCal 1000 calibrator Reliable NO calibration standards are also obtained using NO permeation tubes Contact Ecotech for details on the supply of a permeation calibrator which carries tubes traceable to a NIST primary standard With
39. calculate the converter efficiency NO measured NO2 expected Next move the cursor to the CONVERTER EFFICIENCY field If the converter efficiency is known to be other than 100 program this value and press Enter otherwise press lt Enter gt Press Exit to return to the primary screen The concentration on the primary screen should now read the same as the concentration of the calibration gas 98417600 Rev E 98417600 Rev E CHAPTER 2 INSTALLATION amp OPERATION Note The auto zero function of the EC9841 eliminates the need for a traditional zero calibration In special applications where a zero calibration is required the following procedure can be used 1 Connect a source of zero air to the analyzer through the Inlet port 2 Allow the analyzer to sample the gas until a stable reading is obtained typically 15 minutes 3 From the Primary Screen start the calibration sequence by pressing either the Up or Down arrow key A or Y until the display prompts START MANUAL CALIBRATION 2 ERO Confirm that the display reads zi ERO and press Enter 4 A backlit cursor will be displayed on the NO concentration display 4 Use the Select key to move the position of the backlit cursor and the Up and Down arrow keys to increment and decrement the value of the backlit digit until the NO zero value is displayed e g 0 000 PPM When the desired concentration is displayed press
40. create a live zero is OFFSET For example a 10 offset moves the zero indication to the point where 10 would normally be indicated The full reading available on the recorder paper or DAS would then be 10 to 90 of full scale See Figure 2 29 below Figure 2 29 Strip Charts Illustrating Offset 2 39 EC9841 NOx ANALYZER OPERATION MANUAL 2 40 Signal adjustments for zero and instrument gain to align the output with the user s recorder or other measurement device can be made in the ANALOG OUTPUT MENU in the fields FULL SCALE and ZERO ADJ These adjustments may be necessary due to tolerance buildup power supply variation etc in either the analyzer or the measurement device 2 6 2 Over Range Adjustment Over ranging is also enabled from the ANALOG OUTPUT MENU The OVER RANGE setting is the auxiliary range the operator chooses to track the data should the data exceed full scale of the original range The setting of OVER RANGE has no impact on the measurement range of the analyzer it only affects the analog output scaling With over ranging enabled as the concentration reaches 90 of the full scale value for the selected output range the software generates a positive spike that takes the indicator from the 90 position to the 100 position The output data is then scaled for the full scale chosen for over range As the output drops back to 80 of the original full scale the software generates a negative spike
41. enable over ranging by setting OVER RANGING to ENABLED 3 12 Automatic Zero Span Checks AZS Over time the calibration of nearly any sensitive instrument may change slightly drift causing error in the measured values Accordingly good quality assurance practice requires that the calibration of the EC9841 be checked periodically and if necessary that the instrument s span be adjusted to restore accurate calibration Section 12 of the Q A Handbook for Air Pollution Measurement Systems defines two types of calibration checks a Level 1 Zero and Span calibration check is an authoritative assessment of the analyzer s calibration using an NO or NO span gas standard that is certified traceable to a SRM or CRM The results of a Level 1 check can be used to adjust the analyzers zero and span to restore accurate calibration A Level 2 Zero and Span check is an informal calibration check often with an uncertified standard used to monitor the day to day relative readings of the analyzer The results of a Level 2 check must not be used to adjust the analyzers calibration but may indicate the immediate need for a more authoritative Level 1 calibration check 98417600 Rev E 3 31 EC9841 NOx ANALYZER OPERATION MANUAL When used with a certified traceable NO or NO span standard the EC9841 automatic zero span AZS feature may be used to automatically carry out a Level calibration check on a periodic basis Further when the instrume
42. field The second protocol provided is Bavarian The Bavarian protocol should be used with the Bavarian Network Command Set for any Bavarian network applications Note specifying the Bavarian protocol still allows the user to access the 9800 command set The third protocol provided is the enhanced protocol The enhanced protocol provides more robust handshaking environment as specified in section 4 4 3 9 4 4 3 1 Original Protocol This protocol is provided for back compatibility with pervious versions before Version 2 05 of 9800B software There are a number of idiosyncrasies in the original protocol that are preserved to allow existing applications to use upgraded software without modifying their interface 4 4 3 2 Command Acknowledgment o For 9800 style commands that provide a data response the data response itself is the acknowledgment o For 9800 style commands that do not provide a data response the acknowledgment is the returned ASCII string o For Bavarian Network commands no acknowledgment is returned 98417600 Rev E CHAPTER 4 DIGITAL COMMUNICATION 4 4 3 3 Negative Command Acknowledgment o 9800 commands if a valid Instrument I D is received with an invalid command string the message INVALID COMMAND is sent o For Bavarian Network commands no negative command acknowledgment is sent 4 4 3 4 Original Protocol Idiosyncrasies o Block check characters are not checked on Bavarian commands
43. from the displayed value to zero The output then reverts to the original range See Figure 2 30 below for an example of over range on a typical strip chart recorder Figure 2 30 Over Range as Seen on a Strip Chart Recorder 98417600 Rev E CHAPTER 2 INSTALLATION amp OPERATION The range value should generally be set first However because the range value must be less than the currently selected over range value it may be necessary to increase the over range value to the desired setting first The over range value is limited to be equal to or greater than the currently selected range value For practicality it is recommended that the over range be set to a value between 2 and 5 times the range value For example if the desired monitoring range is 0 2 ppm the over range should be set between 0 4 ppm and 1 0 ppm Certain precautions must be taken when over ranging is enabled to ensure that pollutant concentration measurements are reported correctly When a data acquisition must interface with the analog output of the instrument some means must be provided to indicate which range is in effect during all measurements The user should monitor the 50 pin I O connector pin 7 which is an open collector output indicating analog output 1 is in over range 2 6 3 Analog Output Calibration Procedure 98417600 Rev E This procedure is appropriate for connecting the EC9841 analyzer to a strip cart recorder Data logger DAS or to a Digital v
44. identification number I D which is sent with each command from the master When a unit recognizes its unique I D it processes the command and responds appropriately The integrity of this method relies on a strict enforcement of the following rules o Each unit in the multidrop must have a unique I D that is programmed into the unit before attaching to the network 98417600 Rev E CHAPTER 4 DIGITAL COMMUNICATION o After a command is sent by the master the master must then wait for a response Only after a reasonable time out period should the master send another command o The multidrop master must include a time out mechanism in the event that the I D sent with the command is garbled Clearly a lt gt on a bad I D is not possible for the units in this scheme o The master must correlate the unit response with I D sent in the command to know which unit in the multidrop is responding o Any command that would cause two units on the multidrop to respond at the same time must be avoided If more than one unit attempts to respond on the common transmit line a data collision will occur destroying both messages 4 4 4 2 Programming Instrument Identifiers Note The Instrument ID or Main Gas ID can be set manually in the Instrument Menu or the Interface Menu Refer to section 2 5 3 for further details This is this preferred method Alternatively the command is the only command used to set the Instrument I
45. is externally controlled is via the 50 PIN IO connection or via the RS232 multidrop connection Refer to section 4 0 for more details on interfacing to these ports 2 4 3 Manual A manual precision check can be initiated as follows 1 Connect a source of span gas to the analyzer through the Inlet port see chapter 3 0 for instructions on preparing calibration gas 2 From the CALIBRATION MENU set CALIBRATION to MANUAL and CAL MODE to SPAN 3 Allow the analyzer to sample the span gas until a stable reading is obtained typically 15 minutes 4 Verify this stable reading against the know calibration concentration 5 Typically if it is within 5 then a calibration is not required 98417600 Rev E 6 CHAPTER 2 INSTALLATION amp OPERATION If a calibration is required continue with the following procedure in section 3 0 If not return the CAL MODE to MEASURE 2 4 4 Analyzer Calibration Instructions Note This procedure is a quick guide to single point span calibration of the EC9841 analyzer For complete gas preparation and multipoint calibration instructions refer to Chapter 3 Calibration Note Changing instrument between single and dual gain modes is performed within the instrument menu see section 2 5 3 Single Gain procedure 98417600 Rev E With a stable supply of calibration gas NO connected to the Inlet port of the analyzer verify that in the CALIBRATION MENU CALIBRATION is s
46. lt EXT gt 3A The block check calculation is best shown by the following table Character Hex Value Binary Block Check 03 0000 0011 0011 1010 The binary value 0011 1010 corresponds to the hex value 3A This value in ASCII forms the last two characters of the data request message Please note that the I D of 97 is sent as the sequence 097 All I D strings must have 3 digits and the user should always pad with ASCII zero characters This is an example of a valid command to put the unit in the manual span mode if the instrument has an I D of 843 lt STX gt ST843 lt ETX gt 52 The block check operation is best shown with the following table 98417600 Rev E EC9841 NOx ANALYZER OPERATION MANUAL 4 10 Character Hex Value Binary Block Check lt ETX gt 03 0000 0011 0101 0010 The binary block check value is 0101 0010 which is the hex value 52 as shown at the end of the command string 4 4 3 Protocol Definition and Selection There are three protocol selections available for the EC9841 via the INTERFACE MENU These are provided so the user may select the appropriate protocol for their desired application The first protocol designated original should be used when upgrading software in analyzers that are already in serial networks The original protocol is provided for back compatibility as it completely duplicates the protocol already in the
47. permeation tube calibrator devices zero air is manufactured by ambient air scrubber elements integral to the calibrator or provided by some pressurized external source The chemical composition of zero air must be the same for zero span and calibration operations 98417600 Rev E CHAPTER 3 CALIBRATION Note Regardless of the calibration procedure standards must be traceable to NIST Standard Reference Materials SRM Procedures for certifying a working NO cylinder or NO permeation tube are given in section 3 10 below 3 4 3 Preparing the NO Regulator and Delivery System 98417600 Rev E Before connecting the nominal 50 to 100 ppm NO concentration standard to the calibration system purge the regulator and delivery line to prevent back diffusion of O and contaminants into the line If O is allowed to defuse into the tank it will oxidize the NO to NO The following procedure is used to prepare the NO regulator and delivery system 1 Connect an all stainless steel two stage regulator with an output valve to the NO concentration standard The regulator should have never been used or used only on NO Do not open the main cylinder valve Make sure the second stage is off and the output valve is closed 2 Open the main cylinder valve momentarily and close it quickly just allowing the pressure to build up in the first stage of the regulator Adjust the second stage to about 40 psi 3 Use the output valve to vent almost all the
48. procedure outlined in section 3 10 1 2 Note For further information on calibration by GPT and NO permeation devices refer to 50 Chapter 1 Title 40 CFR Appendix F revised December 1 1976 and Reference 13 of that appendix 3 11 Calibration Requirements When Over Ranging Is Employed If you are utilizing the over ranging feature of the analog outputs use the following steps in conjunction with the procedure in section 3 6 or 3 7 to calibrate the instrument 3 30 98417600 Rev E CHAPTER 3 CALIBRATION 1 Choose the desired upper range limit for the normal monitoring range RANGE 2 Choose and set the desired upper range limit for the higher over range OVER RANGE A value between 2 and 5 times the RANGE value is recommended 3 Disable over ranging by setting OVER RANGING to DISABLED 4 Set the RANGE value equal to the OVER RANGE value 5 Check the zero and set the span and converter efficiency as described in section 3 6 or 3 7 6 Generate several concentration standards and determine the slope intercept and linearity of the higher OVER RANGE 7 Reset RANGE to the normal monitoring range 8 Generate several concentration standards and determine the slope intercept and linearity of the RANGE Note Once the span and converter efficiency have been set on the higher range no further adjustments should be made on the lower normal monitoring range 9 Re
49. trennen nennen enne trente trennen 4 13 4 4 Serial Command Seis e eee a eee ipe cete eec aee cede bade beste uaa etes pin 4 16 4 5 USB COMMUNICATION te oer oit e ip ee eI RR DI IE Ie D rs ex iter 4 25 4 5 1 Installing the driver on PC uet eerte ederet le eren det gd enden eet pate ed 4 26 4 6 EC9800 COMMUNICATOR SOFTWARE teen nr enne etre tene tene trennen trennen 4 28 4 6 1 Data Acquire Mode ii e E Ea EA EARE ER eate Eae ELE HERE SETA 4 28 4 6 2 Remot Terminal Mode o a te fetta er eate ee erede pd 4 30 46 3 VENES p 4 31 4 6 4 Keyboard shortcuts EU m ERRARE EP EA EEEE EEE AEE ERR 4 33 INDEX quc II APPENDIX A T A oe II DESCRIPTION II Paix zi np dec VIII 98417600 Rev E EC9841 NOx ANALYZER OPERATION MANUAL This page is intentionally left blank 98417600 Rev E FRONT MATTER Manual History This manual is the combination of two previous versions which have now been merged into one document to cater for the continuing development of the EC9800 series analyzers The original manuals were o 9841 Operation Manual PN 98412026 Rev T September 1998 o ML9841B Operation
50. with any excess flow vented to the atmosphere The EC9841 requires at least 1 00 slpm 0 64 slpm sample plus 50 overflow of particulate filtered lt 5 micron dry noncondensing sample furnished at all times A 5 micron inlet filter is necessary to meet USEPA requirements which is already installed in the A series analyzer Tubing used for sample gas and exhaust connections must be 1 4 inch OD and 1 8 to 3 16 inch ID The recommended ID 15 5 32 inch A segment of clean Teflon tubing should be purchased to connect the sample source to the sample inlet Only use lines and fittings made of stainless steel Teflon Kynar or glass Instructions for tubing connections with Kynar fittings o Cut the tubing squarely and remove any burrs o Insert the tubing through the back of the nut until it reaches the tube stop in the fitting o Tighten the nut finger tight plus 1 1 2 to 2 turns A squeaking sound when tightening the nut is normal o All nuts should be re tightened when the system reaches operating temperature 2 1 2 3 Exhaust Connections Connect the exhaust port of the analyzer to vacuum pump capable of 1 slpm at 20 Hg 67 kPa vacuum minimum capacity The pump must be connected through a charcoal exhaust scrubber to remove excess ozone and prevent damage 2 6 98417600 Rev E CHAPTER 2 INSTALLATION amp OPERATION to the pump The exhaust of the pump should be connected to a manifold to vent the exhaust gas away fr
51. zero adjustment correction factor that is displayed Press lt Enter gt to confirm your setting 6 Select FULL SCALE and adjust the analog output to 100 on the recorder paper or DAS To make this adjustment watch the recorder paper or DAS while you increment or decrement the full scale correction factor that is displayed Press lt Enter gt to confirm your setting 7 Select OVER RANGE and set to a range that is higher than the RANGE chosen at the top of the screen When the digits reflect the desired over range press lt Enter gt 8 Select OVER RANGING and choose either ENABLED or DISABLED Press lt Enter gt 2 6 4 Calibration Requirements To make your data acceptable to the regulatory authorities and to pass required periodic audits you must calibrate the instrument before any data is collected for use in a monitoring program The calibration procedure is included in Chapter 3 of this manual Most regulatory requirements also include establishing a calibration verification program If your organization does not have the staff to perform this task Ecotech s Service personnel can provide assistance See the front of this manual for contact details 2 7 Password Protection 2 42 A password protection option was designed in order to solve the problem of altering the configuration of the machine by the user This option prevents the user from configuring the EC9800 menus by creating an indivi
52. 3 Onthe Comm menu select Start 4 The screen should replicate the analyzer s display similar to Figure 4 8 The user now has access to the analyzer control panel with the buttons at the bottom of the screen replicating the buttons on the front panel of the analyzer If a blank screen appears terminate the connection as per step 2 below and reconnect 9800 Data Downloader E 0 x Comm Mode x e P d A 4 M L Select 4 Po Up 4 bit L Connected com Figure 4 8 Remote Terminal 4 30 98417600 Rev E CHAPTER 4 DIGITAL COMMUNICATION 4 6 2 2 Ending a Remote Terminal mode session Controlling the analyzer by remote terminal automatically sets the analyzer to Remote mode Note It is advisable that the user always returns the analyzer to Command mode at the end of the remote terminal session so that other users may download data To end the remote terminal session 1 Set the Interface Mode option on the Interface Menu to Command For detailed instructions on how to do this see section 4 6 2 3 2 Terminate the connection by selecting the Stop option on the Comm menu 4 6 2 3 Setting the analyzer to Command mode during a Remote Terminal session 1 Click exit repeatedly to display the analyzer s start up window Main Menu should be highlighted 2 Click enter to enter the Main Menu 3 Click up or down until Interface Menu is highlighted 4 Click enter to enter the Interface Menu 5 Click up or dow
53. 34 Ground reference for digital inputs or outputs 49 Chassis ground 50 12V 50 mA maximum 3 4 Unused 4 3 EC9841 NOx ANALYZER OPERATION MANUAL 4 1 1 1 Notes 1 Allo utputs are open collector active LOW 2 Analog output 3 is NO 3 Analog output 1 is NO 4 Analog output 2 is NO 5 Not valid 6 Not used 7 Not valid 8 Span ratio out of range is defined as calibration gain changing below 75 or above 125 gain change 9 An error is flagged if the iso flow block temperature is below 35 or above 60 C or if the reaction cell temperature is below 35 C or above 60 C or if the converter temperature is below 220 C or above 340 C 10 An error is flagged if the 12 volt supply voltage is below 11 1 volts or greater than 14 3 volts 11 An error is flagged if the high voltage reading differs by more than 25 of the expected value as determined from the high voltage pot setting 12 This COOL signal is the logical OR of FLOWFAIL LAMPFAIL CHOPFAIL CVFAIL ERFAIL HEATERFAIL REFFAIL PS FAIL and HV FAIL 4 1 2 50 Pin 1 0 Inputs The ERO and DOSPAN controls pins 5 and 6 are TTL compatible inputs with internal 4 7K ohm pull up resistors These inputs are active low and can be driven to ground by dry contact relays open collectors or TTL compatible ICs The logic levels for control inputs are standard TTL levels They are low 0 8 V 2V hig
54. 4 Go to the INSTRUMENT ENU select the M NO filter CHAPTER 3 CALIBRATION EASURE ME iNT ENU and disable the 5 Adjust the GPT calibration system O generator and dilution air flow rates as specified in section 3 8 6 The total air flow must exceed the total demand of the analyzer s connected to the output manifold by 50 to ensure that no ambient air is pulled into the manifold vent during calibration Figure 3 1 Typical GPT Calibration System Schematic 6 Go to the CALIBRATION Mi ENU and select MANUAL calibration and MEASURE mode Check to be sure that instrument parameters are set to the values specified in Chapter 1 Exit and return to the primary screen 3 6 2 Zero Measurement 1 Allow the analyzer to sample zero air for 30 minutes or until the NO NO and NO readings drift by no more than 1 of their full scale ranges during a 10 minute period 98417600 Rev E Note 3 9 EC9841 NOx ANALYZER OPERATION MANUAL The auto zero function of the EC9841 eliminates the need for a traditional zero calibration 2 Record the final stable zero air responses as Zo and 3 6 3 Span Adjustment 1 Adjust the NO flow from the standard NO cylinder to generate an NO concentration of approximately 80 of the full scale NO range of the analyzer Note It is imperative that all contaminants be removed from the NO pressure regulator and delivery systems
55. 655 4 653 14 23 15 AUG 05 Figure 2 7 Primary Screen When power is applied the screen displays the Ecotech logo for a few seconds It then identifies the analyzer and the notation MAIN MENU appears in the lower right corner In the lower left hand corner there is the Ecotech Globe rotating indicating that the program is running After the warmup period the operation mode is designated at the left of the screen and the current gas measurements for the analyzer are indicated as shown in Figure 2 7 Instrument faults will be reported on the status line which appears one line below the instrument state display The following rules govern the information displayed on this line If there are no failures the status line is blank If there is a single failure that failure is displayed on the status line 1 ZERO FLOW HEATER FAULT etc The status line will clear when the fault clears If there are multiple failures the failure at the top of the failure list will be displayed on the status line When this failure clears the next failure on the list will be displayed The entire list of failures is displayed on the SYSTEM FAULTS screen The NO analyzer can be used with either one or two instrument gains The single instrument gain is the only mode that is U S EPA approved Instrument gains displayed above the operational mode indicates the relationship between the calibration concentration and a measured gas concentr
56. A 1 2 1 1 3 Lower Detectable 14 1 2 Zero DIE o a pe edu t en tb eee 1 2 TI 5 SPAN Driftzs sic erae a oce eta ete e pee mee Dee perde tute 1 2 JS FO TORTE 1 3 1 1 7 Rise Fall Time 95 of Final Value 1 3 LS Lmearity ELTON E ARENE SERNER 1 3 A E EA mc tei 1 3 TLIO Sample Flow R te s ie RR pte qi EO pipe grs 1 3 ILIISamplePressure Dependence eyed tue pte dete ene ez Rie tee e Paus 1 3 LE I2 Temperature Range epe teo Mash epe ege ie eque tetra tite detegere 1 3 TAG TBP OWE 1 3 VISA ADIT AE EE 1 3 Lid DD Anclog OUutpul se coos side t e e dei He HU sede eR e PE ERR ordi tad 1 3 J I I6 Digital OUtp t iii duae RE GRE TUE EET RE ERE 1 4 1 2 U S EPA REFERENCE METHOD ccccssseceessscecsessccecssseeceesccecsessececssaaececuneecsesaeseceesaececeasecsesaeseceesaeeeseeaaesess 1 4 2 0 INSTALLATION AND OPERATION ccssscsssssssssssssscssscsssecsssscssssscsssssnsssssssssnsssssssssnessssssscsssssssssossossasees 2 1 2 1 MECHANICAL INSTALLATION pere bee ea e eR dea te ale aes Aes et 2 1 2 IsSelecting a Doc tionss ii e ea e te etr eet ee E 2 1 Zu RIA CORHOCTIIORS sa RE RUOTE TRO UNI 2 I 2 2 AG POWER CONNECTIONS ii bene visus tea Ee 2 7 2 241
57. AMPFAIL HEATERFAIL OUT OF SERVICE SPANON FLOWFAIL COOLERFAIL HV FAIL SYSFAIL CVFAIL PS FAIL CHOPFAIL Indicates that the chopper has failed LAMPFAIL Indicates that the lamp has failed FLOWFAIL Indicates that the sample flow is less than 0 1 slpm SYSFAIL Indicates one or more components have failed HEATERFAIL Indicates that a system heater has failed COOLERFAIL Indicates that a cooler has failed CVFAIL Indicates that a converter has failed ZEROON Indicates that the instrument is in the Zero mode 98417600 Rev E CHAPTER 4 DIGITAL COMMUNICATION OUT OF SERVICE Out of service switch has been activated on analyzer HV FAIL Indicates that the PMT high voltage supply has failed PS FAIL Indicates that the 12 volt supply voltage has gone out of range GRAV Measuring in gravimetric units i e MG M3 VOL Measuring in volumetric units i e PPM Example If a failure status is received as C022 then the failures of the instrument as determined by this code are C FLOWFAIL Indicates that the sample flow is less than 0 1 slpm SYSFAIL Indicates one or more components have failed 0 No Failure
58. CURRENT OUTPUT is selected 98417600 Rev E 2 31 EC9841 NOx ANALYZER OPERATION MANUAL RANGE Sets the upper range limit of concentration in digits that will be measured by the instrument See section 2 6 3 This value cannot exceed the OVER RANGE value OUTPUT TYPE Setting must match the choice on the 50 Pin I O board if installed current or voltage CURRENT RANGE Choices are 0 20 MA 2 20 MA and 4 20 MA FULL SCALE X XX a correction factor for full scale setting Used when calibrating the analog outputs ZERO ADJUST X XX a correction factor for the zero setting Used when calibrating the analog outputs OVER RANGE Set to desired over range value This value cannot be set below the RANGE value See section 2 6 3 This is the alternate scale the recorder or DAS indicates when over ranging is active and enabled When 90 of the set range is reached this auto range is effective When 80 of the original range is reached it returns to the original range OVER RANGING Set to ENABLED Or DISABLED to turn the over ranging feature on or off 2 5 14 2 NO NO NO2 Output Menu Voltage NO OUTPUT MENU RANGE 0 500 PPM OUTPUT TYPE VOLTAGE OFFSET 0 FULL SCALE 0 00 ZERO ADJUST 0 00 OVER RANGE 20 00 PPM OVER RANGING DISABLED Figure 2 22 Analog Output Menu Voltage The above menu will be displayed whenever VOLTAGE OUTPUT is selected 2 32 98417600 Rev E CHAPT
59. Closed Figure 4 7 Acquired Data completion screenshot The same data is displayed in the output text file as set on the Output tab of the Settings dialog box with the fields delimited by commas A description of each field follows below Field On screen In text file Date Time The date time in the format selected in the Output tab of the Settings dialog box when the data in that row were recorded As for on screen Data Up to three channels of analyzer data with column headings as set by the analyzer As for on screen 4 29 EC9841 NOx ANALYZER OPERATION MANUAL Unit The unit for the analyzer data Codes representing the data units Period The repetition period For As for on screen with averaged data the repetition the period in minutes period is also the averaging period Function The function status of the analyzer As for on screen status at the time of measurement Failure The failure status of the analyzer As for on screen status at the time of measurement Type Inst instantaneous data I instantaneous data Avg averaged data A averaged data 4 6 2 Remote Terminal Mode Remote Terminal mode can be used to access the analyzer s control panel remotely 4 6 2 1 Starting a Remote Terminal mode session 1 Ensure that all Settings are correct Refer to section 4 6 3 2 Under Mode menu choose the Remote Terminal option
60. DURE ALTERNATIVE A NO CONCENTRATION STANDARD AND 3 8 3 61 Preparation e EE REEL er XR PEU hands dada tg AERE e Eo E c Re i olde tuse EE de RE 3 6 SiO 2 ZETO Measurement dE 3 9 3 0 3 Span Adjusttnent a etr E PEOR IU Re DIR eR cn Read reser 3 10 3 6 4 Preliminary Converter Efficiency Check eese nennen nene eene rennen nenne 3 11 3 6 5 Preparation of the NO and NOx Calibration Curves esee 3 12 3 6 6 Preparation of the Calibration Curve eese eene ener trennen enne 3 13 3 6 7 Final Converter Efficiency Check eee eese eee teinte ethernet enne ennt nre enne 3 14 3 7 MULTIPOINT CALIBRATION PROCEDURE ALTERNATIVE B NO PERMEATION DEVICE eee 3 14 3 8 GUIDELINES FOR CALIBRATION USING GPT en ennemis 3 16 3 0 E Pfincipl s i i A 3 16 3 6 2 Preliminary GPT Design 3 16 3 6 3 Major Equipment Required ccccccscccscteidiseviesesecdesasesvesseabesbssastsevieeusoebsodnassesevigeedsouds a VEEE COANA ESEE EAS 3 17 3 6 4 System Setup c oe REOR ED RR e DER ME RD e AREE EN IURE hoe NR anh 3 17 2 0 9 REGS CNIS cds etsi ete o bre dete e ye dere tere E 3 18 3 6 6 Dynamic Parameter Specifications eee 3 20 3 8 7 Dete
61. E EI ERREUR EG TERR E EU 3 36 4 0 DIGITAL COMMUNICATION sassoni siose soeone os snos ressas 4 1 4A DISCRETE CONTROL icd tee ER RERO STREET et epe VE RAS SERRE YEN Re S d ERE RENE R E E AE ETAN 4 1 4 1 1 50 Pin Functional Specification eee eese eene nnne enne enne ener tneen nenne nnne 4 1 AT 2 SO Pint YO e UR Shae pak opty ose Rae aS ak dp Bau qe 4 4 4 1 3 SO0 P in VO Outputs cose sss i eie oU ch events RT Re a Rte eles eee ee venere 4 4 4 2 SERIAL CONTROL i tuts os eR itr e eee Pa EUER bebe EOS s Pe NAR ov bel eie exe es ee YIN 4 5 4 2 1 Serial Connections assiettes idee redd oe ee 4 5 4 2 2 Cable Connections eee eene ener entente intent eese n rese eese E e rese n ense erre nnns essen 4 6 AS SERIAL TERMINAE 4 4 e fe e eee ded erede eati esu ente eee ce eee e e e etel des 4 6 4 4 SERIAL COMMAND CONTROL eds doeet ert ers re ele rte tede deserere Puede sedie dese vete ete eee ede epe ee 4 7 4 4 1 9800 Command Set Format eese esee en nennen tene sereni enn ese en tense nenne inneren 4 7 4 4 2 Bavarian Network Command Set 4 6 4 4 3 Protocol Definition and Selection sssrinin rarai nineio enne iaar 4 10 4 4 4 Establishing Communications eee eese esent ennt tenente
62. ED does not require certification of the span gas used during AZS and the result of such a check may not be used to correct the data but merely serves to indicate that the analyzer is functioning properly If the AZS is used for Level 2 span checks the SPAN comP must be set to DISABLED A Level2 AZS cycle should be initiated immediately after multipoint calibration so that a valid reference point can be determined 98417600 Rev E 3 33 EC9841 NOx ANALYZER OPERATION MANUAL Unlike some of the other EC9800 series instruments the EC9841 does not have the Internal option for AZS cycles The external valve option must be installed to perform the AZS function With that option installed the outlet of the EZS valve module is connected with a short piece of tubing to the inlet of the analyzer see Figure 2 5 The user must supply the span gas and the zero gas to the corresponding ports on the EZS valve module Figure 2 5 The gases must be supplied to the analyzer at atmospheric pressure for example through a manifold as shown in Figure 3 1 or Figure 3 2 It is possible to do automatic compensation with both NO and NO However there is only one span port available on the EZS valve manifold This means that any mixing of NO and NO must be done prior to the inlet of the analyzer You may use premixed bottles of gas or the mixing may be accomplished in a glass or Teflon flask with sufficient volume and turbulence to assure uniform mixing Th
63. ER 2 INSTALLATION amp OPERATION RANGE Sets the upper range limit of concentration in digits that will be measured by the instrument See section 2 6 3 This value cannot exceed the OVER RANGE value OUTPUT TYPE Setting must match the choice on the 50 Pin I O board if installed current or voltage OFFSET Used to offset recorded zero Choices are 02 52 or 10 oo FULL SCALE X XX a correction factor for full scale setting Used when calibrating the analog outputs ZERO ADJUST X XX a correction factor for the zero setting Used when calibrating the analog outputs OVER RANGE Set to desired OVER RANGE value This value cannot be set below the RANGE value See section 2 6 below This is the alternate scale the recorder or DAS indicates when over ranging is active and enabled When 90 of the set range is reached this auto range is effective When 80 of the original range is reached it returns to the original range OVER RANGING Set to ENABLED Or DISABLED to turn the over ranging feature on or off 2 5 15 Data Logging Menu DATA LOGGING MENU AVERAGE DATA OFF INST DATA OFF TOTAL CAPACITY 0 0 DAYS ERASE LOGGED DATA NO Figure 2 23 Data Logging Menu 98417600 Rev E 2 33 EC9841 NOx ANALYZER OPERATION MANUAL The DATA LOGGING MENU contains settings that relate to the internal data recording facilities of the EC9841 This data can latter be retrieved using the Ec
64. HAPTER 4 DIGITAL COMMUNICATION Protocol enhanced eee 4 12 Protocol original sss 4 10 R Recorder connections 2 2 S Sample gas 2 6 Serial command control esee 4 7 Serial 4 5 Serial control cccccccecssscccssececeessececsesseeeesssseeees 4 5 Seral POL nennen ees 2 26 4 7 Serial terminal control eses 4 6 Setting the date and time sess 2 11 Standards calibration 3 26 Status Output Connections illustration 4 5 Strip Charts Illustrating Offset illustration 2 37 System Faults screen sese 2 35 System Faults Screen illustration 2 35 System Temperatures screen 2 34 System Temperatures Screen illustration 2 34 T Terminal control serial esseees 4 6 Test Menu ueterem iet EIER 2 23 Test Menu illustration eseeeeee 2 23 Timed Calibration Menu esee 2 21 Timed Calibration Menu illustration 2 21 Typical GPT Calibration System Schematic llustration sensein rei i enne 3 8 U U S EPA Reference 1 4 USB
65. MANUAL 2 3 7 Output Test Menus ia aed E eater RAUS ote ed 2 26 2 9 8 Preprocessor Pots Menu ea dee ie eet e e TREE SURE DETERIUS 2 26 VINE B ATA AT H 2 27 2 5 10 Diagnostic Menu iie oit ier ted inte t t eleg te e Era eb eie ree er o onda 2 28 2 9 HCalculationf clorss te ete e eei e pete e e eet i 2 29 2 29 12 Interface Menu i i Avec ter tee bigs eet nte aet eus E cobs eee ode Peau espe eee ede 2 30 25 13 Analog Output er aum reti gere ue iba er Ea EEE a leone 2 31 2 5 14 NO NO JNO Output 2 31 23 13 Data Eoeeing Menu is ve at a rt e rc e er Ue D 2 33 2 946 Network Adaptor Menu ot eo et b e Ba R a A 2 34 Zo Trend Select Mentor et te tee d des ee tee Bs ROE IEE ER ES 2 35 2 23 18 Event Log Screens ias cs e eR er d e d d e RR ERR EC ea ETUR 2 35 2 5 19 Instrument Status Screenin iii AE piii Eaa o oeio des GISI r es Aiei ees 2 36 2 5 20 System Temperatures Screen eese sees eene netten nennen nennen enne 2 37 2 5 21 System Faults Screen t ei eee RAE RETE EE SAES ESETT R 2 38 2 6 ANALOG OUTPUT eei rone date dee ptt aem e nie eee 2 39 2 6 1 Offset and EiVe ZerQa 5 e d I EAEE PUE NE PER EU AUGERE 2 39 2 6 2 Over Range Adjustment eee eee eee esent eene enne ea eaa 2 40 2 6 3 Analog Output Ca
66. N MANUAL 4 20 Bit 1 SETPPM selected CLEAR gt MG M3 Bit O LSB reserved Command DEVENT Function Dumps the Event Log message buffer to the serial port Format DEVENT lt DEVICE I D gt TERMINATOR Device response XX Message XX lt CR gt lt LF gt OCCURRED AT HH MM DD MON YY lt CR gt lt LF gt The last 100 messages are reported xx is the index into the event log message buffer 99 oldest point reported first 0 newest point reported last The message field is null if no message exists Command DGAIN Function Dumps gain data Format DGAIN DEVICE I D gt TERMINATOR Device response INSTRUMENT GAIN ZERO OFFSET lt CR gt lt LF gt Command DINSTR Function Dumps INSTRUMENT STATUS MENU 98417600 Rev E 98417600 Rev E CHAPTER 4 DIGITAL COMMUNICATION Format DINSTR lt DEVICE I D gt TERMINATOR Device response STAT1 STAT2 STAT3 STAT4 STAT5 STAT6 STAT7 STATS STAT9 STAT10 STAT11 STAT12 lt CR gt lt LF gt where STAT1 gas flow STAT2 gas pressure STAT3 reference voltage STAT4 concentration voltage STAT5 analog supply STAT6 digital supply STAT7 ground offset STAT8 ozone generator flow STAT9 high voltage STAT1O lamp current mA STAT11 ambient pressure STAT12 Startup flag 1 in startup mode
67. NU MULTIDROP PORT TEST NO WATCHDOG TEST NO DISPLAY TEST NO ANALOG OUTPUT TEST NO Figure 2 17 Diagnostic Menu The DIAGNOSTIC MENU is information used to diagnose problems or suspected problems The settings return to the previously set conditions when the operator leaves this menu MULTIDROP PORT TEST Sends test of all printable characters to the Multidrop rear serial ports WATCHDOG TEST Disables strobes to executed 2 28 the watchdog timer The system resets when this test is 98417600 Rev E 2 5 11 98417600 Rev E CHAPTER 2 INSTALLATION amp OPERATION DISPLAY TEST A series of 6 tests are available to check the working order of the display screen Once the test is selected press the lt Select gt key to verify that the alternate pixels are visible Press the lt Pg Up gt key to exit The available tests are STRIPE 1 Causes the screen to show a series of very closely spaced vertical lines STRIPE 2 Shows a series of vertical lines in alternate positions to those is STRIPE CLEAR Clears the screen of all pixels FILL Fills the screen of pixels CHECK 1 Causes the screen to show a checkered pattern made up of single pixels CHECK 2 Displays a checkered pattern in alternate spaces to CHECK 1 ANALOG OUTPUT TEST Sends a 0 1 Hz sawtooth waveform to the selected analog output device to test its functionality There are 6 analog outputs to choose from 1 to 6 Analog outputs 1 to
68. R switch on the front secondary panel is switched to ON 2 2 1 Display Adjustments Adjust the display contrast by simultaneously pressing two keys on the front panel see Figure 2 4 below 1 DISPLAY 5 INSTRUMENT IDENTIFICATION 4 RACK MOUNT OPTION 2 Figure 2 4 Analyzer Front Panel a Contrast Up arrow A and Select for darker contrast Down arrow Y and Select for lighter contrast o Backlight The backlight brightness is fixed to maximum and cannot be adjusted Hold the key combinations until the desired contrast appears on the display Note Pressing the Up or Down arrow key while not simultaneously pressing the Select key when the main screen is displayed causes the screen query START MANUAL CALIBRATION If this happens while adjusting the display press the lt Exit gt key Note The display is sensitive to the ambient air temperature and analyzer temperature The appearance of the display will vary with changes in these conditions 2 8 98417600 Rev E CHAPTER 2 INSTALLATION amp OPERATION 2 2 2 Warmup When the instrument is initially powered up several components in the instrument are required to reach operating temperature before the analyzer will begin operation This process typically requires about 60 minutes from a cold condition During the startup period the message START UP SEQUENCE ACTIVE will be displayed This indicates progression toward normal operation Initial Scr
69. RMINATOR Device response lt ACK gt Command GETDATA Function Used to collect logged data from an analyzer Format This command takes two different formats depending on the transmission state TO begin with the following format must be used 98417600 Rev E CHAPTER 4 DIGITAL COMMUNICATION GETDATA DEVICE I D gt 2 1 lt START TIME gt lt END TIME gt lt DATA TYPE gt TERMINATOR Where START TIME is the date time of the first piece of data to collect and END TIME is the date time of the final data to collect Both must be in the following format YY MM DD SPACE HH NN If END TIME is omitted then all data since START TIME is returned Year must be 03 or greater Where DATA TYPE I to only receive instantaneous logged data A to only receive Averaged logged data EMPTY to receive both instantaneous and averaged logged data After the request has been issued data will be returned in the same packet format as is documented for USB data requests After each packet the following com mand should be issued to request the next packet of data GETDATA DEVICE I D gt 2 1 lt REQUEST gt TERMINATOR Where REQUEST 0 to retransmit previous packet logged data 1 to transmit next block of packet data Device response Refer to command 2 in the USB protocol specification The complete USB packet format is used for the response to this serial command 4 5 USB Communication
70. Startup flag and ground offset are integers all other numbers are in floating point format The status field is null if it does not apply to the analyzer type Command DSPAN Function Commands the unit under test to enter the span mode and stay there Format DSPAN DEVICE I D gt TERMINATOR Device response lt ACK gt if the unit under test is able to perform the command lt NAK gt if not Command DTEMPS Function Dumps SYSTEM TEMPERATURES MENU Format DTEMPS lt DEVICE I D gt TERMINATOR 4 21 EC9841 NOx ANALYZER OPERATION MANUAL 4 22 Device response TEMP1 2 TEMP3 TEMP4 TEMP5 TEMP6 TEMP7 TEMP8 TEMP9 TEMP10 lt CR gt lt LF gt where TEMP1 cell temperature TEMP2 converter temperature TEMP3 chassis temperature TEMP4 flow temperature TEMP5 cooler temperature TEMP6 mirror temperature TEMP7 lamp temperature TEMP8 ozone generator lamp temperature TEMP9 IZS temperature TEMP10 manifold temperature All temperatures are in floating point format The temperature field is null if it does not apply to the analyzer type Command DTREND Function Dumps the requested trend buffer to the serial port Format DTREND lt DEVICE I D gt 1 1 lt PARAMETER gt TERMINATOR where PARAMETER GASCONC f
71. T calibration procedure section 3 6 7 above The converter efficiency must be 96 or greater if it isn t replace the converter 4 Set up an NO permeation system as shown in Figure 3 2 and discussed in section 3 9 below 5 Generate an NO concentration of approximately 80 of the full scale NO range Calculate the exact NO concentration from the following equation Figure 3 2 Calibration Apparatus with NO Permeation Tube RxK NO _ INO los Equation 3 0 6 where NO our diluted NO concentration at the output manifold in ppm NO permeation rate ug min 0 532 ul NO ug NO at 25 C and 760 torr 101 kPa 98417600 Rev E 3 15 EC9841 NOx ANALYZER OPERATION MANUAL F air flow rate across permeation tube corrected to 25 C and 760 torr 101 kPa slpm F dilution air flow rate corrected to 25 C and 760 torr 101 kPa slpm 6 Set the span of the analyzer as described in the GPT calibration procedure by adjusting the NO span value NO concentration field to agree with the NO concentration generated with the permeation tube Record the NO response and calculated NO concentration 7 Generate five additional NO concentrations at equally spaced intervals Record the analyzer NO response and calculated NO concentration for each calibration point 8 Plot the analyzer NO responses versus the corresponding NO concentrations and construct the NO calibra
72. Use of a Level 1 span check with SPAN COMP ENABLED adjusts the instrument gains so the output of the instrument agrees with the concentration expected for the span gas The previously determined multipoint calibration curve is used to verify that the analyzer output is linear Note The zero value is a reference value only Regardless of the state of the SPAN option the analyzer does not correct for shifts in the zero Note A Level 1 span calibration requires external zero and span standards connected via the optional EZS valve assembly It is recommended that the NO or NO source be checked against the instrument s previous calibration curve immediately after the generation of the calibration curve see Section 12 of the Q A Handbook for Air Pollution Measurement Systems It is also recommended that the concentration of this pollutant source be between 70 and 90 of the upper range limit of the analyzer and previous calibration curve Subsequent use of this pollutant source with AZS and compensation ENABLED adjusts the span of the instrument to agree with the previous calibration line Specific guidelines are contained Calibration Refer ence for use of Level 1 span checks Section 12 and certification of gas or permeation devices to SRM CRM sources Section 12 Note Use of SPAN COMP ENABLED is not allowed under U S EPA designation at this time A Level 2 span check with SPAN COMP DISABL
73. a fixed series of choices in a wraparound scrolling format Digit fields Fields of programmable digital parameters in either wraparound scrolling or non wraparound scrolling format To select from among the choices in a choice field first press the Select key to designate the field then use the Up and Down arrow keys to highlight the desired selection When the desired selection is displayed press the Enter key to confirm the entry To set digits in a digit field first press the Select key to designate the field and to highlight the different digits in the field When the cursor indicates the digit you wish to change press the Up or Down arrow key until the desired digit appears Go to the next digit by pressing Select When all digits of an entry are correct press the Enter key to confirm the entry Caution The Select key does not confirm an entry You must press the Enter key 2 3 2 2 Microprocessor Generated Information Some fields such as those on the INSTRUMENT STATUS and SYSTEM TEMPERATURES screens contain information generated by the microprocessor The operator cannot affect the readings in these fields If you find that the cursor will not enter a field the field contains microprocessor generated information 2 3 2 3 Exiting Without Making a Change If you decide not to make a change during this process simply press the Exit key and the values will return to
74. ace Center Photo Reference ISS006 E 19897 Notice The information contained in this manual is subject to change without notice and does not represent a commitment on the part of the Ecotech Pty Ltd Ecotech reserves the right to make changes in construction design specifications and or procedures that may not be reflected in this manual Copyright 2007 All rights reserved Reproduction in any form is prohibited without the written consent of Ecotech Pty Ltd This manual is furnished on the express condition that the information herein will not be used for second source procurement or purposes directly or indirectly detrimental to the interests of Ecotech 98417600 Rev E FRONT MATTER MARK DECLARATION Declaration of Conformity Nitrogen Oxides Analyzer Scope of Declaration This declaration applies to Nitrogen Oxides Analyzers as manufactured by Ecotech P L and which may be sold in the following configurations Part Number Description 98413000 104 Nitrogen Oxides Analyzer A series with and without internal 98417000 T pump 98417000 1 Nitrogen Oxides Analyzer Trace 98415200 100 Nitrogen Oxides Analyzer B series 98417000 2 Nitrogen Oxides Analyzer High Level Nitrogen Oxides Analyzer with IZS Ecotech certifies that this product operates in compliance with the following standards EN 61326 1 Electrical Equipment for measurement control and laboratory use EMC Requirements Edition 1 1 with amendment 1 plus am
75. alculated converter efficiency in and press Enter 11 Press Pg Up or Exit to leave the calibration routine 3 6 5 Preparation of the NO and NO Calibration Curves 1 Turn off the O generator in the GPT calibration system 2 Generate several additional NO NO concentrations at least five evenly spaced points by decreasing the NO flow rate or increasing the dilution air flow rate varying the dilution flow is recommended 3 12 98417600 Rev E CHAPTER 3 CALIBRATION 3 For each concentration generated calculate the exact NO and NO concentrations using Equation 3 0 1 and Equation 3 0 2 Record the analyzer s NO and NO responses 4 Plot the analyzers NO and NO responses versus the corresponding calculated NO and NO concentrations and construct the NO and NO calibration curves If desired compute calibration relationships for both the NO and NO channels Note For subsequent calibrations where linearity can be assumed a two point calibration zero air point and NO NO span point may be used 3 6 6 Preparation of the NO Calibration Curve 1 Adjust the GPT calibration system O generator air and dilution air flow rates as determined in step 5 of 3 6 1 Preparation 2 Adjust the NO flow rate to generate an NO concentration of approximately 90 of the full scale NO range When the analyzer responses have stabilized record the NO reading as NO opic 3 Turn on the O generator in the GPT
76. alibrate the analyzer against the calibrating source Multipoint calibration is used to establish the relationship between analyzer response and pollutant concentration over the analyzer s full scale range Zero and span checks are frequently used to provide a two point calibration or an indication of analyzer stability and function Regulations generally require that the analyzer be recalibrated anytime it is moved serviced or whenever the analyzer characteristics may have changed This includes changing the instruments units from volumetric to gravimetric Regulatory agencies establish the time intervals at which the analyzer must be calibrated to ensure satisfactory data for their purposes Important Use of the EC9841 analyzer as a U S EPA designated reference method requires periodic multipoint calibration in accordance with the procedure described below In addition the instrument must be set to the parameters indicated in Chapter 1 Introduction 3 1 EC9841 NOx ANALYZER OPERATION MANUAL 3 2 3 1 1 Analyzer Calibration Instructions Note This procedure is a quick guide to single point span calibration of the EC9841 analyzer intended for operators who are familiar with gas analyzers and preparation of calibration gas For complete gas preparation and multipoint calibration instructions refer to section 3 2 below Note Changing instrument between single and dual gain modes is performed within the instrument menu see sect
77. ations within the analyzer 98417600 Rev E 2 17 EC9841 NOx ANALYZER OPERATION MANUAL 2 18 It is an essential parameter for the calibration of the analyzer and is an important requirement for system audits The single gain option contains one instrument gain for the NOx channel The Dual gain instrument contains two instrument gains one for the NO channel left and another for the NO channel right When the primary screen is displayed and the cursor highlights the words MAIN MENU press lt Select gt or lt Enter gt to go to the MAIN MENU 2 5 2 Main Menu MAIN MENU INSTRUMENT MENU CALIBRATION MENU TEST MENU INTERFACE MENU TREND SELECT MENU EVENT LOG INSTRUMENT STATUS SYSTEM TEMPERATURES SYSTEM FAULTS Figure 2 8 Main Menu Each of the menus listed in Figure 2 8 above except the final four has one or more levels of menu items contained within the selection The EVENT LOG is a log created by the microprocessor to indicate deviations in the operating parameters This screen can be used to determine the cause of system problems The INSTRUMENT STATUS and SYSTEM TEMPERATURES screens constantly update readings that apply to the operation of the instrument The SYSTEM FAULTS screen provides a pass or fail indication for various parameters that are continually monitored These parameters must be within acceptable operating ranges in order to display PAss 98417600 Rev E
78. ative will assign a Return Material Authorization RMA number to your shipment and initiate the necessary paperwork to process your equipment as soon as it reaches us Please include this RMA number when you return equipment preferably both inside and outside the shipping container This will ensure that your equipment receives the most prompt attention possible Jf the RMA number is not marked on the outside of the shipping container the shipment will be rejected when it reaches our facility and returned at your expense Your assistance in this matter will enable us to serve you better We appreciate your cooperation and support of our products and services 98417600 Rev E FRONT MATTER Claims for Damaged Shipments and Shipping Discrepancies Damaged Shipment 1 Inspect all instruments thoroughly on receipt Check material in the container s against the enclosed packing list If the contents are damaged and or the instrument fails to operate properly notify the carrier and Ecotech immediately 2 The following documents are necessary to support claims Original freight bill and bill of lading Original invoice or photocopy of original invoice Copy of packing list Photographs of damaged equipment and container ao Tf You may want to keep a copy of these documents for your records also Refer to the instrument name model number serial number sales order number and your purchase order number on all claims Upon receipt of a
79. ature controlled glass container with entrance and exit ports at opposite ends A glass thermometer accurate to 0 05 C can be placed beside the device to monitor its temperature A small fixed zero air or nitrogen flow about 0 1 slpm maintained at the same temperature as the permeation device flushes the NO out of the device housing into a mixing chamber where the NO is diluted with clean dry zero air A valve a three way stopcock for example placed at the exit of the device housing may be used to divert the NO stream to a vent when zero air is required at the mani fold for making the necessary zero adjustments to the analyzer To maintain the temperature of the permeation device within 0 1 C of the desired value the device and housing may be placed inside a constant temperature chamber as in Figure 3 2 or outside the constant temperature chamber with the heat transfer medium circulated around the device housing a West or Liebig type jacketed condenser for example The flushing zero air or nitrogen passes through a heat exchanger e g a coil of copper tubing in the constant temper ature chamber before passing over the device to adjust its temperature to that of the device For a calibration system to be used in a laboratory or other permanent location a circulating water bath makes an excellent constant temperature chamber Many circulating water baths are capable of temperature control to 0 1 C over a suit able temperatur
80. be impractical for the desired system select a reaction chamber having a different Vgc and recompute F and Fp Note A dynamic parameter lower than 2 75 ppm minutes can be used if it can be determined empirically that quantitative reaction of O with NO occurs A procedure for making this determination as well as a more detailed discussion of the above requirements and other related considerations is given in EPA 600 4 75 003 3 8 7 Determining NO Impurity in the NO Cylinder Also see section 3 10 below 1 Generate a known concentration of NO from the NO standard 2 Set the span of the NO reading to agree with the NO level generated 3 Note the NO reading The NO impurity is given by NO lmp NO x F Fyo provided that the molycon efficiency is 96 or better 3 8 8 Helpful Formulas for Calibration by GPT The NO concentration produced by the dilution system in section 3 6 above can be derived from Po NOI y Equation 3 0 14 where NO our diluted NO concentration at the output manifold in ppm Fyo NO flow rate in slpm NO p concentration of the undiluted NO standard in ppm total flow in slpm 1 The exact NO concentration is calculated from 3 22 98417600 Rev E CHAPTER 3 CALIBRATION F x INO NO NO Jour NO E 2 T Equation 3 0 15 where NO ou diluted NO concentration at the output manifold in ppm NO yp concentration of NO impu
81. be lost so the analyzer will have to be fully recalibrated This feature is provided for service and for preliminary configuration purposes Please do not choose this selection during normal operation MAIN GAS ID The ID address of the analyzer when Multidrop RS232 communications is used AUX GAS ID The ID address of the analyzer when Multidrop RS232 communications is used 2 5 4 Measurement Menu MEASUREMENT MENU UNIT SELECTION uG M3 CONVERSION TEMP 0 DEG C DECIMAL PLACES 553 AVERAGE PERIOD 1 MINUTE FILTER TYPE KALMAN NO2 FILTER ENABLED NOISE 0 204 PPB NO OFFSET 0 00 PPB NO2 OFFSET 0 00 PPB Figure 2 10 Measurement Menu The MEASUREMENT MENU consists of items needed for basic operation and data integrity UNIT SELECTION PPM parts per million milligrams per cubic meter nc M nanograms per cubic meter G M micrograms per cubic meter PPT parts per trillion or PPB parts per billion Note If the gravimetric units are selected mG mM G M nG M then the conversion factors listed below will apply depending on the CONVERSION TEMP selected 2 20 98417600 Rev E 98417600 Rev E CHAPTER 2 INSTALLATION amp OPERATION To convert 1 PPB Gas to ug m 0 C 20 C 251 ee by 1 339 1 248 1 228 Note If the units in the MEASUREMENT MENU are changed from volumetric to gravimetric or gravimetric to volumetric
82. c pressure AMBIENT PRESSURE Sample pressure as measure in the valve manifold upstream of the critical orifices CONC VOLTAGE Voltage from the preprocessor proportional to the chemilluminescent signal from the reaction cell This voltage is represents the actual measurement of gas ANALOG SUPPLY 12 volt primary power supply DIGITAL SUPPLY 5 volt microprocessor power supply HIGH VOLTAGE PMT power supply high voltage reading VERSION Indicates the current firmware version installed in the Microprocessor 98417600 Rev E CHAPTER 2 INSTALLATION amp OPERATION Additional information on the INSTRUMENT STATUS screen is included in the EC9841 Service Manual 2 5 20 System Temperatures Screen 98417600 Rev E SYSTEM TEMPERATURES CELL TEMP 50 0 CONV TEMP 315 0 CHASSIS TEMP 35 0 MANIFOLD TEMP 55 0 COOLER TEMP 10 0 Figure 2 27 System Temperatures Screen The SYSTEM TEMPERATURES display is information continuously generated by the microprocessor CELL TEMP Temperature of the reaction cell CONV TEMP Temperature of the molybdenum converter molycon CHASSIS TEMP Temperature of air inside the chassis measured on the microprocessor PCA MANIFOLD TEMP Temperature of the orifice heater in the valve manifold COOLER TEMP Temperature of the cooled PMT block Additional information on the SYSTEM TEMPERATURES screen is included in the EC9841 Service Manual
83. calibration system and adjust the genera tor to produce sufficient O to generate an NO concentration equivalent to approximately 80 of the full scale NO range The NO concentration must not exceed 90 of the original NO concentration generated in step 2 When the analyzer responses have stabilized record the NO reading as NO pat 4 Calculate the NO concentration generated from the following equation Fo lmr NO Jour F F Equation 3 0 4 where NO oyr diluted NO concentration at the output manifold in ppm NO orig NO concentration before the addition of in ppm NO nat NO concentration after the addition of O in ppm Fyo NO flow rate in slpm 98417600 Rev E 3 13 EC9841 NOx ANALYZER OPERATION MANUAL NO mp concentration of NO impurity in the standard NO cylinder in ppm Fy generator air flow rate in slpm diluent air flow rate in slpm 5 Record the analyzer s NO response 6 Maintaining the same Fyo Fo and Fp adjust the O generator in the GPT calibration system to obtain several additional NO concentrations at least 5 evenly spaced points Calculate each NO concentration using Equation 3 0 4 and record the corresponding analyzer NO responses 7 Plot the analyzer s NO responses versus the corresponding calculated NO concentrations and construct the NO calibration curve If desired compute a calibration relationsh
84. claim we will advise you of the disposition of your equipment for repair or replacement Shipping Discrepancies Check all containers against the packing list immediately on receipt If a shortage or other discrepancy is found notify the carrier and Ecotech immediately We will not be responsible for shortages against the packing list unless they are reported promptly 98417600 Rev E EC9841 NOx ANALYZER OPERATION MANUAL ECOTECEH Service and Spare Parts For world wide customer service amp spare parts contact ECOTECH Address Ecotech Pty Ltd 1492 Ferntree Gully Road Knoxfield Victoria Australia VIC 3180 Phone 61 1300 364 946 Fax 61 1300 668 763 Email Service ecotech ecotech com au Email Spare Parts parts ecotech com au Web www ecotech com au Our Service Response Center handles product information application assistance factory repair training service maintenance agreements and technical assistance 98417600 Rev E FRONT MATTER WARNING Avoid smoking in the vicinity of the analyzer Due to the complex chemical makeup of tobacco smoke smoke drawn into the sample line may result in incorrect readings Furthermore tobacco smoke has been shown to contaminate converter and scrubber materials critical to the accuracy and stability of the analyzer 98417600 Rev E EC9841 NOx ANALYZER OPERATION MANUAL This page is intentionally left blank 98417600 Rev E CHAPTER 1 DESCRIPTION 1 0
85. ction type and press the Enter key The complete alphanumeric set recognized by the EC9841 should be displayed on the computer followed by END OF MULTI DROP PORT TEST 4 4 4 1 Multidrop Communications 98417600 Rev E The term multidrop is a idiomatic contraction of the term multiple drops It is a term used to denote a parallel connection of multiple RS232 transceivers In this scheme all receivers share the same receive line that comes from a single master Likewise these multiple transceivers share the same transmit line which goes back to a single master This strategy is a method of attaching multiple slave units instruments to a single master computer see Figure 4 3 below 4 13 EC9841 NOx ANALYZER OPERATION MANUAL MultiDrop using the 2 RS232 ports to connect each analyzer MultiDrop with Single Serial cable MASTER MASTER Datalogger Datalogger Slave 1 Slave 1 CO Analyser CO Analyser ID 1 ID 1 Slave 2 L Slave 2 Os Analyser Os Analyser ID 2 ID 2 Slave 3 L Slave 3 NOx Analyser NOx Analyser ID 3 ID 3 Slave 4 D Slave 4 SO2 Analyser SO Analyser ID 4 ID 4 Pin 2 Transmit Pin 3 Receive Pin 5 Ground Figure 4 3 Diagram showing two possible Multidrop configurations using a single cable with multiple RS232 connections left or using multiple serial cable to attach each analyzer to the next in line and then onto the Datalogger right 4 14 In the multidrop strategy each unit is given an
86. dual password This feature allows the user to exclude changes to the front panel menus by locking them through a user specified password 2 7 1 Rules of Operation o The password must be a four digit number o After a memory erasure the analyzer will default to UNLOCKED o user must enter a four digit number to lock the analyzer The same four digit number is used to unlock the analyzer as well o Once the analyzer is locked the user may navigate through the menus but cannot select a field for data entry 98417600 Rev E o CHAPTER 2 INSTALLATION amp OPERATION Each time the user wishes to lock the analyzer the password must be entered The password is only valid while the analyzer remains locked previous passwords are not remembered On the INSTRUMENT MENU there is a new entry labeled PAsswoRD that displays the status of the menu as either UNLOCKED Or LOCKED 2 7 2 Sample Session 98417600 Rev E l At INSTRUMENT MENU there is a field labeled PAsswonp This should display the status UNLOCKED Select the field labeled PAsswonp The status UNLOCKED will be replaced by 0000 Using the select and arrow keys scroll to the desired numbers to represent the password When the desired password appears press the Enter key The password will disappear and the LOCKED message will take its place The analyzer is now locked Scroll through the instrument menus
87. e analyzer measures the NO during one measurement cycle and NO during the next cycle NO is computed as the difference between NO and NO The span compensation factors are applied at the end of the complete measurement cycle 3 12 1 AZS Setup 1 Goto the CALIBRATION MENU 2 At the prompt CALIBRATION select TIMED 3 At the prompt TIMER INTERVAL set the number of hours between timed calibrations Typical settings are 23 or 24 hours 4 At the prompt STARTING HOUR enter the hour of the day when AZS is to commence 5 Atthe prompt CYCLE TIME enter the number of minutes required for the span and zero steps to run 6 At the prompt TIMED SPAN and NO2 TIMED SPAN enter the value of the span gas to be used Either or both values may be set depending on the concentrations in the span gas Both channels will be calibrated each AZS cycle If the ratio of the value entered to the value measured during each cycle is less than 0 75 or greater than 1 25 the compensation will not be calculated and will stay at the old value A message will be placed in the EVENT LOG to indicate that the ratio was less than 0 75 or greater than 1 25 7 At the prompt SPAN comp select ENABLED if you want the instrument span adjusted to agree with the span gas after each AZS cycle Caution 3 34 98417600 Rev E CHAPTER 3 CALIBRATION Setting an incorrect span gas value with SPAN COMP ENABLED cau
88. e Bavarian Network command set was set to support a specialized network in Bavaria Additionally three communication protocols are provided to allow the user to specify the different handshaking based on their requirements 4 4 1 9800 Command Set Format All 9800 commands follow the command format as specified in this section The specific 9800 commands and their functions are described in section 4 4 5 9800 Command Format lt ccccccccc gt lt III gt lt D gt lt NN gt lt PPPPPPPPPPPP gt lt T gt Where lt CCCCCCCCC gt command in ASCII 1 to 9 characters ae three digit instrument ID in ASCII format lt Da single digit data type in ASCII optional lt NN gt number of parameters in ASCII 1 to 9 optional lt PPPPPPPPPPPP gt parameter in ASCII 1 to 15 characters optional 98417600 Rev E 4 7 EC9841 NOx ANALYZER OPERATION MANUAL lt T gt termination lt CR gt or lt LF gt For commands that do not have parameters the format is the subset CCCCCCCCC III T For commands with multiple parameters the parameters are separated by the comma delimiter and the termination character follows the last parameter lt CCCCCCCCC gt lt III gt lt D gt lt NN gt lt PPPPPPPPPPPP gt lt PPPPPPPPPPPP gt lt T gt 4 4 1 1 Examples An 9800 command with no parameters would be the concentration request DCONC used here with an instrument I D of 001 DCONC 001 lt CR gt If no device I D
89. e EC9841 is compliant with the requirements of EN61010 1 A2 1995 Safety Requirements for Equipment for Measurement Control and Laboratory Use If the equipment is used for purposes not specified by the manufacturer the protection provided by this equipment may be impaired Replacement of any part should only be carried out by qualified personnel only using parts specified by the manufacturer Always disconnect power source before removing or replacing any components The Ozone Generator contains dangerous levels of voltage Make sure the power is disconnected when opening the generator unit If unfamiliar with the ozone generator refer to figure 8 in the service manual This unit generates Ozone for this reason the exhaust pump must be connected through a charcoal scrubber to remove excess ozone Surfaces marked with a Caution Hot Surface see internationally recognized symbols on page 4 sticker may get hot and deliver burns Measure the temperature on the surface before making any contact with it Equipment Rating g g g 100 120 220 240V 10 50 60 Hz 250 VA max FUSE 5A for 115V operation 3 15A for 240V operation All wiring must be in accordance with local norms and be carried out by experienced personnel Environmental Conditions RELATIVE HUMIDITY 10 to 80 Temperature 5 to 40 degrees C Pollution degree 2 Installation category II Maximum altitude 2000m 98417600 Rev E EC9841 NOx ANALYZER
90. e Finish button The driver installation is now complete 4 6 EC9800 Communicator Software The EC9800 Communicator software is supplied on CD with the EC9841 series analyzer and allows the user to communicate with the analyzer by direct serial connection modem or USB The two functions of the program are to o Download recorded data Data Acquire mode o Remotely access the analyzer s control panel Remote Terminal mode To set the EC9800 Communicator s output connection and analyzer properties use the settings dialog box Refer to section 4 6 3 4 6 1 Data Acquire Mode Data Acquire mode enables the user to download recorded data from the analyzer to a text file 4 6 1 1 Using Data Acquire Mode 1 Ensure that all Settings are correct Refer to section 4 6 3 2 Under the Mode menu tick the Data Acquire option 3 Onthe Comm menu select Start 4 Inthe dialog box that appears enter the start date time for the data in dd mm yy hh mm format For example enter 30 11 2003 14 20 for 2 20PM on 30 November 2003 5 In the dialog box that next appears enter the end date time in the same format The EC9800 Communicator will now retrieve the data To stop downloading before all data has been retrieved select Stop on the Comm menu Note 4 28 98417600 Rev E CHAPTER 4 DIGITAL COMMUNICATION The analyzer must be in Command mode before the Data Acquire mode can be used If the program was last used in Remote Terminal mode t
91. e device ID and serial number of the analyzer Format lt STX gt PI lt DEVICE I D gt lt SP lt INSTRUMENT SERIAL NUMBER gt lt ETX gt lt BCC1 gt lt BCC2 gt Note The auxiliary device I D for NO is determined by the INSTRUMENT SERIAL NUMBER Command ST Function Bavarian network command that sets the instrument mode to zero span or measure Format lt STX gt ST lt DEVICE I D gt lt SP gt COMMAND lt ETC gt lt BCC1 gt lt BCC2 gt where COMMAND M for measure N for zero for span 4 4 5 2 9800 Command Set 98417600 Rev E 4 17 EC9841 NOx ANALYZER OPERATION MANUAL 4 18 Note The TERMINATOR can be either a lt CR gt or lt LF gt The lt DEVICE I D Three Digit Instrument in ASCII Format Command ABORT Function Commands the addressed device to abort the current mode and return to the measure mode Format ABORT DEVICE I D TERMINATOR Device response ACK if the unit under test is able to perform the command lt NAK gt if not Command DAVGC Function Sends the current average concentration data to the serial port Format DAVGC DEVICE I D TERMINATOR Device response NO SPACE NO2 SPACE NOX SPACE STATUS WORD lt CR gt lt LF gt All numbers are in floating point format See the pcoNc command for an explana
92. e range usually 15 to 35 C for most calibration work 98417600 Rev E CHAPTER 3 CALIBRATION Commercial calibration systems often use circulating air in the constant temperature chamber such a chamber has the advantage of being more portable than a water bath 3 9 4 Flush Gas for the Permeation Device In Figure 3 2 the zero air stream is split to allow a small air flow to pass continuously over the permeation device Alternatively the flush gas could be supplied from a cylinder of purified dry air or nitrogen Whatever its source the flushing stream must be dry enough that moisture does not condense on the surface of the device Water condensate can react with the effusing NO to form an acid mist thus changing the NO concentration A transparent drying column containing a mixture of molecular sieve e g 6 16 mesh type 4A and indicating calcium sulfate e g Drierite has been used effectively as a moisture scrubber on the flush gas line 3 9 5 Standard NO Permeation Devices The diffusion properties of NO make the construction of stable accurate NO permeation devices no easy feat To assure their reliability the devices must be handled carefully Permeation devices are available from commercial sources and from NIST as a Standard Reference Material SRM 1629 The NIST device has a certified permeation rate of approximately 1 ug min at about 25 C Permeation rates of commercial devices vary according to size and recomm
93. ecessary perform a leak check Service Manual 3 3 11 If necessary perform a pressure calibration Service Manual 3 5 If necessary perform a converter efficiency check Operation Manual 3 6 4 If necessary perform a Multipoint calibration Operation Manual 3 6 Step 5 Data Validation Verify the results from your data acquisition system agree with the readings of the EC9841 NO analyzer Verify that the analyzer responds to automatic calibration sequences The analyzer is now operating correctly FRONT MATTER Table of Contents MANUAL HISTORY 5 etre esee eR cd ded ER EE a geb eee patei husks qe epe geachtet otl deut eee eU o eee pee debe ae E 1 1 NOTICE EE 1 2 INTERNATIONALLY RECOGNIZED SYMBOLS USED ON ECOTECH EQUIPMENT eese 1 4 SAFETY REQUIREMENTS 2 5 rete tec ei etr bep oC E rc eire pecoris a lee este 1 5 FACTORY SER VICE M G 1 6 CLAIMS FOR DAMAGED SHIPMENTS AND SHIPPING DISCREPANCIES ener enne rennen 1 7 SERVICE AND SPARE PARTS tod cte get fe oye eie Filed repete decade eo ce d et e eo s 1 8 WARNING date pute eins saa opens duele a a quce dc dte 1 9 LO DESCRIPTION T E 1 1 T3ESPECIFICATIONS hr aant nm duet ena 1 2 ISSN Cu D m 1 2 IMEMIUTASRU
94. ecommended Pressure Regulator for Standard NO Cylinder This regulator must have a nonreactive diaphragm and internal parts and a suitable delivery pressure Ozone Generator The generator must be capable of generating sufficient and stable levels of O for reaction with NO to generate NO concentrations in the range required Ozone generators of the electric discharge type may produce NO and NO and are not recommended Also the importance of using dry clean zero air in the pneumatics cannot be overemphasized All connections between components in the calibration system downstream from the O generator should be of glass Teflon or other nonreactive material Valve A valve may be used as shown in Figure 3 1 to divert the NO flow when zero air is required at the manifold The valve should be constructed of glass Teflon or other nonreactive material Reaction Chamber A chamber constructed of glass Teflon or other nonreactive material for the quantitative reaction of O with excess NO The chamber should be of sufficient volume such that the residence time tg meets the requirements specified in section 3 8 6 For practical reasons tg should be less than two minutes Mixing Chamber A chamber constructed of borosilicate glass Teflon or other nonreactive material and designed to provide thorough mixing of the reaction products and diluent air The residence time is not critical when the dynamic parameter specification g
95. econdary Raw Concentration before 984X background and gain 88 984X Background Concentration before gain 89 Calibration Pressure 90 Converter Efficiency 91 Multidrop Baud Rate 92 Analog Range Gas 1 93 Analog Range Gas 2 94 Analog Range Gas 3 95 Output Type Gas 1 0 Voltage 1 Current 96 Output Type Gas 2 0 Voltage 1 Current 97 Output Type Gas 3 0 Voltage 1 Current 98 Voltage Offset Current Range Gas 02096 or 0 20mA 12596 or 2 20mA 2 10 or 4 20mA 99 Voltage Offset Current Range Gas2 02096 or 0 20mA 1 5 or 2 20mA 2 10 or 4 20mA 100 Voltage Offset Current Range Gas3 02096 or 0 20mA 12596 or 2 20mA 2 10 or 4 20mA 101 Full Scale Gas 1 98417600 Rev E CHAPTER 4 DIGITAL COMMUNICATION 102 Full Scale Gas 2 103 Full Scale Gas 3 104 Zero Adjust Gas 1 105 Zero Adjust Gas 2 106 Zero Adjust Gas 3 107 Negative 10V Supply 108 50 Pin IO ANINI 20mV resolution analog input 0 5V 109 50 Pin IO ANIN2 20mV resolution analog input 0 5V 110 Instrument State 111 CO Linearisation Factor A 112 CO Linearisation Factor B 113 CO Linearisation Factor C 114 CO Linearisation Factor D 115 CO Linearisation Factor E 116 Instrument Units 0 PPM 1 PPB 2 PPT 3 mG M 4 1G M 5 06 117 Background Measure Time In seconds 118 Samp
96. een Message Instrument Activity MOLYCON IS COLD MOLYCON IS HOT BACKGROUND FILL Cell filling with zero air BACKGROUND MEASURE Zero reading from measurement cell Final determination of system zero SAMPLE FILL Cell filling with sample air SAMPLE MEASURE Instrument operational must be calibrated if this is the first power up sequence The startup sequence is keyed to the molycon temperature The molycon must reach 250 C before the ozone generator will begin operating This will typically take about 45 minutes The molycon reaches its operating temperature of 320 x5 C approximately 60 minutes after applying power Note The EC9841 will re run the above start up routine whenever power has been lost for more than two minutes If power is lost for less than two minutes the analyzer will return to its previous settings without the start up routine 2 3 Operation This section describes the actions necessary to operate the instrument first in general then in specific terms In section 2 5 the menu headers are shown as they appear on the display screen The illustration is followed by explanatory information regarding the menu entries or choices The entire menu tree is shown in Figure 2 6 98417600 Rev E 2 9 EC9841 NOx ANALYZER OPERATION MANUAL 2 10 2 3 1 General Operation Information All operator responses needed to operate the EC9841 are performed by pressi
97. ell This voltage represents actual gas measurement HIGH VOLTAGE Microprocessor generated information Use the value as reference when adjusting the high voltage adjust pot 2 5 9 Valve Test Menu VALVE TEST MENU INT VALVE 1 OPEN INT VALVE 2 CLOSED INT VALVE 3 CLOSED INT VALVE 4 OPEN INT VALVE 5 OPEN EXT MEASURE OPEN EXT ZERO GAS CLOSED EXT SPAN GAS CLOSED VALVE SEQUENCING ON Figure 2 16 Valve Test Menu The VALVE TEST MENU allows the valves to be set to either OPEN or CLOSED according to the operator s choice To manually operate the valves VALVE SEQUENCING needs to be turned off The EC9841 Service Manual includes the names and pneumatic positions of the valves described here INT VALVE 1 NOx sample INT VALVE 2 NO sample INT VALVE 3 NOx bypass 98417600 Rev E 2 27 EC9841 NOx ANALYZER OPERATION INT VALVE 4 NO bypass INT VALVE 5 Background EXT MEASURE MANUAL Externally supplied sample stream EXT ZERO GAS Externally supplied zero air EXT SPAN GAS Externally supplied span gas VALVE SEQUENCING Set to ON or OFF ON is used for automatic valve control OFF is operator manual control of valves Normal operation requires that VALVE SEQUENCING be set to ON VALVE SEQUENCING will automatically be reset to ON whenever the primary screen is displayed 2 5 10 Diagnostic Menu DIAGNOSTIC ME
98. ended operating temperature Both NIST and commercial manufacturers provide explicit instructions on the use of their devices for accurate measurements follow those instructions Most permeation devices must equilibrate for at least 24 hours at the certified or operating temperature before the permeation rate stabilizes If the device is subjected to extreme temperature variations when not in use equilibration times may increase and the permeation rate may become erratic It was mentioned above that the flush gas over the permeation device must be extra dry This is especially true of the NIST device and of many others with a large surface area for NO permeation Some commercial devices that have very small permeating areas and which are designed to operate at elevated tempera tures 40 to 60 C may not be as susceptible to trace moisture in the flush gas Additional information regarding the use of permeation devices for calibration purposes is documented elsewhere If the NO permeation device is to be used as the reference standard for calibration the permeation rate of the device must be traceable to an NIST NO in N standard SRM 1683 or 1684 or NO standard SRM 1629 Otherwise the 98417600 Rev E 3 25 EC9841 NOx ANALYZER OPERATION MANUAL permeation device must be periodically assayed against the reference NO standard to assure consistency between the two working standards Procedures for certifying the reference standard
99. endment 2 0 Immunity Requirements EN61326 1 IEC 61000 4 11 Voltage Interrupts IEC 61000 4 11 Voltage Dips IEC 61000 4 3 Radiated RF electromagnetic field immunity test IEC 61000 4 4 Electrical fast transient burst immunity test IEC 61000 4 5 Surge immunity test IEC 61000 4 6 Immunity to conducted disturbances induced by radio frequency fields o Electromagnetic compatibility EN61326 1 Annex A CISPR 22 and CISPR 16 2 CISPR 16 1 and CISPR 16 2 EN 61010 1 Safety requirements for electrical equipment control and laboratory use o Section 19 of EN 60204 1 Insulation Resistance Check Residual Voltage Check Earth Continuity The equipment must be operated as per the directions given by Ecotech P L in this manual 98417600 Rev E EC9841 NOx ANALYZER OPERATION MANUAL Internationally Recognized Symbols Used on Ecotech Equipment IEC 60417 No 5016 IEC 60417 No 5017 IEC 60417 No 5021 IEC 60417 No 5032 i a IEC 60417 No 5041 ISO 7000 0434 ISO 3864 No B 3 6 Electrical fuse Earth ground terminal Equipotentiality Alternating current Caution hot surface Caution refer to accompanying documents Caution risk of electric shock 98417600 Rev E FRONT MATTER Safety Requirements g To reduce risk of personal injury caused by electrical shock follow all safety notices and warnings in this documentation This equipment should always be used with a protective earth installed Th
100. er has failed LAMPFAIL Indicates that the lamp has failed FLOWFAIL Indicates that the sample flow is less than 0 1 slpm SYSFAIL Indicates one or more components have failed HEATERFAIL Indicates that a system heater has failed COOLERFAIL Indicates that a cooler has failed CVFAIL Indicates that a converter has failed ZEROON Indicates that the instrument is in the Zero mode OUT OF SERVICE Out of service switch has been activated on analyzer HV FAIL Indicates that the PMT high voltage supply has failed PS FAIL Indicates that the 12 volt supply voltage has gone out of range GRAV Measuring in gravimetric units i e MG M3 VOL Measuring in volumetric units i e PPM Example If a failure status is received as C022 then the failures of the instrument as determined by this code are C FLOWFAIL Indicates that the sample flow is less than 0 1 slpm SYSFAIL Indicates one or more components have failed 0 No Failure 2 OUT OF SERVICE Out of service switch has been activated on analyzer 2 VOL Measuring in volumetric units i e PPM 98417600 Rev E
101. er value and assume there is no NO impurity in the cylinder From the GPT data plot the analyzers NO responses versus the NO concentration generated by GPT Determine the slope of the NO output curve and the x intercept of the curve Generate several NO concentrations by diluting the NIST traceable standard Plot the analyzer s NO responses versus NO concentrations Determine the slope Calculate the NO concentration of the working standard from the following formula 98417600 Rev E CHAPTER 3 CALIBRATION S NO stp NO xa 5 Equation 3 0 17 Calculate the NO impurity from the following equation x intercept F SNOM F NO Suis NO lup Equation 3 0 18 3 10 2 NO Working Standards Traced to NIST Standards If you have selected Alternative B for calibration or if you want to verify your NO working standard used for Level2 zero span checks the following procedures apply 3 10 2 1 NO Working Standard Traced to NIST NO Standard The analyzer need not be calibrated for these measurements Generate several NO concentrations by diluting the NIST traceable NO standard Plot the analyzer s NO response versus NO concentration and determine the slope Generate several NO concentrations by diluting the working NO standard to give on scale NO responses Measure the total flow at the manifold F in slpm for each NO concentrati
102. et to MANUAL and CAL MODE tO SPAN From the primary screen start the calibration sequence by pressing either the Up or Down arrow key A or Y until the display prompts START MANUAL CALIBRATION Pressing the Select key will allow you to choose from No SPAN or ZERO Confirm that the display reads sPAN and press Enter 1 A backlit cursor will be displayed on the NOx concentration display Use the Select key to move the position of the backlit cursor and the Up and Down arrow keys to increment and decrement the value of the backlit digit until the span calibration gas concentration value is displayed When the desired concentration is displayed press Enter Next move the cursor to the CONVERTER EFFICIENCY field If the converter efficiency is known to be other than 100 program this value and press Enter otherwise press Enter Then move the backlit cursor to the INSTRUMENT GAIN field The instrument gain is automatically calculated by the analyzer Press Enter to confirm this value Press Exit to return to the primary screen The concentration on the primary screen should now read the same as the concentration of the calibration gas 2 13 EC9841 NOx ANALYZER OPERATION MANUAL Dual Gain procedure 2 14 10 With a stable supply of calibration gas NO connected to the Inlet port of the analyzer verify that in the CALIBRATION MENU CALIBRATION is set to MANUAL and
103. gas in the regulator Vent the gas through an activated charcoal column to the outside Do not allow the pressure in the first stage of the regulator to drop to atmospheric Stop at about 50 psi 4 Open the main tank valve momentarily and repeat step 3 5 Hlush the regulator and delivery system by performing steps 2 and 3 with the delivery system line venting at a point as near the line restriction as possible If the delivery line contains a gauge or tee that leg must be flushed as well 6 When the system has been flushed by five to ten repetitions of opening and closing the main valve leave the main valve open and close the vent points in the delivery line so the system is leak tight Check the system for leaks 7 Do not remove the regulator from the cylinder and do not do anything that would allow air to diffuse back into the regulator or this process must be repeated 3 7 EC9841 NOx ANALYZER OPERATION MANUAL 3 8 3 5 Molycon Converter Efficiency Converter efficiency is defined as the percentage of NO converted to NO in the analyzer s molycon converter The accuracy of NO measurements with the EC9841 analyzer depends on the efficiency of the analyzer s NO to NO converter The analyzer cannot be used as a U S EPA designated reference method unless the converter efficiency is 96 or greater The multipoint calibration procedure in this chapter contains a procedure for checking the molycon converter efficiency with an NO c
104. ge the value Press Enter to confirm the input value Now move the cursor to the CONVERTER EFFICIENCY field If the converter efficiency is known then program that value in and press Enter If the efficiency is not known program for a value of 100 and press Enter The INSTRUMENT GAIN values should be recorded for future reference Press Exit to return to the primary screen The displayed NO value should now agree with the value calculated in Equation 3 0 1 of step 2 the NO span value should agree with the value calculated in Equation 3 0 2 step 2 and set in step 4 If the values do not agree with those calculated check the standard A common problem is that contaminating an NO standard with air leads to conversion of some NO to NO Check the calibration system for leaks for conditions that can cause the conversion of NO to and for conditions that can consume NO or NO Also check the instrument for leaks a leak in a channel may cause a low reading on that channel 3 6 4 Preliminary Converter Efficiency Check 98417600 Rev E 1 From the primary screen press the Up or Down arrow key to prompt START MANUAL CALIBRATION Confirm that the display reads span and press lt Enter gt Move the backlit cursor to the CONVERTER EFFICIENCY field Program this value for 100 and press lt Enter gt Press lt Pg Up gt or lt Exit gt to leave the calibration routine Adj
105. h 5 V 4 1 3 50 Pin I O Outputs The status outputs are active low ULN2003 open collector Darlingtons The status outputs can be used to drive relays or with the use of external pull up resistors as a voltage indication of on off conditions The internal 12 V pin 50 or an external power supply may used as the relay or indicator power source 4 4 98417600 Rev E CHAPTER 4 DIGITAL COMMUNICATION Current through the outputs should be kept as low as possible ideally around 1 mA If an external supply is used it should be less than 50 VDC and the current sunk by each output should be 50 mA If the internal 12 V supply is used the total current drawn must be kept to less than 50 mA or damage to the analyzer will result Figure 4 1 Status Output Connections 4 2 Serial Control Two modes of operation are available using the serial interface These modes are Terminal and Command In Command mode a library of commands becomes available These are listed at the end of this chapter In Terminal mode the instrument communication is through the analyzer menu structure 4 2 1 Serial Connections 98417600 Rev E The EC9841 has two tristate RS232 ports on the rear of the analyzer The tristate RS232 causes all instruments not addressed to turn off their transmission capability until the next activation command is received Communication among devices is defined in terms of Data Terminal Equipment DTE and Data Communication Equipmen
106. h menu selectable zero offset of 0 5 or 10 The 9841B requires an optional 50 I O board to give voltage output 98417600 Rev E 1 3 EC9841 NOx ANALYZER OPERATION MANUAL o Independent output for NO NOx and NO 1 1 16 Digital Output o Multidrop RS232 port shared between analyzers for data status and control o Service RS232 port gives front panel access to a local or remote user o USB port connection on the rear panel provides data transfer and control o DBSO with discrete status user control and analog output 1 2 U S EPA Reference Method The EC9841 nitrogen oxides analyzer is designated under U S EPA regulations as reference method RENA 1292 090 Use of the EC9841 under U S EPA designation as a reference method as defined in 40 CFR Part 53 requires operation under the following conditions o Dual Gain NO o Range Any full scale range from 0 to 0 05 ppm to 0 to 1 0 ppm o Ambient temperature 15 to 35 C o Line voltage 105 to 125 VAC 60 Hz or 200 to 240 VAC 50 Hz o Flow rate 0 64 slpm o Ecotech external pump or equivalent see section 2 1 2 3 o Filter A 5 micron PTFE filter must be installed in front of the sample inlet Zero and Span gas must pass through this filter o If the units in the MEASUREMENT MENU are changed from volumetric to gravimetric or gravimetric to volumetric the analyzer must be re calibrated o The analyzer must be operated and maintained i
107. haracteristics of the ozone generator do not meet the minimum total flow requirements of the analyzer under calibration then either the generator must be replaced or the number of analyzers to be calibrated simultaneously must be reduced 3 8 3 Major Equipment Required o Stable O generator o Strip chart recorder or DAS o NO concentration standard about 100 ppm NO in nitrogen 3 8 4 System Setup Figure 3 1 shows the suggested placement of the components of a typical GPT system Such systems are also available commercially All connections between components in the system should be made with glass Teflon or other nonreactive material The discussion below is restricted to an apparatus capable of producing sample flows between 1 and 10 slpm at the manifold This is the flow range over which GPT of excess NO with O has been most widely used and investigated 98417600 Rev E 3 17 EC9841 NOx ANALYZER OPERATION MANUAL NO Flow Controller A device capable of maintaining constant NO flow within 2 of the required flow rate Components in contact with the NO should be of a nonreactive material Air Flowmeters Calibrated flowmeters capable of measuring and monitoring air flow rates with an accuracy of 2 of the measured flow rate NO Flowmeter A calibrated flowmeter capable of measuring and monitoring NO flow rates with an accuracy of 2 of the measured flow rate Use of a low volume certified bubblemeter and a stop watch is r
108. he analyzer may still be in Remote mode See section 4 6 2 2 for further details Note Data Acquire mode only retrieves data already logged by the analyzer To remotely instruct the analyzer to log data use the Remote Terminal mode 4 6 1 2 Viewing the Acquired Data If the communication was successful a table of data similar to the below will be 98417600 Rev E displayed 9800 Data Downloader Comm Mode lai x C200 C200 C200 e Date Time Gast Unt Period Function Status_ Faile Status Type __ 03 12 01 09 59 0 001013 ppm 1 min 03 12 01 10 00 0 001012 ppm 1 min 03 12 01 10 01 0 001012 ppm 1 min M 03 12 01 10 02 0 001012 ppm 1 min M C200 03 12 01 10 03 0 001012 ppm 3 min M 03 12 01 10 03 0 001012 ppm 1 min M 03 12 01 10 04 0 001012 ppm 1 min M 03 12 01 10 05 0 001012 ppm 1 min M 03 12 01 10 06 0 001012 ppm 3 min M 03 12 01 10 06 0 001012 ppm 1 min M 03 12 01 10 07 0 001012 ppm 1 min M 03 12 01 10 08 0 001012 ppm 1 min M 03 12 01 10 08 0 001012 ppm 3 min M 03 12 01 10 08 0 001012 ppm 1 min M 03 12 01 10 10 0 001012 ppm 1 min M 03 12 01 10 11 0 001012 1 min M 03 12 01 10 12 0 001012 ppm 3 min M 2 12 01 101 nanini9 mere 4 on 200 C200 C200 C200 C200 C200 C200 C200 C200 C200 C200 C200 C200 conn Inst Inst Inst Inst Avg Inst Inst Inst Avg Inst Inst Inst Avg Inst Inst Inst Download Complete COM1
109. ichever is greater with Kalman filter active o Analog output 0 5 ppb or 0 2 of analog output full scale whichever is greater 1 1 4 Zero Drift o Temperature dependent 0 1 ppb per C o Time dependent at fixed temperature 24 hours Less than 1 ppb 30 days Less than 1 ppb 1 1 5 Span Drift o Temperature dependent 0 1 per C o Time dependent at fixed temperature 24 hours 1 of reading 30 days 1 of reading 1 2 98417600 Rev E CHAPTER 1 DESCRIPTION 1 1 6 Lag Time Less than 25 seconds 1 1 7 Rise Fall Time 95 of Final Value Less than 60 seconds with Kalman filter active 1 1 8 Linearity Error 1 of full scale from best straight line fit 1 1 9 Precision 0 5 ppb or 1 of reading whichever is greater 1 1 10 Sample Flow Rate 640 mL minute total flow for two channels 1 1 11 Sample Pressure Dependence A 5 change in pressure produces less than 1 change in reading up to 2000m above sea level 1 1 12 Temperature Range 65 to 40 C 41 to 104 F o U S EPA designated range 15 to 35 o Eignungsgepr ft range 5 to 40 C 1 1 13 Power o 99 to 132 VAC 198 to 264 VAC 47 to 63 Hz o U S EPA designated range 105 to 125 VAC 60 Hz or 200 to 240 VAC 50 Hz 1 1 14 Weight a 26 4 kg 58 Ib 1 1 15 Analog Output o Menu selectable current output of 0 20 mA 2 20 mA and 4 20 mA o Jumper selectable voltage output of 100 mV 1 v 5 V and 10 V wit
110. icians when troubleshooting or verifying correct instrument performance This option only appears when the diagnostic mode is set to OPTIC ELECT or PREAMP NO Gas concentration reading during diagnostics This option only appears when the diagnostic mode is set to OPTIC ELECT or PREAMP 2 5 7 Output Test Menu OUTPUT TEST MENU PREPROCESSOR POTS VALVE TEST MENU Figure 2 14 Output Test Menu The OUTPUT TEST MENU allows the user to select the menus to view controls for digital potentiometers and valves 2 5 8 Preprocessor Pots Menu PREPROCESSOR POTS INPUT 40 TEST MEASURE 0 HIGH VOLTAGE ADJUST 53 NO 0 400 PPM CONC VOLTAGE 3 500 VOLTS HIGH VOLTAGE 650 VOLTS Figure 2 15 Preprocessor Pots Menu PREPROCESSOR POTS are electronically controlled digital potentiometers used for adjustments to operations of the preprocessor board Each pot is set with digits 0 to 99 in a non wraparound scrolling field INPUT Sets input gain on the preprocessor board 2 26 98417600 Rev E CHAPTER 2 INSTALLATION amp OPERATION TEST MEASURE Software controlled pot that is used by technicians when troubleshooting or verifying correct instrument performance HIGH VOLTAGE ADJUST Pot used to adjust high voltage to the PMT NO PPM Gas concentration reading CONC VOLTAGE Voltage from the preprocessor proportional to the chemilluminescent signal from the reaction c
111. ilable rates are 1200 2400 4800 9600 19200 and 38400 DATA LENGTH Sets the number of data bits used in serial transmissions The available lengths are 7 and 8 2 30 98417600 Rev E CHAPTER 2 INSTALLATION amp OPERATION STOP BITS Sets the number of stop bits used in serial transmissions The available number of stop bits is 1 and 2 PARITY Sets the parity used in serial transmissions The available choices are NONE EVEN and ODD COMM PROTOCOL Sets the communication protocol in serial transmissions The available choices are ORIGINAL BAVARIAN and ENHANCED See Chapter 4 2 5 13 Analog Output Menu ANALOG OUTPUT MENU NO OUTPUT MENU NOx OUTPUT MENU NO2 OUTPUT MENU Figure 2 20 Analog Output Menu The ANALOG OUTPUT MENU contains settings that relate to the recording devices 2 5 14 NO NO NO2 Output Menus The NO NOx NO2 OUTPUT MENUS contain the settings for each analog output channel The three menus are functionally identical The setting of and OVER RANGE has no impact on the measurement range of the analyzer it only affects the analog output scaling 2 5 14 1 NO NO NO2 Output Menu Current NO OUTPUT MENU RANGE 0 500 PPM OUTPUT TYPE CURRENT CURRENT RANGE 0 20 MA FULL SCALE 0 00 ZERO ADJUST 0 00 OVER RANGE 20 00 PPM OVER RANGING DISABLED Figure 2 21 Analog Output Menu Current The above menu will be displayed whenever
112. ins that correspond to the desired printed selections on the front of the board If current is selected only the jumpers selecting current make contact with both rows of pin shown in Figure 2 3 s The other jumpers are offset as If a current output is selected the range must also be chosen from the menu when the instrument is operating The compliance voltage for the current output is 12 v A terminating resistor of 600 ohms or less should be used for measurement errors no greater than 1 If voltage output is selected both the REC a 10 volts full scale Other full scale outpu selected Select the full scale output for Ri nd DAS outputs are factory set for ts of 5v 1 v and 0 1 v can be EC and pas When using voltage output the source resistance for both REC and pas outputs is 1000 ohms The recorder and DAS input resistance should measurement error no greater than 1 be greater than 500K ohms for a 98417600 Rev E CHAPTER 2 INSTALLATION amp OPERATION Connect the recorder or DAS wires to the appropriate terminal block The wire positions are OUT positive or signal COM ground or low SHLD shielded cable Caution To prevent ground loop problems connect the shield of the cable at the analyzer only not at the recorder or DAS For additional information regarding output see section 2 6 below 2 1 2 1 2 Current Output Connections When using the EC9841 without the 50 pin I O PCA the analyzer
113. ion 2 5 3 Single gain procedure 15 Connect a source of span calibration gas to the analyzer through the Inlet port see the remainder of this section for instructions on preparing calibration gas Allow the analyzer to sample the gas until a stable reading is obtained typically 15 minutes From the primary screen start the calibration sequence by pressing either the Up or Down arrow key A until the display prompts START MANUAL CALIBRATION Pressing the lt Select gt key will allow you to choose from NO SPAN or ZERO Confirm that the display reads SPAN and press Enter J A backlit cursor will be displayed on the NOx concentration display Use the lt Select gt key to move the position of the backlit cursor and the Up and Down arrow keys to increment and decrement the value of the backlit digit until the span calibration gas concentration value is displayed When the desired concentration is displayed press lt Enter gt Next move the cursor to the CONVERTER EFFICIENCY field If the converter efficiency is known to be other than 100 program this value and press lt Enter gt otherwise press lt Enter gt Then move the backlit cursor to the INSTRUMENT GAIN field The instrument gain is automatically calculated by the analyzer Press lt Enter gt to confirm this value Press lt Exit gt to return to the primary screen 98417600 Rev E CHAPTER 3 CALIBRATION Dual gain procedure 1 Connect a sou
114. ip for the NO channel 3 6 7 Final Converter Efficiency Check 1 Calculate a least squares slope for the NO calibration curve using NO our as the X variable and the corresponding NO reading in ppm as the Y variable 2 Calculate the final converter efficiency from the following equation final equation 3 x slope Equation 3 0 5 3 If the final converter efficiency is less than 96 replace the converter and repeat the calibration process If the converter efficiency is 9696 or greater the analyzer calibration is complete and the analyzer is ready for operation 3 7 Multipoint Calibration Procedure Alternative B NO Permeation Device Although calibration of the analyzer with an NO permeation tube is not recommended for reasons discussed earlier a brief description of the calibration technique is given below 1 In addition to an NO permeation system a source of NO and a GPT calibration system are required The NO cylinder does not have to be NIST traceable but the NO concentration should be known to within 10 2 Prepare the analyzer for calibration see section 3 6 1 for guidance 3 14 98417600 Rev E CHAPTER 3 CALIBRATION 3 Perform a pseudo calibration of the analyzer using the NO source and GPT as described in section 3 6 above Set the NO span assuming that the NO cylinder contains no NO impurity Check and set the converter efficiency as described in the GP
115. is used to calculate the compensation value If SPAN COMP is set to ENABLED this is the value which is used to correct all subsequent readings to the calibration The zero air valve is switched on for 3 minutes to purge the cell of span gas At the end of 28 minutes seconds monitoring resumes including putting data in the average etc The data averages are not updated during zero span check EC9841 NOx ANALYZER OPERATION MANUAL 3 13 Calibration References 1 Quality Assurance Handbook for Air Pollution Measurement Systems Volume IL Part 1 EPA 454 R 98 004 U S Environmental Protection Agency Environmental Monitoring Systems Laboratory Research Triangle Park NC 27711 1998 Technical Assistance Document For The Chemiluminescence Measurement of Nitrogen Dioxide EPA 600 4 75 003 U S Environmental Protection Agency Environmental Monitoring Systems Laboratory MD 77 Research Triangle Park NC 27711 December 1975 98417600 Rev E CHAPTER 3 CALIBRATION This page is intentionally left blank 98417600 Rev E 3 37 CHAPTER 4 DIGITAL COMMUNICATION 4 0 Digital Communication The EC9841 series of analyzers has three methods of digital communication serial communication using RS232 signals Universal Serial Bus USB or discrete control over the 50 pin I O Discrete control is limited to lines which either command a specific operation or indicate an operation is in progress Serial communication allows acces
116. it is on the left least significant bit on the right for example 10100101 would correspond to a device ID of A5 hex or 165 decimal Device response lt ACK gt Command REMOTE Function Puts the instrument in the VT 100 compatible terminal mode All of the menus with the exception of the trend displays become available to a remote controller through the serial port The remote PC an ANSI terminal may also be used should be configured as follows Windows Terminal mode Hyper Terminal accessory terminal emulation VT 100 communications settings 9600 or whatever the current instrument host baud rate is 8 bits 1 stop no parity 98417600 Rev E 4 23 EC9841 NOx ANALYZER OPERATION MANUAL 4 24 An ANSI terminal should be configured as follows WYSE WY 60 or WY 75 VT 100 emulation full duplex WYSE WY 50 Not recommended no ANSI mode Recommended baud rate is at least 4800 baud The following remote terminal keys are now active using numeric keypad with NUM LOCK enabled on remote terminal Key Key Label Function Enter Enter Enter 7 Home Exit 9 Pg Up Page up 8 Up arrow Up 2 Down arrow Down 6 Right arrow Select Format REMOTE DEVICE I D gt TERMINATOR Device response lt ACK gt then clearscreen then menu display Command RESET Function Reboots the instrument software reset Format RESET lt DEVICE I D gt TE
117. iven in section 3 8 6 below is met Output Manifold The output manifold should be constructed of borosilicate glass Teflon or other nonreactive material and should be of sufficient diameter to ensure an insignificant pressure drop at the analyzer connection The system must have a vent designed to ensure atmospheric pressure at the manifold and to prevent ambient air from entering the manifold 3 8 5 Reagents 3 8 5 1 NO Concentration Standard Pressurized cylinders of NO in N at levels between 50 and 100 ppm are available commercially as working calibration standards The buyer should specify that oxygen free nitrogen be used as the diluent gas for the standard mixture to minimize the problem of NO formation within the cylinder In any case the stan 98417600 Rev E CHAPTER 3 CALIBRATION dard NO mixture must contain no more than 1 0 ppm NO as impurity Since the manufacturer s certification of the NO content in N mixtures has sometimes been found to be unreliable the calibration procedure requires that the NO content of such mixtures be assayed initially and periodically thereafter against an NIST traceable NO or NO standard Traceability may be made to NO SRM 1683 or 1684 or to NO SRM 1629 The certification procedure is discussed in section 3 10 below It is suggested that the recertification of working NO standards be done quarterly since the long term stability of NO mixtures has not been firmly established Special appa
118. le Fill Time In seconds 119 Sample Measure Time In seconds 120 Aux Measure Time In seconds 121 Aux Sample Fill Time In seconds 122 Background Fill Time In seconds 123 Zero Hill Time In seconds 124 Zero Measure Time In seconds 125 Span Fill Time In seconds 126 Span Measure Time In seconds 127 Span Purge Time In seconds 128 Background Pause Time In seconds 129 Background Interleave Factor In seconds 130 Calibration Pressure 2 131 AUX Instrument Gain 132 Background voltage 133 AUX Background Voltage 134 O3 Generator Output PPM 135 O3 Generator On Off 136 Calibration Point 1 PPM 137 Calibration Point 2 PPM 138 Calibration Point 3 PPM 139 Calibration Point 4 PPM 140 Calibration Point 5 PPM 98417600 Rev E EC9841 NOx ANALYZER OPERATION MANUAL 141 Desired Pump Flow SLPM 142 Actual Pump Flow SLPM 143 Set Lamp Current 144 Lamp Current mA 145 Cycle Time Minutes 146 Analog GND Offset Volts 98417600 Rev E CHAPTER 4 DIGITAL COMMUNICATION 98417600 Rev E EC9841 NOx ANALYZER OPERATION MANUAL Appendix B Failure Status descriptions The failure status codes provided by the 9800 downloader are described below Each of the 4 units of the code represent a column below the description within the box of the corresponding unit explains the failure status of various components if any and more detailed descriptions are out
119. libration Procedure esee eee teen enne eene trennen ener 2 41 2 6 4 Calibration Requir tments ies te erri de rri oh sop E ERU lo e UR Cette 2 42 2 7 PASSWORD PROTECTIONS eret ertet tee t er ere D NR ERREUR UNE Quer ir e RENNES 2 42 2 71 Rules of Operation iae ei a en e e e UR ER eR ERR teens ER Tee ire a tet d 2 42 27 2 SAMPLE Sessiohtu ci c eiat C E Ten Pe QUERER Reve OR ER Teen Pet etd 2 43 On Un 3 1 3 VOVERVIEW ceno 3 1 3 1 1 Analyzer Calibration Instructions eese eese esee eene 3 2 3 2 MULTIPOINT CALIBRATION AND ZERO SPAN eee enne en enne enint emere 3 4 3 2 I Interface Conn ctions 4i o e era t eda et Pa i beg e E eb eere 3 5 3 2 2 Z0TO AIF GNC TAON 5s ern ed t ie eter etes eue deese sete pese age Nesta e es eene tee eee Ue 3 5 3 3 CALIBRATION AND ZERO SPAN CHECK SCHEDULE eese enne ener 3 5 3 4 CALIBRATION STANDARDS hiat ten den obtain n ee pet teet 3 6 HAA Standard Source of NO a AR NE TERN e prete RES 3 6 3 4 2 Standard Source Of NO eee ette teet t trea rep i E Eee iratos 3 6 3 4 3 Preparing the NO Regulator and Delivery System eese nene eene 3 7 3 9 MOLYCON CONVERTER EFFICIENCY 3 8 3 6 MULTIPOINT CALIBRATION PROCE
120. lines below the table Unit 1 Digit 2P opp 3 Digit 4 Digit 0 NO FAILURE NO FAILURE NO FAILURE GRAV 1 CHOPFAIL REFFAIL ZEROON GRAV 2 LAMPFAIL HEATERFAIL OUT OF SERVICE VOL 3 CHOPFAIL REFFAIL ZEROON VOL LAMPFAIL HEATERFAIL OUT OF SERVICE 4 FLOWFAIL COOLERFAIL HV FAIL GRAV 5 CHOPFAIL REFFAIL ZEROON GRAV FLOWFAIL COOLERFAIL HV FAIL 6 LAMPFAIL HEATERFAIL OUT OF SERVICE VOL FLOWFAIL COOLERFAIL HV FAIL 7 CHOPFAIL REFFAIL ZEROON VOL LAMPFAIL HEATERFAIL OUT OF SERVICE FLOWFAIL COOLERFAIL HV FAIL 8 SYSFAIL CVFAIL PS FAIL GRAV SPANON 9 CHOPFAIL REFFAIL ZEROON GRAV SYSFAIL CVFAIL PS FAIL SPANON A LAMPFAIL HEATERFAIL OUT OF SERVICE VOL SYSFAIL CVFAIL PS FAIL SPANON B CHOPFAIL REFFAIL ZEROON VOL LAMPFAIL HEATERFAIL OUT OF SERVICE SPANON SYSFAIL CVFAIL PS FAIL FLOWFAIL COOLERFAIL HV FAIL GRAV SYSFAIL CVFAIL PS FAIL SPANON D CHOPFAIL REFFAIL ZEROON GRAV FLOWFAIL COOLERFAIL HV FAIL SPANON SYSFAIL CVFAIL PS FAIL E LAMPFAIL HEATERFAIL OUT OF SERVICE VOL FLOWFAIL COOLERFAIL HV FAIL SPANON SYSFAIL CVFAIL PS FAIL F CHOPFAIL REFFAIL ZEROON VOL L
121. ll ventilated and should allow convenient access to the operator controls and front panel display The analyzer can operate in a range of 5 to 40 C without risk of damage 2 1 1 1 Rack Mount or Enclosed Location The analyzer is supplied as a bench top version with rubber feet or with the chassis slides to convert it to a rack mount version The optional rack mount version is 24 inches 61 cm deep and fits into a 19 inch 48 3 cm RETMA instrumentation rack The front panel will protrude slightly Refer to the instructions provided with the rack mount kit for assembly into a rack Caution The rack mount version requires a properly ventilated rack enclosure The temperature inside enclosures that are not properly ventilated may rise as much as 15 C above the ambient air temperature This may force the analyzer to operate outside of specifications Optimum operation is obtained at operating temperature of 20 to 30 C inside the rack enclosure For ventilation calculations use a heat dissipation rating of 150 watts or 512 Btu per hour After the analyzer has been mounted make the pneumatic and electrical connections 2 1 2 Connections All pneumatic connections must be secure to ensure accurate operation of the analyzer The following information describes connection techniques for pneumatic and electrical connections Figure 2 1 shows the rear panel of the analyzer with associated connections Notice the Network connection is
122. lyser If your hardware came with an installation CD lt 6 or floppy disk insert it now What do you want the wizard to do Install the software automatically Recommended Install from a list or specific location Advanced Click Next to continue Next gt Cancel Figure 4 5 Screenshot of menu which appears when USB is connected 4 Insert the CD containing the Ecotech 9800 Analyzer Driver into the CD drive The computer should recognise the CD and continue with the installation after a few seconds If it does not click the Next button after loading the CD NOTE A dialog box similar to that in Figure 4 6 may appear If it does click the Continue Anyway button Hardware Installation The software you are installing for this hardware Ecotech 9800 Analyser has not passed Windows Logo testing to verify its compatibility with Windows XP Tell me why this testing is important Continuing your installation of this software may impair or destabilize the correct operation of your system either immediately or in the future Microsoft strongly recommends that you stop this installation now and contact the hardware vendor for software that has passed Windows Logo testing Continue Anyway STOP Installation Figure 4 6 Dialog Box which may appear during installation 98417600 Rev E 4 27 EC9841 NOx ANALYZER OPERATION MANUAL 5 The installation should now proceed When complete click th
123. n accordance with this operation manual o The following menu selections must be used INTERFACE MENU ANALOG OUTPUT MENU RANGE 0 05 PPMtO 1 0 PPM OVER RANGING ENABLED or DISABLED INSTRUMENT MENU MEASUREMENT MENU FILTER TYPE KALMAN NO2 FILTER DISABLED CALIBRATION MENU CALIBRATION MANUAL Or TIMED SPAN COMP DISABLED 98417600 Rev E 98417600 Rev E CHAPTER 1 DESCRIPTION TEST MENU PRES TEMP FLOW COMP ON DIAGNOSTIC MODE OPERATE o TheService switch must be positioned to IN The EC9841B series is U S EPA equivalent with the following options or equivalent o exhaust scrubber o valve assembly for external zero span EZS o rack mount assembly o 50 pin connector PCA Standard in A series o internal zero span assembly IZS 1 5 EC9841 NOx ANALYZER OPERATION MANUAL This page is intentionally left blank 1 6 98417600 Rev E CHAPTER 2 INSTALLATION amp OPERATION 2 0 Installation and Operation 2 1 Mechanical Installation Note Before installation the unit should be checked to ensure that the instrument arrived undamaged The EC9841 Service Manual contains initial installation inspection instructions 2 1 1 Selecting a Location Select a location for the analyzer where temperature variation dust and moisture are minimal The location should be we
124. n until Interface Mode is highlighted 6 Click select 7 Click up or down to change the interface mode to Command 4 6 3 Settings Open the Settings dialog box by either clicking the button choosing the Comm Settings menu option or by pressing F2 Click on one of the icons on the left of the dialog box to access that tab 4 6 3 1 Output This function sets the options for the text file the program downloads data to Output file 98417600 Rev E 4 3 EC9841 NOx ANALYZER OPERATION MANUAL Enter the path and filename of the text file that the EC9500 Communicator will write acquired data to Clear the text box if a text file is not required If the file exists Choose Append to have the data added to the end of an existing file choose overwrite to have an existing file overwritten or choose Prompt to have the user prompted before writing to an existing file Date format Choose the date time format or the user can select their own in which to record the date and time of the analyzer data 4 6 3 2 Connection This function sets the options for the communication connection between the computer and the analyzer Connection type Choose the type of connection to communicate with the analyzer The choice changes the other options available in this tab 4 6 3 2 1 Direct Serial Connection Port Choose the COM port on the computer where the serial cable is connected Connect the other end of the serial cable to the analyzer
125. nces between the NO and NO gas channels NOISE The standard deviation of the concentration The manner in which this is done is as follows 1 Take a concentration value once every two minutes 2 Store 25 of these samples in a first in last out buffer 3 Every two minutes calculate the standard deviation of the current 25 samples This is a microprocessor generated field and cannot be set by the operator Note The noise reading is only valid if zero air or a steady concentration of span gas has been supplied to the analyzer for at least one hour NO OFFSET NO ZERO calibration correction factor User can manually set the offset between 10 00 PPB NO2 OFFSET NO2 ZERO calibration correction factor User can manually set the offset between 10 00 PPB 2 5 5 Calibration Menu The CALIBRATION MENU contains entries used to calibrate the instrument The choice of TIMED or MANUAL calibration displays a slightly different screen TIMED calibration generates a zero span check that occurs at a chosen interval without operator intervention MANUAL calibration allows for operator controlled calibration Only one choice TIMED or MANUAL applies at any given time 98417600 Rev E CHAPTER 2 INSTALLATION amp OPERATION 2 5 5 1 Timed Calibration The following screen appears when CALIBRATION TIMED is selected CALIBRATION MENU CALIBRATION TIMED TIMER INTERVAL 24 HOURS STARTING HOUR
126. ng the 6 keys available on the front panel to the right of the display screen The key functions are described below a p o Cy 4 v LSE LSE E xit m Figure 2 5 Analyzer Keyboard The key functions are listed below Up arrow key Moves the cursor to the previous menu item or in an input field moves the cursor to the next choice or increments the digit in a numerical field Down arrow key Moves the cursor to the next menu item or in an input field moves the cursor to the next choice or decrements the digit in a numerical field Select Selects the menu choice or selects the field for input Pg Up Moves the cursor to the previous page or screen Exit Leaves a field without making a change or returns the cursor to the main screen Enter 1 Confirms a menu item or a field selection to the microprocessor 2 3 2 Using the Menu and Making Entries The EC9841 analyzer is programmed with a series of menus that allow the operator to view parameters such as those generated by the microprocessor or to enter digital parameters when appropriate or to select from among the choices displayed 98417600 Rev E CHAPTER 2 INSTALLATION amp OPERATION The cursor is displayed as a movable highlighted area of text Letters appear as the opposite of the rest of the text on the screen 2 3 2 1 Screen Fields Screen fields that allow input are of two types o Choice fields Contain
127. nt s SPAN COMP is ENABLED the EC9841 automatically and continually compensates subse quent concentration measurements for any minor calibration drift as follows NO gran fazsno XENO uncome Equation 3 0 21 NO Jean f AZsNO x NO loncome X Equation 3 0 22 where and NO 44p corrected instrument concentration readings based on the span compensation ratio obtained during the previous AZS cycle fazsno and fazsnoo NO and NO span compensation ratios determined during the previous AZS cycle The default value of both ratios is 1 000 until the first AZS cycle is carried out NO uncomp and NO uncomp the instrument concentration readings without compensation During an AZS cycle the EC9841 measures the concentration of the span gas provided to the span gas port The measurement reading should equal the actual concentration of the span gas standard If it does not the instrument sets NO zap equal to NO and calculates a new as follows NO stp AZS NO NO uncome Equation 3 0 23 NO Isto NO UNCOMP AZSNO Equation 3 0 24 98417600 Rev E CHAPTER 3 CALIBRATION where NO orp or NO3 srp the certified concentration of the span gas standard at the span gas port The new value of is then used to compensate subsequent measurement readings until the next AZS cycle
128. oltmeter DVM 1 Enter the INTERFACE MENU and choose ANALOG OUTPUT MENU 2 Select RANGE and enter the desired range by selecting the appropriate digits Press lt Enter gt to confirm your choice 3 Set the output type according to the termination selected for the discrete I O connector The choice will be either CURRENT VOLTAGE If current output is desired and the 50 pin board is installed set the selection jumper to CURRENT and de select all voltage ranges If current output is desired and the 50 pin board is not installed no hardware change is required If voltage output is desired and the 50 pin board is installed set the selection jumper to VOLTAGE If voltage output is desired and the 50 pin board is not installed an external termination resistor is required This resistor must be 50 ohms per full scale voltage desired 50 ohms 1 v full scale 500 ohms 10 v full scale etc 4 If voltage output type was selected choose the desired OFFSET and press Enter If current output type was selected choose the desired output range and press Enter 2 41 EC9841 NOx ANALYZER OPERATION MANUAL 5 Select ZERO ADJUST and adjust the analog output to the selected offset position for zero concentration i e if 10 OFFSET is selected position the recorder pen or DAS at 10 of full scale To make the adjustment watch the recorder paper or DAS while you increment or decrement the
129. om occupied areas Warning After removal of power from the EC9841 the exhaust should be maintained for approximately 15 minutes to purge the exhaust of ozone and prevent possible combustion of the charcoal Optional exhaust pump and exhaust scrubber are available from Ecotech 2 2 AC Power Connection Verify that the power selection switch on the rear panel and the power cord and fuse are appropriate for your use Move the switch right or left so the appropriate voltage rating is visible on the switch Figure 2 1 above shows the voltage selection switch Warning Power is supplied to the analyzer through a three pin power plug The ground must not be defeated and an adequate ground must be connected to the instrument both for proper performance and for the safety of operating personnel The warranty on the analyzer applies only if the analyzer is properly grounded If it is not properly grounded and electric power is applied in violation of the national electric code Ecotech assumes no responsibility for any injury or damage to personnel or property Warning Be sure to check that the mains power selection switch is at the correct setting before turning the instrument on Failure to do so may result in damage to the power supply 98417600 Rev E 2 7 EC9841 NOx ANALYZER OPERATION MANUAL Connect the power plug to the power receptacle and press the power switch to the ON position on the rear panel Also make sure that the DC POWE
130. ommand will cause the response lt NAK gt BAD BLOCK CHECK lt CR gt lt LF gt If a Bavarian command is sent without a set of matching lt 5 gt and lt ETX gt characters it will cause the response lt NAK gt BAD STX ETX PAIR lt CR gt lt LF gt 98417600 Rev E CHAPTER 4 DIGITAL COMMUNICATION 4 4 3 12 Enhanced Protocol Idiosyncrasies The string DA lt cR gt is a valid command o DA command will function without an I D o The data type must be sent on 9800 style commands but it is not checked against the actual parameters o The number of data parameters must be sent on 9800 style commands but it is not checked against the actual parameters 4 4 4 Establishing Communications The first step in establishing communications with the EC9841 is to connect a computer or terminal to one of the instrument s RS232 serial ports as specified in section 4 2 1 The default serial configuration for either serial port is 2400 8 N 1 2400 baud 8 bits no parity and one stop bit If you need to change the serial configuration from the default use the INTERFACE MENU Once the instrument has been connected place the instrument in Command mode by entering the INTERFACE MENU via the front panel and selecting COMMAND as the INTERFACE MODE Then using a communication package such as HYPER TERMINAL establishes communications with the instrument To test the communication conne
131. on generated Plot the analyzer s NO response in ppm versus 1 F and determine the slope Srp Calculate the permeation rate R ug min from Ssrp Kx Suis Equation 3 0 19 where 0 532 ul NO ug NO at 25 C and 760 torr 760 torr 101 kPa 98417600 Rev E 3 29 EC9841 NOx ANALYZER OPERATION MANUAL 3 10 2 2 NO Working Standard Traced to NIST NO Standard Use the NIST traceable NO standard and GPT calibration procedure to calibrate the NO NO and NO responses of the analyzer Refer to the GPT calibration procedure for exact details Generate several NO concentrations by diluting the working NO standard to give on scale NO responses Measure the total flow at the manifold F slpm for each NO concentration generated Plot the analyzer s NO response versus 1 F and determine the slope Ssrp Calculate the permeation rate R ug min from R Ssrp K Equation 3 0 20 where 0 532 pl NO ug NO at 25 C and 760 torr 760 torr 101 kPa 3 10 2 3 Comparing NO and NO Working Standards To compare the working NO standard to a certified NO working standard follow the procedure outlined in section 3 10 1 2 above for certifying an NO working standard against a NIST traceable NO standard The NO span adjustment must take into account any NO impurity in the NO working standard To make a comparison between a working NO standard and a certified NO standard follow the certification
132. on with the PINID command 05 d H D byte bit 7 Used in conjunction with the PINID command USER ID byte bit 8 Used in conjunction with the PINID command Active output indicates that the sample flow is less than 0 1 slpm Active output indicates that the lamp has failed Note 6 98417600 Rev E Signal Name CHOPFAIL SPAN OOR EOC1 HEAT ERFAIL SYSFAIL PS FAIL HV FAIL EOC2 EST ELECTST POWER ON SPDRVR1 AGND DGND PGND CGND 12V 98417600 Rev E CHAPTER 4 DIGITAL COMMUNICATION Number Function 37 Active output indicates that the chopper has failed Note 7 38 Active output indicates that the span ratio is out of range Note 8 39 Spare open collector output 1 40 Active output indicates that a system heater has failed Note 9 41 Spare open collector output 2 42 Active output indicates that the system has been put into the Optic Test mode 43 Active output indicates that the system has been put into the Electric Test mode 44 Active output indicates that the 12 volt supply voltage has gone out of range Note 10 45 Active output indicates that the PMT high voltage supply has failed Note 11 46 The sum of all failures in the instrument Note 12 47 Active output indicates that power to the analyzer is on 48 Spare Driver 1 1 14 16 Ground reference for analog outputs 12 13
133. oncentration generated by GPT 3 6 Multipoint Calibration Procedure Alternative A NO Concentration Standard and GPT The procedure for calibrating the EC9841 nitrogen oxides analyzer is customized from the GPT procedure prescribed in 40 CFR Part 50 Appendix F Before beginning a multipoint calibration of the instrument read section 3 8 below Note Calibration should only be performed when the in strument is stable and has been powered up for at least 2 hours 3 6 1 Preparation 1 A qualified service technician must perform the periodic maintenance procedures in the EC9841 Service Manual Check the SYSTEM FAULTS INSTRUMENT STATUS and SYSTEM T analyzer is in good working condition EMP ERATUR ES screens to verify that the 2 Prepare a GPT calibration system as shown in Figure 3 1 and discussed in section 3 8 3 Ensure that the analyzer is properly connected to the output recording device as described in the discussion of recorder and DAS connections found in Chapter 2 Installation and Operation If necessary go to the INTERFACE MENU select the ANALOG OUTPUT MENU and select the appropriate settings for the NO NOx and NO recording devices Offsetting the analyzer s zero indication OFFSET and ZERO ADJUST to 5 of scale is recommended to facilitate observing negative zero drift on the NO channel Exit and return to the primary screen 98417600 Rev E
134. ons sample 2 6 Connections serial essen 4 5 D DAS connections 2 2 Data Log cine eret a 2 31 Date and time setting sssssssss 2 11 Diagnostic Menu seeeeeeree 2 26 Diagnostic Menu 2 26 Digital communication sese 4 1 Discrete comtrol 5 5 nude eet 4 1 Display adjustment seen 2 8 E Enhanced protocol ccesccsesceceeeeeeneeceneeeeeeeeee 4 12 Event Log illustration esses 2 33 Event Log sereen eie i in 2 33 Exhaust connections sessssseeeeerene 2 6 G GPT calibration sess 3 15 I Illustrations 50 Pin Connector Board with Sample CHOICES cse eerta tees es 2 4 Illustrations Analog Output Menu 2 29 2 31 Illustrations Analog Output Menu Current 2 29 Illustrations Analog Output Menu Voltage 2 30 Illustrations Analyzer Keyboard 2 10 Illustrations Analyzer Rear Panel 2 2 Illustrations Cable Connections 4 6 Illustrations Calibration Apparatus with NO2 Permeation Tube sss 3 14 Illustrations Diagnostic Menu 2 26 Illustrations Event Log eee 2 33 Illustrations Instrument Menu 2 17 Illustra
135. optional 98417600 Rev E 2 1 EC9841 NOx ANALYZER OPERATION MANUAL xu 2 Q Figure 2 1 Analyzer Rear Panel 2 1 2 1 Recorder and DAS Connections Caution The EC9841 electrical ground is isolated from earth ground To avoid possible ground loops all electrical devices connected to the analyzer should have floating inputs not connected to earth ground 2 1 2 1 1 50 Pin I O PCA The 50 pin connector board plugs into the discrete I O connector and provides voltage and current outputs to drive a strip chart recorder REC and a data acquisition system DAS The outputs are illustrated in Figure 2 2 The 50 pin I O PCA is optional for the EC9841 B series analyzer 2 2 98417600 Rev E CHAPTER 2 INSTALLATION amp OPERATION 8 8 8 Figure 2 2 Optional 50 Connector Board Front The output is jumper selectable as o Current see the example in Figure 2 3 Range is set using the menu in a later step o Voltage with selectable ranges of 0 to 0 1 v 0 to 1 v 0 to 5 v and 0 to 10 v See the example in Figure 2 3 98417600 Rev E 2 3 EC9841 NOx ANALYZER OPERATION MANUAL 2 4 Figure 2 3 50 Pin Connector Board with Sample Choices Rear Select the output for your application using the following steps Remove the 50 pin connector board from the rear panel of the analyzer Place the jumpers on the p
136. or the last 100 instantaneous NO readings NOXCONC for the last 100 instantaneous NOx readings 2 for the last 100 instantaneous NO2 readings GASAVG for the last 100 averaged NO readings NOXAVG for the last 100 averaged NOx readings NO2AVG for the last 100 averaged NO2 readings PRESSURE for the last 100 cell pressure readings FLOW for the last 100 flow readings REF for the last 100 reference readings SPANCMP for the last 100 span compensation readings from AZS cycles ZERO for the last 100 zero readings from AZS cycles CNVTR for the last 100 converter temperature readings Device response INDEX lt SPACE gt PARAMETER CR LF where INDEX is the index into the trend buffer 0 oldest point 99 newest point 98417600 Rev E CHAPTER 4 DIGITAL COMMUNICATION Formatted as an integer PARAMETER 15 the requested data in floating point format Command DZERO Function Commands the unit under test to enter the zero mode and stay there Format DZERO DEVICE I D gt TERMINATOR Device response lt ACK gt if the unit under test is able to perform the command lt NAK gt if not Command PINID Function Programs the 50 pin device ID Format PINID DEVICE I D gt 1 1 BBBBBBBB TERMINATOR where BBBBBBBB is the desired bit pattern in binary format to be programmed into the device ID The most significant b
137. otech data downloading software mentioned in section 4 6 AVERAGE DATA If the average data is set to off no average data is recorded If it is set to on then the average data displayed on the primary screen is recorded The averaging period of this data is set in the MEASUREMENT MENU INST DATA The INST DATA option allows you to select either off where no data is recorded or record instantaneous data with the following intervals 1 HOUR 30 MINUTES 10 MINUTES 5 MINUTES 3 MINUTES OR 1 MINUTE TOTAL CAPACITY When either of the above is set to on the amount of free memory available for data logging will be displayed in days This indicates how much data can be stored before the earliest data will start to be overwritten Inst Data Total Capacity min days ERASE LOGGED DATA When yes is selected and enter is pressed all the logged data will be erased 2 5 16 Network Adaptor Menu The Network Adaptor Menu allows the user to enter or change the I P address Netmask and Gateway NETWORK ADAPTER MENU I P ADDRESS 0 0 0 0 NETMASK 0 0 0 0 GATEWAY 0 0 0 0 2 34 98417600 Rev E CHAPTER 2 INSTALLATION amp OPERATION 2 5 17 Trend Select Menu TREND SELECT MENU is the graphic display of the parameters listed TREND SELECT MENU NO CONCENTRATION NOx CONCENTRATION NO2 CONCENTRATION NO AVERAGE NOx AVERAGE NO2 AVERAGE ZERO OFFSET
138. ration The zero air required for the generation of calibration atmospheres and for zero checks of the analyzer must be free of NO NO O and water which will cause a detectable response on the analyzer Water can be removed by using a silica gel or calcium sulfate drying agent It is useful to purchase drying agents with an indicator so you can know when they are depleted After drying zero air can be obtained in two ways 1 Oxidation and scrubbing NO in the air source is oxidized to NO by passing it through a chamber containing an ozone generating lamp The products of the oxidation are then absorbed through activated charcoal The air obtained by this process is filtered to remove charcoal particles before being used 2 Chemical oxidation NO in the air source is oxidized to NO using a purafil chromate agent on alumina support material The same filtering process as shown in A is used This alternative has the benefit of not requiring any electrical power to operate an ozone lamp 3 3 Calibration and Zero Span Check Schedule 98417600 Rev E The analyzer must be calibrated initially and periodically to determine the reliability and accuracy of all air quality data collected and to alert you if the accuracy or reliability of the data is unacceptable Factory zero span data is sup plied on the Final Test Sheet provided with each analyzer Calibration is necessary before using the analyzer to perform sample measurements The table
139. ratus and procedures apply when handling a reactive toxic gas such as NO even at concentrations of 50 to 100 ppm It is imperative that the integrity of the NO standard be maintained when the gas is transferred from the pressurized cylinder to the reaction chamber In addition precautions must be taken to assure that the gas does not leak to the surroundings during the transfer The need for cleanliness in the NO pressure regulator and associated gas delivery system cannot be overemphasized Some of the problems of NO impurity in the calibration system have been traced to the conversion of the standard NO to NO by oxygen or other contaminants trapped in the standard cylinder Refer to section 3 4 3 for the proper purging procedure of the pressure regulator 3 8 5 2 Zero Air Source Purified cylinder or compressed air is suitable for the zero air however if large volumes of zero air are required for the calibration or especially if continuous operation is desired purified compressed air is preferred The zero air must be free of contaminants such as NO NO O or reactive hydrocarbons that will cause a detectable response on the NO or NO channels of the analyzer or that might react with either NO or NO in the calibration system To meet those speci fications the air can be purified by passing it through silica gel for drying treating it with ozone to convert any NO to NO and passing it through a mixture of activated charcoal 6 14 mesh
140. rce of span calibration gas to the analyzer through the Inlet port see the remainder of this section for instructions on preparing calibration gas Allow the analyzer to sample the gas until a stable reading is obtained typically 15 minutes From the primary screen start the calibration sequence by pressing either the Up or Down arrow key A or until the display prompts START MANUAL CALIBRATION Pressing the lt Select gt key will allow you to choose from NO SPAN or ZERO Confirm that the display reads SPAN and press Enter 1 A backlit cursor will be displayed on the NOx move it to the NO concentration display Use the lt Select gt key to move the position of the backlit cursor and the Up and Down arrow keys to increment and decrement the value of the backlit digit until the span calibration gas concentration value is displayed When the desired concentration is displayed press lt Enter gt Now repeat steps 2 4 using the NO field in place of the NO field Note When an instrument gain is altered and differs to the other gain by more than 10 the other gain will be automatically altered to match that of the gain being changed If the first NO instrument gain that is configured automatically changes when the second instrument gain NOx is set the instrument is not operating properly and should be serviced likely cause Molycon converter Next the efficiency of the converter must be determined Follow
141. rity in the standard NO cylinder in ppm 3 9 Guidelines for Calibration Using NO Permeation Devices 3 9 1 Principle In a permeation device an easily liquefiable gas such as NO is condensed inside an inert container all or part of which is constructed from a polymeric material often Teflon Gas escapes from the container by dissolving in and permeating through the polymer walls at a temperature dependent rate The rate of gas effusion in ug min at a constant temperature can be established by gravimetric determination of the weight loss of the permeation device over a known period of time In this calibration procedure the NO and NO responses of the chemilluminescence analyzer are first calibrated with an NO standard Next accurately known concentrations of NO are produced dynamically by diluting the effusion from an NO permeation device with various flows of clean air to obtain a calibration for NO Either the NO permeation device or the NO source may be chosen as the reference standard for calibration the remaining standard must be assayed against the reference standard for consistency 3 9 2 Components of a Permeation Device Calibration System 98417600 Rev E Figure 3 2 shows a diagram of a typical permeation device calibration system Such systems have been described in the literature and are commercially available All connections between components in the system should be glass Teflon or other nonreactive material
142. rmining NO Impurity in the NO Cylinder eerte eene 3 22 3 8 8 Helpful Formulas for Calibration by essent 3 22 3 9 GUIDELINES FOR CALIBRATION USING NO PERMEATION DEVICES 3 23 98417600 Rev E FRONT MATTER 3 9 I Principl s aas eaae d Rer beate e e e EE eh AA AT 3 23 3 9 2 Components of a Permeation Device Calibration eese 3 23 3 9 3 Constant Temperature Chamber aie Ree e ep a ee eite e Ro ee Beet i0 3 24 3 9 4 Flush Gas for the Permeation 3 25 3 9 5 Standard NO Permeation Devices eese 3 25 3 9 6 Basic Design Considerations for a Calibration System essere 3 26 3 10 CERTIFICATION OF WORKING STANDARDS AGAINST NIST TRACEABLE STANDARDS 3 26 3 10 1 NO Working Standards Traced to NIST Standards eese eterne 3 27 3 10 2 NO Working Standards Traced to NIST lt 3 29 3 11 CALIBRATION REQUIREMENTS WHEN OVER RANGING IS EMPLOYED cessere ener 3 30 3 12 AUTOMATIC ZERO SPAN CHECKS AZS 3 31 IT 3 34 3 12 2 Description of the AZS Process ss ae e en tee Decided edes 3 55 3 13 CALIBRATION REEERENGCES ro re ee ERU Fe RO TRE
143. rol function resumes Changes made from this menu are for diagnostic and test purposes only MEASUREMENT GAIN Entries are software controlled settings of 1 2 4 8 16 32 64 and 128 This is the setting of the variable gain amplifier on the preprocessor PRES TEMP FLOW COMP Choices are ON or OFF OFF is used when running diagnostics to see pressure or temperature effects on readings ON is used to compensate for automatic pressure and temperature compensation of sample DIAGNOSTIC MODE Allows the operator to choose OPERATE OPTIC ELECT Or PREAMP During measurement set to OPERATE During diagnostic testing choose the desired system to be diagnosed OZONATOR Choices are ON or OFF ON is normally used OFF is used to perform maintenance procedures CONTROL LOOP Allows the operator to choose ENABLED Or DISABLED When ENABLED is selected the microprocessor maintains control of the digital pots when DISABLED is selected the microprocessor does not control the digital pots and the user can manually adjust the digital pots When CONTROL LOOP is ENABLED the microprocessor will take control of the pots at the point at which the pots were 98417600 Rev E 2 25 EC9841 NOx ANALYZER OPERATION MANUAL last set Control loops will be reset to ENABLED when the primary screen is displayed TEST MEASURE Software controlled pot that is used by techn
144. s to the menu structure using a terminal and also includes a library of other specific operations USB provides a simple way to monitor the current state of the analyzer and download data that has been logged to the internal FLASH memory 4 1 Discrete Control Two control inputs are available through the 50 pin I O connector They are DOZERO and These inputs will place the analyzer in either Zero mode or Span mode respectively the analyzer will remain in the selected mode while the input is active When these inputs are made active the analyzer will actuate the valve drivers selected in the CALIBRATION MENU for CALIBRATION INTERNAL EXTERNAL All other discrete connections are status outputs from the analyzer 4 1 1 50 Pin I O Functional Specification 98417600 Rev E The 50 pin connector on the back of the instrument will have functions assigned to pins per the following table Note 1 Signal Name Number Function 10UT3 2 Analog current output 3 Note 2 DOZERO 5 External input to put the instrument into the zero mode DOS PAN 6 External input to put the instrument into the span mode OVERANGE1 7 Active output indicates that analog output 1 has gone into over range OVERANGE2 8 Active output indicates that analog output 2 has gone into over range OVERANGE3 9 Active output indicates that analog output 3 has gone into over range ANAIN1 10 Unused analog input
145. ses all subsequent readings to be incorrect A built in check verifies that the observed value is not different from the calibration value by more than 25 If it is no correction is made and an error message is sent to the EVENT LOG setting the CALIBRATION ERROR flag 7 The number displayed after No SPAN RATIO and NO2 SPAN RATIO is the factor by which the instrument gain gains are multiplied to cause the display and output to agree with the span gas You cannot set this number This value is set to 1 000 any time the span is set manually via the front panel The assumption is that front panel adjustment is an instrument calibration thus preventing compound adjustments 3 12 2 Description of the AZS Process 98417600 Rev E The instrument will initiate a full zero span cycle starting at the prescribed hour The valve to admit zero air will be opened and the sample valve closed The instrument will allow the cell to fill with the zero gas for 12 minutes The display and outputs are updated with the actual instrument reading during the entire zero cycle The zero value is for user reference only and is never used by the analyzer to compensate readings At the end of 12 minutes the zero air valve is closed and the span gas valve is opened admitting the span gas for 12 minutes The display and outputs are updated with the actual instrument readings during the entire span cycle The current value at the end of the span cycle
146. ses in the reaction chamber in minutes concentration of the undiluted NO standard in ppm Fso NO flow rate in slpm Fo generator air flow rate in slpm Veco volume of the reaction chamber in liters 3 8 6 2 Flow Conditions The flow conditions to be used in the GPT system are determined by the following procedure 3 20 98417600 Rev E CHAPTER 3 CALIBRATION 1 Determine the total flow required at the output manifold analyzer demand plus 10 to 50 excess 2 Establish NO as the highest NO concentration ppm that will be required at the output manifold should be approximately equivalent to 90 of the URL of the NO concentration range to be covered 3 Determine Fy as NO ou x Fr NO erp NO Equation 3 0 10 4 Select a convenient or available reaction chamber volume Initially a trial Vgc may be selected to be in the approximate range 0 2 to 0 5 liters 5 Compute Fo as F JINOl X Fy X Vre n 2 75 E Equation 3 0 11 6 Compute t as RC Eyt Fug tr Equation 3 0 12 7 Verify that tx is less than two minutes If not select a reaction chamber with smaller Vac 8 Compute the diluent air flow rate as F F F D T 9 NO Equation 3 0 13 where F is the diluent air flow rate in slpm 98417600 Rev E 3 21 EC9841 NOx ANALYZER OPERATION MANUAL If Fo turns out to
147. steps 2 4 above replacing the NO standard with an appropriate converter gas i e Use the readings on the screen and the known concentrations delivered to the instrument to calculate the converter efficiency NO measure NO expected Next move the cursor to the CONVERTER EFFICIENCY field If the converter efficiency is known to be other than 10046 program this value and press Enter otherwise press lt Enter gt Press Exit to return to the primary screen This completes the span calibration of the EC9841 analyzer 98417600 Rev E 3 3 EC9841 NOx ANALYZER OPERATION MANUAL Note The auto zero function of the EC9841 eliminates the need for a traditional zero calibration 3 2 Multipoint Calibration and Zero Span Check Two alternative methods for dynamic multipoint calibration are specified in 40 CFR Part 50 Appendix F o Alternative A Gas phase titration GPT of an NO standard with O to generate known concentrations of NO 3 Alternative B NO permeation tube and a dynamic dilution system to produce known concentrations of NO Both methods provide reliable results when correct calibration procedures are fol lowed Experience has shown however that NO permeation tubes may become unreliable if not handled properly Furthermore the conditions that contribute to the degradation of the tubes are not well understood at this time so care should be exercised by those using Alternative B for calibra
148. still provides current outputs to drive a strip chart recorder or DAS These outputs are present on the discrete I O connector at the following pins Function Pin 50 Pin I O Connector Current Out NO 15 Current Out NOx 17 Current Output NO 2 DGND Gnd 1 12 14 or 16 If a current output is connected the range must also be chosen from the menu when the instrument is operating The compliance voltage for the current output is 12 v A terminating resistor of 600 ohms or less should be used for measurement errors no greater than 1 2 1 2 1 3 Voltage Output Connections The current output mentioned above can be converted to a voltage output by adding a terminating resistor across the output This resistor must be 50 ohms per full scale voltage desired 50 ohms 1 v full scale 500 ohms 10 v full scale etc Following is a list of typical output ranges and required terminating resistance 98417600 Rev E 2 5 EC9841 NOx ANALYZER OPERATION MANUAL Desired Output Volts Terminating Resistance Ohms 10 Volts 500 Ohms 5 Volts 250 Ohms 1 Volt 50 Ohms 0 1 Volt 5 Ohms When using voltage output the source resistance is 1000 ohms The recorder or DAS input resistance should be greater than 500K ohms for a measurement error no greater than 1 2 1 2 2 Sample Gas Connections Caution Sample and zero air connections to the EC9841 should be maintained at ambient pressure
149. t DCE per the EIA standard RS232 4 5 EC9841 NOx ANALYZER OPERATION MANUAL 4 2 2 Cable Connections Figure 4 2 Serial Interface Connection Diagrams 4 3 Serial Terminal Control If the EC9841 is operated in the Terminal mode a terminal connected to one of the RS232 ports will produce the same results as pressing the six front panel keys with the exception that the same characters sent to the LCD instrument display will also be sent to the terminal The terminal keys will map into the front panel keys as follows 98417600 Rev E CHAPTER 4 DIGITAL COMMUNICATION Key Key Label Function Enter ENTER enter 7 exit 9 PG UP page up 8 UP ARROW up 2 DOWN ARROW dow 6 RT ARROW select The Terminal mode must not be used if the multidrop port is daisy chained to other instruments The mode may be changed using the INTERFACE MENU through the INTERFACE MODE menu selection When in Terminal mode this choice may be made manually or through the serial port The mode may be changed from Command to Terminal through the serial port using the REMOTE command For information on required communication parameters refer to the REMOTE command in section 4 4 5 2 4 4 Serial Command Control When in the Command mode two command sets are available These are the 9800 command set and the Bavarian Network command set The 9800 command set is recommended for general use Th
150. t ee gt lt SP gt lt ss gt lt SP gt lt ff gt lt SP gt 00000000 lt SP gt lt mmm gt lt SP gt lt pppptee gt lt SP gt lt ss gt lt SP gt lt ff gt lt SP gt 00000000 lt SP gt lt ETC gt lt BCC1 gt lt BCC2 where NO concentration ss DO D1 D2 D3 D4 D5 D6 D7 ff DO D1 D2 D3 D4 D5 status byte for both channels with the following bit map positive logic instrument off out of service instrument is in zero mode instrument is in span mode unused unused units 1 ppm 0 mg m3 unused failure byte for both channels with the following bit map positive logic flow sensor failure instrument failure unused unused lamp failure temperature sensor failure 98417600 Rev E CHAPTER 4 DIGITAL COMMUNICATION D6 unused D7 unused kkk NOchannel ID mmm NO instrument ID pppptee instantaneous NOx gas concentration in ppb or mg m3 BCC1 first byte of the block check calculation BCC2 second byte of the block check calculation The block check calculation is performed by clearing the block check number An iterative EXCLUSIVE OR is performed on this number with every character in the message from the lt 5 gt to the lt ETx gt inclusive The resulting value is converted in a two digit pseudo hex number and sent out as 1 and BCC2 Command PI Function Bavarian network command that sets th
151. the previous entries 2 3 3 Setting the Date and Time Before the instrument can be calibrated or collect data for regulatory use the time and date must be set Go to the INSTRUMENT MENU and select DATE and TIME If these are not already set use a 24 hour clock setting for time and set the date in 98417600 Rev E 2 11 EC9841 NOx ANALYZER OPERATION MANUAL the day month year format See section 2 5 for instructions on programming menu entries 2 4 Analyzer Calibration 2 12 When the EC9841 analyzer is powered on for the first time the analyzer must be calibrated to ensure accurate measurements The analyzer does not require recalibration after further power interruptions or resets However if the instrument is transported to a new location or maintenance work is performed the instrument may require re calibration To determine weather the instrument requires a calibration a precision check can be performed as discussed in the following sections 2 4 1 Precision Checks A precision check is a Level 2 calibration as discussed in section 3 12 This means that the instrument is only checked against a know calibration source and is not adjusted A precision check can be performed either manually or automatically 2 4 2 Automatic Most modern air quality monitoring systems have data acquisition systems which can automatically initiate and record the results of a daily precision check The means by which the analyzer
152. ting NO analyzers Analyzers that require calibration of NO or NOx channels must use an NO standard and dynamic dilution system to generate known concentrations Both alternatives require the use of an NO calibration gas to determine the efficiency of the analyzer s NO to NO converter Only Alternative A GPT is described in detail in this section and is recommended for calibrating the analyzer A brief description of Alternative B is given but use of an NO permeation tube is recommended only for span checks Note For more detail on either alternative see Reference 2 section 3 13 Dynamic multipoint calibration of the analyzer requires an NO and an NO source that provides at least six concentration levels in addition to zero air Zero and span checks must include zero air and at least one NO span gas concentration If a source other than the dynamic calibration source is used the span gas concentration should be referenced to the dynamic multipoint calibration 3 4 98417600 Rev E CHAPTER 3 CALIBRATION 3 2 1 Interface Connections All fittings valves pneumatic lines and other components that make contact with the span gas must be made of Teflon borosilicate glass or stainless steel Inaccurate calibrations may result when other materials are used The zero span gas and sample pressure at the analyzer sample inlet must not exceed that normally experienced due to variations in ambient pressure 3 2 2 Zero Air Gene
153. tion curve If desired compute the NO calibration relationship 3 8 Guidelines for Calibration Using GPT 3 8 1 Principle This calibration technique is based on the rapid gas phase reaction between NO and O to produce stoichiometric quantities of NO in accordance with the equa tion NO 0O gt NO 0 The quantitative nature of this reaction is such that when the NO concentration is known the concentration of NO can be determined Ozone is added to excess NO in a dynamic calibration system and the NO channel of the analyzer is used as an indicator of changes in NO concentration With the addition of O the decrease in NO concentration observed on the calibrated NO channel is equivalent to the concentration of NO produced The amount of NO generated may be varied by adding variable amounts of O from a stable uncalibrated O generator 3 8 2 Preliminary GPT Design Considerations In setting up the apparatus some general considerations are important First determine the minimum total flow required at the sample manifold This flow is controlled by the number of analyzers and the sample flow rate demand of the individual analyzers to be connected to the manifold at the same time Allow at least 0 5 slpm in excess of the required total flow 98417600 Rev E CHAPTER 3 CALIBRATION The operational characteristics of the ozone source put limitations on the maximum flow F of the calibration system The Ecotech GasCal
154. tion of the STATUS WORD Command DAZSC Function Commands the addressed device to perform a zero span cycle The system returns to the measure mode when the cycle has completed Format DAZSC DEVICE I D TERMINATOR 98417600 Rev E CHAPTER 4 DIGITAL COMMUNICATION Device response lt ACK gt if the unit under test is able to perform the command lt NAK gt if not Command DCOMM Function Performs a character dump to the serial output when called Format DCOMM DEVICE I D gt TERMINATOR Device response lt ACK gt if the unit under test performs a successful loopback lt NAk gt if not Command DCONC Function Sends the current instantaneous concentration data to the serial port Format DCONC DEVICE I D gt TERMINATOR Device response NO SPACE NOX lt SPACE gt NO2 lt SPACE gt STATUS WORD lt CR gt lt LF gt All numbers are in floating point format The STATUS WORD indicates the instrument status in hex using the following format Bit 15 MSB SYSFAIL Bit 14 FLOWFAIL Bit 13 LAMPFAIL Bit 12 CHOPFAIL Bit 11 CVFAIL Bit 10 COOLERFAIL Bit 9 HEATERFAIL Bit 8 REFFAIL Bit 7 PS FAIL Bit 6 HV FAIL Bit 5 OUT OF SERVICE Bit4 instrument is in zero mode Bit 3 instrument is in span mode Bit 2 unused 98417600 Rev E 4 19 EC9841 NOx ANALYZER OPERATIO
155. tions Instrument Status Screen 2 33 Illustrations Interface Menu 2 21 2 28 Illustrations Main Menu 2 17 Illustrations Manual Calibration 2 22 Illustrations Measurement Menu 2 19 Illustrations Output Test Menu 2 24 Illustrations Over Range as Seen on a Strip Chart Recorder edite pneter rte 2 38 Illustrations Preprocessor Pots Menu 2 24 Illustrations Status Output Connections 4 5 Illustrations Strip Charts Illustrating Offset 2 37 Illustrations System Faults Screen 2 35 Illustrations System Temperatures Screen 2 34 Illustrations Test Menu eee 2 23 Illustrations Timed Calibration Menu 2 21 Illustrations Typical GPT Calibration System SCHEMA ud eicere he 3 8 Illustrations Valve Test Menu 2 25 Tistallation a r vete e 2 1 Instrument identifiers sss 4 15 Instrument Menu serene 2 18 Instrument Menu illustration 2 17 Instrument Status screen sees 2 33 Instrument Status Screen illustration 2 33 Interface Menu sss 2 28 Interface Menu illustration 2 21 2 28 98417600 Rev E K Keyboard functions
156. ust the NO flow rate to generate an NO concentration of approximately 90 of the full scale NO range EC9841 NOx ANALYZER OPERATION MANUAL 5 Allow the analyzer to sample this NO concentration until the analyzer readings have stabilized Record the NO and NO readings as NO opig and NO logic 6 Turn on the O generator in the GPT system Adjust the generator to produce sufficient O to generate an NO concentration equivalent to approximately 80 of the full scale NO range The NO concentration must not exceed 90 of the original NO concentration generated in step 2 7 When the analyzer readings have stabilized record the NO and NO readings as and NO gy4 Calculate the converter efficiency from the following equation Ta D NO x100 NO lena NO log i D NO NO oric NO FINAL x 100 Equation 3 0 3 where NO orig NO concentration before the addition of in ppm NO nat NO concentration after the addition of in ppm NO concentration before the addition of in ppm NO concentration after the addition of in ppm 8 Ifthe converter efficiency is less than 96 replace the converter 9 From the primary screen press the up or down arrow to prompt START MANUAL CALIBRATION Confirm the display reads and press Enter 10 Move the backlit cursor to the CONVERTER EFFICIENCY field Program this value for the c
157. veral NO concentrations by diluting the NO working standard Use the nominal NO cylinder concentration to calculate the diluted concentration Plot the analyzer NO response in ppm versus the nominal diluted NO concentration and determine the slope Snom Calculate the NO concentration of the working standard NO from NO NO yoy XSyoy Equation 3 0 16 If the nominal NO concentration of the working standard is unknown generate several NO concentrations to give on scale NO responses Measure and record Fyo and F for each NO concentration generated Plot the analyzer NO response versus and determine the slope that gives NO directly The analyzer NO responses to the generated NO concentrations reflect any NO impurity in the NO working standard In the procedure above it is also possible to assay the NO content of the working standard without first calibrating the NO and NO responses of the analyzer This is done by comparing relative NO responses of the working NO standard to the NIST traceable NO standard The NO impurity can be determined from the analyzer NO response provided the molycon efficiency is known 3 10 1 2 NO Working Standard Traced to NIST NO Standard Use the NO working standard and the GPT calibration procedure to calibrate the NO NO and NO responses of the analyzer Refer to the calibration procedure for details For this pseudo calibration use the nominal NO cylind

EC9841 Operation Manual

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