Thermo Scientific 42i Instruction Manual Download

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Servicing

Vacuum Pump Diaphragm and Valve Replacement

7-10

Model 42

Trace Level Instruction Manual

Thermo Fisher Scientific

Figure 7–4.

Replacing the Pump

Remove both inlet and exhaust lines from the pump.

Install the new pump by following the previous steps in reverse.

Use the following procedures to replace the diaphragm and valve for the
vacuum pumps (

Figure 7–5

Equipment Required:

●

Allen wrench, 4 mm

●

Nut driver, 7/32-inch or 5.5 mm

●

Allen wrench, 3 mm

●

Spanner wrench, 3.8 mm diameter by 4.5 mm long inserts

●

Small flat-blade screwdriver

●

Large flat-blade screwdriver

●

Cleaning agent (alcohol)

●

Fine-grade steel wool

●

“LOC-TITE” blue breakable thread adhesive

Vacuum Pump

Diaphragm and Valve

Replacement

Summary of Contents for 42i

Page 1: ...Model 42i Trace Level Instruction Manual Chemiluminescence NO NO2 NOx Analyzer Part Number 102855 00 20Dec2007 ...

Page 2: ...ons terms and pricing are subject to change Not all products are available in all countries Please consult your local sales representative for details Thermo Fisher Scientific Air Quality Instruments 27 Forge Parkway Franklin MA 02038 1 508 520 0430 www thermo com aqi ...

Page 3: ...ientific has contracted with one or more recycling disposal companies in each EU Member State and this product should be disposed of or recycled through them Further information on Thermo Fisher Scientific s compliance with these Directives the recyclers in your country and information on Thermo Fisher Scientific products which may assist the detection of substances subject to the RoHS Directive a...

Page 4: ......

Page 5: ... provides maintenance procedures to ensure reliable and consistent instrument operation Chapter 6 Troubleshooting presents guidelines for diagnosing analyzer failures isolating faults and includes recommended actions for restoring proper operation Chapter 7 Servicing presents safety alerts for technicians working on the analyzer step by step instructions for repairing and replacing components and ...

Page 6: ...rate the analyzer however if the calibrator is used in a manner not specified by the manufacturer the protection provided by the equipment may be impaired This manual contains important information to alert you to potential safety hazards and risks of equipment damage Refer to the following types of alerts you may see in this manual Safety and Equipment Damage Alert Descriptions Alert Description ...

Page 7: ...lothes wash it off immediately using soap and water Equipment Damage Do not attempt to lift the analyzer by the cover or other external fittings Some internal components can be damaged by small amounts of static electricity A properly grounded antistatic wrist strap must be worn while handling any internal component This adjustment should only be performed by an instrument service technician Handl...

Page 8: ...on manual may cause harmful interference to radio communications Operation of this equipment in a residential area is likely to cause harmful interference in which case the user will be required to correct the interference at his own expense The following symbol and description identify the WEEE marking used on the instrument and in the associated documentation Symbol Description Marking of electr...

Page 9: ...eration 3 1 Display 3 1 Pushbuttons 3 2 Soft Keys 3 3 Software Overview 3 4 Power Up Screen 3 6 Run Screen 3 6 Main Menu 3 7 Range Menu 3 8 Single Range Mode 3 8 Dual Range Mode 3 9 Auto Range Mode 3 11 Gas Units 3 13 NO NO2 and NOx Ranges 3 13 Set Custom Ranges 3 14 Custom Ranges 3 15 Averaging Time 3 15 Calibration Factors Menu 3 16 NO NOx and Prereactor Backgrounds 3 17 NO NO2 and NOx Coefficie...

Page 10: ...Date and Time 3 29 Erase Log 3 30 Select Content 3 30 Concentrations 3 31 Other Measurements 3 32 Analog Inputs 3 32 Commit Content 3 33 Reset to Default Content 3 33 Configure Datalogging 3 34 Logging Period Min 3 34 Memory Allocation Percent 3 35 Data Treatment 3 35 Communication Settings 3 35 Baud Rate 3 36 Instrument ID 3 36 Communication Protocol 3 37 Streaming Data Configuration 3 37 Streami...

Page 11: ...3 52 Volts 3 53 User Value 3 53 Temperature Compensation 3 53 Pressure Compensation 3 54 Screen Contrast 3 54 Service Mode 3 55 Date Time 3 55 Diagnostics Menu 3 56 Program Version 3 56 Voltages 3 57 Motherboard Voltages 3 57 Interface Board Voltages 3 57 I O Board Voltages 3 58 Temperatures 3 58 Pressure 3 59 Flow 3 59 Prereactor Zero 3 59 Analog Input Readings 3 60 Analog Input Voltages 3 60 Dig...

Page 12: ...tration Limits 3 72 Min Trigger 3 72 Service Menu 3 73 PMT Voltage Adjustment 3 73 Range Mode Select 3 74 Converter Set Temperature 3 74 Pressure Calibration 3 75 Calibrate Pressure Zero 3 75 Calibrate Pressure Span 3 76 Restore Default Calibration 3 76 Flow Calibration 3 77 Calibrate Flow Zero 3 77 Calibrate Flow Span 3 78 Restore Default Flow Calibration 3 78 Input Board Calibration 3 79 Manual ...

Page 13: ...dard Against a NIST traceable NO Standard 4 5 Zero Air 4 6 Dynamic Parameter Specifications for Gas Titrator 4 6 Determining GPT System Flow Conditions 4 6 Pre Calibration 4 8 Calibration 4 9 Connect GPT Apparatus to the Analyzer 4 9 Adjust Instrument Gain 4 10 Set Backgrounds to Zero 4 10 Calibrate the NO Channel to the NO Calibration Gas 4 12 Calibrate the NOx Channel to the NOx Calibration Gas ...

Page 14: ... 4 Accessing the Service Mode 7 4 Replacement Parts List 7 4 Cable List 7 6 External Device Connection Components 7 6 Removing the Measurement Bench and Lowering the Partition Panel 7 8 Pump Replacement 7 9 Vacuum Pump Diaphragm and Valve Replacement 7 10 Diaphragm Replacement 7 11 Valve Replacement 7 12 Fan Replacement 7 14 PMT Cooler and Reaction Chamber Assembly Replacement 7 15 Photomultiplier...

Page 15: ...erface Board Replacement 7 44 Flow Transducer Replacement 7 45 Flow Transducer Calibration 7 46 Front Panel Board Replacement 7 48 LCD Module Replacement 7 49 Service Locations 7 50 System Description 8 1 Hardware 8 1 NO2 to NO Converter 8 2 Mode Solenoid 8 2 Reaction Chamber 8 2 Optical Filter 8 3 Pressure Transducer 8 3 Sample Flow Sensor 8 3 Ozonator 8 3 Ozonator Flow Switch 8 3 Photomultiplier...

Page 16: ... Ports 8 11 RS 232 Connection 8 11 RS 485 Connection 8 12 Ethernet Connection 8 12 External Accessory Connector 8 12 Optional Equipment 9 1 Internal Zero Span and Sample Valves 9 1 Ozonator Permeation Dryer 9 1 Ammonia Scrubber 9 2 Teflon Particulate Filter 9 2 Ozone Particulate Filter 9 2 NO2 to NO Converter 9 2 I O Expansion Board Assembly 9 2 Terminal Block and Cable Kits 9 2 Cables 9 3 Mountin...

Page 17: ... C 1 TCP Communication Parameters C 2 Application Data Unit Definition C 2 Slave Address C 2 MBAP Header C 2 Function Code C 3 Data C 3 Error Check C 3 Function Codes C 3 0x01 0x02 Read Coils Read Inputs C 3 0x03 0x04 Read Holding Registers Read Input Registers C 5 0x05 Force Write Single Coil C 7 MODBUS Parameters Supported C 8 Geysitech Bayern Hessen Protocol D 1 Serial Communication Parameters ...

Page 18: ...Contents xiv Model 42i Trace Level Instruction Manual Thermo Fisher Scientific Operating and Error Status D 7 Standards for Trace Level Analyzers E 1 Appendix E ...

Page 19: ...ector in Auto Range Mode 3 12 Figure 4 1 GPT System 4 3 Figure 5 1 Inspecting and Replacing the Capillaries 5 3 Figure 5 2 Rebuilding the Pump 5 6 Figure 6 1 Board Level Connection Diagram Common Electronics 6 6 Figure 6 2 Board Level Connection Diagram Measurement System 6 7 Figure 7 1 Properly Grounded Antistatic Wrist Strap 7 4 Figure 7 2 Component Layout 7 7 Figure 7 3 Removing the Measurement...

Page 20: ... I O Expansion Board Optional 7 42 Figure 7 20 Rear Panel Board Connectors 7 42 Figure 7 21 Replacing the Measurement Interface Board 7 45 Figure 7 22 Replacing the Flow Transducer 7 46 Figure 7 23 Replacing the Front Panel Board and the LCD Module 7 49 Figure 8 1 Hardware Components 8 2 Figure 9 2 Rack Mount Option Assembly 9 5 Figure 9 3 Bench Mounting 9 6 Figure 9 4 EIA Rack Mounting 9 7 Figure...

Page 21: ...erface Board Connector Pin Descriptions 6 13 Table 6 5 Front Panel Board Connector Pin Diagram 6 16 Table 6 6 I O Expansion Board Optional Connector Pin Descriptions 6 18 Table 6 7 Digital Output Board Connector Pin Descriptions 6 19 Table 6 8 Input Board Connector Pin Descriptions 6 20 Table 6 9 Temperature Control Board Connector Pin Descriptions 6 21 Table 7 1 Model 42i Trace Level Replacement ...

Page 22: ... B 9 Analog Current Output Range Values B 42 Table B 10 Analog Voltage Output Range Values B 43 Table B 11 Default Output Assignment B 44 Table C 1 Read Coils for 42i Trace Level C 8 Table C 2 Read Registers for 42i Trace Level C 9 Table C 3 Write Coils for 42i Trace Level C 11 Table D 1 Operating Status for Model 42i Trace Level D 7 Table D 2 Error Status for Model 42i Trace Level D 7 ...

Page 23: ...able single dual auto range modes Multiple user defined analog outputs Analog input options Detection limits of 50 ppt or better Fast response time Linearity through all ranges Standard prereactor for continuous zero correction Independent NO NO2 NOx ranges Replaceable NO2 converter cartridge User selectable digital input output capabilities Standard communications features include RS232 485 and E...

Page 24: ...n Figure 1 1 The sample flows through a capillary and then to the mode solenoid valve The mode solenoid valve determines whether the sample flows through the NO2 to NO converter NOx mode or bypasses the NO2 toNO converter NO mode The sample then flows through the converter output valve and a flow sensor to the prereactor solenoid valve The prereactor solenoid valve directs the sample either to the...

Page 25: ...nnection Figure 1 1 Model 42i Trace Level Flow Schematic Table 1 1 lists the specifications for the Model 42i Trace Level Table 1 1 Model 42i Trace Level Specifications Preset ranges 0 5 10 20 50 100 200 ppb 0 10 20 50 100 200 500 μg m3 Custom ranges 0 50 to 200 ppb 0 10 to 500 μg m3 Zero roise 25 ppt RMS 120 second averaging time Lower detectable limit 50 ppt 120 second averaging time Zero drift ...

Page 26: ...able 5 of full scale over under range 12 bit resolution user programmable Digital outputs 1 power fail relay Form C 10 digital relays Form A user selectable alarm output relay logic 100 mA 200 VDC Digital inputs 16 digital inputs user select programmable TTL level pulled high Serial Ports 1 RS 232 or RS 485 with two connectors baud rate 1200 115200 Protocols C Link MODBUS and streaming data all us...

Page 27: ...le to have two persons lifting one by grasping the bottom in the front and the other by grasping the bottom in the rear Equipment Damage Do not attempt to lift the instrument by the cover or other external fittings The Model 42i Trace Level is shipped complete in two containers If there is obvious damage to the shipping containers when you receive the instrument notify the carrier immediately and ...

Page 28: ...from its shipping container and place next to the instrument Use the following procedure to setup the instrument 1 Connect the sample line to the SAMPLE bulkhead on the rear panel Figure 2 2 Ensure that the sample line is not contaminated by dirty wet or incompatible materials All tubing should be constructed of FEP Teflon 316 stainless steel borosilicate glass or similar tubing with an OD of 1 4 ...

Page 29: ... use the Teflon particulate filter as described in Ozone Particulate Filter on page 9 2 Note Gas must be delivered to the instrument at atmospheric pressure It may be necessary to use an atmospheric bypass plumbing arrangement as shown in Figure 2 3 if gas pressure is greater than atmospheric pressure Figure 2 3 Atmospheric Dump Bypass Plumbing SAMPLE Input Gas Line Vent to Exhaust Line at Atmosph...

Page 30: ... DO NOT connect the pump exhaust port to the EXHAUST bulkhead This can cause permanent damage to both the cooler and the photomultiplier tube 5 Connect a suitable recording device to the rear panel connector For detailed information about connecting to the instrument refer to Connecting External Devices on page 2 5 External Device Connection Components on page 7 6 Terminal Block and Cable Kits on ...

Page 31: ...ponents refer to the Optional Equipment chapter For associated part numbers refer to External Device Connection Components on page 7 6 The following terminal board PCB assemblies are available for iSeries instruments I O terminal board PCB assembly 37 pin standard D O terminal board PCB assembly 37 pin standard 25 pin terminal board PCB assembly included with optional I O Expansion Board Figure 2 ...

Page 32: ...alog1 13 Power_Fail_NC 2 Analog ground 14 Power_Fail_COM 3 Analog2 15 Power_Fail_NO 4 Analog ground 16 TTL_Input1 5 Analog3 17 TTL_Input2 6 Analog ground 18 TTL_Input3 7 Analog4 19 TTL_Input4 8 Analog ground 20 Digital ground 9 Analog5 21 TTL_Input5 10 Analog ground 22 TTL_Input6 11 Analog6 23 TTL_Input7 12 Analog ground 24 Digital ground Component Side Viewed from Top of Board Detail A Detail B A...

Page 33: ...s Pin Signal Description Pin Signal Description 1 Relay1_ContactA 13 Relay7_ContactA 2 Relay1_ContactB 14 Relay7_ContactB 3 Relay2_ContactA 15 Relay8_ContactA 4 Relay2_ContactB 16 Relay8_ContactB 5 Relay3_ContactA 17 Relay9_ContactA 6 Relay3_ContactB 18 Relay9_ContactB 7 Relay4_ContactA 19 Relay10_ContactA 8 Relay4_ContactB 20 Relay10_ContactB 9 Relay5_ContactA 21 not used 10 Relay5_ContactB 22 24...

Page 34: ...ard Pin Descriptions Pin Signal Description Pin Signal Description 1 IOut1 13 Analog_In1 2 Isolated ground 14 Analog_In2 3 IOut2 15 Analog_In3 4 Isolated ground 16 GNDD 5 IOut3 17 Analog_In4 6 Isolated ground 18 Analog_In5 7 IOut4 19 Analog_In6 8 Isolated ground 20 GNDD 9 IOut5 21 Analog_In7 10 Isolated ground 22 Analog_In8 11 IOut6 23 GNDD 12 Isolated ground 24 GNDD 25 Pin Terminal Board Componen...

Page 35: ...the power ON 2 Allow 90 minutes for the instrument to stabilize 3 Set instrument parameters such as operating ranges and averaging times to appropriate settings For more information about instrument parameters see the Operation chapter 4 Before beginning the actual monitoring perform a multipoint calibration as described in the Calibration chapter Startup ...

Page 36: ......

Page 37: ...on page 3 15 Calibration Factors Menu on page 3 16 Calibration Menu on page 3 20 Instrument Controls Menu on page 3 25 Diagnostics Menu on page 3 56 Alarms Menu on page 3 63 Service Menu on page 3 73 Password Menu on page 3 86 The 320 x 240 graphics liquid crystal display LCD shows the sample concentrations instrument parameters instrument controls help and error messages Some menus contain more i...

Page 38: ... Display CAUTION If the LCD panel breaks do not to let the liquid crystal contact your skin or clothes If the liquid crystal contacts your skin or clothes wash it off immediately using soap and water The Pushbuttons allow the user to traverse the various screens menus Figure 3 2 Front Panel Pushbuttons Pushbuttons ...

Page 39: ...etters to easily distinguish them from the operating screens To exit a help screen press or to return to the previous screen or to return to the Run screen Up Down Left Right The four arrow pushbuttons and move the cursor up down left and right or change values and states in specific screens Enter The is used to select a menu item accept set save a change and or toggle on off functions The Soft Ke...

Page 40: ...es the menu driven software as illustrated by the flowchart in Figure 3 3 The Power Up screen shown at the top of the flowchart is displayed each time the instrument is turned on This screen is displayed while the instrument is warming up and performing self checks After the warm up period the Run screen is automatically displayed The Run screen is the normal operating screen It displays the NO NO...

Page 41: ...tor PMT Supply Auto Man Mode Datalogging Settings Comm Settings I O Config Temp Compensation Pres Compensation Screen Contrast Service Mode Date Time Diagnostics Program Version Voltages Temps Pressure Flow Prereactor Zero Analog Input Readings Analog Input Voltages Digital Inputs Relay States Test Analog Outputs Instrument Config Contact Info Alarms Alarms Detected Internal Temp Chamber Temp Cool...

Page 42: ... span zero valve option and is in SAMPLE mode Other modes appear in the same area of the display as ZERO or SPAN For more information about the optional solenoid valves see Chapter 9 Optional Equipment When operating in dual or auto range mode two sets of coefficients are used to calculate the NO NO2 NOx High and Low concentrations Also two averaging times are used one for each range The title bar...

Page 43: ...ation appears above the main menu and submenus in every screen The Service menu is visible only when the instrument is in service mode For more information on the service mode see Service Mode later in this chapter Use and to move the cursor up and down Press to select a choice Press to return to the Main Menu or to return to the Run screen XXLO WCONCENTRATIONXXLO W NO 62 7 PPB NO2 25 5 PPB NOx 88...

Page 44: ...ode and Auto Range Mode below In the Main Menu choose Range SET CUSTOM RANGES In the single range mode the NO NO2 and NOx channels each have one range one averaging time and one span coefficient By default the three analog outputs are arranged on the rear panel connector as shown in Figure 3 4 See Table 3 2 for channels and pin connections Single range mode may be selected from the Range Mode Sele...

Page 45: ...ll channels are user definable If any customization has been made to the analog output configuration the default selections my not apply In the dual range mode there are two independent analog outputs These are labeled simply as the High Range and the Low Range Each channel has its own analog output range averaging time and span coefficient This enables the sample concentration reading to be sent ...

Page 46: ...re arranged on the rear panel connector as shown in Figure 3 5 See Table 3 3 for channels and pin connections Dual range mode may be selected from the Range Mode Select on page 3 74 Figure 3 5 Pin Out of Rear Panel Connector in Dual Range Mode Table 3 3 Default Analog Outputs in Dual Range Mode Channel Connector Pin I O Terminal Pin Description 1 14 1 NO High Range 2 33 3 NO Low Range 3 15 5 NO2 H...

Page 47: ...50 ppb are presented to the high ranges analog outputs When the low range is active the status output is at 0 volts When the high range is active the status output is at half of full scale When the high ranges are active the NO concentration must drop to 85 of the low NO range for the low ranges to become active In addition to each channel having two ranges each channel has two span coefficients T...

Page 48: ...ge 3 74 Figure 3 7 Pin Out of Rear Connector in Auto Range Mode Table 3 4 Default Analog Outputs in Auto Range Mode Channel Connector Pin I O Terminal Pin Description 1 14 1 NO Analog Output 2 33 3 NO2 Analog Output 3 15 5 NOx Analog Output 4 34 7 Range Status half scale high range zero scale low range 5 17 9 None 6 36 11 None Ground 16 18 19 35 37 2 4 6 8 10 12 Signal Ground Note All channels are...

Page 49: ...the user s standard temperature is different from 20 C A display warning will appear that ranges will be defaulted and calibration parameters reset GAS UNITS CURRENTLY PPB SET TO UG M3 AND SET RANGES AND CAL TOX DEFAULT SETTINGSXXXXXXXXXX ª CHANGE VALUE SAVE RANGE AVG DIAGS ALARM The NO NO2 and NOx Ranges screen defines the concentration range of the analog outputs For example a NO2 range of 0 50 ...

Page 50: ... Ranges ppb μgm3 5 10 10 20 20 50 50 100 100 200 200 500 C1 C1 C2 C2 C3 C3 C1 C2 and C3 are custom ranges For more information about custom ranges see Set Custom Ranges below The Custom Ranges Menu lists three custom ranges C1 C2 and C3 Custom ranges are user defined ranges In the ppb mode any value between 5 and 200 ppb can be specified as a range In the μg m3 mode any value between 10 and 500 μg...

Page 51: ... seconds over which NO NO2 and NOx measurements are taken The average concentration of the NO NO2 and NOx readings are calculated for that time period The front panel display and analog outputs are updated every 10 seconds for averaging times between 10 and 300 seconds An averaging time of 10 seconds for example means that the average concentration of the last 10 seconds will be output at each upd...

Page 52: ...orrect the NO NO2 and NOx concentrations readings that the instrument generates using its own internal calibration data The Calibration Factors menu displays the calibration factors The screens below show the calibration factors menu in single mode and dual auto range modes The only difference between the screens are the words HI and LO to indicate which range is displayed Normally the instrument ...

Page 53: ...re used to perform a manual zero calibration of the instrument Before performing a zero calibration allow the analyzer to sample zero air until stable readings are obtained The NO channel should be calibrated first The NO NOx and Prereactor Background screens operate the same way Therefore the following description of the NO background applies to the NOx and Prereactor background screens as well T...

Page 54: ...ding disappears In the Main Menu choose Calibration Factors NO NOx or Prereactor Bkg NO BACKGROUND NO 0 09 SET BKG TO 0 00 ª INC DEC SAVE VALUE RANGE AVG DIAGS ALARM The NO NO2 and NOx span coefficient are usually calculated by the instrument processor during calibration The span coefficients are used to correct the NO NO2 and NOx readings The NO and NOx span coefficients normally has a value near...

Page 55: ...EFFICIENT NO 51 4 SET COEF TO 1 000 ª INC DEC SAVE VALUE RANGE AVG DIAGS ALARM The Calibration Pressure screen reports the reactor pressure at which current calibration was performed The screen also allows this value to be edited by the operator This value should not be changed unless a complete manual calibration is being performed The calibration pressure is set equal to the reactor pressure at ...

Page 56: ...lled in single range mode The calibration procedure is the same in dual auto or single range however there are two sets of gas coefficients in dual or auto range i e low and high coefficients This enables each range to be calibrated separately When calibrating the instrument in dual or auto range be sure to use a low span gas to calibrate the low range and a high span gas to calibrate the high ran...

Page 57: ...ine of the display shows the current NO reading It is important to note the averaging time when calibrating The longer the averaging time the more accurate the calibration will be To be most accurate use the 300 second averaging time For more information about calibration see Chapter 4 Calibration In the Main Menu choose Calibration Cal Prereactor Zero Cal NO or Cal NOx Background NO BACKGROUND NO...

Page 58: ... note the averaging time when calibrating The longer the averaging time the more accurate the calibration will be To be most accurate use the 300 second averaging time For more information about calibration see Chapter 4 Calibration In the Main Menu choose Calibration Cal NO NO2 or NOx Coefficient CALIBRATE NO NO 25 5 SPAN CONC 0001 000 MOVE CURSOR ª CHANGE VALUE SAVE RANGE AVG DIAGS ALARM The Cal...

Page 59: ...ZERO DURATION MIN 30 SPAN DURATION MIN 30 PURGE DURATION MIN 30 ZERO SPAN AVG SEC 60 ª RANGE AVG DIAGS ALARM ZERO CAL RESET OFF SPAN CAL RESET OFF ZERO SPAN RATIO 1 The Next Time screen is used to view and set the next zero span check date and time Once the initial zero span check is performed the date and time of the next zero span check is calculated and displayed In the Main Menu choose Calibra...

Page 60: ...k is done first followed by the span check To perform just a zero check set the span and purge duration screen to 0 off The same applies to perform just a span or purge check In the Main Menu choose Calibration Zero Span Check Zero Span or Purge Duration Min ZERO DURATION CURRENTLY 30 MIN SET TO 31 MIN MOVE CURSOR ª CHANGE VALUE SAVE RANGE AVG DIAGS ALARM The Zero Span Averaging Time screen allows...

Page 61: ... may be set from 1 to 10 with 1 as default In the Main Menu choose Calibration Zero Span Check Zero Span Ratio ZERO SPAN RATIO CURRENTLY 1 1 SET TO 2 1 ª CHANGE VALUE SAVE VALUE RANGE AVG DIAGS ALARM The Instrument Controls menu contains a number of items The software controls listed in this menu enable control of the listed instrument functions In the Main Menu choose Instrument Controls INSTRUME...

Page 62: ...r is turned off This is done to prevent the ozonator from overheating which will result in permanent damage to the ozonator or if the converter temperature drops below the minimum limit which reduces the effectiveness of the ozone destruct It is possible however to override the ozonator shut off due to converter temperature being out of range by setting the ozonator safety OFF in the Service Mode ...

Page 63: ...pen position so that the sample gas bypasses the NO2 to NO converter Therefore only the NO concentration is determined The manual NOx mode puts the mode solenoid valve into the closed position so that the sample gas passes through the NO2 to NO converter Therefore only the NOx concentration is determined In the manual modes additional averaging times of 1 2 and 5 seconds are available from the Ave...

Page 64: ...ose Instrument Controls Datalogging Settings Select SREC LREC SELECT LOG TYPE CURRENTLY SREC SET TO LREC TOGGLE VALUE RANGE AVG DIAGS ALARM The View Logged Data screen is used to select the start point to view the logged data by number of records or date and time In the Main Menu choose Instrument Controls Datalogging Settings Select SREC or LREC View Logged Data SELECT START POINT BY SET TO OF RE...

Page 65: ...0 05 FC0088900 10 04 06 20 05 FC0088900 ª PGUP DN PAN L R RANGE AVG DIAGS ALARM The Date and Time screen is used to set a start date and time for which to view logged data For example if 20 JUN 2005 10 00 is entered then the first logged data record that is displayed is the first record after this time If set to one minute logging this would be at 20 JUN 2005 10 01 DATE AND TIME 20 JUN 2005 10 00 ...

Page 66: ...o use and a submenu list of the analog output signal group choices to choose from Choices are Concentrations Other Measurements and Analog Inputs if the I O expansion board is installed This is a temporary list of items for the selected record type that must be committed via the datalogging menu before the changes will apply Note that committing any changes to this list will erase all currently lo...

Page 67: ...s tied to the selected field item The selected item is shown by after it Note that at this point pressing indicates that these are proposed changes as opposed to implemented changes To change the selected record format and erase record log file data see Commit Content below Range NOx is visible only in auto range mode In the Main Menu choose Instrument Controls Datalogging Settings Select Content ...

Page 68: ...Content below In the Main Menu choose Instrument Controls Datalogging Settings Select Content Select Field Other Measurements OTHER MEASUREMENTS NONE INT TEMP CHAMBER TEMP COOLER TEMP NO2 CNV TEMP CHAMBER PRES FLOW ª RANGE AVG DIAGS ALARM PMT VOLTS OZONATOR FLOW The Analog Inputs screen allows the user to select the output signal none or analog inputs 1 8 that is tied to the selected field item Th...

Page 69: ...l group choices see Select Content above In the Main Menu choose Instrument Controls Datalogging Settings Commit Content The Reset to Default Content screen is used to reset all of the datalogging field items to default values For more information about selecting the analog output signal group choices see Select Content above In the Main Menu choose Instrument Controls Datalogging Settings Reset t...

Page 70: ... Logging Period Min screen is used to select the logging period in minutes for the record format srec or lrec List of choices include off 1 5 15 30 and 60 minutes default In the Main Menu choose Instrument Controls Datalogging Settings Configure Datalogging Logging Period Min SET PERIOD FOR SREC CURRENTLY 60 MIN SET TO OFF MIN ª CHANGE VALUE SAVE RANGE AVG DIAGS ALARM Configure Datalogging Logging...

Page 71: ... Treatment screen is used to select the data type for the selected record type whether the data should be averaged over the interval the minimum or maximum measured during the interval or the current value last value measured Data treatment doesn t apply to all data just to the concentration measurement All other data points log the current value at the end of the interval In the Main Menu choose ...

Page 72: ...RRENTLY 9600 SET TO 19200 ª CHANGE VALUE SAVE VALUE RANGE AVG DIAGS ALARM The Instrument ID screen allows the operator to edit the instrument ID The ID is used to identify the instrument when using the C Link or MODBUS protocols to control the instrument or collect data It may be necessary to edit the ID number if two or more of the same instrument are connected to one computer Valid Instrument ID...

Page 73: ...DIAGS ALARM The Streaming Data Configuration menu is used to allow for configuration of the 8 streaming data output items streaming interval current data format and current timestamp setting The Choose Item Signal submenu displays a list of the analog output signal group choices to choose from Choices are Concentrations Other Measurements and Analog Inputs if the I O expansion board option is inst...

Page 74: ...onfig Streaming Data Interval STREAMING DATA INTERVAL CURRENTLY 10 SEC SET TO 20 SEC ª CHANGE VALUE SAVE VALUE RANGE AVG DIAGS ALARM The Concentrations screen allows the user to select the output signal that is tied to the selected streaming data item The selected item is shown by after it In dual or auto range mode HI or LO is displayed to indicate high or low concentrations Range NOx is visible ...

Page 75: ...ARM PMT VOLTS OZONATOR FLOW The Analog Inputs screen allows the user to select the analog input signal none or analog inputs 1 8 that is tied to the selected streaming data item The selected item is shown by after it In the Main Menu choose Instrument Controls Communication Settings Streaming Data Config Select Item Analog Inputs ANALOG INPUTS NONE ANALOG IN 1 ANALOG IN 2 ANALOG IN 3 ANALOG IN 4 A...

Page 76: ...USE DHCP OFF IP ADDR 10 209 43 237 NETMASK 255 255 254 0 GATEWAY 10 209 42 1 HOST NAME iSeries RANGE AVG DIAGS ALARM The Use DHCP screen is used to specify whether to use DHCP or not When DHCP is enabled the network dynamically provides an IP address for the instrument In the Main Menu choose Instrument Controls Communication Settings TCP IP Settings Use DCHP TCP IP Settings Use DHCP RS 232 RS 485...

Page 77: ...P IP Settings IP Address IP ADDRESS CURRENT 10 209 43 237 SET TO 10 209 43 237 1 MOVE CURSOR ª CHANGE VALUE SAVE VALUE RANGE AVG DIAGS ALARM The Netmask screen is used to edit the netmask The netmask is used to determine the subnet for which the instrument can directly communicate to other devices on The netmask can only be changed when DHCP is OFF For more information on DHCP see Use DHCP above I...

Page 78: ...AVE VALUE RANGE AVG DIAGS ALARM The host name screen is used to edit the host name When DHCP is enabled this name is reported to the DHCP server In the Main Menu choose Instrument Controls Communication Settings TCP IP Settings Host Name HOST NAME CURRENT ISERIES ISERIES SSSSS ABCDEFGHIJKLMN BKSP OPQRSTUVWXYZ PAGE 0123456789 SAVE RANGE AVG DIAGS ALARM The I O Configuration menu deals with configur...

Page 79: ...trols I O Configuration Output Relay Settings OUTPUT RELAY SETTINGS 1 NOP GEN ALARM 2 NOP NONE 3 NOP UNITS 4 NOP CONC ALARM 5 NOP NONE 6 NOP NONE 7 NOP NO MODE ª RANGE AVG DIAGS ALARM The Logic State screen is used to change the I O relay to either normally open or normally closed Press to toggle and set the logic state open or closed OUTPUT RELAY SETUP LOGIC STATE OPEN INSTRUMENT STATE RANGE AVG ...

Page 80: ...oard status alarm is only present if the I O expansion board is installed The zero and span check calibration alarms are only present if the zero span valve option is installed and the instrument is operating in manual mode In the Main Menu choose Instrument Controls I O Configuration Output Relay Settings Select Relay Instrument State Alarms ALARM STATUS ITEMS NONE GEN ALARM NO CONC MAX NO CONC M...

Page 81: ...ays a list of the 16 digital inputs available and allows the user to select the logic state and instrument parameter for the relay selected Note The digital inputs must be asserted for at least one second for the action to be activated In the Main Menu choose Instrument Controls I O Configuration Digital Input Settings DIGITAL INPUT SETTINGS 1 NOP NO MODE 2 NOP NOX MODE 3 NOP SET BACKGROUND 4 NOP ...

Page 82: ...se Instrument Controls I O Configuration Digital Input Settings Select Relay Instrument Action CHOOSE ACTION NONE ZERO MODE SPAN MODE NO MODE NOX MODE SET BACKGROUND CAL TO LO SPAN ª RANGE AVG DIAGS ALARM AOUTS TO ZERO AOUTS TO FS CAL TO HI SPAN The Analog Output Configuration menu displays a list of the analog output channels available for configuration Channel choices include all voltage channel...

Page 83: ...age outputs are 0 100 mV 0 1 0 5 0 10 V In the Main Menu choose Instrument Controls I O Configuration Analog Output Config Select Channel Select Range SELECT OUTPUT RANGE SELECTED OUTPUT V ALL CURRENTLY 0 10V SET TO 0 5V ª CHANGE VALUE SAVE RANGE AVG DIAGS ALARM The Minimum Value screen is used to edit the zero 0 to full scale 100 value in percentages for the selected analog output channel See Tab...

Page 84: ...Setting LO NOx Zero 0 Range Setting HI NO Zero 0 Range Setting HI NO2 Zero 0 Range Setting HI NOx Zero 0 Range Setting Prereactor Zero 0 Range Setting LO Prereactor Zero 0 Range Setting HI Prereactor Zero 0 Range Setting Range NOx Recommend not to change the setting for this output Internal Temp User set alarm min value User set alarm max value Chamber Temp User set alarm min value User set alarm ...

Page 85: ...only in auto range mode The Concentrations screen is shown below See Table 3 7 below for a list of items for each signal group choice In the Main Menu choose Instrument Controls I O Configuration Analog Output Config Select Channel Choose Signal to Output CHOOSE SIGNAL TYPE CONCENTRATIONS OTHER MEASUREMENTS ANALOG INPUTS RANGE AVG DIAGS ALARM CHOOSE SIGNAL CONC SELECTED OUTPUT V1 CURRENTLY NO SET ...

Page 86: ...onfiguration This screen is only displayed if the I O expansion board option is installed Configuration includes entering descriptor units decimal places choice of 1 10 points in the table and corresponding number of points selected In the Main Menu choose Instrument Controls I O Configuration Analog Input Config ANALOG INPUT CONFIG CHANNEL 1 IN1 CHANNEL 2 IN2 CHANNEL 3 IN3 CHANNEL 4 IN4 CHANNEL 5...

Page 87: ...s the user to enter the units for the selected analog input channel The units are displayed on the diagnostic screen and in datalogging and streaming data The units may be from 1 to 3 characters in length and defaults to V volts In the Main Menu choose Instrument Controls I O Configuration Analog Input Config Select Channel Units ANALOG INPUT UNITS CURRENTLY V VN1 ABCDEFGHIJKLMN BKSP OPQRSTUVWXYZ ...

Page 88: ... 2 to 10 with a default of 2 In the Main Menu choose Instrument Controls I O Configuration Analog Input Config Select Channel Table Points NUMBER OF TABLE POINTS CURRENTLY 2 SET TO 10 ª CHANGE VALUE SAVE VALUE RANGE AVG DIAGS ALARM The Table Point submenu allows the user to set up an individual table point In the Main Menu choose Instrument Controls I O Configuration Analog Input Config Select Cha...

Page 89: ...onversion table from 9999999 to 99999999 The default table is a two point table with point 1 0 00 V 000 0 U and point 2 10 00 V 10 0 U In the Main Menu choose Instrument Controls I O Configuration Analog Input Config Select Table Point User Value TABLE POINT 01 USER VAL CURRENTLY 0 00 SET TO 00000 00 MOVE CURSOR ª CHANGE VALUE SAVE RANGE AVG DIAGS ALARM Temperature compensation provides compensati...

Page 90: ...determined This empirical data is used to compensate for any change in reaction chamber pressure When pressure compensation is on the first line of the display represents the current pressure in the reaction chamber When pressure compensation is off the first line of the display shows the factory standard pressure of 300 mmHg In the Main Menu choose Instrument Controls Pressure Compensation PRESSU...

Page 91: ...diagnosing the Model 42i Trace Level For more information about the service mode see Service Menu later in this chapter Note The service mode should be turned off when finished as it prevents remote operation In the Main Menu choose Instrument Controls Service Mode SERVICE MODE CURRENTLY OFF SET TO ON TOGGLE VALUE RANGE AVG DIAGS ALARM The Date Time screen allows the user to view and change the sy...

Page 92: ...TOR ZERO ANALOG INPUT READINGS ª RANGE AVG DIAGS ALARM ANALOG INPUT VOLTAGES DIGITAL INPUTS RELAY STATES TEST ANALOG OUTPUTS INSTRUMENT CONFIGURATION CONTACT INFORMATION The Program Version screen read only shows the version number of the program installed Prior to contacting the factory with any questions regarding the instrument please note the product model name and program version number In th...

Page 93: ...O expansion board option is installed In the Main Menu choose Diagnostics Voltages VOLTAGES MOTHERBOARD INTERFACE BOARD I O BOARD RANGE AVG DIAGS ALARM The Motherboard screen read only is used to display the current voltage readings on the motherboard In the Main Menu choose Diagnostics Voltages Motherboard Voltages MOTHERBOARD VOLTAGES 3 3 SUPPLY 3 3 V 5 0 SUPPLY 5 0 V 15 0 SUPPLY 15 0 V 24 0 SUP...

Page 94: ... if the I O expansion board option is installed In the Main Menu choose Diagnostics Voltages I O Board Voltages I O BOARD VOLTAGES 3 3 SUPPLY 3 3 V 5 0 SUPPLY 5 0 V 24 0 SUPPLY 24 0 V 3 3 SUPPLY 3 3 V RANGE AVG DIAGS ALARM The Temperatures screen read only displays the internal temperature reaction chamber temperature cooler temperature and converter temperatures The internal temperature is the ai...

Page 95: ...ow screen read only displays the flow rate The flow is measured by internal flow sensors For more information see Introduction In the Main Menu choose Diagnostics Flow FLOW 0 700 LPM OZONATOR FLOW OK RANGE AVG DIAGS ALARM The Prereactor Zero screen read only displays the current prereactor background zero reading In dual or auto range modes low range and high range are displayed The example below ...

Page 96: ... 9 86 V FL2 1 865 LPM IO7 0 0 Vª RANGE AVG DIAGS ALARM The Analog Input Voltages screen read only displays the 8 raw analog voltage readings if the I O expansion board option is installed In the Main Menu choose Diagnostics Analog Input Voltages ANALOG INPUT VOLTAGES ANALOG IN 1 6 24 V ANALOG IN 2 4 28 V ANALOG IN 3 0 00 V ANALOG IN 4 0 00 V ANALOG IN 5 0 00 V ANALOG IN 6 0 00 V ANALOG IN 7 0 00 V...

Page 97: ... States Press to toggle and set the relay state open or closed RELAY STATE OUTPUT 1 0 OUTPUT 2 0 OUTPUT 3 0 OUTPUT 4 1 OUTPUT 5 0 OUTPUT 6 0 OUTPUT 7 1ª RANGE AVG DIAGS ALARM The Test Analog Outputs menu contains a number of digital to analog converter DAC calibration items Channel choices include all analog outputs 6 voltage channels and 6 current channels if the I O expansion board option is ins...

Page 98: ...O FULL SCALE ª SET TO ZERO RESET TO NORMAL RANGE AVG DIAGS ALARM The Instrument Configuration screen displays information on the hardware configuration of the instrument Note If the analyzer is in service mode pressing on the item will toggle it yes or no with the exception of purchased options such as dilution and auto calibration In the Main Menu choose Diagnostics Instrument Configuration INSTR...

Page 99: ...n item and its minimum and maximum limits move the cursor to the item and press Items displayed are determined by the options installed The zero span check and auto calibration screens are visible only if the zero span check or auto calibration options are enabled The motherboard status interface board status and I O Expansion board status if installed indicate that the power supplies are working ...

Page 100: ...e Minimum Internal Temperature alarm limit screen is used to change the minimum internal temperature alarm limit The minimum and maximum internal temperature screens function the same way In the Main Menu choose Alarms Internal Temp Min or Max INTERNAL TEMPERATURE ACTUAL MIN 15 0 o C SET MIN TO 16 0 o C ª INC DEC SAVE VALUE RANGE AVG DIAGS ALARM The Chamber Temperature screen displays the current ...

Page 101: ...Max CHAMBER TEMPERATURE ACTUAL MIN 47 0 o C SET MIN TO 48 0 o C ª INC DEC SAVE VALUE RANGE AVG DIAGS ALARM The Cooler Temperature screen displays the current cooler temperature and sets the minimum and maximum alarm limits Acceptable alarm limits range from 40 to 10 C If the cooler temperature reading goes beyond either the minimum or maximum limit an alarm is activated The word ALARM appears in t...

Page 102: ...ble alarm limits range from 300 to 700 C The actual alarm setpoints should be set for the installed converter If the converter temperature reading goes beyond either the minimum or maximum limit an alarm is activated The word ALARM appears in the Run screen and in the Main Menu In the Main Menu choose Alarms Converter Temp CONVERTER TEMPERATURE ACTUAL 320 7 o C MIN 300 0 o C MAX 350 0 o C RANGE AV...

Page 103: ...ng goes beyond either the minimum or maximum limit an alarm is activated The word ALARM appears in the Run screen and in the Main Menu In the Main Menu choose Alarms Pressure PRESSURE ACTUAL 232 5 mmHg MIN 200 0 mmHg MAX 450 0 mmHg RANGE AVG DIAGS ALARM The Minimum Pressure alarm limit screen is used to change the minimum temperature alarm limit The minimum and maximum pressure screens function th...

Page 104: ... change the minimum sample flow alarm limit The minimum and maximum flow screens function the same way In the Main Menu choose Alarms Flow Min or Max FLOW ACTUAL MIN 0 750 LPM SET MIN TO 0 760 LPM ª INC DEC SAVE VALUE RANGE AVG DIAGS ALARM The Ozonator Flow screen read only is used to display the ozonator flow readings If the ozonator flow reading is 0 050 LPM 50 cc or below an alarm is activated ...

Page 105: ...s Zero or Span Check ZERO CHECK ALARM OK RESPONSE 0 0 MAX OFFSET 10 0 RANGE AVG DIAGS ALARM The Max Zero Check Offset screen is used to change the maximum zero check offset The maximum zero and span offset screens function the same way In the Main Menu choose Alarms Zero or Span Check Max Offset MAX ZERO CHECK OFFSET CURRENTLY 10 0 SET TO 00011 00 MOVE CURSOR ª CHANGE VALUE SAVE RANGE AVG DIAGS AL...

Page 106: ... minimum value or a ceiling trigger alarm is triggered when the concentration goes above the minimum value If the NO concentration goes beyond either the minimum or maximum limit an alarm is activated The word ALARM appears in the Run screen and in the Main Menu The NO2 and NOx concentration screens function the same way In the Main Menu choose Alarms NO NO2 or NOx Concentration NO CONCENTRATION A...

Page 107: ...rms Select Concentration Min Trigger MIN TRIG CEILING FLOOR ACTUAL TRIGGER CEILING SET TRIGGER TO FLOOR TOGGLE AND SAVE VALUE RANGE AVG DIAGS ALARM The Zero Concentration screen displays the current zero concentration and sets the minimum and maximum alarm limits Acceptable alarm limits range from 0 to 2 ppb and 0 to 5 μg m3 The minimum alarm may be programmed as a floor trigger alarm is triggered...

Page 108: ...TION ACTUAL MIN 0 0 SET MIN TO 00020 00 MOVE CURSOR ª CHANGE VALUE SAVE RANGE AVG DIAGS ALARM The Minimum Trigger screen allows the user to view and set the Zero concentration alarm trigger type to either floor or ceiling The minimum alarm may be programmed as a floor trigger alarm is triggered when the concentration falls below the minimum value or a ceiling trigger alarm is triggered when the co...

Page 109: ... In the Main Menu choose Service SERVICE PMT VOLTAGE ADJUSTMENT RANGE MODE SELECT CONVERTER SET TEMP PRESSURE CALIBRATION FLOW CALIBRATION INPUT BOARD CALIBRATION TEMPERATURE CALIBRATION ª RANGE AVG DIAGS ALARM ANALOG OUT CAL ANALOG INPUT CALIBRATION OZONATOR SAFETY DILUTION RATIO DISPLAY PIXEL TEST RESTORE USER DEFAULTS The PMT Voltage Adjustment screen is used to manually adjust the PMT supply v...

Page 110: ... SINGLE SET TO DUAL ª CHANGE VALUE SAVE VALUE RANGE AVG DIAGS ALARM The Converter Set Temperature screen is used to change the converter set temperature The converter set temperature reading is updated every second The converter set temperature screen is visible only when the instrument is in service mode For more information on the service mode see Service Mode earlier in the chapter Note This ad...

Page 111: ...rvice mode see Service Mode earlier in this chapter The pressure sensor s zero counts and span slope are displayed on the menu Note This adjustment should only be performed by an instrument service technician In the Main Menu choose Service Pressure Calibration PRESSURE SENSOR CAL ZERO 72 SPAN 1 1416 SET DEFAULTS RANGE AVG DIAGS ALARM The Calibrate Pressure Zero screen calibrates the pressure sens...

Page 112: ...eading ambient pressure before performing the span calibration The operator should use an independent barometer to measure the ambient pressure and enter the value on this screen before calibrating In the Main Menu choose Service Pressure Calibration Span CALIBRATE PRESSURE SPAN CURRENTLY 232 0 mmHg SET TO 760 0 mmHg MOVE CURSOR ª CHANGE VALUE SAVE RANGE AVG DIAGS ALARM The Restore Default Calibra...

Page 113: ...stment should only be performed by an instrument service technician In the Main Menu choose Service Flow Calibration FLOW SENSOR CAL ZERO 200 SPAN 1 0000 SET DEFAULTS RANGE AVG DIAGS ALARM The Calibrate Flow Zero screen calibrates the flow sensor at zero flow Note The pump must be disconnected before performing the zero calibration In the Main Menu choose Service Flow Calibration Zero Flow Calibra...

Page 114: ...n this screen to perform the calibration In the Main Menu choose Service Flow Calibration Span CALIBRATE FLOW SPAN CURRENTLY 1 000 LPM SET TO 0 800 LPM MOVE CURSOR ª CHANGE VALUE SAVE RANGE AVG DIAGS ALARM The Restore Default Flow Calibration screen allows the user to reset the flow calibration configuration values to factory defaults In the Main Menu choose Service Select Flow Calibration A or B ...

Page 115: ...BRATION MANUAL INPUT CAL AUTOMATIC INPUT CAL INPUT FREQUENCY DISP RANGE AVG DIAGS ALARM The Manual Input Calibration screen is used to do a manual calibration of the input board A D stages per the following procedure Note The measurement system and the PMT are both shut off inside this screen 1 In the Main Menu choose Service Input Board Calibration Manual Input Calibration 2 Press to leave warnin...

Page 116: ...input board The gain setting and test mode are reset upon exiting this screen In the Main Menu choose Service Input Board Calibration Input Frequency Display Press to leave warning screen Use and to toggle the test signal and bypass the PMT Use and to change the gain between 1 10 and 100 Automatic Input Calibration Input Frequency Display INPUT BOARD CALIBRATION TO CALIBRATE WARNING xTHIS ACTION M...

Page 117: ... AVG DIAGS ALARM The Analog Output Calibration menu is a selection of 6 voltage channels and 6 current channels if I O expansion board option is installed to calibrate and allows the user to select the calibration action zero or span The analog output calibration is visible only when the instrument is in service mode For more information on the service mode see Service Mode earlier in the chapter ...

Page 118: ... output and adjust the output until it reads 0 0 V on the meter In the Main Menu choose Service Analog Out Calibration Select Channel Calibrate Zero ANALOG OUTPUT CAL ZERO CONNECT METER TO OUTPUT SELECTED OUTPUT V1 SET TO 100 SAVE VALUE ª INC DEC SET OUTPUT TO 0 0 V RANGE AVG DIAGS ALARM The Analog Output Calibrate Full Scale screen allows the user to calibrate the full scale state of the selected...

Page 119: ...isible only when the instrument is in service mode For more information on the service mode see Service Mode earlier in the chapter Note This adjustment should only be performed by an instrument service technician In the Main Menu choose Service Analog Input Calibration ANALOG INPUT CAL INPUT CHANNEL 1 INPUT CHANNEL 2 INPUT CHANNEL 3 INPUT CHANNEL 4 INPUT CHANNEL 5 INPUT CHANNEL 6 INPUT CHANNEL 7 ...

Page 120: ...ice Analog Input Calibration Select Channel Calibrate Full Scale Hook up a voltage source of 10 V to the analog input channel ANALOG INPUT CAL SPAN PROVIDE VOLTAGE TO INPUT SELECTED INPUT INPUT1 CURRENTLY 6 24 V SET TO 10 00 V CALIBRATE INPUT TO ZERO RANGE AVG DIAGS ALARM The Ozonator Safety screen is used to turn the ozonator safety feature on or off If the ozonator safety is turned off the ozona...

Page 121: ...ble if the dilution ratio option is installed In the Main Menu choose Service Dilution Ratio DILUTION RATIO CURRENTLY 001 0 1 SET TO 002 0 1 MOVE CURSOR ª CHANGE VALUE SAVE RANGE AVG DIAGS ALARM The Display Pixel Test is used to test the LCD display The display pixel test is visible only when the instrument is in service mode For more information on the service mode see Service Mode earlier in the...

Page 122: ... none of the settings may be changed via the front panel user interface The items visible under the password menu are determined by the instrument s password status In the Main Menu choose Password PASSWORD MENU SET PASSWORD LOCK INSTRUMENT CHANGE PASSWORD REMOVE PASSWORD UNLOCK INSTRUMENT RANGE AVG DIAGS ALARM The Set Password screen is used to set the password to unlock the front panel The set p...

Page 123: ...FRONT PANEL XXXPRESSING ENTER WILLXXXX PREVENT USER FROM CHANGING XCONFIG FROM FRONT PANELXX LOCK AND RETURN TO RUN RANGE AVG DIAGS ALARM The Change Password is used to change the password used to unlock the instrument s front panel The change password is shown if the instrument is unlocked In the Main Menu choose Password Change Password ENTER NEW PASSWORD RANGXXXXXE ABCDEFGHIJKLMN BKSP OPQRSTUVW...

Page 124: ...URRENT PASSWORDXX XXXAND DISABLE LOCKINGXXXX REMOVE PASSWORD RANGE AVG DIAGS ALARM The Unlock Instrument screen is used to enter the password to unlock the front panel The unlock instrument is shown if the instrument is locked In the Main Menu choose Password Unlock Instrument ENTER NEW PASSWORD RANGXXXXXE ABCDEFGHIJKLMN BKSP OPQRSTUVWXYZ PAGE 0123456789 SAVE RANGE AVG DIAGS ALARM Unlock Instrumen...

Page 125: ...on is known the concentration of NO2 can be determined Ozone is added to excess NO in a dynamic calibration system and the NO channel of the chemiluminescence NO NO2 NOx analyzer is used as an indicator of changes in NO concentration When O3 is added the decrease in NO concentration observed on the calibrated NO channel is equivalent to the concentration of NO2 produced Adding variable amounts of ...

Page 126: ...in order to ease its scrubbing Oxidation can be accomplished by either ozonation or chemical contact During ozonation the air is passed through an ozone generator The O3 that is produced reacts with the NO to form NO2 Care must be taken to allow sufficient residence time for the ozonation reaction to go to completion Chemical oxidation is accomplished by passing the air stream through a reacting b...

Page 127: ...glass Teflon or other non reactive material The airflow controllers should be devices capable of maintaining constant airflows within 2 of the required flow rate The NO flow controller should be capable of maintaining constant NO flows within 2 of the required flow rate The pressure regulator for the standard NO cylinder must have a non reactive diaphragm and internal parts and a suitable delivery...

Page 128: ...ation standard and the method for calculating the NO concentration standard and the NO2 impurity A cylinder containing 10 to 50 ppm NO in N2 with less than 1 ppm NO2 is usually used as the concentration standard The cylinder must be traceable to a National Institute of Standards and Technology NIST NO in N2 Standard Reference Material or NO2 Standard Reference Material Procedures for certifying th...

Page 129: ... concentration NO NOM to calculate the diluted concentrations 3 Plot the analyzer NO response in ppm versus the nominal diluted NO concentration and determine the slope SNOM 4 Calculate the NO concentration of the working standard NO STD from S x NO NO NOM NOM STD 5 If the nominal NO concentration of the working standard is unknown generate several NO concentrations to give on scale NO responses 6...

Page 130: ...ion of the undiluted NO standard ppm FNO NO flow rate sccm FO O3 generator air flow rate sccm VRC Volume of the reaction chamber cc FT Analyzer demand plus 10 to 50 excess The O3 generator ozonator airflow rate and the NO flow rate must be adjusted such that the following relationships hold min ppm 2 75 t x NO P R RC R F F F NO NO NO O NO STD RC min 2 F F V t NO O RC R Use the following procedure ...

Page 131: ...lable reaction chamber volume Initially a trial volume may be selected in the range of 200 to 500 cc 5 Compute FO as F 2 75 V x F x NO F NO RC NO STD O 6 Compute tR as F F V t NO O RC R 7 Verify that tR 2 minutes If not select a reaction chamber with a smaller VRC 8 Compute the diluent air flow rate as F F F F NO O T D 9 If FO turns out to be impractical for the desired system select a reaction ch...

Page 132: ...pproximately the first minute of a span calibration or check should be disregarded because the span is mixing with the residual zero air 1 Allow the instrument to warm up and stabilize 2 Be sure the ozonator is ON If the ozonator is not ON a Press to display the Main Menu then choose Instrument Controls Ozonator b Press to toggle the ozonator ON c Press to return to the Run screen 3 Be sure the in...

Page 133: ...centrations Although the seven point curve is optional two of whatever number of points is chosen should be located at the zero and 90 levels and the remaining points equally spaced between these values Note When the instrument is equipped with internal zero span and sample valves the ZERO and SPAN ports should give identical responses to the SAMPLE port when test gases are introduced The user sho...

Page 134: ...ng the regulator from the cylinder between calibrations unless absolutely necessary 4 Connect the analyzer sample bulkhead input to the output of the GPT system Use the following procedure to adjust the instrument gain This includes Setting the Prereactor NO and NOx backgrounds to zero Calibrating the NO channel to the NO calibration gas Calibrating the NOx channel to the NOx calibration gas The P...

Page 135: ...liter min of sample flow and a total GPT airflow of at least 2 5 liters min is recommended a Allow the analyzer to sample zero air until the NO NOx and NO2 responses stabilize b After the responses have stabilized from the Main Menu choose Calibration Cal Prereactor Zero c Press to set the zero concentration reading to zero d Press to return to the Calibration menu and repeat this procedure to set...

Page 136: ...ave the new NO coefficient based on the entered span concentration The NO recorder response will equal Z 100 x URL NO scale esponse Recorder R NO OUT Where URL Nominal upper range limit of the NO channel ppm 4 Record the NO OUT concentration and the analyzer NO response as indicated by the recorder response Use the following procedure to calibrate the NOx channel to the NOx calibration gas 1 Press...

Page 137: ...NO scale esponse Recorder R NO OUT x x Where URL Nominal upper range limit of the NOx channel ppm 5 Record the NOx concentration and the analyzer s NOx response Use the following procedures to prepare the NO NOx and NO2 calibration curves 1 Generate several additional NO and NOx concentrations by decreasing FNO or increasing FD 2 For each concentration generated calculate the exact NO and NOx conc...

Page 138: ...analyzer responses stabilize record the resultant NO concentrations as NO REM 9 From the Main Menu choose Calibration Cal NO2 Coefficient The NO2 line of the Calibrate NO2 screen displays the current NO2 concentration The SPAN CONC line of the display is where you enter the NO2 calibration gas concentration 10 Set the NO2 calibration gas concentration to reflect the sum of the following the NO2 co...

Page 139: ...tion and the analyzer s NO2 response 13 Maintaining the same FNO FO and FD adjust the ozone generator to obtain several other concentrations of NO2 over the NO2 range at least five evenly spaced points across the remaining scale are suggested 14 Record the stable responses and plot the analyzer s NO2 responses versus the corresponding calculated using the above equation for NO2 OUT concentrations ...

Page 140: ...els are being introduced using separate tanks If more than one multi component cylinder is being used to calibrate the instrument Properly designed chemiluminescence analyzers are inherently linear over a wide dynamic range and under normal USEPA compliance situations this feature is not required Dual calibration may be used for span levels less than a factor of 10 apart however if this is done to...

Page 141: ...O Background or Cal NOx Background to set the NO and NOx backgrounds to zero Use the following procedure to calibrate NO channel to the NO calibration gas 1 Disconnect the source of zero air from the SAMPLE bulkhead In its place connect a source of NO calibration gas of about 80 of the low NO full scale range 2 Allow the analyzer to sample the low NO calibration gas until the NO NO2 and NOx readin...

Page 142: ...ment and decrement the numeric character at the cursor 3 Press to calculate and save the new low NOx coefficient based on the entered span concentration 4 Press to return to the Run screen Use the following procedure to calibrate the NO2 channel to the NO2 calibration gas 1 Adjust the O3 generator in the GPT system to generate sufficient O3 to produce a decrease in the low NO concentration equival...

Page 143: ...O field displays the current NO concentration The Hi NO Span Conc field is where you enter the high NO calibration gas concentration Use to move the cursor left and right and use to increment and decrement the numeric character at the cursor 3 Press to calculate and save the new high NO coefficient based on the entered span concentration Use the following procedure to calibrate the NOx channel to ...

Page 144: ...sed on the entered span concentration You can change the calibration factors by using the Calibration Factors menu This is often useful in a troubleshooting situation However after the above calibration procedure is completed all subsequent data reduction depends on the calibration parameters remaining the same as during the initial calibration Therefore never change any calibration factor without...

Page 145: ...o the ZERO bulkhead in a Model 42i Trace Level equipped with the zero span and sample solenoid valve option 2 Allow the instrument to sample zero gas until a stable reading is obtained on the NO NO2 and NOx channels then record the zero readings Unless the zero has changed by more than 0 010 ppm it is recommended that the zero not be adjusted If an adjustment larger than this is indicated due to a...

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Page 147: ...umn Replacement on page 5 2 Capillaries Inspection and Replacement on page 5 2 Thermoelectric Cooler Fins Inspection and Cleaning on page 5 4 Fan Filters Inspection and Cleaning on page 5 4 Pump Rebuilding on page 5 5 Read the safety precautions before beginning any procedures in this chapter WARNING If the equipment is operated in a manner not specified by the manufacturer the protection provided...

Page 148: ...tall the drying column to the DRY AIR bulkhead 4 Perform a Zero Span check see the Calibration chapter The capillaries normally only require inspection when instrument performance indicates that there may be a flow problem Equipment Damage Some internal components can be damaged by small amounts of static electricity A properly grounded antistatic wrist strap must be worn while handling any intern...

Page 149: ...llaries ferrule and O ring Inspect O ring for cuts or abrasion and replace as necessary 6 Check capillary for particulate deposits Clean or replace as necessary 7 Replace capillary in reaction chamber body making sure the O ring is around the capillary before inserting it into the body 8 Replace Cajon fitting Note that the Cajon fitting should be tightened slightly more than hand tight 9 Reconnect...

Page 150: ... instrument cover 3 Locate the PMT cooler Figure 7 2 and Figure 7 7 4 Blow off the cooler fins using clean pressurized air It may be more convenient to vacuum the cooler fins In either case make sure that any particulate accumulation between the fins has been removed 5 If necessary use a small brush to remove residual particulate accumulation 6 Replace the cover 7 Connect the power cord and turn t...

Page 151: ...cing chapter 1 Turn instrument off unplug the power cord and disconnect the pump plumbing from the instrument 2 Note the orientation of the pump head top plate for later reassembly Using a 3 mm Allen wrench remove the eight socket head screws and washers securing the pump head top plate 3 Discard the old Teflon gasket 4 Note the orientation of the diaphragm head for later reassembly Remove the dia...

Page 152: ...enance Pump Rebuilding 5 6 Model 42i Trace Level Instruction Manual Thermo Fisher Scientific Figure 5 2 Rebuilding the Pump 8 Remove the screw and nut securing the flapper valves and remove and discard old flapper valves ...

Page 153: ...traight 10 Align the diaphragm head correctly as noted in Step 2 and secure with the four socket head screws 11 Place the new Teflon gasket over the pump head so that the eight screws holes are aligned 12 Replace the top plate and secure with the eight screws and washers being sure that the Teflon gasket stays in place 13 Reconnect the plumbing to the instrument and plug in the pump power cord 14 ...

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Page 155: ...c can also be consulted in the event of problems See Service Locations on page 6 22 for contact information In any correspondence with the factory please note both the serial number and program number of the instrument This chapter provides the following troubleshooting and service support information Safety Precautions on page 6 1 Troubleshooting Guides on page 6 1 Board Level Connection Diagrams...

Page 156: ...t until faulty board is detected No output signal or very low output No sample gas reaching the analyzer Check input sample flow Ruptured pump diaphragm Rebuild pump head Blocked sample capillary Unplug power cord Clean or replace capillary No ozone reaching the reaction chamber Check the Instrument Control menu to see if the ozonator is ON If it is ON check dry air supply No output signal Disconn...

Page 157: ...ar response Incorrect calibration source Verify accuracy of multipoint calibration source gas Leak in sample probe line Check for variable dilution Excessive response time Partially blocked sample capillary Unplug power cord Clean or replace capillary Hang up blockage in sample filter Change element Improper converter operation Questionable calibration gas Verify accuracy Converter temperature too...

Page 158: ... foam filter Cooler reads 80 C Bad cooler Replace cooler Cooler does not hold set point of 3 C Replace cooler thermoelectric module inside cooler failed Cooler reads 20 C Replace cooler thermocouple bad Alarm Conv Temp Converter temperature low Molybdenum converter should be hot to the touch if not the heater may have failed Check that converter temp set point is approximately 325 C Check that vol...

Page 159: ...heck Instrument out of calibration Recalibrate instrument Alarm Zero Autocal Alarm Span Autocal Check gas supply Perform manual calibration Alarm NO NO2 NOx Conc Concentration has exceeded range limit Check to insure range corresponds with expected value If not select proper range Concentration low Check user defined low set point set to zero Alarm Motherboard Status Alarm Interface Status Alarm I...

Page 160: ... Diagrams 2 Pin P1 DIGITAL OUTPUTS 24V D C P O W E RSU P P LY MO THE RBO AR D D IG ITALO U TP U T BO AR D I OE XP ANSIO N BO AR D J14 J3 F R O NT P ANE L BO AR D J1 LCD DISPLAY KEY PANEL J18 J2 J4 J3 J1 J10 J17 PJ1 PJ3 PJ2 FRONT PANEL POWER SW 16 Pin 4 Pin 8 Pin 34 Pin 3 Pin 2 Pin 3 Pin 3 Pin 3 Pin PJ6 3 Pin IPJ8 3 Pin 8 Pin 11 Pin 2 Pin EXPANSION RS485 ANALOG OUTPUTS DIGITAL INPUTS P1 A P1 B RS23...

Page 161: ...SU R E 2 Pin C O O LE R 4 Pin 5 Pin SAMP LEFLO W TE MP C O NTR O L 6 Pin FAN1 2 Pin 2 Pin 2 Pin O ZO NATO R 2 Pin INPU TBO AR D 7 Pin P MTH VP S P MT 2 Cond 10 Pin 2 Cond Coax PMT ANODE MJ8 MJ10 PJ8 MJ3 MJ15 PJ9 MJ17 PJ4 PJ5 PJ1 OJ1 PJ10 PJ7 PJ11 J1 O ZFLO WSW 4 Pin 2 Pin HE ATE R 15V 1W O V E NTH E R M J2 MJ9 2 Pin SP AR E1SO L PJ12 PJ13 POJ3 POJ1 MJ14 2 Pin J2 J1 PE R MO VE N O P TIO NAL AC AC J...

Page 162: ...ector Pin Descriptions on page 6 18 Digital Output Board Connector Pin Descriptions on page 6 19 Input Board Connector Pin Descriptions on page 6 20 Temperature Control Board Connector Pin Descriptions on page 6 21 Table 6 3 Motherboard Connector Pin Descriptions Connector Label Reference Designator Pin Signal Description INTF DATA J1 1 Ground 2 RS485 to Interface Board 3 RS485 to Interface Board ...

Page 163: ... J2 1 5V 2 24V 3 24V 4 Ground 5 Ground 6 Ground 7 RS485 to Expansion Board 8 RS485 to Expansion Board SPARE DATA J12 1 5V 2 24V 3 24V 4 Ground 5 Ground 6 Ground 7 RS485 to Spare Board 8 RS485 to Spare Board I O J5 1 Power Fail Relay N C Contact 2 Ground 3 TTL Input 1 4 TTL Input 2 5 Ground 6 TTL Input 5 7 TTL Input 7 8 TTL Input 8 9 TTL Input 10 10 Ground 11 TTL Input 13 12 TTL Input 15 13 Ground ...

Page 164: ...9 Ground 20 Power Fail Relay COM 21 Power Fail Relay N O Contact 22 Ground 23 TTL Input 3 24 TTL Input 4 25 TTL Input 6 26 Ground 27 TTL Input 9 28 TTL Input 11 29 TTL Input 12 30 TTL Input 14 31 TTL Input 16 32 Ground 33 Analog Voltage 2 34 Analog Voltage 4 35 Ground 36 Analog Voltage 6 37 Ground SER EN J7 1 Serial Enable Jumper 2 3 3V 24V IN J10 1 24V 2 Ground DIGITAL I O J14 1 5V 2 24V 3 24V 4 ...

Page 165: ... Board Select 11 SPI Clock EXT RS485 J15 1 RS485 to Rear Panel 2 RS485 to Rear Panel 3 5V 4 5V 5 5V 6 Ground 7 Ground 8 Ground 9 NC 10 NC 11 24 12 24 13 24 14 24 15 24 24 MONITOR J17 1 24V Power Monitor 2 Ground FRONT PANEL BD J18 1 Ground 2 Ground 3 LCLK LCD Signal 4 Ground 5 Ground 6 LLP LCD Signal 7 LFLM LCD Signal 8 LD4 LCD Signal 9 LD0 LCD Signal 10 LD5 LCD Signal 11 LD1 LCD Signal 12 LD6 LCD...

Page 166: ...LCD Signal 21 Keypad Row 2 Input 22 Keypad Row 1 Input 23 Keypad Row 4 Input 24 Keypad Row 3 Input 25 Keypad Col 2 Select 26 Keypad Col 1 Select 27 Keypad Col 4 Select 28 Keypad Col 3 Select 29 Ground 30 Ground 31 Ground 32 Ground 33 24V 34 24V RS232 RS485 A P1 A 1 NC 2 Serial Port 1 RX RS485 IN 3 Serial Port 1 TX RS485 OUT 4 NC 5 Ground 6 NC 7 Serial Port 1 RTS RS485 OUT 8 Serial Port 1 CTS RS485...

Page 167: ...HOT 2 AC NEUT 3 AC Ground AC 24VPWR J1 1 AC HOT 2 AC NEUT 3 AC Ground AC INTF BD PJ3 1 AC HOT 2 AC NEUT 3 AC Ground Table 6 4 Measurement Interface Board Connector Pin Descriptions Connector Label Reference Designator Pin Signal Description DATA IPJ8 1 Ground 2 RS485 from Motherboard 3 RS485 from Motherboard PRES MJ3 1 Pressure Sensor Input 2 Ground 3 15V 4 15V INPUT BD MJ8 1 15V 2 Ground 3 15V 4 ...

Page 168: ...r Supply Voltage Adjust 2 Ground 3 HV Power Supply On Off 4 Ground 5 HV Power Supply Voltage Monitor 6 Ground 7 Ground FLOW SW MJ14 1 NC 2 Ground 3 Ozonator Flow OK Switch FLOW MJ15 1 Flow Sensor Input 2 Ground 3 15V 4 15V 5 Ground TEMP CTRL MJ17 1 Bench Temperature Input 2 Ground 3 15V 4 Converter Heater On Off 5 Converter Temperature Input 6 15V_PWR OZONATOR OJ1 1 Ozonator Output A 2 Ozonator Ou...

Page 169: ... 1 24V 2 Ground FAN 2 PJ5 1 24V 2 Ground AC IN PJ6 1 AC HOT 2 AC NEUT 3 AC Ground COOLER PJ7 1 Cooler Thermistor 2 Ground 3 15V_PWR 4 Cooler On Off Control AC TEMP PJ8 1 AC HOT 2 AC NEUT 3 AC Ground NO NOX SOL PJ9 1 24V 2 NO NOX Solenoid Control SAMPLE SOL PJ10 1 24V 2 Sample Solenoid Control Z S SOL PJ11 1 24V 2 Zero Span Solenoid Control SPARE1 SOL PJ12 1 24V 2 Spare 1 Solenoid Control SPARE2 SO...

Page 170: ...oard Connector Pin Diagram Connector Label Reference Designator Pin Signal Description MOTHER BOARD J1 1 Ground 2 Ground 3 LCLK LCD Signal 4 Ground 5 Ground 6 LLP LCD Signal 7 LFLM LCD Signal 8 LD4 LCD Signal 9 LD0 LCD Signal 10 LD5 LCD Signal 11 LD1 LCD Signal 12 LD6 LCD Signal 13 LD2 LCD Signal 14 LD7 LCD Signal 15 LD3 LCD Signal 16 LCD Bias Voltage 17 5V 18 Ground 19 Ground 20 LCD_ONOFF LCD Sig...

Page 171: ...Ground 32 Ground 33 24V 34 24V LCD DATA J2 1 LD0_5V LCD Signal 2 LD1_5V LCD Signal 3 LD2_5V LCD Signal 4 LD3_ONOFF_5V LCD Signal 5 LCD_ONOFF_5V LCD Signal 6 LFLM_5V LCD Signal 7 NC 8 LLP_5V LCD Signal 9 LCLK_5V LCD Signal 10 5V 11 Ground 12 25V 13 LCD Bias Voltage 14 Ground KEYBOARD J3 1 Keypad Row 1 Input 2 Keypad Row 2 Input 3 Keypad Row 3 Input 4 Keypad Row 4 Input 5 Keypad Col 1 Select 6 Keypa...

Page 172: ... 1 Analog Voltage Input 1 2 Analog Voltage Input 2 3 Analog Voltage Input 3 4 Ground 5 Analog Voltage Input 4 6 Analog Voltage Input 5 7 Analog Voltage Input 6 8 Ground 9 Analog Voltage Input 7 10 Analog Voltage Input 8 11 Ground 12 NC 13 NC 14 Ground 15 Current Output 1 16 Current Output Return 17 Current Output 2 18 Current Output Return 19 Current Output 3 20 Current Output Return 21 Current Ou...

Page 173: ...or Pin Descriptions Connector Label Reference Designator Pin Signal Description MOTHER BD J1 1 5V 2 24V 3 24V 4 Ground 5 Ground 6 Ground 7 SPI Reset 8 SPI Input 9 SPI Output 10 SPI Board Select 11 SPI Clock DIGITAL OUTPUTS J2 1 Relay 1 Contact a 2 Relay 2 Contact a 3 Relay 3 Contact a 4 Relay 4 Contact a 5 Relay 5 Contact a 6 Relay 6 Contact a 7 Relay 7 Contact a 8 Relay 8 Contact a 9 Relay 9 Cont...

Page 174: ...olenoid Drive Output 7 19 Solenoid Drive Output 8 20 Relay 1 Contact b 21 Relay 2 Contact b 22 Relay 3 Contact b 23 Relay 4 Contact b 24 Relay 5 Contact b 25 Relay 6 Contact b 26 Relay 7 Contact b 27 Relay 8 Contact b 28 Relay 9 Contact b 29 Relay 10 Contact b 30 24V 31 24V 32 24V 33 24V 34 24V 35 24V 36 24V 37 24V Table 6 8 Input Board Connector Pin Descriptions Connector Label Reference Designat...

Page 175: ...or Pin Descriptions Connector Label Reference Designator Pin Signal Description INTERFACE J1 1 Bench Temperature Input 2 Ground 3 15V 4 Converter Heater On Off 5 Converter Temperature Input 6 15V_PWR AC INPUT J2 1 AC HOT 2 AC NEUT BENCH J3 1 Bench Heater AC Output 2 Bench Heater AC Return 3 Ground 4 Bench Thermistor CONVERTER J4 1 Ground 2 Converter Heater AC Output 3 Converter Heater AC Return CO...

Page 176: ...cientific For additional assistance service is available from exclusive distributors worldwide Contact one of the phone numbers below for product support and technical information or visit us on the web at www thermo com aqi 1 866 282 0430 Toll Free 1 508 520 0430 International Service Locations ...

Page 177: ...istance see Service Locations at the end of this chapter This chapter includes the following parts information and component replacement procedures Safety Precautions on page 7 2 Firmware Updates on page 7 4 Accessing the Service Mode on page 7 4 Replacement Parts List on page 7 4 Cable List on page 7 6 External Device Connection Components on page 7 6 Removing the Measurement Bench and Lowering t...

Page 178: ...on page 7 35 Pressure Transducer Calibration on page 7 36 Temperature Control Board Replacement on page 7 38 Ambient Temperature Calibration on page 7 39 Fuse Replacement on page 7 40 Scrubber Replacement on page 7 40 I O Expansion Board Optional Replacement on page 7 41 Digital Output Board Replacement on page 7 43 Motherboard Replacement on page 7 43 Measurement Interface Board Replacement on pa...

Page 179: ...ent Figure 7 1 If an antistatic wrist strap is not available be sure to touch a grounded metal object before touching any internal components When the instrument is unplugged the chassis is not at earth ground Handle all printed circuit boards by the edges Do not point the photomultiplier tube at a light source This can permanently damage the tube Do not remove the LCD panel or frame from the LCD ...

Page 180: ...ain Menu press to scroll to Instrument Controls press to scroll to Service Mode and press The Service Mode screen appears 2 Press to toggle the Service Mode to ON 3 Press to return to the Main Menu 4 Return to the procedure Table 7 1 lists the replacement parts for the Model 42i Trace Level major subassemblies Refer to Figure 7 2 to identify the component location Table 7 1 Model 42i Trace Level R...

Page 181: ...MT High Voltage Power Supply 101324 00 PMT Base Socket Assembly 101390 00 Solenoid Valve 101020 00 Cooler Assembly 102648 01 Reaction Chamber Assembly 101009 00 NO2 to NO Converter Assembly Molybdenum 110VAC 9269 Molybdenum Converter Cartridge 9456 Pump 120VAC 60Hz 8079 Pump 110VAC 50Hz 9457 Pump 220VAC 50Hz 8500 Pump 220VAC 60Hz 8080 Pump 100VAC 50 60Hz 9464 Pump Repair Kit 101055 00 AC Receptacl...

Page 182: ...054 00 Motherboard to Front Panel Board 101035 00 DC Power Supply AC Input 101033 00 AC from Receptacle 101377 00 AC to Power Switch 101267 00 Fan Power Cable 101346 00 Temperature Control 101355 00 Signal Output Ribbon 101050 00 Heater Power 101055 00 Main AC Receptacle Assembly 102057 00 AC to External Pump Table 7 3 lists the standard and optional cables and components used for connecting exter...

Page 183: ...Part Number Description 102659 00 Cable DB25M to Open End Six Feet optional 6219 Cable RS 232 optional 102888 00 Terminal Board PCB Assembly DB37F standard with all instruments 102891 00 Terminal Board PCB Assembly DB37M standard with all instruments 103084 00 Terminal Board PCB Assembly DB25M standard with all instruments Figure 7 2 Component Layout Ozonator Solenoids 3 Motherboard Digital Output...

Page 184: ...e 7 3 Removing the Measurement Bench and Lowering the Partition Panel Equipment Required Philips screwdriver Equipment Damage Some internal components can be damaged by small amounts of static electricity A properly grounded antistatic wrist strap must be worn while handling any internal component 1 Turn instrument OFF and unplug the power cord Removing the Measurement Bench and Lowering the Parti...

Page 185: ... of the partition panel 9 While holding the case securely loosen the captive screw at the rear of the measurement bench and pull the measurement bench from the rear of the case 10 Remove the screw at the top rear of the partition panel securing the top of partition panel to the measurement bench and lower the panel being careful not to put excessive tension on the cables 11 Replace the measurement...

Page 186: ...previous steps in reverse Use the following procedures to replace the diaphragm and valve for the vacuum pumps Figure 7 5 Equipment Required Allen wrench 4 mm Nut driver 7 32 inch or 5 5 mm Allen wrench 3 mm Spanner wrench 3 8 mm diameter by 4 5 mm long inserts Small flat blade screwdriver Large flat blade screwdriver Cleaning agent alcohol Fine grade steel wool LOC TITE blue breakable thread adhe...

Page 187: ...3 Use the spanner wrench to loosen and remove the one piece clamping disc screw E Remove the old diaphragms from both heads G 4 Remove the four pan head screws with M5 washers J and remove the housing cover K from the front of the pump body If necessary carefully use a small flat bladed screwdriver to pry off the housing cover 5 Install the two PTFE white color diaphragms together with one TFM tra...

Page 188: ...ne full revolution to check for smooth operation 11 Re install the housing cover and check the pump for correct performance Use the following procedure to replace the valve 1 With the head off the pump unscrew the socket head cap screws with M4 lock washers S to remove the head lid T and gasket V 2 Loosen the single pan head screw washers and nut P and remove the two stainless steel reed valves Q ...

Page 189: ...ve over and reinstall 6 Match the holes of the PTFE head gasket V with the head seal surface install the head lid and tighten the two center bolts with M4 lock washers first and then cross alternate tightening of the perimeter bolts Re tighten the two center bolts after the other bolts are tight Figure 7 5 Vacuum Pump Head Plate and Motor View Valve Installation Diaphragm Installation ...

Page 190: ...f static electricity A properly grounded antistatic wrist strap must be worn while handling any internal component 1 Turn instrument OFF unplug the power cord and remove the cover 2 Remove the fan guard from the fan and remove the filter 3 Pull the power connectors off the fan 4 Remove the four fan mounting screws and remove the fan 5 Install a new fan following the previous steps in reverse Figur...

Page 191: ...s can be damaged by small amounts of static electricity A properly grounded antistatic wrist strap must be worn while handling any internal component 1 Refer to Removing the Measurement Bench and Lowering the Partition Panel in this chapter to lower the partition panel then proceed to the next step below 2 Disconnect the reaction chamber connector from the temperature control board 3 Snap off the ...

Page 192: ...oor plate and remove the cooler assembly with the reaction chamber Note If only the cooler is being replaced remove the PMT and reaction chamber from the old cooler and install them on the new cooler 8 Install new cooler by following previous steps in reverse Fasten knurled fittings on reaction chamber finger tight Make sure that the heat shrink covered tubing between the reaction chamber and the ...

Page 193: ...d by small amounts of static electricity A properly grounded antistatic wrist strap must be worn while handling any internal component 1 Turn instrument OFF unplug the power cord and remove the cover 2 Disconnect the high voltage cable from the PMT power supply and unplug the BNC cable from the Input Board 3 Remove six external screws holding PMT cover plate and the four screws holding the PMT shr...

Page 194: ...ge Adjustment in the Operation chapter Use the following procedure to replace the PMT high voltage power supply Figure 7 9 Equipment Required PMT high voltage power supply Nut driver 1 4 inch Philips screwdriver Equipment Damage Some internal components can be damaged by small amounts of static electricity A properly grounded antistatic wrist strap must be worn while handling any internal componen...

Page 195: ...se 7 Recalibrate the instrument Refer to the calibration procedures in the Calibration chapter Use the following procedure to adjust the PMT voltage after switching from standard to extended ranges or vice versa WARNING The service procedures in this manual are restricted to qualified service representatives 1 Select the NO NO2 and NOx ranges Refer to Range Menu in the Operation chapter PMT Voltag...

Page 196: ...rs Note If Service Mode is not displayed refer to Accessing the Service Mode on page then return to the beginning of this step 7 At the Set PMT Voltage screen use to increment decrement the counts until the instrument displays the calibration gas concentration value Use the following procedure to clean or remove the reaction chamber see Figure 7 10 Equipment Required Allen Wrench 9 64 inch Wrench ...

Page 197: ...ction chamber remove the three socket head screws holding it to cooler being careful to keep quartz window and red filter in cooler body 5 To reinstall reaction chamber follow previous steps in reverse making sure to backfill the cooler with dry air or nitrogen prior to installing reaction chamber 6 Re install the measurement bench Refer to Removing the Measurement Bench and Lowering the Partition...

Page 198: ...erature before handling converter components Equipment Damage Some internal components can be damaged by small amounts of static electricity A properly grounded antistatic wrist strap must be worn while handling any internal component 1 Turn instrument OFF unplug the power cord and remove the cover 2 Allow converter to cool to room temperature to prevent contact with heated components 3 Disconnect...

Page 199: ...der than necessary and remove the converter cartridge noting the proper orientation of heater wires and thermocouple probe 9 To replace converter follow previous steps in reverse Note Be sure to wrap the O3 converter tube snugly around the heater Use the following procedure to replace a solenoid valve Figure 7 12 Equipment Required Solenoid valve Wrench 5 16 inch Philips screwdriver Solenoid Valve...

Page 200: ...Partition Panel in this chapter to lower the partition panel then proceed to the next step below 2 Disconnect solenoid from the Measurement Interface board Note electrical connections to facilitate re connection 3 Remove plumbing from solenoid Note plumbing connections to facilitate re connection 4 Pull solenoid valve from mounting clip 5 To replace solenoid follow previous steps in reverse 6 Re i...

Page 201: ...properly grounded antistatic wrist strap must be worn while handling any internal component 1 Refer to Removing the Measurement Bench and Lowering the Partition Panel in this chapter to lower the partition panel then proceed to the next step below 2 Carefully disconnect the plumbing at the glass inlet and outlet of the ozonator 3 Disconnect the stainless steel tubing from the flow transducer 4 Loo...

Page 202: ...efer to Removing the Measurement Bench and Lowering the Partition Panel in this chapter Use the following procedure to replace the ozonator transformer Figure 7 13 Equipment Required Ozonator transformer Philips screwdriver Equipment Damage Some internal components can be damaged by small amounts of static electricity A properly grounded antistatic wrist strap must be worn while handling any inter...

Page 203: ... Use the following procedure to replace the input board Figure 7 14 Equipment Required Input board Philips screwdriver Equipment Damage Some internal components can be damaged by small amounts of static electricity A properly grounded antistatic wrist strap must be worn while handling any internal component 1 Refer to Removing the Measurement Bench and Lowering the Partition Panel in this chapter ...

Page 204: ...ing the Partition Panel in this chapter 8 Perform an input board calibration See the Input Board Calibration procedure that follows After replacing the input board use the following procedure to calibrate the input board WARNING The service procedures in this manual are restricted to qualified service representatives 1 From the Main Menu press to scroll to Service press to scroll to Input Board Ca...

Page 205: ...within 50 counts the value noted in the previous step 5 Press to store the value The screen flashes Calculating Please Wait and Done Values Saved messages Use the following procedure to replace the DC power supply Figure 7 15 Equipment Required DC power supply Philips screwdriver Equipment Damage Some internal components can be damaged by small amounts of static electricity A properly grounded ant...

Page 206: ...hould be tested if the concentration value on the front panel display disagrees with the analog outputs To check the analog outputs you connect a meter to an analog output channel voltage or current and compare the meter reading with the output value set on the Test Analog Outputs screen Equipment Required Multimeter Use the following procedure to test the analog outputs 1 Connect a meter to the c...

Page 207: ...responding to the rear panel terminal pins where the meter is connected and press The Set Analog Outputs screen appears 4 Press to set the output to zero The Output Set To line displays Zero 5 Check that the meter is displaying the zero value If the meter reading differs by more than one percent the analog outputs should be adjusted Refer to the Analog Output Calibration procedure that follows 6 P...

Page 208: ... Channels and Rear Panel Pin Connections Voltage Channel Pin Current Channel Pin 1 14 1 15 2 33 2 17 3 15 3 19 4 34 4 21 5 17 5 23 6 36 6 25 Ground 16 18 19 35 37 Current Output Return 16 18 20 22 24 Table 7 5 Analog Input Channels and Rear Panel Pin Connections Input Channel Pin 1 1 2 2 3 3 4 5 5 6 6 7 7 9 8 10 Ground 4 8 11 Use the following procedure to calibrate the analog outputs if a meter r...

Page 209: ...re the meter is connected then press 4 With the cursor at Calibrate Zero press The Analog Output Cal line displays Zero Note When calibrating the analog output always calibrate zero first and then calibrate full scale 5 Use until the meter reads 0 0V or 0 0 or 4 0 mA for a current channel then press to save the value 6 Press to return to the previous screen 7 Press to select Calibrate Full Scale 8...

Page 210: ...ted channel to zero volts The screen displays 0 00 V as the voltage setting 5 Press to return to the Analog Input Cal screen and repeat Steps 2 through 4 to calibrate other input channels to zero as necessary 6 Continue with the Calibrating the Input Channels to Full Scale procedure that follows Use the following procedure to calibrate the input channels to full scale by applying a known voltage t...

Page 211: ...display and repeat Steps 3 5 to calibrate other input channels to the source voltage as necessary Use the following procedure to replace the pressure transducer assembly Figure 7 17 Equipment Required Pressure transducer assembly Philips screwdriver Equipment Damage Some internal components can be damaged by small amounts of static electricity A properly grounded antistatic wrist strap must be wor...

Page 212: ...s steps in reverse 6 Calibrate the pressure transducer Refer to the Pressure Transducer Calibration procedure that follows Use the following procedure to calibrate the pressure transducer Equipment Required Vacuum pump WARNING The service procedures in this manual are restricted to qualified service representatives If the equipment is operated in a manner not specified by the manufacturer the prot...

Page 213: ...ever since these pressures are usually corrected to sea level it may be necessary to correct the reading to local pressure by subtracting 0 027 mm Hg per foot of altitude Do not try to calibrate the pressure transducer unless the pressure is known accurately 1 Remove the cover 2 Disconnect the tubing from the pressure transducer and connect a vacuum pump known to produce a vacuum less than 1 mm Hg...

Page 214: ...ture control board Figure 7 7 Equipment Required Temperature control board Small flat blade screwdriver Equipment Damage Some internal components can be damaged by small amounts of static electricity A properly grounded antistatic wrist strap must be worn while handling any internal component 1 Turn instrument OFF unplug the power cord and remove the cover 2 Disconnect all connectors from the temp...

Page 215: ...ic wrist strap must be worn while handling any internal component 1 Remove the instrument cover 2 Tape the thermistor plugged into the measurement interface board to a calibrated thermometer Figure 7 2 Note Since the thermistors are interchangeable to an accuracy of 0 2 C and have a value of 10K ohms at 25 C an alternate procedure is to connect an accurately known 10K resistor to the thermistor in...

Page 216: ...dels 250VAC 2 Amp SlowBlow for 220 240VAC models 1 Turn instrument OFF and unplug the power cord 2 Remove fuse drawer located on the AC power connector 3 If either fuse is blown replace both fuses 4 Insert fuse drawer and reconnect power cord Use the following procedure to replace the ammonia scrubber Figure 7 18 Equipment Required Ammonia scrubber Nut driver 3 16 inch Equipment Damage Some intern...

Page 217: ...e following procedure to replace the optional I O expansion board Figure 7 19 Equipment Required I O expansion board Nut driver 3 16 inch Equipment Damage Some internal components can be damaged by small amounts of static electricity A properly grounded antistatic wrist strap must be worn while handling any internal component 1 Turn instrument OFF unplug the power cord and remove the cover 2 Unplu...

Page 218: ...ounting studs and remove the board 5 To install the I O expansion board follow previous steps in reverse 6 Calibrate the analog current outputs and analog voltage inputs as defined earlier in this chapter Figure 7 19 Replacing the I O Expansion Board Optional Figure 7 20 Rear Panel Board Connectors Motherboard Support Bracket Mounting Studs Motherboard Digital Output Board I O Expansion Board Opt ...

Page 219: ... I O Expansion Board Replacement procedure in this chapter 3 Disconnect the digital output board ribbon cable from the motherboard 4 Using the nut driver remove the two standoffs securing the board to the rear panel Figure 7 20 5 Pop off the digital output board from the mounting studs and remove the board 6 To install the digital output board follow previous steps in reverse Use the following pro...

Page 220: ...ard support bracket and remove the motherboard 7 To install the motherboard follow previous steps in reverse 8 Calibrate the analog voltage outputs as defined earlier in this chapter all ranges Use the following procedure to replace the measurement interface board Figure 7 21 Equipment Required Measurement interface board Philips screwdriver Equipment Damage Some internal components can be damaged...

Page 221: ... bench 6 Calibrate the PMT voltage pressure transducer flow transducer input board and ambient temperature sensor as defined earlier in this chapter Figure 7 21 Replacing the Measurement Interface Board Use the following procedure to replace the flow transducer Figure 7 22 Equipment Required Flow transducer Equipment Damage Some internal components can be damaged by small amounts of static electri...

Page 222: ...Transducer 3 Disconnect the flow transducer cable from the measurement interface board 4 Loosen the two retaining nuts securing the flow transducer to the ozonator bracket and remove the flow transducer 5 To install the flow transducer follow previous steps in reverse 6 Calibrate the flow transducer Refer to the Flow Transducer Calibration procedure that follows Use the following procedure to cali...

Page 223: ...over 2 Disconnect the pump cable from AC PUMP connector on the measurement interface board 3 From the Main Menu press to scroll to Service press to scroll to Flow Calibration and press The Flow Sensor Cal menu appears Note If Service Mode is not displayed refer to Accessing the Service Mode on page 7 4 then return to the beginning of this step 4 At the Flow Sensor Cal menu press to select Zero The...

Page 224: ...ure 7 23 Equipment Required Front panel board Equipment Damage Some internal components can be damaged by small amounts of static electricity A properly grounded antistatic wrist strap must be worn while handling any internal component 1 Turn instrument OFF unplug the power cord and remove the cover 2 Remove the three ribbon cables and the two wire connector from the front panel board 3 Pop off th...

Page 225: ...skin or clothes If the liquid crystal contacts your skin or clothes wash it off immediately using soap and water Equipment Damage Some internal components can be damaged by small amounts of static electricity A properly grounded antistatic wrist strap must be worn while handling any internal component Do not remove the panel or frame from the module The polarizing plate is very fragile handle it c...

Page 226: ...odule 1 Turn instrument OFF unplug the power cord and remove the cover 2 Disconnect the ribbon cable and the two wire connector from the front panel board 3 Remove the four screws at the corners of the LCD module 4 Slide the LCD module out towards the right of the instrument 5 Replace the LCD module by following previous steps in reverse For additional assistance service is available from exclusiv...

Page 227: ...system electronics and input output connections and functions as follows Hardware on page 8 1 Software on page 8 4 Electronics on page 8 6 I O Components on page 8 9 Model 42i Trace Level hardware components Figure 8 1 include NO2 to NO converter Mode solenoid Reaction chamber Optical filter Pressure transducer Sample flow sensor Ozonator Ozone flow switch Photomultiplier tube Photomultiplier tube...

Page 228: ...yzer operation between the NO mode and NOx mode It routes the ambient air sample either through the reaction chamber NO mode or through the NO2 to NO converter and then to the reaction chamber NOx mode The reaction chamber is where the sample reacts with ozone and produces excited NO2 that gives off a photon of energy when it decays The reaction chamber is heated and controlled to approximately 50...

Page 229: ...trical circuit to the ozonator and shuts it off to prevent the ozonator from overheating The Photomultiplier tube PMT provides the infrared sensitivity required to detect the NO2 luminescence resulting from the reaction of the ozone with the ambient air sample Optical energy from the reaction is converted to an electrical signal by the PMT and sent to the input board that transmits it to the proce...

Page 230: ...ons between the low level processors and the high level processor Every tenth of a second the frequency counters analog I O and digital I O are read and written to by the low level processor The counters are accumulated over the past second and the analog inputs are averaged over that second The high level processor polls the low level processors once per second to exchange the measurement and con...

Page 231: ...rature are subtracted from their respective averages The NO reading is corrected by the stored span factor and by the temperature factor The NOx reading is partially corrected by the span factor temperature factor and balance factor The corrected NO value is subtracted from the partially corrected NOx value to yield an uncorrected NO2 value The NO2 value is then corrected for converter efficiency ...

Page 232: ...s on the rear panel and sends commands to the other boards to control the functions of the instrument and to collect measurement and diagnostic information The motherboard outputs instrument status and measurement data to the front panel mounted graphics display and to the rear panel I O The motherboard also contains I O circuitry and the associated connector to monitor external digital status lin...

Page 233: ...control board PMT high voltage supply Measurement input board Permeation oven option The flow sensor assembly consists of a board containing an instrumentation amplifier and a flow transducer with input and output gas fittings The flow transducer output is produced by measuring the pressure difference across a precision orifice This unit is used for measuring the flow of sample gas in the measurem...

Page 234: ...ts the current signal from the PMT and converts it to a voltage which is scaled by a factor of approximately 1 10 or 100 depending on the full scale range of the NO channel The scaled voltage signal is converted to a frequency and sent to the microprocessor The input board includes a test signal that can be activated under software control The test signal is injected at the first stage of the inpu...

Page 235: ...eneric bus that is capable of controlling the following devices Analog output voltage and current Analog input voltage Digital output TTL levels Digital input TTL levels The instrument has spare solenoid valve drivers and I O support for future expansion 5 Note The instrument has spare solenoid valve drivers and I O support for future expansion The instrument provides six analog voltage outputs Ea...

Page 236: ...ical equipment The user may assign a label unit and a voltage to user defined unit conversion table up to 16 points All voltage inputs have a resolution of 12 bits over the range of 0 to 10 volts The instrument includes one power fail relay on motherboard and ten digital output relays on the digital output board These are reed relays rated for at least 500 mA 200VDC The power fail relay is Form C ...

Page 237: ...ed C Link Modbus Slave Geysitech Bayern Hessen Streaming Data The Streaming Data protocol transmits user selected measurement data via the serial port in real time for capture by a serial printer data logger or PC A null modem crossed cable is required when connecting the analyzer to an IBM Compatible PC However a straight cable one to one may be required when connecting the analyzer to other remo...

Page 238: ...it 3 transmit 5 ground An RJ45 connector is used for the 10Mbs Ethernet connection supporting TCP IP communications via standard IPV4 addressing The IP address may be configured for static addressing or dynamic addressing set using a DHCP server Any serial port protocols may be accessed over Ethernet in addition to the serial port The external accessory connector is not used in the Model 42i analy...

Page 239: ...pan gas is connected to the SPAN port and a source of zero air is connected to the ZERO port Zero and span gas should be supplied at atmospheric pressure It may be necessary to use an atmospheric dump bypass plumbing arrangement to accomplish this For more information refer to the Installation chapter and the Operation chapter The permeation dryer minimizes routing maintenance procedures by provid...

Page 240: ...ent output channels 0 20 mA or 4 20 mA and eight analog voltage inputs 0 10V The DB25 connector on the rear panel provides the interface for these inputs and outputs The optional terminal block and cable kits provide a convenient way to connect devices to the instrument These kits break out the signals on the rear panel connector to individual numbered terminals Two types of terminal block and cab...

Page 241: ...es the color coding for both 25 pin cables and 37 pin cables Color codes for pins 1 25 are for 25 pin cables color codes for pins 1 37 are for 37 pin cables Table 9 1 Cable Options Description Cable Length DB37M to open end Six feet DB37F to open end Six feet DB25M to open end Six feet RS 232 Table 9 2 Color Codes for 25 Pin and 37 Pin Cables Pin Color Pin Color 1 BLACK 20 RED BLACK 2 BROWN 21 ORA...

Page 242: ...AY VIOLET 19 VIOLET WHITE 37 LIGHT GREEN BLACK The analyzer can be installed in the configuration described in Table 9 3 and shown in Figure 9 2 through Figure 9 5 Table 9 3 Mounting Options Mounting Type Description Bench Positioned on bench includes mounting feet and front panel side trim handles EIA rack Mounted in an EIA style rack includes mounting slides and front panel EIA rack mounting han...

Page 243: ...Optional Equipment Mounting Options Thermo Fisher Scientific Model 42i Trace Level Instruction Manual 9 5 Figure 9 2 Rack Mount Option Assembly ...

Page 244: ...Optional Equipment Mounting Options 9 6 Model 42i Trace Level Instruction Manual Thermo Fisher Scientific Figure 9 3 Bench Mounting ...

Page 245: ...Optional Equipment Mounting Options Thermo Fisher Scientific Model 42i Trace Level Instruction Manual 9 7 Figure 9 4 EIA Rack Mounting ...

Page 246: ...Optional Equipment Mounting Options 9 8 Model 42i Trace Level Instruction Manual Thermo Fisher Scientific Figure 9 5 Retrofit Rack Mounting ...

Page 247: ...Return Material Authorization RMA which may include biohazard decontamination procedures and other product specific handling instructions and c then if applicable Buyer may return the defective Products to Seller with all costs prepaid by Buyer Replacement parts may be new or refurbished at the election of Seller All replaced parts shall become the property of Seller Shipment to Buyer of repaired ...

Page 248: ...ll pay Seller therefor at Seller s then prevailing time and materials rates ANY INSTALLATION MAINTENANCE REPAIR SERVICE RELOCATION OR ALTERATION TO OR OF OR OTHER TAMPERING WITH THE PRODUCTS PERFORMED BY ANY PERSON OR ENTITY OTHER THAN SELLER WITHOUT SELLER S PRIOR WRITTEN APPROVAL OR ANY USE OF REPLACEMENT PARTS NOT SUPPLIED BY SELLER SHALL IMMEDIATELY VOID AND CANCEL ALL WARRANTIES WITH RESPECT ...

Page 249: ...bration on page B 25 Keys Display on page B 29 Measurement Configuration on page B 31 Hardware Configuration on page B 34 Communications Configuration on page B 38 I O Configuration on page B 42 Record Layout Definition on page B 46 Each command sent to the analyzer over the serial port must begin with the American Standard Code for Information Interchange ASCII symbol or byte value equivalent of ...

Page 250: ...message will be received The example below sends the incorrect command set unit ppm instead of the correct command set gas unit ppb Send set unit ppb Receive set unit ppb bad cmd The save and set save params commands stores parameters in FLASH It is important that each time instrument parameters are changed that this command be sent If changes are not saved they will be lost in the event of a powe...

Page 251: ...on alarm minimum value B 14 alarm converter temp max Reports sets NO2 converter temperature alarm maximum value B 14 alarm converter temp min Reports sets NO2 converter temperature alarm minimum value B 14 alarm cooler temp max Reports sets PMT cooler temperature alarm maximum value B 15 alarm cooler temp min Reports sets PMT cooler temperature alarm minimum value B 15 alarm internal temp max Repo...

Page 252: ...o bkg Sets auto calibrates NO background B 25 cal no coef Sets auto calibrates NO coefficient B 26 cal no2 coef Sets auto calibrates NO2 coefficient B 26 cal nox bkg Sets auto calibrates NOx background B 25 cal nox coef Sets auto calibrates NOx coefficient B 26 cal pre bkg Sets auto calibrates prereactor background B 25 cal pres Sets current measured pressure as pressure during calibration for pre...

Page 253: ...rd B 17 dig in Reports status of the digital inputs B 43 din Reports sets digital input channel and active state B 43 do down Simulates pressing down pushbutton B 29 dout Reports sets digital output channel and active state B 44 dtoa Reports outputs of the digital to analog converters per channel B 44 en enter Simulates pressing enter pushbutton B 29 er Returns a brief description of the main oper...

Page 254: ...range no2 Reports selects current NO2 high range B 31 high range nox Reports selects current NOx high range B 31 host name Reports sets host name string B 40 instr name Reports instrument name B 40 instrument id Reports sets instrument id B 40 internal temp Reports current internal instrument temperature B 11 isc iscreen Retrieves framebuffer data used for the display B 29 layout ack Disables stal...

Page 255: ...current NO2 low range B 31 low range nox Reports sets current NOx low range B 31 lr Outputs long records in the format specified in the command B 19 lrec Outputs long records B 20 lrec format Reports sets output format for long records ASCII or binary B 21 lrec layout Reports current layout of lrec data B 22 lrec mem size Reports maximum number of long records that can be stored B 22 lrec per Repo...

Page 256: ...Reports current prereactor concentration B 10 pre bkg Reports sets current prereactor background B 28 pres Reports current reaction chamber pressure B 12 pres cal Reports sets pressure used for calibration B 28 pres comp Reports sets pressure compensation on or off B 34 program no Reports analyzer program number B 41 push Simulates pressing a key on the front panel B 29 range mode Reports sets cur...

Page 257: ... srec per Reports sets short record logging period B 23 stream per Reports sets current set time interval for streaming data B 25 stream time Reports sets a time stamp to streaming data or not B 25 temp comp Reports sets temperature compensation on or off B 34 time Reports sets current time 24 hour time B 37 up Simulates pressing up pushbutton B 29 zero Sets zero span valves to zero mode B 33 zero...

Page 258: ...vg time 9 Receive set low avg time 9 ok Table B 2 Averaging Times Selection Time NO Measure Mode NOx Measure Mode Time NO NOx Measure Mode 0 1 seconds 1 1 2 2 3 5 4 10 10 seconds 5 20 20 6 30 30 7 60 60 8 90 90 9 120 120 10 180 180 11 240 240 12 300 300 Manual mode only no no2 nox pre high no high no2 high nox high pre low no low no2 low nox low pre These commands report the measured NO NO2 NOx an...

Page 259: ...sured flow The example below reports that the flow measurement is 0 700 liters minute Send flow Receive flow 0 7 1 m internal temp This command reports the current internal instrument temperature The first reading is the temperature being used in instrument calculations The second temperature is the actual temperature being measured If temperature compensation is on then both temperature readings ...

Page 260: ...h the actual pressure is 306 3 mmHg The example below shows that the actual reaction chamber pressure is 306 3 mmHg Send pres Receive pres 753 4 mm Hg actual 306 6 react temp This command reports the current reaction chamber temperature The example below reports that the current reaction temperature is 49 0 C Send react temp Receive react temp 49 0 deg C flags This reports 8 hexadecimal digits or ...

Page 261: ...re alarm minimum value is 47 0 C Send alarm chamber temp min Receive alarm chamber temp min 47 0 deg C set alarm chamber temp min value set alarm chamber temp max value These commands set the chamber temperature alarm minimum and maximum values to value where value is a floating point number representing chamber temperature alarm limits in degrees C The example below sets the chamber temperature a...

Page 262: ... concentration alarm minimum and maximum values to value where value is a floating point representation of the concentration alarm limits Values must be in the units that are currently set for use The example below sets the NO concentration alarm maximum value to 115 Send set alarm conc no max 115 Receive set alarm conc no max 115 ok alarm converter temp min alarm converter temp max These commands...

Page 263: ...2 0 C Send set alarm cooler temp max 2 0 Receive set alarm cooler temp max 2 0 ok alarm internal temp min alarm internal temp max These commands report the internal temperature alarm minimum and maximum value current settings The example below reports that the internal temperature alarm minimum value is 15 0 C Send internal temp alarm min Receive internal temp alarm min 15 0 deg C set internal tem...

Page 264: ... Send alarm sample flow min Receive alarm sample flow min 0 3 l min set alarm sample flow min value set alarm sample flow max value These commands set the sample flow alarm minimum and maximum values to value where value is a floating point number representing sample flow alarm limits in liters per minute The example below sets the sample flow alarm maximum value to 2 LPM Send set alarm sample flo...

Page 265: ...lue is separated by a space Send diag volt mb Receive diag volt mb 24 1 14 9 4 9 3 2 3 2 diag volt mib This command reports the diagnostic voltage measurements on the measurement interface board The sequence of voltages is Positive 24 positive 15 negative 15 positive 5 positive 3 3 positive 18 IR positive 18 MOT and VBIAS Each voltage value is separated by a space Send diag volt mib Receive diag v...

Page 266: ...rec min set data treatment lrec string set data treatment srec string string cur avg min max These commands set the data treatment to current average minimum or maximum for the concentration values recorded in the long records lrecs or short records srecs The example below sets the data treatment for concentrations in lrec to minimum Send set data treatment lrec min Receive set data treatment lrec...

Page 267: ...and These commands report the last long and short records stored or the dynamic data record In the example below the command requests a long record with no checksum in ASCII format with text For details on how to decode the flag fields within these records see the flags command Send lr01 Receive lr01 12 31 02 22 03 flags 54089100 no 8413E 1 nox 8485E 1 lono 6471E 1 lonox 6527E 1 pres 130 9 pmtt 53...

Page 268: ... 59 oo month 01 to 12 pp day 01 to 31 qq year These commands output long or short records and dynamic data The output format is determined by the set lrec format and set srec format commands The logging time is determined by the set lrec per and set srec per commands In dual range the long records and short records contain the high and low NO and NOx concentrations In single range the low NO and l...

Page 269: ...x 8483E 1 lono 6486E 1 lonox 6525E 1 pres 133 0 pmtt 53 0 intt 80 0 rctt 80 0 convt 61 smplf 0 500 ozonf 0 000 pmtv 116 11 07 02 22 03 flags 54089100 no 8442E 1 nox 8383E 1 lono 6494E 1 lonox 6449E 1 pres 131 5 pmtt 53 1 intt 80 0 rctt 80 0 convt 61 smplf 0 500 ozonf 0 000 pmtv 116 where pmtv PMT Voltage pmtt PMT Temperature intt Internal Temperature rctt Reaction Chamber Temperature convt NO2 Con...

Page 270: ... lrec srec and related commands For details on how to interpret the strings see Record Layout Definition later in this appendix Send lrec layout Receive lrec layout s s lx f f f f f f f f f f f f t D L ffffffffffff flags no nox hino hinox pres pmtt intt rctt convt smplf ozonf pmtv lrec mem size srec mem size These commands report the long and short records that can be stored with the current setti...

Page 271: ... number of long and short records stored in the long and short records memory The example below shows that 50 long records have been stored in the memory Send no of lrec Receive no of lrec 50 recs malloc lrec malloc srec These commands report the currently set memory allocation for long and short records in percent of total memory Send malloc lrec Receive malloc lrec 10 set malloc lrec value set m...

Page 272: ...t of long records into the scratch pad Send set copy lrec to sp Receive set copy lrec to sp ok sp field number This command reports the variable number and name stored at index in the scratch pad list The example below shows that the field 5 in the scratch pad is set to index number 13 which is for the variable pressure Send sp field 5 Receive sp field 5 13 pres set sp field number value number 1 ...

Page 273: ...ream per 10 ok stream time This command reports if the streaming data string will have a time stamp attached to it or not according to Table B 5 Send stream time Receive stream time 0 set stream time value This command enables value where value is to attach or disable time stamp to streaming data string according to Table B 5 The example below attaches a time stamp to streaming data Send set strea...

Page 274: ...commands are only available in dual and auto range mode If the mode is incorrect the instrument responds with can t wrong settings The example below shows a successful auto calibration of the low NO coefficient Send set cal low no coef Receive set cal low no coef ok no coef no2 coef nox coef high no coef high no2 coef high nox coef low no coef low no2 coef low nox coef These commands report NO NO2...

Page 275: ...x coefficients The high and low commands are only available in dual and auto range mode If the mode is incorrect the instrument responds with can t wrong settings The example below reports that the NO low span gas concentration is 240 0 ppb Send low no gas Receive low no gas 2400E 1 ppb set no gas value set no2 gas value set nox gas value set high no gas value set high no2 gas value set high nox g...

Page 276: ...floating point representation of the background in current selected units The example below sets the NO background to 5 5 ppb Send set no bkg 5 5 Receive set no bkg 5 5 ok pres cal This command reports the pressure recorded at the time of calibration The example below shows that the pressure at calibration is 85 5 mmHg Send pres cal Receive pres cal 85 5 mmHg set pres cal This command automaticall...

Page 277: ...mbers represent the front panel soft keys from left to right Send push enter Receive push enter ok isc iscreen This command retrieves the framebuffer data used for the display on the iSeries instrument It is 19200 bytes in size 2 bits per pixel 4 pixels per byte arranged as 320 by 240 characters The data is sent in RLE encoded form to save time in transmission It is sent as a type 5 binary C Link ...

Page 278: ...d char rlecount unsigned char rlescreen i while rlecount ptr 0 rlecount else if rlescreen i 0xff unsigned char rlecount unsigned char rlescreen i while rlecount ptr 0xff rlecount To convert this data into a BMP for use with windows it needs to be turned into a 4BPP as that is the smallest windows can display Also note that BMP files are upside down relative to this data i e the top display line is...

Page 279: ...n dual or auto range mode If the mode is incorrect the instrument responds with can t wrong settings The example below reports that the NO full scale range is set to 50 ppb according to Table B 6 Send range no Receive range no 6 5000E 2 ppm set range Selection set high range Selection set low range Selection These commands select the NO NO2 and NOx full scale ranges according to Table B 6 The exam...

Page 280: ...hese commands are used to set the maximum concentration for any of the three custom ranges 1 2 or 3 to range value where value is a floating point number representing concentration in ppb or μg m3 The example below sets the custom 1 range to 55 5 ppb Send set custom 1 range 55 5 Receive set custom 1 range 55 5 ok range mode This command reports the current range mode Send range mode Receive range ...

Page 281: ...e example below sets the instrument to zero mode that is the instrument is reading the sample gas Send set zero Receive set zero ok set span set span gas These commands set the zero span valves to the span mode The example below sets the instrument to span mode that is the instrument is sampling span gas Send set span Receive set span ok gas unit This command reports the current gas units ppb or μ...

Page 282: ...ssure compensation is on or off The example below shows that pressure compensation is on Send pres comp Receive pres comp on set pres comp onoff These commands turn the pressure compensation on or off The example below turns pressure compensation off Send set pres comp off Receive set pres comp off ok temp comp This command reports whether temperature compensation is on or off The example below sh...

Page 283: ...30 4 40 5 50 6 60 7 70 8 80 9 90 10 100 conv set temp This command reports the temperature that the NO2 converter is set to The example below reports that the converter temperature is set to 325 C Send conv set temp Receive conv set temp 325 deg C set conv set temp value This command sets the temperature that the NO2 converter is set to where value is an integer representing dwgrees C The example ...

Page 284: ...efault params Receive set default params ok ozonator This command reports the ozonator is on or off The example below reports that the ozonator is on Send ozonator Receive ozonator on set ozonator onoff These commands set the ozonator on or off The example below sets the ozonator off Send set ozonator off Receive set ozonator off ok ozonator flow This command reports the current ozonator flow The ...

Page 285: ...the PMT on or off The example below reports that the PMT is on Send pmt status Receive pmt status on set pmt onoff These commands set the PMT on or off The example below turns the PMT off Send set pmt off Receive set pmt off ok save set save params This command stores all current parameters in FLASH memory It is important that each time instrument parameters are changed that this command be sent I...

Page 286: ...ddress where address consists of four numbers ranging from 0 255 inclusive separated by Send set addr dns 192 168 1 1 Receive set addr dns 192 168 1 1 ok addr gw This command reports the default TCP IP gateway address Send addr gw Receive addr gw 192 168 1 1 set addr gw address This command sets the default gateway address where address consists of four numbers ranging from 0 255 inclusive separat...

Page 287: ...e current baud rate is 9600 baud Send baud Receive baud 9600 set baud rate rate 1200 2400 4800 9600 19200 38400 57600 115200 This command sets the instrument baud rate The example below sets the instrument s baud rate to 9600 Note After the command is sent the baud rate of the sending device must be changed to agree with the instrument Send set baud 9600 Receive set baud 9600 ok dhcp This command ...

Page 288: ...his command sets the reply termination format where format is set according to Table B 8 The example below sets the reply termination format to checksum Send set format 01 Receive set format 01 ok Table B 8 Reply Termination Formats Format Reply Termination 00 CR 01 NL sum xxxx CR where xxxx 4 hexadecimal digits that represent the sum of all the characters bytes in the message host name This comma...

Page 289: ...nt id 50 Receive set instrument id 50 ok mode This command reports what operating mode the instrument is in local service or remote The example below shows that the instrument is in the remote mode Send mode Receive mode remote set mode local set mode remote These commands set the instrument to local or remote mode The example below sets the instrument to the local mode Send set mode local Receive...

Page 290: ...xample below sets current output channel 4 to the 0 20 mA range This command responds with feature not enabled if the I O expansion board is not detected Send set analog iout range 4 1 Receive set analog iout range 4 1 ok Table B 9 Analog Current Output Range Values Range Output Range 1 0 20 mA 2 4 20 mA 0 cannot be set to this but may report Undefined analog vin channel This command retrieves the...

Page 291: ...eports the status of the digital inputs as a 4 digit hexadecimal string with the most significant bit MSB being input 16 Send dig in Receive dig in 0xff7f din channel This command reports the action assigned to input channel and the corresponding active state The example below reports the input 1 to be assigned an index number 3 corresponding to action of set background mode with the active state ...

Page 292: ...og converters according to Table B 11 The example below shows that the D A 1 is 97 7 full scale Send dtoa 1 Receive dtoa 1 97 7 Note If the instrument is in a mode which does not provide a particular output and that output is selected the value will be 0 0 All channel ranges are user definable If any customization has been made to the analog output configuration the default selections may not appl...

Page 293: ...al output and digital inputs The index number is used to insert the variable in a field location in a list using set sp field index The example below reports the list of analog output index numbers and variables Send list var aout Receive list var aout index variable 0 none 1 no 2 no2 3 nox 18 intt 19 rctt 20 pmtt 21 convt 25 pres 26 smplf 27 pmtv 28 ain1 29 ain2 30 ain3 31 ain4 32 ain5 33 ain6 34...

Page 294: ... command is sent without an appended relay number then all the relays are assigned the set logic of normally open closed Send set relay open 1 Receive set relay open 1 ok The Erec Lrec Srec layouts contain the following A format specifier for parsing ASCII responses A format specifier for parsing binary responses In addition to these the Erec Layout contains A format specifier for producing the fr...

Page 295: ...rated by spaces and the line is terminated by a n Valid fields are t parse a time specifier 2 bytes D parse a date specifier 3 bytes i ignore one 8 bit character 1 byte e parse a 24 bit floating point number 3 bytes n x E parse a 24 bit floating point number 3 bytes N x f parse a 32 bit floating point number 4 bytes c parse an 8 bit signed number 1 byte C parse an 8 bit unsigned number 1 byte n pa...

Page 296: ... followed by a possible string enclosed in quotes that is used to place a string into the value field The value source which is the item or word number in the DATA ERec response appears next This is followed by an optional bitfield designator The datum identified by the value source can be printed as a string s hexadecimal x decimal d or floating point f or binary b number Typically bitfield extra...

Page 297: ...ay be displayed Then there appears an optional button designator This will be one of B I L T or N B Indicates a button which pops up an input dialog prompting the user for a new value using the designated input format The input format is specified from the B through the subsequent semicolon I Indicates a button which pops up a selection list with input translation That is the values read are trans...

Page 298: ...ld is also NO but the value is taken from the eighteenth element of the data response again interpreted as a string A button appears on this line which when pressed pops up an input dialog which will state Please enter a new value for NO using a d ddd format The string entered by the user is used to construct the output command If the user enters for example 1 234 the constructed command will be s...

Page 299: ...eroth value appearing first 0 local 1 remote etc The selection list shows that only the first two values in this case are to be shown to the user when the button is pressed The T button indicates full translation input code to string and user selection number to output string xC This is a line that starts a new column the xC or L Comp 6 11x off on Tset temp comp s n This shows that the bitfield en...

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Page 301: ...nstrument This is achieved by using the supported MODBUS commands listed below For details of the Model 42i Trace Level MODBUS Protocol specification see the following topics Serial Communication Parameters on page C 1 TCP Communication Parameters on page C 2 Application Data Unit Definition on page C 2 Function Codes on page C 3 MODBUS Parameters Supported on page C 8 Additional information on th...

Page 302: ...een 1 and 127 decimal i e 0x01 hex to 0x7F hex This address is only used for MODBUS RTU over serial connections Note Device ID 0 used for broadcast MODBUS commands is not supported Device IDs 128 through 247 i e 0x80 hex to 0xF7 hex are not supported because of limitations imposed by C Link In MODBUS over TCP IP a MODBUS Application Protocol Header MBAP is used to identify the message This header ...

Page 303: ...on the function For more description of these data fields see Function Codes below In MODBUS over Serial an error check is included in the message This is not necessary in MODBUS over TCP IP because the higher level protocols ensure error free transmission The error check is a two byte 16 bit CRC value This section describes the various function codes that are supported by the Model 42i Trace Leve...

Page 304: ...ies the quantity of complete bytes of data Note The values reported may not reflect the state of the actual relays in the instrument as the user may program these outputs for either active closed or open Request Function code 1 Byte 0x01 or 0x02 Starting Address 2 Bytes 0x0000 to maximum allowed by instrument Quantity of outputs 2 Bytes 1 to maximum allowed by instrument Unit Identifier 1 Byte 0x0...

Page 305: ...e left and output 11 is the LSB of this byte The four remaining high order bits are zero filled Read holding input registers reads the measurement data from the instrument Issuing either of these function codes will generate the same response These functions read the contents of one or more contiguous registers These registers are 16 bits each and are organized as shown below All of the values are...

Page 306: ...er value N x 2 Bytes N N or N 1 N Quantity of Registers Error Response Function code 1 Byte Function code 0x80 Exception code 1 Byte 01 Illegal Function 02 Illegal Address 03 Illegal Data 04 Slave Device Failure Here is an example of a request and response to read registers 10 13 Request Field Name Hex Function 0x03 Starting Address Hi 0x00 Starting Address Lo 0x09 No of Registers Hi 0x00 No of Re...

Page 307: ...d Actions are addressed starting at zero Therefore action number 1 is addressed as 0 The requested ON OFF state is specified by a constant in the request data field A value of 0xFF00 requests the action to be ON A value of 0x0000 requests it to be OFF All other values are illegal and will not affect the output The normal response is an echo of the request returned after the state has been written ...

Page 308: ...ue Lo 00 Response Field Name Hex Function 05 Output Address Hi 00 Output Address Lo 05 Output Value Hi FF Output Value Lo 00 The following Table C 1 through Table C 3 lists the MODBUS parameters supported for the Model 42i Trace Level Table C 1 Read Coils for 42i Trace Level Coil Number Status 1 AUTORANGE NOx 2 LOCAL REMOTE 3 SERVICE 4 UNITS 5 ZERO MODE 6 SPAN MODE 7 NO MODE 8 NOx MODE 9 NOT USED ...

Page 309: ...T USED 22 INT TEMP ALARM 23 CHAMB TEMP ALARM 24 COOLER TEMP ALARM 25 NO2 CONVERTER TEMP ALARM 26 NOT USED 27 PERM OVEN GAS TEMP ALARM 28 PRESSURE ALARM 29 FLOW ALARM 30 OZONE FLOW ALARM 31 MOTHERBOARD STATUS ALARM 32 INTERFACE BD STATUS ALARM 33 I O EXP BD STATUS ALARM 34 NOT USED 35 CONC ALARM 36 SAMPLE MODE 37 PURGE MODE 38 NOT USED 39 ZERO CHECK CAL ALARM 40 SPAN CHECK CAL ALARM Table C 2 Read ...

Page 310: ...28 NOT USED 40029 40030 NOT USED 40031 40032 RANGE NOx 40033 40034 NOT USED 40035 40036 INTERNAL TEMPERATURE 40037 40038 CHAMBER TEMPERATURE 40039 40040 COOLER TEMPERATURE 40041 40042 NO2 CONVERTER TEMP 40043 40044 NOT USED 40045 40046 PERM OVEN GAS 40047 40048 PERM OVEN HEATER 40049 40050 CHAMBER PRESSURE 40051 40052 SAMPLE FLOW 40053 40054 PMT VOLTS 40055 40056 ANALOG IN 1 40057 40058 ANALOG IN ...

Page 311: ... LOW NO CORRECTION CONC 40091 40092 LOW NO2 CORRECTION CONC 40093 40094 LOW NOx CORRECTION CONC 40095 40096 NOT USED 40097 40098 NOT USED 40099 40100 HIGH NO CORRECTION CONC 40101 40102 HIGH NO2 CORRECTION CONC 40103 40104 HIGH NOx CORRECTION CONC 40105 40106 NOT USED 40107 40108 NOT USED If O2 Correction Option is installed Table C 3 Write Coils for 42i Trace Level Coil Number Action Triggered 10...

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Page 313: ...mple zero span mode if valid for that instrument This is achieved by using the supported Geysitech commands listed below For details of the Model 42i Trace Level Geysitech Protocol specification see the following topics Serial Communication Parameters on page D 1 TCP Communication Parameters on page D 2 Instrument Address on page D 2 Abbreviations Used on page D 2 Basic Command Structure on page D...

Page 314: ...ddress is represented by address in the examples throughout this document Note Device IDs 128 through 247 are not supported because of limitations imposed by the C Link protocol The following is a list of abbreviations used in this document CR is abbreviation for Carriage Return ASCII code 0x0D STX is abbreviation for Start of Text ASCII code 0x02 ETX is abbreviation for End of Text ASCII code 0x0...

Page 315: ...by the two characters A B The checksum is referred to as BCC throughout this document The following commands are supported by the Geysitech protocol Instrument Control Command ST Data Sampling Data Query Command DA There are three control commands supported by the Geysitech protocol This control command is a single letter which triggers an action in the instrument These commands are active only wh...

Page 316: ...response to DA command below The command structure for a data query command is as follows STX DA address ETX BCC The address is optional which means it can be left out completely The address if present must match the Instrument Address Additional space can be present after the address If the address is left out then no space is allowed in the query string A command with no address is also a valid ...

Page 317: ...to the response will have the address X where X keeps incrementing by 1 for each measurement included measured value is the concentration value in currently selected gas units represented as exponential representation with 4 characters mantissa and 2 characters exponent each with sign Mantissa sign and 4 digits The decimal point is assumed to be after the first digit and is not transmitted Exponen...

Page 318: ...1 SP 03 SP 04 SP Second Concentration 5 681 Address 2 Third Concentration 11 75 0000000000 SP CR The attached concentrations are in the selected gas units The measurements that are attached to the response if not valid in a particular mode then a value of 0 0 will be reported The following measurements reported in response to DA command are for the Model 42i Trace Level The 4 measurements reported...

Page 319: ...e Local 0 0 0 0 0 0 1 0 Zero gas On 0 0 0 0 0 1 0 0 Span gas On 0 0 0 0 1 0 0 0 Gas Unit Indication ppm OR ppb 0 0 0 1 0 0 0 0 Ozonator Off 0 0 1 0 0 0 0 0 PMT Off 0 1 0 0 0 0 0 0 Not used 1 0 0 0 0 0 0 0 Table D 2 Error Status for Model 42i Trace Level D7 D6 D5 D4 D3 D2 D1 D0 Æ Bit 8 7 6 5 4 3 2 1 Æ Hex value 80 40 20 10 08 04 02 01 MSB LSB Error status Not Used 0 0 0 0 0 0 0 1 Not Used 0 0 0 0 0...

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Page 321: ... normally done using firs a zero gas then a span gas generated by dilution of a calibration gas cylinder Dilution is done by dynamic mixing of accurately known flows of span gas and zero gas For Trace Level analyzers mass flow controllers that are NIST traceable are required Nitric oxide and sulfur dioxide calibration standards between 1 and 10 ppm are readily available in specially treated cylind...

Page 322: ...psig is dried by passing the air through a heatless air dryer for example and then sent through a series of chemical reactors and or scrubbers Normally these include indicating silica gel Purafil activated charcoal and a fine 5 micron particulate filter When first used this brute force approach actually can generate enhanced impurity levels for Nox and SO2 as these gases desorb from the chemical r...

Page 323: ... United States Environmental Agency Tennessee Valley Authority Battelle National Labs and THERMO FISHER SCIENTIFIC s Engineering Department have demonstrated that Trace Level analyzers are readily calibrated at the low concentration levels require for sub ambient monitoring Although extra care is required primarily in zero air generation users familiar with normal compliance requirements should be...

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