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Oxides of Nitrogen Analyser (High Level)

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1. F JINOlsm x Fyo X Vre Fy 0 0 2 75 Equation 3 0 11 6 Compute t as Vac Es Eko tr Equation 3 0 12 7 Verify that tx is less than two minutes If not select a reaction chamber with a smaller Vac 8 Compute the diluent air flow rate as Fy F F Fo Equation 3 0 13 where F is the diluent air flow rate in slpm 3 20 98417600 AS Rev C CHAPTER 3 CALIBRATION If Fo turns out to 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 mp NO x F Fy 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 NO oyr 22 Ols y Equation 3 0 14 where NO ouvr dil
2. 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 SNN number of parameters in ASCII 1 to 9 optional lt PPPPPPPPPPPP gt parameter in ASCII to 15 characters optional 98417600 AS Rev C 4 7 EC9841AS 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 lt CCCCCCCCC gt lt III gt lt T gt 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 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 lt CR gt 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 follo
3. ecotech environmen tal monitoring solutions EC9841AS Oxides of Nitrogen Analyser High Level User Manual www ecotech com EC9841AS 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 Step 4 Calibration Perform a quick single point calibration Operation Manual 2 4 Setup and Calibrate the Analog Outputs if applicable Operation Ma
4. 16 PRE POT 6 9850 high voltage adjust 17 PRE POT 7 9850 lamp adjust 18 VREG POT 1 Flow control zero 19 VREG POT 2 20 VREG POT 3 21 VREG POT 4 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 AS Rev C EC9841AS 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 Pl BIT 3 Spare Driver 1 BIT 2 BIT 1 98417600 AS Rev C CH
5. 98417600 AS Rev C 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 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 AS Rev C EC9841AS NOx ANALYZER OPERATION MANUAL ECOTECH Service and Spare Parts For world wide customer service amp spare parts contact ECOTECH Address Ecotech Pty Ltd 1492 Ferntree Gully Rd Knoxfield Australia VIC 3180 Phone 61 1300 364 946 Fax
6. A 5 change in pressure produces less than 1 change in reading 1 1 12 Temperature Range o 15 to 35 C 41 to 104 F 1 1 13 Power o 200 watts consumed at 115 VAC o 99 to 132 VAC 198 to 264 VAC 47 to 63 Hz 1 1 14 Weight o 26 4 kg 58 1b 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 with menu selectable zero offset of 0 5 or 10 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 98417600 AS Rev C 1 3 EC9841AS NOx ANALYZER OPERATION MANUAL o USB port connection on the rear panel provides data transfer and control o DBSO with discrete status user control and analog output 1 4 98417600 AS Rev C CHAPTER 1 DESCRIPTION This page is intentionally left blank 98417600 AS Rev C 1 5 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 EC9841AS 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
7. 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 16inch ID The recommended ID is 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 2 6 98417600 AS Rev C CHAPTER 2 INSTALLATION amp OPERATION through a charcoal exhaust scrubber to remove excess ozone and prevent damage to the pump The exhaust of the pump should be connected to a manifold to vent the exhaust gas away from occupied areas Warning After removal of power from the EC9841AS the exhaust should be maintained for approximate
8. 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 ACK 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 command 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 sTX 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 AS Rev C CHAPTER 4 DIGITAL COMMUNICATION 4 4 3 12 Enhanced Protocol Idiosyncrasies o The string DA lt cR gt is a valid command o The Da command will function without an I D o The data type must be sent on 9800 style commands but
9. Bit 9 HEATERFAIL Bit 8 REFFAIL Bit 7 PS FAIL Bit 6 HV FAIL Bit 5 OUT OF SERVICE Bit 4 instrument is in zero mode Bit 3 instrument is in span mode Bit 2 unused 98417600 AS Rev C CHAPTER 4 DIGITAL COMMUNICATION Bit 1 SET gt PpPM 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 lt 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 AS Rev C 4 19 EC9841AS NOx ANALYZER OPERATION MANUAL 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 STAT
10. D DAS connections ecceeceeseeesceeeeeeeeeeeeeeenseenseeaee 2 2 Data Lotani aenn aea eaee 2 31 Date and time setting esessesssseesseesersseserereeesee 2 11 Diagnostic Menu 0 0 ceeeeeeseceeeeeeseceeeeeeeeeeeens 2 26 Diagnostic Menu illustration ecceeeeees 2 26 Digital communication ccecceeseeeeeeeeeeteeeeeeees 4 1 Discrete Control a a a a E ER 4 1 Display adjustment ssseseeeeeeeeeeseseeseersesrrrrereresee 2 8 E Enhanced protocol ccescceesceceseeeeneeceeeeeeneeeeee 4 12 Event Log illustration 0 cecesseeseseereeeeeees 2 33 Event Log SCreenivescecctesseessissesveseieecvessecsensnetessessss 2 33 Exhaust connections ce ceesceesceeeceseeeteeeseeneeenee 2 6 G GPT calibration in nosga a 3 15 I Illustrations 50 Pin Connector Board with Sample tente E E E teins besetece ste sees sees 2 4 Illustrations Analog Output Menu 2 28 2 31 Illustrations Analog Output Menu Current 2 29 Illustrations Analog Output Menu Voltage 2 30 Illustrations Analyzer Keyboard cece 2 10 Illustrations Analyzer Rear Panel 0 2 2 Illustrations Cable Connections cc cccceeee 4 6 Illustrations Calibration Apparatus with NO2 Permeation Tube ccecesceeseesseeeeeeeeereeees 3 14 Illustrations Diagnostic Menu eeeeeeeeeeee 2 26 Illustrations Event Log ceeeeeeeseceeeeeceeeereeee 2 33 Illustra
11. 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 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 differences 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 98417600 AS Rev C CHAPTER 2 INSTALLATION amp OPERATION 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
12. SPDRVR1 AGND DGND PGND CGND 12V 98417600 AS Rev C 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 34 Ground reference for digital inputs or outputs 49 Chassis ground 50 12V 50 mA maximum 3 4 Unused EC9841AS NOx ANALYZER OPERATION MANUAL 4 4 4 1 1 1 Notes 1 All outputs are open collector active LOW 2 Analog output 3 is NO 3 Analog output 1 is NO 4 Analog output 2 is NOx 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 temperatu
13. 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 0 x o For Bavarian Network commands no acknowledgment is returned 98417600 AS Rev C CHAPTER 4 DIGITAL COMMUNICATION 4 4 3 3 Negative Command Acknowledgment o For 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 o The 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 lt STX gt character o The Da command will function without a serial I D o The string DA lt cR gt 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
14. 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 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 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 98417600 AS Rev C CHAPTER 3 CALIBRATION 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 C
15. 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 relationship for the NO channel 3 6 7 Final Converter Efficiency Check 1 Calculate a least squares slope for the NO calibration curve using NO oyz 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 EFF onv final EFF ony 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 96 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 ar
16. 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 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 Flush 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 wo
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18. 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 recommended 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 documen
19. 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 98417600 AS Rev C 3 33 EC9841AS NOx ANALYZER OPERATION MANUAL Setting an incorrect span gas value with SPAN COMP ENABLED causes 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 8 The number displayed after NO SPAN RATIO and NO2 SPAN RATIO is the factor by which the instrument 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 The instrument will initiate a full zero span cycle starting at the prescribed hour The v
20. Concentration before 984X background and gain 87 Secondary 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 Gasl 0 0 or 0 20mA 1 5 or 2 20mA 2 10 or 4 20mA 99 Voltage Offset Current Range Gas2 0 0 or 0 20mA 1 5 or 2 20mA 2 10 or 4 20mA 100 Voltage Offset Current Range Gas3 0 0 or 0 20mA 1 5 or 2 20mA 2 10 or 4 20mA 101 Full Scale Gas 1 98417600 AS Rev C 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
21. E EE oedenddedesseadactees 1 3 IE E EAA E E E E E T E A A S 1 3 LILIJANA oS OUI Put e e ae E AE EERE AE EEEE SEEE Se E EEEa EESTE E EES a EEE 1 3 LT TO Digital OU pute via scis asd RI aco sa ace EE Se sins A E E apenas EE eelewaee de ERA EEAS 1 3 2 0 INSTALLATION AND OPERATION cscssssssssscssssssssscsscssssscsscsssseccsesssssssscsssnecsssssssnsssssssssnsssssssssnsssssssess 2 1 2 MECHANICAL INSTALLATION rtiri oaea eee EEE e EERE EE e EERE EN EEEE YETENE E Se 2 1 ZLA Selecting a Location a ran n e a ved satan E ENa EE o due Bi EEEE oE EEN a aai e PEA DERE aa i 2 1 2 1 2 Connect onsi iioii EE A REE oud AA N EEEE i R R SETTEN ei eian eE Ra 2 1 PIEN OI KONI I LEONIN O HONET EEA T E S 2 7 2 2 1 Display Adj stM ntSi sisremare tassonas ea an a ESE aSa ESAE OEE E Eai TESES 2 6 2 2 2 War MUP pe e a re a a de a teat bile a a e a aa e a 2 9 223 OPERATION E EES E A S E E E E Ee O duce cela E E 2 9 2 34 General Operation INfOrmation ccscccscsssiisevestsesescesstesesteaceussevepeingte EEEE ENERE ENE EE EEEE EAE EEES aSa 2 10 2 3 2 Using the Menu and Making Entries oooooseseeeseeesseeeeseseresrsreeresresrssresrssesrrssesreeresresreserrrnseseesesreereee 2 10 2 3 3 Setting the Date and Time missini iseni se anagegseacesateassisia ss ssi saa enak AS a ESAS naa E EA Eaa 2 11 2 4 ANALYZER CALIBRATION ntr a e r r ea a e a erae 2 12 ib TL A AA TN 1AE EAEE EE E AEE A E E E A A E E RO ae 2 12 DAZ AULOM LICR cio e ER EEN PRE ER I eg itl i 2 12 2 4 3 MUL ii dss as
22. First determine the minimum total flow F 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 AS Rev C 3 15 EC9841AS NOx ANALYZER OPERATION MANUAL The operational characteristics of the ozone source put limitations on the maximum flow F of the calibration system The Ecotech GasCal 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
23. 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 Syjr Generate several NO concentrations by diluting the working NO standard to give on scale NO responses Measure the total flow at the manifold Fy in slpm for each NO concentration generated Plot the analyzer s NO response in ppm versus 1 F and determine the slope Srp Calculate the permeation rate R g min from Soro Kx Snist Equation 3 0 19 where K 0 532 ul NO ug NO at 25 C and 760 torr 760 torr 101 kPa 3 28 98417600 AS Rev C CHAPTER 3 CALIBRATION 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
24. 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 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 Adjust the NO flow rate to generate an NO concentration of approximately 90 of the full scale NO range 98417600 AS Rev C CHAPTER 3 CALIBRATION 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 loric 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 NO pnat and NO pnar Calculate the converter efficiency from the following equation D NO n NO Jenat NO Joric EFF x100 x 100 inl D NO NO oric a NO FINAL Equation 3 0 3 where NO orig NO concentration before the addition of
25. REFFAIL ZEROON VOL LAMPFAIL 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 AS Rev C EC9841AS NOx ANALYZER OPERATION MANUAL 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 AS Rev C
26. Sereen prone aaan AEE 2 16 Protocol Selections cccccccccecssecessceeseceteeeeseeeees 4 10 Protocol Bavarian cccceecceceseessesseeseseseeseesees 4 11 98417600 AS Rev C CHAPTER 4 DIGITAL COMMUNICATION Protocol enhanced cccscsssessssseseeeeesssesseees 4 12 Protocol original c cesccesceeseceteeeeeeseeeseeneeees 4 10 R Recorder connections ccceeceececesceceesseeeceeeaees 2 2 S Sample gas Connections s sessesseseeseeseseeesesereeerees 2 6 Serial command Control cccceecscceesseceeeseeeees 4 7 Serial CONNECTtIONS ccccccceescccessececeesseceeesseeeees 4 5 Serial control 23 sc c ecaiesiedesees Reseed deceive ees 4 5 Serial Port ccccccccsscecesssececssscececsseeeessnaeees 2 26 4 7 Serial terminal Control ccccccceescccessseceeeseeeeees 4 6 Setting the date and time eee eeeeeeeeteeeeeees 2 11 Standards calibration 0 cccccecssceessseeceeneees 3 26 Status Output Connections illustration 4 5 Strip Charts Illustrating Offset illustration 2 37 System Faults screen cece eee eeeeeeeereeeeeees 2 35 System Faults Screen illustration 2 35 System Temperatures Screen 0 0 eee eeeeeeeee 2 34 System Temperatures Screen illustration 2 34 T Terminal control serial 0 cccccceessceesseeceenseees 4 6 TESt Men s e r I EN N E 2 23 Test Menu illustration cccccecesceeeseeeee
27. Sgrp Calculate the permeation rate R ug min from R Serp K Equation 3 0 20 where K 0 532 ul 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 procedure outlined in section 3 10 1 2 Note For further information on calibration by GPT and NO permeation devices refer to Part50 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 98417600 AS Rev C 3 29 EC9841AS NOx ANALYZER OPERATION MANUAL 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 t
28. a working standard so the standard traceable to an NIST standard is not used up This section describes methods of determining 98417600 AS Rev C 3 25 EC9841AS NOx ANALYZER OPERATION MANUAL 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 Nominal NIST SRM Type a Liters STP Concentration 16836 Nitric Oxide i Nitric Oxidein N e Nitric Oxidein N _ 50 ppm M Nitric Oxide in No 100 ppm 1685b Nitric Oxide in N3 250 ppm 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 th
29. appears in the lower right comer In the lower left hand corner there is the Ecotech Globe rotating indicating that the program is running After the warm up 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 t failure that failure is displayed on t FAULT etc The status line will clear he status line is blank If there is a single he status line i e ZERO FLOW HEATER 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 syst EM FAULTS screen Instrument gain displayed above the operational mode indicates the relationship between the calibration concentration and a measured gas concentration within the analyzer It is an essential parameter for the calibration of the analyzer and is 2 16 98417600 AS Rev C CHAPTER 2 INSTALLATION amp OPERATION an important requirement for system audits This instrument contains two instrument gains one for the NO channel and another for the NO2 c
30. 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 Come is ENABLED 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 Come is ENABLED 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 5 5 2 Manual Calibration 2 22 98417600 AS Rev C CHAPTER 2 INSTALLATION amp OPERATION The following screen appears when CALIBRATION MANUAL is selected CALIBRATION MENU CALIBRATION CAL MODE NOx CAL PRESSURE NO CAL PRESSURE MANUAL MEASURE 750 0 TORR 750 0 TORR Figure 2 12 Manual Calibration Menu CALIBRATION Designates TIM CAL MODE ED Or MANUAL calibration control 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 CYCLI NOx CAL PRESSURE This is the measured ambient pressure during the last NO calibration NO CAL PRESSURE This is the measured ambient pressure dur
31. 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 nnnntee 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 nnnntee NO concentration ss DO D1 D2 D3 D4 D5 D6 D7 ff DO D1 D2 D3 D4 D5 98417600 AS Rev C 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 4 15 EC9841AS NOx ANALYZER OPERATION MANUAL D unused D7 unused kkk NOchannel ID mmm NO instrument ID pppp ee 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 l
32. 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 AS Rev C 4 11 EC9841AS NOx ANALYZER OPERATION MANUAL 4 4 3 8 Bavarian Protocol Idiosyncrasies m o g The string DA lt CR gt is 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 EC9841AS and a computer Every command with a valid I D will respond with either lt ACK gt or lt NAK gt
33. 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 This procedure is appropriate for connecting the EC9841AS analyzer to a strip cart recorder Data logger DAS or to a Digital voltmeter 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 or 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
34. 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 lt Select gt 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 lt Enter gt key to confirm the entry To set digits in a digit field first press the lt Select gt 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 lt Select gt When all digits of an entry are correct press the lt Enter gt key to confirm the entry Caution The lt Select gt key does not confirm an entry You must press the lt Enter gt 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 lt Exit gt key and the values will return to the previous entries 2 3 3 Setting
35. firmware version 1 34 and above Ecotech Manual ID Manual PN Current Revision Date Released Description Rev Date A June 2005 B November 2005 C May 2007 MAN 0014 98417600 AS May 2007 EC9841AS Nitrogen Oxides Operation Manual Revision History Summary New Release for new Microprocessor Board Based on original manual Second Instrument gain information added Updated specifications language and links within pdf manual created Affected Pages All Various All 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 Space Center Photo Reference ISS006 E 19897 98417600 AS Rev C EC9841AS NOx ANALYZER OPERATION MANUAL 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 A
36. 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 EC9841AS 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 connection type DcomM and press the Enter key The complete alphanumeric set recognized by the EC9841AS should be displayed on the computer followed by END OF MULTI DROP PORT TEST 4 4 4 1 Multidrop Communications 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 th
37. 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 characteristics 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 AS Rev C CHAPTER 3 CALIBRATION o NO Flow Controller A device
38. mode the 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 displayed o x Comm Mode AlE Date Time Gast Unt Period Function Status_ Failure Status Type lt 03 12 01 09 59 0 001013 ppm 1 min M C200 Inst 03 12 01 10 00 0 001012 ppm 1 min M C200 Inst 03 12 01 10 01 0 001012 ppm 1 min M c200 Inst 03 12 01 10 02 0 001012 ppm 1 min M c200 Inst 03 12 01 10 03 0 001012 ppm 3 min M c200 Avg 03 12 01 10 03 0 001012 ppm 1 min M C200 Inst 03 12 01 10 04 0 001012 ppm 1 min M C200 Inst 03 12 01 10 05 0 001012 ppm 1 min M c200 Inst 03 12 01 10 06 0 001012 ppm 3 min M c200 Ava 03 12 01 10 06 0 001012 ppm 1 min M c200 Inst 03 12 01 10 07 0 001012 ppm 1 min M C200 Inst 03 12 01 10 08 0 001012 ppm 1 min M C200 Inst 03 12 01 10 09 0 001012 ppm 3 min M C200 Avg 03 12 01 10 09 0 001012 ppm 1 min M c200 Inst 03 12 01 10 10 0 001012 ppm 1 min M c200 Inst 03 12 01 10 11 0 001012 ppm 1 min M C200 Inst 03 12 01 10 12 0 001012 ppm 3 min M C200 Avg gt 21901 19 19 nAn nara A rain ha conn laat 98417600 AS Rev C Download Complete COM1 Closed Figure 4 5 Acquired Data completion screenshot 4 27 EC9841AS NOx ANALYZER OPERATION
39. 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 cylinder value and assume there is no NO impurity in the cylinder From the GPT data plot the analyzer s NO responses versus the NO concentration generated by GPT Determine the slope of the NO output curve Snom 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 Syst Calculate the NO concentration of the working standard NO x7p from the following formula 98417600 AS Rev C 3 27 EC9841AS NOx ANALYZER OPERATION MANUAL S NO stp NO xom xu Syist Equation 3 0 17 Calculate the NO impurity from the following equation x intercept F 7 Shom F NO S yist NO Jive Equation 3 0 18 3 10 2 NO Working Standards Traced to NIST Standards
40. 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 RANGE Set 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 0 5 or 10 ole 98417600 AS Rev C 2 31 EC9841AS NOx ANALYZER OPERATION MANUAL 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 be
41. 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 Auxiliary 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 AS Rev C 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 98417600 AS Rev C Note This procedure is a quick guide to single point span calibration of the EC9841AS analyzer For complete gas preparation and multipoint calibration instructions refer to Chapter 3 Calibration With a stable supply of calibration gas connected to the Auxiliary port of the analyzer verify that in the CALIBRATION MENU CALIBRATION is set to MANUAL and CAL MODE to SPAN Allow the analyzer to sample the gas until a stable reading is obtained typically 15 minutes From the primary screen s
42. 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 lt Enter gt If current output type was selected choose the desired output range and press lt Enter gt 98417600 AS Rev C 2 39 EC9841AS NOx ANALYZER OPERATION MANUAL 5 Select ZERO ADJUST and adjust the analog output to the selected offset position for zero concentration 1 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 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
43. 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 DISABLED 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 AS Rev C CHAPTER 3 CALIBRATION Unlike some of the other EC9800 series instruments the EC9841AS 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
44. the converter efficiency is known to be other than 100 program this value and press lt Enter gt otherwise press lt Enter gt 2 13 EC9841AS NOx ANALYZER OPERATION MANUAL 2 14 10 The concentration on the primary screen should now read the same as the concentration of the calibration gas Note The auto zero function of the EC9841AS 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 te 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 Zl ERO Confirm that the display reads z ERO and press lt Enter gt 4 A backlit cursor will be displayed on the NO concentration display 4 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 NO zero value is displayed e g 0 000 PPM When the desired concentration is displayed press lt Enter gt This completes the span calibration of the EC9841AS analyzer 98417600 AS Rev C 2 5 Menus and Screens MAIN MENU INST CALI TEST NTE TREN N
45. 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 The 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 At the prompt CYCLE TIME enter the number of minutes required for the span and zero steps to run 6 At the prompt No 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
46. 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 315 5 C approximately 60 minutes after applying power Note The EC9841AS 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 AS Rev C 2 9 EC9841AS NOx ANALYZER OPERATION MANUAL 2 10 2 3 1 General Operation Information All operator responses needed to operate the EC9841AS are performed by pressing the 6 keys available on the front panel to the right of the display screen The key f
47. 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 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 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 98417600 AS Rev C 2 21 EC9841AS NOx ANALYZER OPERATION MANUAL 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
48. 5 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 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 lt 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 20 98417600 AS Rev C CHAPTER 4 DIGITAL COMMUNICATION Device response TEMP1 TEMP2 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 C
49. 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 AS Rev C 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 AS Rev C EC9841AS NOx ANALYZER OPERATION MANUAL This page is intentionally left blank 98417600 AS Rev C CHAPTER 1 DESCRIPTION 1 0 Description The EC9841AS nitrogen oxides analyzer uses gas phase chemilluminescence detection to perform continuous analysis of nitric oxide NO total oxides of nitrogen NO and nitrogen dioxide NO The 9841AS 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 9841AS virtually elimina
50. 8417600 AS Rev C CHAPTER 3 CALIBRATION Note The auto zero function of the EC9841AS eliminates the need for a traditional zero calibration 2 Record the final stable zero air responses as Zyo ZNox and Zyoz 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 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 Fyo X NO stp FNO F F NO OUT Equation 3 0 1 NOx cc Fyo X INO 975 TINO limp ae Fea FR Equation 3 0 2 where NO oyr diluted NO concentration at the output manifold in ppm NO Jour diluted NO concentration at the output manifold in ppm NO rp concentration of the undiluted NO standard in ppm NO mp 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 98417600 AS Rev C 3 9 EC9841AS NOx ANALYZER OPERATION MANUAL Fy O 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 sa
51. APTER 4 DIGITAL COMMUNICATION BIT 0 Reference Fail 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 AS Rev C EC9841AS 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 O3 Lamp Temperature 83 Instrument Status 84 Reference Voltage 85 Calibration State 0 MEASURE 1 CYCLE 2 ZERO 3 SPAN 86 Primary Raw
52. 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 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 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 98417600 AS Rev C 2 37 EC9841AS NOx ANALYZER OPERATION MANUAL 2 38 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 Rang
53. Appendix F o Alternative A Gas phase titration GPT of an NO standard with O to generate known concentrations of NO o 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 calibrating NO analyzers Analyzers that require calibration of NO or NOx channels must use an NO standard and a 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 U S EPA Technical Assistance Document EPA 600 4 75 003 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 98417600 AS Rev C 3 3 EC9841AS NOx ANALYZER OPERATION MANUAL 3 4 Z
54. Command 4 6 3 Settings Open the Settings dialog box by either clicking the a 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 Enter the path and filename of the text file that the EC9800 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 Baud rate Choose the baud rate that has been set on the analyzer 98417600 AS Rev C CHAPTER 4 DIGITAL COMMUNICATION 4 6 3 2 2 Modem Connection Connect using Ch
55. D ON ENU 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 EC9841AS Service Manual includes the names and pneumatic positions of the valves described here 98417600 AS Rev C CHAPTER 2 INSTALLATION amp OPERATION 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 MENU 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 the watchdog timer The system resets when this test is executed 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 exi
56. G GPT oo cece ccsceseseessesecesesscsesssesecsssssesessssssesssesesesaseesesssssessssesesaeases 3 15 SPE PHINCI 1 PEE EEEE ETE E oe Saw aa Te E Sa aige oa ah a Saad E E uae te aban ee anes 3 15 3 8 2 Preliminary GPT Design Considerations c sccscsssesesscesecscesecuseeeceseeseesecseesecuseesesaseseesecaeesecneeeeeaeeeeeas 3 15 3 8 3 Major Equipment ReqQuited c css csscesscsiscesscessseatsvescesanstsanivagessetaceaasesspedsetiastsandvaeedceaacess seaddoetoetbastsseiaeeeaes 3 16 3 8 4 SYSTEM Setups sissies naase e i e E E SEE aai EA EE EEEE Sa ET EEs A EERE ariei 3 16 SREDE ANAA AEE EEEE AEE E AEE EE AEE AA EE EE 3 17 3 8 6 Dynamic Parameter SpecificationS seeeeeseeeeseeeseseeesereseseseerersrerrseereesereeseseeeseserseeserreseeseeesesereseseeees 3 19 3 8 7 Determining NO2 Impurity in the NO Cylinder s cracnenicrereneninereninionenenennennnnea 3 21 98417600 AS Rev C FRONT MATTER 3 8 8 Helpful Formulas for Calibration by GPT w ccccccccesccesscesccesecesecnseccessecsecaeeeseeeseesaeeseeeseeseceseensesaeenae 3 2 3 9 GUIDELINES FOR CALIBRATION USING NO PERMEATION DEVICES ssssesesesecsesessesesesececsesessesesececseneeesens 3 22 DEOL Pinpon aa E NE PE OA TSS FS oa A A E E dasa AoA 3 22 3 9 2 Components of a Permeation Device Calibration System ccsccsccssesscssscsesecnseesceseesceseceesecneesecesneeaes 3 22 3 9 3 Constant Temperature CHAMDET ccccccccesccesecesecesecnsecnseeseeeseesssessessecescensecaecuaecaaesecuaecnaec
57. 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 TERMINATOR Device response lt ACK gt Command GETDATA Function Used to collect logged data from an analyzer Format 98417600 AS Rev C 4 23 EC9841AS NOx ANALYZER OPERATION MANUAL This command takes two different formats depending on the transmission state TO begin with the following format must be used GETDATA lt 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 lt DEVICE I D gt 2 1 lt REQUEST gt TERMINATOR Where REQUEST O to retra
58. IPTION sccsscisscessassenssesiacsesessuaessesisonnsecsnassdecseonesentessntesensessnnesieedesnnsessaseseesiseeasessveesasssenteseavessatesberdesonseess 1 1 Tel SPECIFICATIONS acces Haven Arde Howth Aris hand nda aes Snties Wa en Rain a A Na eA ae earned 1 2 DDT RANG Erei as satan el eta teat wasted ba ecb a Hae Sok ce Ta bea oa eaaa Has Yaa Td a a ached ducks outed ease E ee eR 1 2 EDD NOSE RMS oiiire n ea a E a sees OENE EREE N A EE EE DENEA 1 2 1 1 3 Lower Detectable Lintit ccccccccccccccccsessscccecesssuscecesecsesessececesecsesesseseeececeeseaasecececeeseesecececesesesssaeseeeceenensags 1 2 Ded A Zero DIE oe Let teas pn dante as cols hes used ut aec soe seas cede rds op abet dete pau scenbed eeabe tos aeaa a EOE Eas o ae ade aS 1 2 LiDiD SPAN DIU i AARE E AEE saeeu caus teas gees EA EE 1 2 EDO LG TUN AEI Soa was hitaa ei aes Seaton oa va ae Sansa E E E 1 3 1 1 7 Rise Fall Time 95 Of Final Value c sscceseccesseceseceessecesnceensecesncecsseceeneecsaeceeneeesaecseneeesaeceaeeceaaecseeeeesaeeees 1 3 DD SEAN OAV Errotea a tatane a EEA vase aA E E AE eaaa a i e a aa arai aE REENE ESS 1 3 DTD PVCCISION EREA E EAE E A A E A AEA E A SAE 1 3 TLIO Sample Flow R tei nennen n CG Sos es E ER Bas E E A E Ree as ag eR 1 3 TIAI Sample Pressur Dependence isie reier en te televise oe oes ashe Abdi eds ues abe eae 1 3 LLL 2 Temperature RANG Es cies hesiessileieay vaceeasbesa a e E aE a N a AEE aE RAAE OEA 1 3 TD o SP OWENS cha EE EE E E E E A E E E E E A
59. M 4 1G M 5 nG M 117_ Background Measure Time In seconds 118 Sample 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 Fill 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 AS Rev C EC9841AS 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 AS Rev C CHAPTER 4 DIGITAL COMMUNICATION 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
60. M parts per million mc m 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 or nG M then the conversion factors listed below will apply depending on the CONVERSION TEMP selected To convert 1 PPB Gas to ug m 0 C 20 C ZC apg 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 the analyzer must be re calibrated in order to meet U S EPA requirements 98417600 AS Rev C 2 19 EC9841AS NOx ANALYZER OPERATION MANUAL 2 20 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 pG 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 40r5 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
61. MANUAL 4 28 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 As for on screen selected in the Output tab of the Settings dialog box when the data in that row were recorded Data Up to three channels of analyzer As for on screen data with column headings as set by the analyzer 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 the Mode menu choose the Remote Terminal option 3 Onthe Comm menu select Start 4 The screen should replicate the analyzer s display similar to Figure 4 6 The user now has acce
62. 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 NO 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 oUTPUT 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 CURRENT OUTPUT is selected RANGE Sets the upper range limit of concentration in digits that will be measured by the instrument 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 2 30 98417600 AS Rev C CHAPTER 2 INSTALLATION amp OPERATION 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
63. National Bureau of Standard Reference Materials EPA 600 7 81 010 U S Environmental Protection Agency Environmental Monitoring Systems Laboratory MD 77 Research Triangle Park NC 27711 January 1981 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 EC9841AS NOx ANALYZER OPERATION MANUAL This page is intentionally left blank 3 36 98417600 AS Rev C CHAPTER 4 DIGITAL COMMUNICATION 4 0 Digital Communication The EC9841AS 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 access 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 DosPAN These inputs will place the analyzer in either Zero mode or Span mode respectively the analyzer will remain in the selected mode while the inpu
64. O in ppm NO nat NO concentration after the addition of O in ppm NO orig NO concentration before the addition of O in ppm NO emar NO concentration after the addition of O 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 SPAN and press lt Enter gt 10 Move the backlit cursor to the CONVERTER EFFICIENCY field Program this value for the calculated converter efficiency in and press lt Enter gt 11 Press lt Pg Up gt or lt Exit gt 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 98417600 AS Rev C 3 11 EC9841AS NOx ANALYZER OPERATION MANUAL 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 NOx calibration curves If desired compute calibration relationships for both the NO and NO channels Note For
65. 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 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 cell This voltage represents actual gas measurement 98417600 AS Rev C 2 25 EC9841AS NOx ANALYZER OPERATION MANUAL 2 26 HIGH VOLTAGE Microprocessor generated information Use the value as reference when adjusting the high voltage adjust pot 2 5 9 Valve Test Menu INT INT INT INT INT EXT EXT EXT g VALVE SEQUENCING Figure 2 16 Valve Test Menu The VALVE TEST M INT VALVE 1 NOx sample INT VALVE 2 NO sample INT VALVE 3 NOx bypass INT VALVE 4 NO bypass INT VALVE 5 Background EXT MEASURE VALVE TEST MENU VALVE 1 VALVE 2 VALVE 3 VALVE 4 VALVE 5 MEASURE ZERO GAS SPAN GAS Externally supplied sample stream EXT ZERO GAS Externally supplied zero air OPEN CLOSED CLOSED OPEN OPEN OPEN CLOSED CLOSE
66. S Rev C 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 pump 98417000 T Nitrogen Oxides Analyzer Trace 98417000 1 Nitrogen Oxides Analyzer B series 98415200 100 Nitrogen Oxides Analyzer High Level 98417000 2 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 amendment 2 o Immunity Requirements EN61326 1 IEC 61000 4 11 Voltage Interupts 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 direct
67. ST SYST SYST CHAPTER 2 INSTALLATION amp OPERATION This section illustrates the various menus and screens for the EC9841AS analyzer A short description of each menu and screen is provided The entire menu structure is shown below in Figure 2 6 BRATION MENU RUMENT F MENU RFACE MENU D SELECT MENU EVENT LOG RUMENT STATUS TEMPERATURES FAULTS L EM EM 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 FACTOR 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 CONVERTER TEMP COOLER STATUS HIGH VOLTAGE ON S Salt 1 UNIT SELECTION CONVERSION TEMP DECIMAL PLACES AVERAGE PERIOD FILTER TYPE NO2 FILTER NOISE NO OFFSET NO2 OFFSET CALIBRATION MANUAL l CAL MODE NOx CAL PRESSURE NO CAL PRESSURE PREPROCESSOR POTS VALVE TEST MENU MULTIDROP PORT TE
68. ST WATCHDOG TEST DISPLAY TEST ANALOG OUTPUT TEST NO OUTPUT MENU NOx OUTPUT MENU NO2 OUTPUT MENU AVERAGE DATA INST DATA TOTAL CAPACITY ERASE LOGGED DATA NO CONCENTRATION NOx CONCENTRATION NO2 CONCENTRATION NO AVERAGE NOx AVERAGE NO2 AVERAGE ZERO OFFSET SPAN COMPENSATION SAMPLE FLOW SAMPLE PRESSURE CONVERTER TEMP CELL TEMP CONV TEMP CHASSIS TEMP MANIFOLD TEMP COOLER TEMP Figure 2 6 Menu Structure 98417600 AS Rev C INPUT TEST HIGH NO CONC HIGH INT INT INT INT INT EXT EXT EXT MEASURE VOLTAGE ADJUST VOLTAGE VOLTAGE VALVE 1 VALVE 2 VALVE 3 VALVE 4 VALVE 5 MEASURE ZERO GAS SPAN GAS VALVE SEQUENCING RANGE OUTPUT TYPE OFFSET FULL ZERO OVER OVER RANGE SCALE ADJUST RANGE RANGING OUTPUT TYPE OFFSET FULL ZERO OVER OVER RANGE SCALE ADJUST RANGE RANGING OUTPUT TYPE OFFSET FULL SCALE ZERO ADJUST OVER OVER RANGE RANGING 2 15 EC9841AS NOx ANALYZER OPERATION MANUAL 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 NOx NO SAMPLE MEASURE STATUS LINE cS INSTRUMENT GAIN 14 23 15 AUG 05 4 655 4 643 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 not ation MAIN MI ENU
69. TIDROP BAUD 2400 DATA LENGTH 8 BITS STOP BITS 1 BIT PARITY NONE COMM PROTOCOL ORIGINAL NETWORK ADAPTOR MENU 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 available 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 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 98417600 AS Rev C 2 29 EC9841AS NOx ANALYZER OPERATION MANUAL 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
70. URES CELL TEMP 50 0 CONV TEMP 315 0 CHASSIS TEMP gt 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 98417600 AS Rev C 2 35 EC9841AS NOx ANALYZER OPERATION MANUAL 2 5 21 2 36 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 EC9841AS Service Manual 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 EC9841AS Service Manual 98417600 AS Rev C CHAPTER 2 INSTALLATION amp OPERATION 2 6
71. a oss RRS n A RSS E E A suse da bea eas SEs wad seg ead EAEE ENE ETEEN AEAEE A ERN 2 12 2 4 4 Analyzer Calibration INStructions ccccccesccsccesscesscesecusecuseeseeeseeseeeseeeeccusecssecnaecuaecaaecsaeeaaeeseeeseeeeseneeenees 2 13 2S MENUS AND SGREENS 3 sicviose suas becasicbicd Sect bsschcoihiechasheastecttidtaatubstheahid N 2 15 2 91 Primary Vere ehen e e e ae gees A otiade sev e Sean the teen guns dustquasSecpese leeds epescaes E Oai 2 16 22M GIN MON Sir cht ies he eaves EER RE PEE ORB IO RB 2 17 233 Instrument Men snr cds clevsesaedeastesu sen vvascagesdsoteeteicedesetvsecs ETEA EE ENA EER N ADAE VEEE EN NEEE E 2 17 2 5 4 Measurement Menu ccccccccccccccccsssceccccceccessnnscecececseneneseceseceesescaececeseseseaeeececeeseaeaeeeeeceesesseseeaeeeeeceesenaee 2 19 D355 CA rO M CN a a a a ses aa aa 2 21 256 Test MOIS e a e a a ae Ee CORI OR aes E e E Ban eee 2 23 25 7 OQ utp t Test Menusi ras eane eaeko Walia ERE E aE E lene Ea ek ees ARLE TEAR RE eet 2 25 98417600 AS Rev C EC9841AS NOx ANALYZER OPERATION MANUAL 2 5 8 Preprocessor Pots MA CNU 3s seve nerean eiae dk sek E E E E EEAS o wanes EE iia EE e aaa 2 25 2 3 9 VALVE Test MON srta oies eann ee E eE nE EE ade r oai eie EESE e ARAE N 2 26 2 D310 DiG SN Stic Menus iiyn eenaa E E EE E EAE e ENa 2 27 2 311 GCalCulation ACtOTS sicscescsecesscssissssctviesisesiasnaesbassvsanetisnivdeesdntaseasaasisesiediastioelvdesdceiacessdeasdeeisetaassaseiuarsacs 2 28 2D AZ ANCL ACE M CNUs svcau
72. 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 40 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 individual 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 The 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 AS Rev C 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
73. alve 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 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 98417600 AS Rev C CHAPTER 3 CALIBRATION 3 13 Calibration References 1 pa 98417600 AS Rev C Quality Assurance Handbook for Air Pollution Measurement Systems Volume 11 Ambient Air Specific Methods EPA 600 4 77 027a U S Environmental Protection Agency Environmental Monitoring Systems Laboratory MD 77 Research Triangle Park NC 27711 1977 A Procedure for Establishing Traceability of Gas Mixtures to Certain
74. 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 1 10 98417600 AS Rev C At INSTRUMENT MENU there is a field labeled PASSworD This should display the status UNLOCKED Select the field labeled PASSworRD 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 lt Enter gt key The password will disappear and the LOCKED message will take its place The analyzer is now locked Scroll through the instrument menus From this point forward it is impossible to select any alterable fields Return to the INSTRUMENT MENU and select the PASSWORD field The LOCKED message will disappear and 0000 appears in its place Using the lt Select gt and arrow keys scroll the numbers of the password entered previously When the password is displayed press the lt Enter gt key The password will disappear and be replaced by the message UNLOCKED The analyzer is unlocked and the menu configuration can be altered 2 41 EC9841AS NOx ANALYZER OPERATION MANUAL This page is intentionally left blank 2 42 98417600 AS Rev C CHAPTER 3 CALIBRATION 3 0 Calibration 3 1 Overview The ca
75. 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 o Air Flowmeters Calibrated flowmeters capable of measuring and monitoring air flow rates with an accuracy of 2 of the measured flow rate o 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 recommended o Pressure Regulator for Standard NO Cylinder This regulator must have a nonreactive diaphragm and internal parts and a suitable delivery pressure o 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 O3 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 o 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 o Reaction Chamber A chamber constructed of glass Teflon or other nonreactive material
76. cess 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 PINOY Die eS ee Oo When you call in our Customer Service Representative 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 Zf 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
77. cessius iosasten aes Seevvaes tees fede E cess dans e ea ins bashes gabe steucnus o KE AS EE t 2 29 2313 Analog Output MON sa reee E sea gas R EE se suuaga esas sags sk cu bidu te Roast e AE DETERS 2 30 25 14 NO NO ASN Os O tp t Men s eniinn ieoi cope lose Ue EA cecesaiiedunesa dace duce ce AE AR E AEE 2 30 2 15 Data Log ging Menu iniiaiee a aE tavaens eae DH A E T EEE AES elon 2 32 2 39 16 Network Adaptor Menis osci kanrk tananana eaaa e aaao ia aie Enara Ek aa oinas 2 33 2I A Trend Select MNU soren Riek E ok ca ahs Mead US EE E Bee REE A E 2 33 ZIT Event Loe Sereen uraan e E E Ea E Bas E E R E eed Sais PR 2 34 2 5 19 Instrument Status Ser et cisne ade Yaad e E a e e aa a Eea a ca cadence E A E R E 2 34 2 93 20 System Temperatures Screen iios dinian en a E a E E A O E ai 2 35 2 5 21 Syst m Faults Screen ji ecsscecanessscieseciacessecasdpeteeshcotsseadenedesvacsassgsugeasuciest ssuisanedecssdeaavesdeseiaetvectiserdogeiee 2 36 ZOANALOG OUTPUT sic scecssesstuseslastechoassensanteats aves O sonst exesnduatsevose ynesbvevapasonseebeaspobsrasveses 2 37 20 1 OffSCUGNE Live LOO nmi o teas tede ou steasitons ties e dosphatoedep gst ae ei d aaae S i atts 2 37 26 2 Over Range Adj stmenf cs enn neee ee cbs e EE bag OEE cea ne E A AE E R aE a vere 2 38 2 6 3 Analog Output Calibration Procedure cccccsssccssesssesecsscssesecusceeceseescesecaeesecaeeseesseeseaecaeesesseeeeaseneeaees 2 39 2 6 4 Calibration Requirements cccssccssecssesscssessceseeseesecsees
78. d it should be less than 50 VDC and the current sunk by each output should be lt 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 The EC9841AS 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 Equipment DCE per the EIA standard RS232 98417600 AS Rev C 4 5 EC9841AS NOx ANALYZER OPERATION MANUAL 4 2 2 Cable Connections Figure 4 2 Serial Interface Connection Diagrams 4 3 Serial Terminal Control If the EC9841AS 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 ke
79. descriptions are outlines below the table Unit 1 Digit ge Digit 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 E 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
80. e 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 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 AS Rev C 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
81. e NO cylinder NO yp 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 3 26 98417600 AS Rev C CHAPTER 3 CALIBRATION efficiency of the molycon Refer to the calibration procedure described in section 3 6 for details Then generate several NO concentrations by diluting the NO working standard Use the nominal NO cylinder concentration NO oy 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 stp NO nom Syom 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 Fyo Fr and determine the slope that gives NO 7p 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
82. e 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 AS Rev C 2 5 EC9841AS 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 EC9841AS should be maintained at ambient pressure with any excess flow vented to the atmosphere The EC9841AS requires at least 0 5 slpm 0 37 slpm sample plus 50 overflow
83. e 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 98417600 AS Rev C 3 13 EC9841AS NOx ANALYZER OPERATION MANUAL 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 GPT 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 _ NO lour F Equation 3 0 6 where NO our diluted NO concentration at the output manifold in ppm R NO permeation rate ug min K 0 532 ul NO ug NO at 25 C and 760 torr 101 kPa 3 14 98417600 AS Rev C CHAPTER 3 CALIBRATION 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 cal
84. e 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 In the multidrop strategy each unit is given an 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 AS Rev C 4 13 EC9841AS NOx ANALYZER OPERATION MANUAL 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 NAK 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 ca
85. ecially 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 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 AS Rev C CHAPTER 3 CALIBRATION 3 8 6 Dynamic Parameter Specifications 3 8 6 1 Flow Rates The O generator air flow rate Fo and the NO flow rate Fyo positioned as shown in Figure 3 1 must be adjus
86. ecscesccnseeecesscacesecaeesecuecseeseesseseeaecaeeeesnaesesnaseneeaees 2 40 2 PASSWORD PROTECTION 343 ssssssesessesiitagencsesvitesveseouscheaneseshienupsheancceresSeo toot saneesceute cpsbsbateneebsensy AEE EERE AETS 2 40 2 Fk RUles Of OPCr aus Onesies coe 2 i Seite wastes Sh og GE as as Aa Bac tage en Oa OR a Ces RG Das bec pens Seve GEL as dios Baas EE 2 40 272 SAMPLE SCSSION isa ce BAS Sein va whateva eE an iaa EEE stews be EEE ES EEE E ethos eee ese E ERE demas seed 2 41 3 0 CALIBRATION reei i oR o N REEE GREENE E AOE 3 1 3 FOVERVIEW oireet eor ire N E R N E e E aeae e NE Eae e EREE OSEA ESENES NS EN Enna a 3 1 3 1 1 Anal zer Calibration INStructions iens penenie ea Ear EAE EE EEE SEE E EEES 3 2 3 2 MULTIPOINT CALIBRATION AND ZERO SPAN CHECK ccccscccsesecssesscsssescsseescssecesesecsesssesesesessesesesecseeseeneseeeseees 3 3 3 2 1 Interface Connections isiatt eia na aa e EEA aE EEE ENE ERR iaa nikaiai 3 4 3 2 2 Zero Atr Generation anosa aa a aa sa veg a a gi ia aa e E a A E 3 4 3 3 CALIBRATION AND ZERO SPAN CHECK SCHEDULE sessesesssseseseetrtsssseseresetetsessestsenteneseeseseseeresesseseresetnenenese 3 4 3 4 CALIBRATION STANDARDS 005 4 sus ceeds ccs eb oe nee ds culeesdesehile EVE EEEE SE ASEET SE sebigs NEEE CO sede ge EEA Eea aE EVE eSEE Set 3 5 34 1 Standard Source of NO systainer iae n a a A A E O AE EA a tat NE legen 3 5 3 4 2 Standard Source Of NO Soni uaira AEn EAE A AA E G EAA 3 5 3 4 3 Preparing the NO Regulator and Deli
87. eeseeesssecsusssceesssesssesassecsuessssessseneeeese 4 26 46 LData Acquire Mode nese neee E aie nates bese nan an Reged EA Pao wate ngee eevee eee 4 26 4 6 2 Remote Termin l Moder visivcs cuceeands veaoden E EAEE EEE EE EE TE E EE 4 28 FOB SOUL A E A E E E E 4 30 464 Keyboard ShO T ODS aa aeaa e cokes fa ate aa a aE a a A a E a A a T EEs e A aaah Ena SS 4 31 TINDEEX E E A T E E A E E II APPENDIX A ra ee ctawsonssnanseenosavosssuasnanodssavenssssaneosonndesnssaesseucaabaveesoessnasen ebeesooseanve cteetumsomaasaranvecsectes II DESCRIPTION sce si tous A r eE e aE EES EE E sunedecoueangs NEEE eedpedodgs O RE E vanes tedvedicestoncssPorteubenecbarests cpertene I APPENDIX Boi seiisiccvcncsscasaccescsvicssocasescossovavessnaseosasvaveesnsesnssossvov Ursos eos SENE docs cusvassvenenns ceases epstewonnasen cosveneessensecanescosees Vil 98417600 AS Rev C EC9841AS NOx ANALYZER OPERATION MANUAL This page is intentionally left blank 98417600 AS Rev C Manual History FRONT MATTER This manual is a reconstruction of a previous manual used for the operation and service of the 9841AS The original manual was o ML9841AS Operation Manual PN 98415202 Rev M October 1999 The scope of this new manual covers the following analyzer o EC9841AS Nitrogen Oxides Analyzer PN 98415200 100 This instrument is manufactured by Ecotech P L in Australia and supports the new SMD Microprocessor Board Part number 98000063 4 This manual is current for
88. enee 2 23 Timed Calibration Menu cccccceceeseceeneee 2 21 Timed Calibration Menu illustration 2 21 Typical GPT Calibration System Schematic ill stration 2 0 a R 3 8 U USB rrie hae 1 4 4 23 4 30 V Valve Test Ment tiroen erines 2 25 Valve Test Menu illustration 0000000000000000e 2 25 EC9841AS 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 0 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 PRE POT 3 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 PRE POT 5 981X Lamp Adjust 9820 9830 9850 test measure 984X high voltage adjust
89. equires 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 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 AS Rev C 3 5 EC9841AS NOx ANALYZER OPERATION MANUAL 3 6 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 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
90. ero 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 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 Generation 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 usi
91. f your hardware came with an installation CD lt gt 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 3 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 4 may appear If it does click the Continue Anyway button 98417600 AS Rev C 4 25 EC9841AS NOx ANALYZER OPERATION MANUAL Hardware Installation The software you are installing for this hardware e 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 4 Dialog Box which may appear during installation 5 The installation should now proceed When complete click the Finis
92. for the quantitative reaction of O with excess NO The chamber should be of sufficient volume V such that the residence time ty meets the requirements specified in section 3 8 6 For practical reasons tp should be less than two minutes o 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 given in section 3 8 6 below is met o 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 AS Rev C 3 17 EC9841AS NOx ANALYZER OPERATION MANUAL dard NO mixture must contain no more than 1 0 ppm NO as impurity Since the manufacturer s certification of the NO content i
93. g 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 AS Rev C 3 7 EC9841AS NOx ANALYZER OPERATION MANUAL 4 Go to the INSTRUMENT MENU select the MEASUREMENT MENU and disable the NO filter 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 MENU 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 3 8 9
94. gt TERMINATOR Device response NO lt SPACE gt NO2 lt SPACE gt NOX lt SPACE gt STATUS WORD lt CR gt lt LF gt All numbers are in floating point format See the Dconc command for an explanation 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 lt DEVICE I D lt TERMINATOR 98417600 AS Rev C 4 17 EC9841AS NOx ANALYZER OPERATION MANUAL 4 18 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 lt 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 lt DEVICE I D gt TERMINATOR Device response NO lt SPACE gt NOX 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
95. h button The driver installation is now complete 4 6 EC9800 Communicator Software The EC9S800 Communicator software is supplied on CD with the EC9841AS 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 4 26 98417600 AS Rev C CHAPTER 4 DIGITAL COMMUNICATION On the Comm menu select Start In the 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 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 The analyzer must be in Command mode before the Data Acquire mode can be used If the program was last used in Remote Terminal
96. hamber 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 temperature 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 f
97. hannel 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 2 5 3 Instrument Menu INSTRUMENT MENU MEASUREMENT MENU DATE 15 AUG 03 TIME 18 57 PASSWORD UNLOCKED ERASE MEMORY NO MAIN GAS ID 041 AUX GAS ID 000 Figure 2 9 Instrument Menu 98417600 AS Rev C 2 17 EC9841AS NOx ANALYZER OPERATION MANUAL 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 h
98. he events using the Up or Down arrow keys A or Y 2 5 19 Instrument Status Screen INSTRUMENT STATUS GAS FLOW 0 05 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 550 VOLTS VERSION 1 07 0008 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 flow has gone to zero 2 34 98417600 AS Rev C CHAPTER 2 INSTALLATION amp OPERATION GAS PRESSURE Current Gas pressure is the sample pressure insise the reaction cell and should be a little below current barometric pressure AMBIENT PRESSURE Sample air 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 Additional information on the INSTRUMENT STATUS screen is included in the EC9841AS Service Manual 2 5 20 System Temperatures Screen SYSTEM TEMPERAT
99. ibration 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 calibration 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 0 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
100. ing the last NO calibration 2 5 6 Test Menu E starts an AZS cycle which is discussed in Chapter 3 TEST MENU OUTPUT TEST MENU DIAGNOSTIC MENU CALCULATION FACTORS MEASUREMENT GAIN PRES TEMP FLOW COMP DIAGNOSTIC MODE OZONATOR CONTROL LOOP 32 ON OPERATE ON ENABLED TEST NO MEASURE 0 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 98417600 AS Rev C 2 23 EC9841AS NOx ANALYZER OPERATION MANUAL the instrument s automatic control 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 normall
101. ions given by Ecotech P L in this manual 98417600 AS Rev C EC9841AS 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 a ee 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 AS Rev C 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 The EC9841AS 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 manua
102. it 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 steps 2 4 above replacing the NO standard with an appropriate converter gas i e NO2 Use the readings on the screen and the known concentrations delivered to the instrument to calculate the converter efficiency NO2 measureay NO2 expected 98417600 AS Rev C CHAPTER 3 CALIBRATION 8 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 This completes the span calibration of the EC9841AS analyzer Note The auto zero function of the EC9841AS 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
103. l 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 I Maximum altitude 2000m 98417600 AS Rev C EC9841AS NOx ANALYZER 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 pro
104. libration 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 EC9841AS 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 Calibrate 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 Imp
105. low 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 The DATA LOGGING MENU contains settings that relate to the internal data recording facilities of the EC9841AS This data can latter be retrieved using the Ecotech 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 2 32 98417600 AS Rev C TOTAL CAPACITY CHAPTER 2 INSTALLATION amp OPERATION 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 da
106. lushing 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 temperature range usually 15 to 35 C for most calibration work 98417600 AS Rev C 3 23 EC9841AS NOx ANALYZER OPERATION MANUAL 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
107. ly 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 AS Rev C 2 7 EC9841AS 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 POWER switch on the front secondary panel is switched to ON 2 2 1 Display Adjustments Adjust the display contra
108. mand PINID Function Programs the 50 pin device ID Format PINID lt 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 bit 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 AS Rev C CHAPTER 4 DIGITAL COMMUNICATION 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 lt DEVICE
109. mple 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 lt Enter gt The cursor appears in the first digit of the NO concentration field Use the lt Select gt and arrow keys to input the NO span point concentration calculated in step 2 Use the lt Select gt key to select the digit to be changed and the Up or Down keys to change the value Press lt Enter gt 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 lt Enter gt If the efficiency is not known program for a value of 100 and press lt Enter gt The two INSTRUMENT GAIN values should be recorded for future reference Press lt Exit gt 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 NO and for conditions that can consume NO or
110. n 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 apparatus 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 esp
111. n 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 PI is the only command used to set the Instrument I 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 is the unit I D yyy is the secondary unit I D o The parameter xxx is the unit I D and must be three characters o Unit I D s such as 1 should be programmed as 001 o For the 9841 AS 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 4 14 98417600 AS Rev C CHAPTER 4 DIGITAL COMMUNICATION 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 EC9841AS for a main LD 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 EC9841AS using the instrument Command mode 4 4 5 1 Bavarian Protocol Command Set Command DA Function Bavarian network command that returns the
112. nalyzer Rear Panel illustration cee 2 2 Automatic zero and span AZS essesceeeeeees 3 30 B Bavarian command Se t ccccceeeseeeceenee 4 8 4 15 Bavarian protocol c ceeccesceeseceeeceeeeseeeeeeeeees 4 11 C Cable Connections illustration 00000000000000000e 4 6 Calibration Apparatus with NO2 Permeation Tube Gll strati n snesen i 3 14 Calibration Menu Manual 0 ccccceeccceeeeee 2 22 Calibration Menu Timed cccececeeeeeeeeneee 2 21 Calibration references ccescceseesseesseeseeeeeeeeees 3 35 Calibration requirements 00 00 eeeeeeeeeeteceeeeeeee 2 39 Calibration standards cccccccccccceesssseeeeees 3 5 3 26 Calibration using GPT oo eee eeeeecneeeeeneeeeeeee 3 15 Calibration using permeation devices 4 3 22 Calibration initial 0 0 0 0 ccc cee ceeeeeeeeeeree 2 12 3 2 Calibration multipoint 0 cee 3 3 3 7 3 13 Calibration multipoint with over ranging 3 30 Command set 9800 ccccceccccceesesseeeeeeeees 4 7 4 16 Command set Bavarian cccccccccesceceeee 4 8 4 15 Communications multidrop 0 0 0 eee eeeeeeeeeeeeeeee 4 13 Connections exhauSt ccccccecsssceceesseeeeeseees 2 6 Connections recorder and DAS ccccceeeeeee 2 2 Connections sample 2a8 cceeeeseeseeeeeeeeeeeeeees 2 6 Connections Serial ccceesceeseeeeeeseceseeeseenneeaee 4 5
113. ng 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 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 below outlines a dynamic calibration and zero span check schedule 98417600 AS Rev C CHAPTER 3 CALIBRATION 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 Il 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 r
114. nsmit 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 4 24 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 4 5 1 Installing the driver on a PC The following are instructions to install the EC9841AS 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 98417600 AS Rev C CHAPTER 4 DIGITAL COMMUNICATION 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 Found New Hardware Wizard Welcome to the Found New Hardware Wizard This wizard helps you install software for Ecotech 9810 Analyser I
115. nual 2 6 3 If necessary 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 EC9841AS NO analyzer Verify that the analyzer responds to automatic calibration sequences The analyzer is now operating correctly FRONT MATTER Table of Contents MANUAL HISTORY tosses cscricic cleusno ee tegatth tire e niee E ducks vane tachi dauch candunceih ad destuysnee del Ear EER 1 1 NKOANA SE Sees trecesad vue cebiebeputacachogdetaen acd Gove A ates Seoaye ack hv S E E 1 2 INTERNATIONALLY RECOGNIZED SYMBOLS USED ON ECOTECH EQUIPMENT ss ssscsccecsesssseceeececeeseseceeeeeceeneaees 1 4 SAFETY REQUIREMENTS O ccseseceecavetocg oaete cep aacdestwsvcedeycdacaeeaysediceysdasnewdertes bessaesacunes cesdupaa ede cee A EEEE SE N AS 1 5 FACTORY SER VICE isis 528088 teles aesiecd deal Gules Aes e EEE E ak led e ea OAE EEEE Gide dea lbanlaaiarakiaie 1 6 CLAIMS FOR DAMAGED SHIPMENTS AND SHIPPING DISCREPANCIES cssccecseseeeeesseeeceesececseceecesseeecneseeeecneeeeeees 1 7 SERVICE AND SPARE PARTS 3 s foccevsevatessaesceresatecese st decdes ba desedy ar a ea ee E aa aN E a RoE A eaen 1 8 MARN N Ga n a a a debs 1 9 LO DESCR
116. o 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 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 EC9841AS 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 analyzer s zero and span to res
117. ommand 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 for the last 100 instantaneous NO readings Noxconc for the last 100 instantaneous NOx readings no2conc 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 lt CR gt lt LF gt where INDEX is the index into the trend buffer 0 oldest point 99 newest point 98417600 AS Rev C 4 21 EC9841AS NOx ANALYZER OPERATION MANUAL 4 22 Formatted as an integer PARAMETER is 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 lt 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 Com
118. on 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 80 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
119. oose 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 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 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 98417600 AS Rev C EC9841AS NOx ANALYZER OPERATION MANUAL INDEX 5 50 Pin Connector Board with Sample Choices illustration 20 0 ee ceceececeessecececeeeenseeeeeenes 2 4 9 9800 command Set ccsescecececeesesseceeeeeees 4 7 4 16 A Analog Output Menu eee cece 2 29 2 31 Analog Output Menu illustration 2 28 2 31 Analog Output Menu Current illustration 2 29 Analog Output Menu Voltage illustration 2 30 Analyzer Keyboard illustration see 2 10 A
120. ortant Use of the EC9841AS 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 98417600 AS Rev C 3 1 EC9841AS 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 EC9841AS 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 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 or YV 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 lt Enter gt 1 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 dig
121. our format Setting the time resets the seconds internally to zero for synchronization with an external clock PASSWORD See section 2 7 Password Protection ERASE MEMORY If yes is selected 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 lt Enter gt will erase the memory in the analyzer Caution If the analyzer memory is erased all user configured parameters will return to their default values In addition all instrument calibration will 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 18 98417600 AS Rev C CHAPTER 2 INSTALLATION amp OPERATION 2 5 4 Measurement Menu MEASUREMENT MENU UNIT SELECTION uG M3 CONVERSION TEMP 0 DEG C DECIMAL PLACES PE i 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 PP
122. pers selecting current make contact with both rows of pins The other jumpers are offset as shown in Figure 2 3 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 and DAs outputs are factory set for 10 volts full scale Other full scale outputs of 5v 1 v and 0 1 v can be selected Select the full scale output for REc and pas When using voltage output the source resistance for both REC and DAs outputs is 1000 ohms The recorder and DAS input resistance should be greater than 500K ohms for a measurement error no greater than 1 98417600 AS Rev C CHAPTER 2 INSTALLATION amp OPERATION 3 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 EC9841AS without the 50 pin I O PCA the analyzer still provides current outputs to drive a strip chart recorder or DAS These outputs are present on the discrete I O connector at th
123. put O to full scale from 0 0 050 ppm to 0 20 ppm with 0 5 and 10 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 2 ppb or 0 1 of concentration reading whichever is greater with Kalman filter active o Analog output 2 ppb or 0 1 of analog output full scale whichever is greater 1 1 3 Lower Detectable Limit o Measurement process Less than 4 ppb or 0 2 of concentration reading whichever is greater with Kalman filter active o Analog output 4 ppb or 0 2 of analog output full scale whichever is greater 1 1 4 Zero Drift o Temperature dependent 1 ppb per C o Time dependent at fixed temperature 24 hours Less than 10 ppb 30 days Less than 10 ppb 1 1 5 Span Drift o Temperature dependent 0 2 per C o Time dependent at fixed temperature 24 hours 0 35 of reading 30 days 2 5 of reading 1 2 98417600 AS Rev C CHAPTER 1 DESCRIPTION 1 1 6 Lag Time Less than 25 seconds 1 1 7 Rise Fall Time 95 of Final Value Less than 90 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 370 mL minute 50 mL minute sample plus 320 mL minute bypass 1 1 11 Sample Pressure Dependence
124. re is below 35 C 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 signal is the logical OR of FLOWFAIL LAMPFAIL CHOPFAIL CVFAIL COOLERFAIL HEATERFAIL REFFAIL PS FAIL and HV FAIL 4 1 2 50 Pin I O Inputs The Doz 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 lt 0 8 V 2V lt high lt 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 98417600 AS Rev C CHAPTER 4 DIGITAL COMMUNICATION Current through the outputs should be kept as low as possible ideally around 1 mA If an external supply is use
125. s optional 98417600 AS Rev C 2 1 EC9841AS NOx ANALYZER OPERATION MANUAL Figure 2 1 Analyzer Rear Panel 2 1 2 1 Recorder and DAS Connections Caution The EC9841AS 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 The 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 RI acquisition system DAS The outputs are illustrated in Figure 2 2 EC and a data 2 2 98417600 AS Rev C CHAPTER 2 INSTALLATION amp OPERATION Figure 2 2 50 Pin 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 AS Rev C 2 3 EC9841AS 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 pins that correspond to the desired printed selections on the front of the board If current is selected only the jum
126. seeeseeeeeeness 3 23 3 9 4 Flush Gas for the Permeation Device sccesccescsseesseesseeseessseseceseceseesecesecusecuaecuaecaaecaaecaeeeseeeaseeeeeneeenees 3 24 3 9 5 Standard NO3 Permeation Devices enoi E E ARE ENRE 3 24 3 9 6 Basic Design Considerations for a Calibration System s sssesesseseeseeesseresrsreesrsreeresresresesrresesreeresrees 3 25 3 10 CERTIFICATION OF WORKING STANDARDS AGAINST NIST TRACEABLE STANDARDS cs scsesscseeseseeeseeee 3 25 3 10 1 NO Working Standards Traced to NIST Standards c cccscsccssssscssesssesecneesecnseescsseeeecueeseeaeenceaeeaseneens 3 26 3 10 2 NO2 Working Standards Traced to NIST Standards 0 c cccccscescecesteseeenseseesenseseeecneesenscsenseesensnsensents 3 28 3 11 CALIBRATION REQUIREMENTS WHEN OVER RANGING IS EMPLOYED cccceceessssececececeessaeceeececeessaeeeeees 3 29 3 12 AUTOMATIC ZERO SPAN CHECKS AZS arciteco rene i E Sat rer i iene ea i i atien 3 30 B12 D VAIA EE E E A A A 3 33 3 12 2 Description Of the AZS Process vsssccissciscssisisseasiesstestiansosesbentacstansbapsdiedsostisesiaeedeeacossseadepshsodtestasesdensacs 3 34 3 13 CALIBRATION REFERENCES veresen erse npes aape ran aE aeaea ES PO ede ve NEN Oe TEESE exeteoch SEAN E ENEAN SP ANENE ESTE i 3 35 4 0 DIGITAL COMMUNICATION sssessesesoesesesecoesosoesesececeerosoeseserceoeroroesesecoroeseseeoeoesoroesesecoeeororoesesesoeeoeeeroroeseseseee 4 1 41 DISCRETE CONTROL oireeni er aeiae pe aa raar rR EN AA N EEA EE ARER E EE AEE
127. ss 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 98417600 AS Rev C CHAPTER 4 DIGITAL COMMUNICATION 9800 Data Downloader Comm Mode xE Connected Figure 4 6 Remote Terminal 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 down until Interface Mode is highlighted 98417600 AS Rev C 4 29 EC9841AS NOx ANALYZER OPERATION MANUAL 4 30 6 Click select 7 Click up or down to change the interface mode to
128. st by simultaneously pressing two keys on the front panel see Figure 2 4 below 1 DISPLAY 3 INSTRUMENT IDENTIFICATION 4 RACK MOUNT OPTION 2 Figure 2 4 Analyzer Front Panel o Contrast Up arrow A and lt Select gt for darker contrast Down arrow Y and lt Select gt 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 lt Select gt 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 AS Rev C 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 Screen Message Instrument Activity MOLYCON IS COLD MOLYCON IS HOT BACKGROUND FILL Cell filling
129. stration cccccceeeceeeeee 2 27 98417600 AS Rev C K Keyboard functions 20 0 0 cee eceseeseesecneeeeeneeeeeens 2 10 M Maii Menuan rn RR E E A 2 17 Main Menu illustration ecceceeeeeeeeeenee 2 17 Manual Calibration Menu c ccccsceeseeeteeeeee 2 22 Manual Calibration Menu illustration 2 22 Measurement Menu c ccccsesceceesteceeeeeeeeeeee 2 19 Measurement Menu illustration ccccce 2 19 Multidrop communications ccsccecseeceeeeeeees 4 13 Multipoint calibration cceeeeees 3 3 3 7 3 13 Multipoint calibration with over ranging 3 30 N NO NOx NO2 Current Output Menu 0 000 00 2 29 NO NOx NO2 Voltage Output Menu 0 0 2 30 O Offset adjustMent eee sees creetecneeeeeneeeeeeee 2 36 Operation Asa meei lease tide a 2 9 Original Protocol ce ceeeeeeeeceeeeeeeecneeeeeeeeeeens 4 10 Output Test Menu ee ceeeeeeeeeeeeeeeeee 2 24 Output Test Menu illustration eee 2 24 Over range adjustment eee ceeeeeeee eee 2 37 Over Range as Seen on a Strip Chart Recorder U1IUStration snn nnr ris 2 38 Over Tanging a iA ed nie aE SREE 3 30 P Password protection eeeeeeseeseseeeeeresserserrreeeress 2 40 Permeation device calibration cc cccceeseeeee 3 22 Preprocessor Pots Menu ccescceeseeceereeeneeeeee 2 24 Preprocessor Pots Menu illustration 2 24 Primary
130. subsequent calibrations where linearity can be assumed a two point calibration zero air point and NO NOx 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 oi 3 Turn on the O generator in the GPT 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 par 4 Calculate the NO concentration generated from the following equation Fyo XLNO lmr INO Jour NO ric NO maL T Eo 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 O in ppm NO nat NO concentration after the addition of O in ppm Fyo NO flow rate in slpm 3 12 98417600 AS Rev C CHAPTER 3 CALIBRATION NO mp concentration of NO2 impurity in the standard NO cylinder in ppm Fy O generator air flow rate in slpm F diluent air flow rate
131. t 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 98417600 AS Rev C 2 27 EC9841AS NOx ANALYZER OPERATION MANUAL 2 28 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 3 are available via the 50 PIN IO connector 2 5 11 Calculation factors CALCULATION FACTORS NO INSTRUMENT GAIN 1 P T F CORRECTION 1 BACKGROUND 0 ZERO OFFSET 0 NOx INSTRUMENT GAIN gt 1 P T F CORRECTION a E BACKGROUND ae Oe NO2 ZERO OFFSET HON CONVERTER EFFICIENCY 91 0592 0390 0012 0000 PPB 0427 0398 0016 0000 PPB 97 EXIT 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 98417600 AS Rev C CHAPTER 2 INSTALLATION amp OPERATION 2 5 12 Interface Menu INTERFACE MENU ANALOG OUTPUT MENU DATA LOGGING MENU MAIN GAS ID 041 INTERFACE MODE COMMAND MUL
132. t 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 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 IOUT3 2 Analog current output 3 Note 2 DOZERO 5 External input to put the instrument into the zero mode DOSPAN 6 External input to put the instrument into the span mode OVERANGE1 T 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 1 ANAIN2 11 Unused analog input 2 IOUT 15 Analog current output 1 Note 3 IOUT2 17 Analog current output 2 Note 4 98417600 AS Rev C 4 1 EC9841AS NOx ANALYZER OPERATION MANUAL Function Signal Name Number SPANCYL 18 OUTSERV 19 ZEROON 20 SPANON 21 ZEROCYL 22 IZSON 23 STARTUP 24 PPM MET 25 USERID1 26 USERID2 27 USERID3 28 USERID4 29 USERID5 30 USERID6 31 USERID7 32 USERID8 33 FLOWFAIL 35 LAMPFAIL 36 4 2 Active output indicates that the instrument is in
133. t sTX gt to the lt ETx gt inclusive The resulting value is converted in a two digit pseudo hex number and sent out as BCC1 and BCC2 Command PI Function Bavarian network command that sets the 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 K for span 4 4 5 2 9800 Command Set 4 16 98417600 AS Rev C CHAPTER 4 DIGITAL COMMUNICATION Note The TERMINATOR can be either a lt CR gt or lt LF gt The lt DEVICE I D gt Three Digit Instrument I D in ASCII Format Command ABORT Function Commands the addressed device to abort the current mode and return to the measure mode Format ABORT lt 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 DAVGC Function Sends the current average concentration data to the serial port Format DAVGC lt DEVICE I D
134. ta 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 I P ADDRESS NETMASK GATEWAY NETWORK ADAPTER MENU 0 0 0 0 0 0 0 0 0 0 0 0 2 5 17 Trend Select Menu TREND SELECT M ENU is the graphic display of the parameters listed 98417600 AS Rev C TREND SELECT MENU NO CONCENTRATION NOx CONCENTRATION NO2 CONCENTRATION NO AVERAGE NOx AVERAGE NO2 AVERAGE ZERO OFFSET SPAN COMPENSATION SAMPLE FLOW SAMPLE PRESSURE CONVERTER TEMP 2 33 EC9841AS NOx ANALYZER OPERATION MANUAL 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 AUG 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 t
135. tart the calibration sequence by pressing either the Up or Down arrow key A or Y 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 lt Enter gt 4 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 From the primary screen as in step 2 start the calibration sequence by pressing either the Up or Down arrow A or Y 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 lt Enter gt 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 NO2 Use the readings on the screen and the known concentrations delivered to the instrument to calculate the converter efficiency NOz measured NO2 expected Next move the cursor to the CONVERTER EFFICIENCY field If
136. ted 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 AS Rev C CHAPTER 3 CALIBRATION 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 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 diluti
137. ted so that the following relationship holds Pk NO ac X tp 2 75 ppm minutes Equation 3 0 7 Fy o Fy Fyol NO pc NO scp 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 O in ppm min NO c NO concentration in the reaction chamber in ppm tg residence time of the reactant gases in the reaction chamber in minutes NO 7p concentration of the undiluted NO standard in ppm Fso NO flow rate in slpm Fo O generator air flow rate in slpm Vec 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 98417600 AS Rev C 3 19 EC9841AS NOx ANALYZER OPERATION MANUAL 1 Determine F the total flow required at the output manifold Fy analyzer demand plus 10 to 50 excess 2 Establish NO yz as the highest NO concentration ppm that will be required at the output manifold NO our should be approximately equivalent to 90 of the URL of the NO concentration range to be covered 3 Determine Fyo as E NO our x Er NO srp 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
138. tes 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 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 1v are available well as digital input control and digital output status The EC9841AS 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 98417600 AS Rev C 1 1 EC9841AS NOx ANALYZER OPERATION MANUAL 1 1 Specifications Note All specifications are referenced to STP standard temperature and pressure 1 1 1 Range o Display Autoranging 0 to 1000 ppm Resolution 0 001 ppm selectable units and decimal places o Analog out
139. 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 AS Rev C 2 11 EC9841AS 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 EC9841AS 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 is externally controlled is via
140. 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 Nn kal pa D byte bit 3 Used in conjunction with the PINID command USER ID byte bit 4 Used in conjunction with the PINID command 0p kal pa H D byte bit 5 Used in conjunction with the PINID command USER ID byte bit 6 Used in conjunction with the PINID command nN kal pa 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 AS Rev C Signal Name CHOPFAIL SPAN OOR SPAREOC1 HEATERFAIL SPAREOC2 ELECTST PS FAIL HV FAIL SYSFAIL POWER_ON
141. 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 keap equal to NO rp and calculates a new f zs as follows 98417600 AS Rev C NO stp NO UNCOMP AZS NO Equation 3 0 23 NO Isr AZS NO gt NO luncomp Equation 3 0 24 EC9841AS NOx ANALYZER OPERATION MANUAL where NO orp or NO srp the certified concentration of the span gas standard at the span gas port The new value of f 7 is then used to compensate subsequent measurement readings until the next AZS cycle Use of a Level 1 span check with SPAN COMP ENABLED adjusts the instrument gain 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 comp 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
142. tions Instrument Menu 00 cccceee 2 17 Illustrations Instrument Status Screen 2 33 Illustrations Interface MeNnU ccceceeeeeeeees 2 27 Illustrations Main Menu c ccccceeeeseceeeeeeeees 2 17 Illustrations Manual Calibration Menu 2 22 Illustrations Measurement Menu 006 2 19 Illustrations Output Test Menu eee 2 24 Illustrations Over Range as Seen on a Strip Chart Recorder ieren eenen eni a e 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 eee 2 35 Illustrations System Temperatures Screen 2 34 Illustrations Test Menu cc cccecseceesseeeeneees 2 23 Illustrations Timed Calibration Menu 2 21 Illustrations Typical GPT Calibration System SCMEMALIC ei r E ARTER 3 8 Illustrations Valve Test Menu cc cccceeee 2 25 Installation iee ee n erie 2 1 Instrument identifiers eceeceeseeeteeeeeeneeeeeees 4 14 Instrument Menu tersinir rarena nni 2 17 Instrument Menu illustration cc ceeeeee 2 17 Instrument Status SCTeN eceeeeeeeseeceeeeeeneeeeee 2 33 Instrument Status Screen illustration 2 33 Interface MeNU cceeceeseeeeceseceseeeeecseeeneeeeeees 2 27 Interface Menu illu
143. to put the unit in the manual span mode if the instrument has an I D of 843 lt STX gt ST843 K lt ETX gt 52 The block check operation is best shown with the following table 98417600 AS Rev C EC9841AS 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 EC9841AS 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 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 a 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
144. tore 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 analyzer s calibration but may indicate the immediate need for a more authoritative Level 1 calibration check 98417600 AS Rev C CHAPTER 3 CALIBRATION When used with a certified traceable NO or NO span standard the EC9841AS automatic zero span AZS feature may be used to automatically carry out a Level 1 calibration check on a periodic basis Further when the instrument s SPAN COMP iS ENABLED the EC9841AS automatically and continually compensates subsequent concentration measurements for any minor calibration drift as follows NO reap fazs no XLENO uxcome Equation 3 0 21 NO Iran f Azs No x NO loncome Equation 3 0 22 where NO peapn and NO kkan the corrected instrument concentration readings based on the span compensation ratio obtained during the previous AZS cycle fazsno and fazsnoo the 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 EC9841AS measures the concentration of the span gas provided to
145. uld allow air to diffuse back into the regulator or this process must be repeated 98417600 AS Rev C CHAPTER 3 CALIBRATION 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 EC9841AS analyzer depends on the efficiency of the analyzer s NO to NO converter The multipoint calibration procedure in this chapter contains a procedure for checking the molycon converter efficiency with an NO concentration generated by GPT 3 6 Multipoint Calibration Procedure Alternative A NO Concentration Standard and GPT The procedure for calibrating the EC9841AS 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 EC9841AS Service Manual Check the SYSTEM FAULTS INSTRUMENT STATUS and SYSTEM TEMPERATURES screens to verify that the analyzer is in good working condition 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 recordin
146. unctions are described below a y TE Pear n yO pe A KSC v LSE lee LSE ne xit Ka Figure 2 5 Analyzer Keyboard The key functions are listed below Up arrow key A 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 W 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 lt Select gt Selects the menu choice or selects the field for input lt Pg Up gt Moves the cursor to the previous page or screen lt Exit gt Leaves a field without making a change or returns the cursor to the main screen lt Enter gt 1 Confirms a menu item or a field selection to the microprocessor 2 3 2 Using the Menu and Making Entries The EC9841AS 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 AS Rev C 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 a fixed series of choices in a wraparound scrolling format o Digit
147. uted NO concentration at the output manifold in ppm Fyo NO flow rate in slpm NO p concentration of the undiluted NO standard in ppm F total flow in slpm 1 The exact NO concentration is calculated from 98417600 AS Rev C 3 21 EC9841AS NOx ANALYZER OPERATION MANUAL F x INO NO NO Jour NO h 2 live T Equation 3 0 15 where NO Jour diluted NO concentration at the output manifold in ppm NO p concentration of NO impurity 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
148. very System scsccscsesscssessceseseesecnsesecueeeecuseesesaecaeesecneeseenaeeeseaees 3 6 3 5 MOLYCON CONVERTER EFFICIENCY cies ssccssesesetestesevensss n stuseesesunese ce save eseusesshenstvecbsestsoss sbevucdssobesdyeoesaneshcovesseoes 3 7 3 6 MULTIPOINT CALIBRATION PROCEDURE ALTERNATIVE A NO CONCENTRATION STANDARD AND GPT 3 7 3 61 PED AVALON seren ick ce resents ne tae a AA N EEE EEE A a Bee ENG E E A E vaUG uk bea cba EAE E 3 7 3 6 2 Zero Measurement secescceseceseesseesseesseeseesseesccsecssecssecuaecesecaaecseecseeeseeeseesseeseeeeeesesesecaeeeecesaecaeeeeeneeeneees 3 8 3 6 3 Span Adjustment sicisecsscesnucca easing i siase iaeaea a aea E ara aia R E orap TE aS Ee SEa aE Ee rakia Si 3 9 3 6 4 Preliminary Converter Efficiency Check u ccccsccesccesecssecsseenseeseesseeseceeecnseeseeseeessecsecaecuaecsaecaaeeaseeseeeaess 3 10 3 6 5 Preparation of the NO and NOx Calibration CUrve c cccccccsceccsseseecenseseescneeecsseseescnsesenscssnseeseenseneenes 3 11 3 6 6 Preparation of the NO2 Calibration Curve ssesesseseesseeeseeeesesereseresesrsreeresresrsserereestnsesrresesrenesreees 3 12 3 6 7 Final Converter Efficiency COCK cccsccscssscsseesceseesceseescesecscesecusesscaeeseecesaeeseesecaeesecsaeeeesaseaesneeeeeaseneeas 3 13 EFF ayy final BEF 6c equation 3 4 SIOPE suriris iiaeie 3 13 3 7 MULTIPOINT CALIBRATION PROCEDURE ALTERNATIVE B NO PERMEATION DEVICE seseseseesereneesesens 3 13 3 8 GUIDELINES FOR CALIBRATION USIN
149. w 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 AS Rev C 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 lt STX gt to lt ETX gt inclusive This block check value is then converted to ASCII format and sent after the lt zTx 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 lt EXT gt 3A The block check calculation is best shown by the following table Character Hex Value Binary Block Check 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
150. well 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 an 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 i
151. y 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 last set Control loops will be reset to ENABLED when the primary screen is displayed TEST MEASURE Software controlled pot that is used by technicians 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 24 98417600 AS Rev C CHAPTER 2 INSTALLATION amp OPERATION 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 47 NO 0 400 PPM CONC VOLTAGE 3 500 VOLTS HIGH VOLTAGE 550 VOLTS Figure 2 15
152. ys as follows 98417600 AS Rev C CHAPTER 4 DIGITAL COMMUNICATION Key Key Label Function Enter ENTER enter 7 HOME exit 9 PG UP page up 8 UP ARROW up 2 DOWN ARROW down 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 The 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 98300 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

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