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Servicing

Front Panel Board Replacement

Thermo Electron Corporation

Model 42

Low Source Instruction Manual

7-45

Front Panel Board

Replacement

Use the following procedure to replace the front panel board (

Figure 7-23

Equipment Required:

•

Front panel board

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 the board from the two top mounting studs and remove the

board by lifting it up and off the slotted bottom support.

4. Replace the front panel board by following previous steps in reverse.

Figure 7-23.

Replacing the Front Panel Board and the LCD Module

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.

Ribbon Cables (3)

Two-Wire Connector

Mounting Studs (2)

Bottom Support

LCD Module Screws (2)

Front Panel Board

LCD Module

Retaining Screw

Summary of Contents for 42i

Page 1: ...Model 42i Low Source Instruction Manual Chemiluminescence NO NO2 NOx Analyzer Part number 102031 00 30May2006 ...

Page 2: ... is a trademark of Thermo Electron Corporation All other product names and logos are the property of their respective owner Specifications terms and pricing are subject to change Not all products are available in all countries Please consult your local sales representative for details ...

Page 3: ...hermo Electron 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 Electron s compliance with these Directives the recyclers in your country and information on Thermo Electron products which may assist the detection of substances subject to the RoHS Directive are available...

Page 4: ...WEEE Compliance WEEE Compliance Thermo Electron Corporation ...

Page 5: ...t Keys 3 4 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 10 Auto Range Mode 3 11 Gas Units 3 14 NO NO2 and NOx Ranges 3 14 Set Custom Ranges 3 16 Averaging Time 3 17 Calibration Factors Menu 3 18 NO and NOx Backgrounds 3 19 NO NO2 and NOx Coefficients 3 21 Calibration Pressure 3 22 Calibration Menu 3 23 Calibrate NO an...

Page 6: ...4 Date Time 3 65 Diagnostics Menu 3 65 Program Version 3 66 Voltages 3 66 Temperatures 3 68 Pressure 3 68 Flow 3 68 Analog Input Readings 3 69 Analog Input Voltages 3 69 Digital Inputs 3 70 Relay States 3 70 Test Analog Outputs 3 70 Instrument Configuration 3 72 Contact Information 3 72 Alarms Menu 3 73 Internal Temperature 3 74 Chamber Temperature 3 75 Cooler Temperature 3 76 Converter Temperatur...

Page 7: ...emove Password 3 99 Unlock Instrument 3 99 Chapter 4 Calibration 4 1 Equipment Required 4 1 Pre Calibration 4 1 Calibration 4 2 Connecting the GPT Apparatus 4 3 Dynamic Parameter Specifications for Gas Phase Titrator 4 4 Adjusting Instrument Gain 4 6 Preparing NO NOx and NO2 Calibration Curves 4 9 Calibration in Dual Range and Auto Range Mode 4 12 Calibrate Low NO 4 13 Calibrate Low NOx 4 13 Calib...

Page 8: ... Replacement7 13 Photomultiplier Tube Replacement 7 15 PMT High Voltage Power Supply Replacement 7 16 PMT Voltage Adjustment 7 18 Reaction Chamber Cleaning or Removal 7 19 NO2 to NO Converter Replacement 7 21 Solenoid Valve Replacement 7 23 Ozonator Assembly Replacement 7 24 Ozonator Transformer Replacement 7 26 Input Board Replacement 7 26 Input Board Calibration 7 28 DC Power Supply Replacement ...

Page 9: ...bber 8 4 Software 8 4 Instrument Control 8 4 Monitoring Signals 8 4 Measurement Calculations 8 5 Output Communication 8 5 Electronics 8 6 Motherboard 8 6 Measurement Interface Board 8 7 Pressure Sensor Assembly 8 7 Temperature Control Board 8 8 PMT Power Supply Assembly 8 8 Input Board Assembly 8 8 Digital Output Board 8 8 I O Expansion Board Optional 8 9 Front Panel Connector Board 8 9 I O Compon...

Page 10: ...ication Number B 2 Commands B 2 Measurements B 9 Alarms B 12 Diagnostics B 16 Datalogging B 16 Calibration B 23 Keys Display B 26 Measurement Configuration B 28 Hardware Configuration B 32 Communications Configuration B 35 I O Configuration B 39 Record Layout Definition B 44 Format Specifier for ASCII Responses B 44 Format Specifier for Binary Responses B 44 Format Specifier for Front Panel Layout...

Page 11: ...l Connection Diagram Measurement System 6 7 Properly Grounded Antistatic Wrist Strap 7 4 Component Layout 7 7 Remove the Measurement Bench Screws 7 8 Slide Out the Measurement Bench 7 9 Lower the Partition Panel 7 10 Replacing the Pump 7 12 Replacing a Fan 7 13 PMT Cooler and Reaction Chamber 7 14 Replacing the PMT 7 16 Replacing the PMT HVPS 7 17 Cleaning or Removing the Reaction Chamber 7 20 NO2...

Page 12: ...Figures xii Model 42i Low Source Instruction Manual Thermo Electron Corporation Rack Mount Option Assembly 9 4 Bench Mounting 9 5 EIA Rack Mounting 9 6 Retrofit Rack Mounting 9 7 Flag Status B 12 ...

Page 13: ...Board Connector Pin Descriptions 6 19 Input Board Connector Pin Descriptions 6 20 Temperature Control Board Connector Pin Descriptions 6 21 Model 42i Low Source Replacement Parts 7 5 Model 42i Low Source Cables 7 6 Analog Output Channels and Rear Panel Pin Connections 7 31 RS 232 DB Connector Pin Configurations 8 12 RS 485 DB Connector Pin Configuration 8 12 Mounting Options 9 4 C Link Protocol Co...

Page 14: ...Tables xiv Model 42i Low Source Instruction Manual Thermo Electron Corporation ...

Page 15: ...ibrating the analyzer and describes the required equipment Chapter 5 Preventive Maintenance 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 wo...

Page 16: ...not specified by the manufacturer the protection provided by the equipment may be impaired Safety and Equipment Damage Alerts 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 and the actual alerts that appear in this manual Safety and Equipment Damage Alert Descriptions Alert Descrip...

Page 17: ...re before handling converter components Equipment Damage Do not attempt to lift the analyzer by the cover or other external fittings This adjustment should only be performed by an instrument service technician 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 Handle all printe...

Page 18: ... to Get Help Service is available from exclusive distributors worldwide Contact one of the phone numbers below for product support and technical information 866 282 0430 Toll Free 508 520 0430 International Symbol Description Marking of electrical and electronic equipment which applies to electrical and electronic equipment falling under the Directive 2002 96 EC WEEE and the equipment that has bee...

Page 19: ...ogrammable ranges User selectable single dual auto range modes Multiple user defined analog outputs Analog input options High sensitivity Fast response time Linearity through all ranges Independent NO NO2 NOx ranges Replaceable NO2 converter cartridge User selectable digital input output capabilities Standard communications features include RS232 485 and Ethernet C Link MODBUS and streaming data p...

Page 20: ... heated to about 625 C the optional molybdenum converter is heated to 325 C The ambient air sample is drawn into the Model 42i Low Source through the sample bulkhead as shown in Figure 1 1 The sample flows through a capillary and then to the mode solenoid valve The solenoid valve routes the sample either straight to the reaction chamber NO mode or through the NO2 to NO converter and then to the re...

Page 21: ... 0 2 0 5 1 2 5 10 20 50 100 ppm 0 0 5 1 2 5 10 20 50 100 150 mg m3 Extended ranges 0 1 2 5 10 20 50 100 200 500 ppm 0 2 5 10 20 50 100 200 500 750 mg m3 Custom ranges 0 0 2 to 100 ppm 0 1 to 500 ppm in extended ranges 0 0 5 to 150 mg m3 0 2 to 750 mg m3 in extended ranges Zero noise 0 005 ppm RMS 60 second averaging time Lower detectable limit 0 01 ppm 60 second averaging time Zero drift 24 hour 0...

Page 22: ...lbs Analog outputs 6 voltage outputs 0 100 mV 1 V 5 V 10 V User selectable 5 of full scale over under range 12 bit resolution user selectable for measurement input 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 w...

Page 23: ...is desirable to have two persons lifting one by grasping the bottom in the front and the other by grasping the bottom in the rear Unpacking and Inspection The Model 42i Low Source is shipped complete in one container If there is obvious damage to the shipping container when you receive the instrument notify the carrier immediately and hold for inspection The carrier is responsible for any damage i...

Page 24: ... Remove the Packing Material 4 Remove the three shipping screws Figure 2 2 Figure 2 2 Remove the Shipping Screws 5 Check for possible damage during shipment 6 Check that all connectors and circuit boards are firmly attached Units without Optional I O Board Units with Optional I O Board Remove Packing Remove Packing 2 pieces 2 pieces Shipping Screws 3 ...

Page 25: ...ospheric pressure It may be necessary to use an atmospheric bypass plumbing arrangement as shown in Figure 2 4 if gas pressure is greater than atmospheric pressure 2 Connect the air dryer to the DRY AIR bulkhead 3 Connect the EXHAUST bulkhead to a suitable vent or ozone scrubber The exhaust line should be 1 4 inch OD with a minimum ID of 1 8 inch The length of the exhaust line should be less than ...

Page 26: ...el 42i Low Source Instruction Manual Thermo Electron Corporation Figure 2 3 Model 42i Low Source Rear Panel Figure 2 4 Atmospheric Dump Bypass Plumbing Instrument Bulkhead Input Gas Line Vent to Exhaust Line at Atmospheric Pressure SAMPLE ...

Page 27: ...e It is best to turn the ozonator on and let the instrument run overnight before calibration in order to obtain the most accurate information 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 actual instrument monitoring perform a multipoint calibration as de...

Page 28: ...Installation Startup 2 6 Model 42i Low Source Instruction Manual Thermo Electron Corporation ...

Page 29: ... Averaging Time on page 3 17 describes the averaging period applied to NO NO2 and NOx measurements Calibration Factors Menu on page 3 18 describes the calibration factors used to correct NO NO2 and NOx measurement readings Calibration Menu on page 3 23 describes calibration of zero and span Instrument Controls Menu on page 3 30 describes the instrument hardware control and configuration Diagnostic...

Page 30: ...trument controls help and error messages Some menus contain more items than can be displayed at one time For these menus use and to move the cursor up and down to each item Figure 3 1 42i Low Source Front Panel Display CAUTION If the LCD panel breaks do not 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...

Page 31: ...e Main Menu when in the Run screen or back up one level in the menu system For more information about the Main Menu see Main Menu later in this chapter Help The is context sensitive that is it provides additional information about the screen that is being displayed Press for a brief explanation about the current screen or menu Help messages are displayed using lower case letters to easily distingu...

Page 32: ...m cannot be assigned the key assignment screen will not come up upon entering right arrow soft key combinations All items under the Service menu including the menu itself cannot be assigned soft keys Software Overview The Model 42i Low Source utilizes the menu driven software illustrated by the flowchart in Figure 3 3 The Power Up screen shown at the top of the flowchart is displayed each time the...

Page 33: ...N 2TGUUWTG PUVTWOGPV QPVTQNU 1 QPCVQT 2 6 5WRRN WVQ CP QFG CVCNQIIKPI 5GVVKPIU QOO 5GVVKPIU 1 QPHKI 6GOR QORGPUCVKQP 2TGU QORGPUCVKQP 5ETGGP QPVTCUV 5GTXKEG QFG CVG 6KOG KCIPQUVKEU 2TQITCO 8GTUKQP 8QNVCIGU 6GORU 2TGUUWTG NQY PCNQI PRWV 4GCFKPIU PCNQI PRWV 8QNVCIGU KIKVCN PRWVU 4GNC 5VCVGU 6GUV PCNQI 1WVRWVU PUVTWOGPV QPHKI QPVCEV PHQ NCTOU NCTOU GVGEVGF PVGTPCN 6GOR JCODGT 6GOR QQNGT 6GOR QPX 6GOR...

Page 34: ...he analyzer has the 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 LOW and HIGH concentrations Also two averaging times are used one for each ...

Page 35: ... 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 X CONCENTRATION W NO 62 7 PPB NO2 25 5 PPB NOx 88 2 PPB SAMPLE 12 34 ALARMx RANGE AVG DIAGS ALARM XXLO WCONCENTRATIONXXLO W NO 62 7 PPB NO2 25 5 PPB NOx...

Page 36: ...Single Range Mode 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 Single Dual Auto Select in the Service Menu later in this chapter RANGE RAN...

Page 37: ...e Table 3 2 Default Analog Outputs in Single Range Mode Note All channels are user definable If any customization has been made to the analog output configuration the default selections may not apply Channel Pin Description 1 14 NO Analog Output 2 33 NO2 Analog Output 3 15 NOx Analog Output 4 34 None 5 17 None 6 36 None Ground 16 18 19 35 37 Signal Ground ...

Page 38: ...00 ppb and the high NO analog output set to output concentrations from 0 to 500 ppb In addition to each channel having two ranges each channel has two span coefficients There are two span coefficients so that each range can be calibrated separately This is necessary if the two ranges are not close to one another For example if the low NO range is set to 0 200 ppb and the high NO range is set to 0 ...

Page 39: ... to the low ranges analog outputs and sample concentrations above 200 ppb are presented to the high ranges analog outputs When the low ranges are active the status output is at 0 volts When the high ranges are active the status output is at half of full scale When the high ranges are active the NOx concentration must drop to 95 of the low NOx range for the low ranges to become active In addition t...

Page 40: ...6 Analog Output in Auto Range Mode By default in the auto range mode the analog outputs are arranged on the rear panel connector as shown in Figure 3 7 See Table 3 4 for channels and pin connections Auto range mode may be selected from the Single Dual Auto Select in the Service Menu later in this chapter ...

Page 41: ...g Outputs in Auto Range Mode Note All channels are user definable If any customization has been made to the analog output configuration the default selections may not apply Channel Pin Description 1 14 NO Analog Output 2 33 NO2 Analog Output 3 15 NOx Analog Output 4 34 Range Status half scale high range zero scale low range 5 17 None 6 36 None Ground 16 18 19 35 37 Signal Ground ...

Page 42: ...hrough a list of choices Press to save the new units Note If the units change from ppb ppm to µg m3 mg m3 or vice versa the instrument should be recalculated particularly if the user s standard temperature is different from 20 C A display warning will appear that ranges will be defaulted and calibration parameters reset NO NO2 and NOx Ranges The NO NO2 and NOx Ranges define the concentration range...

Page 43: ...readjusted For more information about readjusting the PMT voltage see Chapter 7 Servicing In the Main Menu choose Range NO NO2 or NOx Range Use and to scroll through a list of choices Press to save the new range Table 3 5 Standard Ranges ppb ppm µg m3 mg m3 200 0 2 500 0 5 500 0 5 1 000 1 0 1 000 1 0 2 000 2 0 2 000 2 0 5 000 5 0 5 000 5 0 10 000 10 0 10 000 10 0 20 000 20 0 20 000 20 0 50 000 50 ...

Page 44: ... 5 mg m3 and 150 000 µg m3 150 mg m3 can be specified as a range In the extended range mode any value between 1 000 ppb 1 0 ppm and 500 000 ppb 500 ppm can be specified as a range In the µg m3 mg m3 mode any value between 2 000 µg m3 2 0 mg m3 and 750 000 µg m3 750 mg m3 can be specified as a range In the Main Menu choose Range Set Custom Ranges ppb ppm µg m3 mg m3 1 000 1 0 2 000 2 0 2 000 2 0 5 ...

Page 45: ...econds with the calculated averages An averaging time of 10 seconds for example means that the average concentration of the last 10 seconds will be output at each update An averaging time of 300 seconds means that the moving average concentration of the last 300 seconds will be output at each 10 second update Therefore the lower the averaging time the faster the front panel display and analog outp...

Page 46: ...erates 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 Normally the instrument is calibrated automatically using the commands listed in the Calibration menu described later in this chapter However the instrument can also be calibrated manually using the...

Page 47: ... ppb The NO and NOx Background screens are used to perform a manual adjustment of the instruments zero background Before performing a background adjustment allow the analyzer to sample zero air until stable readings are obtained The NO channel should be adjusted first Both the NO and NOx Background screens operate the same way Therefore the following description of the NO background screen applies...

Page 48: ...on is increased the NO concentration is decreased Note that at this point pressing and however has no affect on the analog outputs or the stored NO background correction of 0 0 ppb A question mark following both the NO reading and the NO background correction indicates that these are proposed changes as opposed to implemented changes To escape this screen without saving any changes press to return...

Page 49: ... concentration reading The next line of the display shows the NO span coefficient that is stored in memory and is being used to correct the NO concentration Notice that as the span coefficient value is changed the current NO concentration reading on the above line also changes However no real changes are made to the value stored in memory until is pressed Only proposed changes as indicated by a qu...

Page 50: ...he pressure compensation feature is to be used the instrument must be calibrated with the pressure compensation feature on For more information about calibration see Chapter 4 Calibration In the Main Menu choose Calibration Factors Calibration Pressure Use and to increment or decrement the calibration pressure value Press to save the new calibration pressure Reset User Calibration Default The Rese...

Page 51: ... 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 range Whether dual or single range the first step in calibrating the instrument is to assign the calibration pressure The calibration pressure is used to account for slight pressure fluctuation brought on by changing weather...

Page 52: ...e most precise calibration use the 300 second averaging time For more information about calibration see Chapter 4 Calibration In the Main Menu choose Calibration Calibrate NO or NOx Background Press to set the new reading to zero CALIBRATION CALIBRATION CAL NO BACKGROUND CAL NO BACKGROUND CAL NOx BACKGROUND CAL NOx BACKGROUND CAL NO COEFFICIENT CAL HI NO COEFFICIENT CAL NO2 COEFFICIENT CAL HI NO2 ...

Page 53: ...range The next line of the display is where the NO calibration gas concentration is entered It is important to note the averaging time when calibrating The longer the averaging time the more precise the calibration will be For the most precise calibration use the 300 second averaging time For more information about calibration see Chapter 4 Calibration In the Main Menu choose Calibration Cal NO NO...

Page 54: ... instrument to perform fully automated zero and span check or adjustments Total Duration Hour is the sum of zero span and purge duration minutes Zero and Span Calibration Reset are toggle items that change between yes or no when selected and displayed if auto calibration is installed In the Main Menu choose Calibration Zero Span Check CALIBRATE PRESSURE CUR CAL PRES 150 0 mmHg CURRENT PRES 151 6 m...

Page 55: ...o accept a change Period Hours The Zero Span Period Hours screen defines the period or interval between zero span checks Periods between 0 and 999 hours are acceptable To turn the zero span check off set the period to 0 In the Main Menu choose Calibration Zero Span Check Period Hours Use and to increment and decrement the numeric value Press to save the period NEXT DATE AND TIME NEXT DATE AND TIME...

Page 56: ...lies to perform just a span or purge check In the Main Menu choose Calibration Zero Span Check Zero Span or Purge Duration Min Use and to increment and decrement the numeric value Press to save the duration value Zero Span Averaging Time The Zero Span Averaging Time screen allows the user to adjust the zero span averaging time The zero span averaging time is used by the analyzer only when performi...

Page 57: ...is value is set to 3 there will be two zero checks between each zero span check This value may be set from 1 to 10 with 1 as default In the Main Menu choose Calibration Zero Span Check Zero Span Ratio Use and to increment and decrement the numeric value Press to save the ratio value ZERO SPAN AVERAGING TIME CURRENTLY 60 SEC SET TO 90 SEC ª CHANGE VALUE SAVE VALUE RANGE AVG DIAGS ALARM ZERO SPAN RA...

Page 58: ...dicate any flow or if the NO2 converter temperature is below the minimum alarm limit In this case an alarm is activated and the ozonator 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...

Page 59: ...O NO2 and NOx concentrations are determined The manual NO mode puts the mode solenoid valve into the open 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 det...

Page 60: ...t SREC LREC is used to select short record or long record format for other operations in this menu In the Main Menu choose Instrument Controls Datalogging Settings Select SREC LREC Use and to scroll through a list of choices Press to set record format MODE CURRENTLY MANUAL NO SET TO NO NOX ª CHANGE VALUE SAVE VALUE RANGE AVG DIAGS ALARM DATALOGGING SETTINGS SELECT SREC LREC SREC VIEW LOGGED DATA E...

Page 61: ...ct SREC or LREC View Logged Data Use and to toggle between number of records or date and time Press to accept Number of Records The Number of Records screen is used to select the starting point to display the number of records back to view Use and to increment or decrement the numeric value Press to set the starting record and continue to the record display screen SELECT LOG TYPE CURRENTLY SREC SE...

Page 62: ...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 Use and to increment or decrement the selected field Use to advance to next field Press to set the date and time of the first record to be displayed and continue to the record display screen SET BACK FROM CURRENT 0000000 TOTAL LRECS 20 MOVE...

Page 63: ...og is used to erase all saved data for the selected record type not all short records and long records In the Main Menu choose Instrument Controls Datalogging Settings Erase Log Press to erase all data Press to confirm erasure DATE AND TIME 20 JUN 2005 10 00 ª CHG DAYS SET CURSOR TO MONTHS ACCEPT AS SHOWN RANGE AVG DIAGS ALARM time date flags 10 01 06 20 05 FC0088900 10 02 06 20 05 FC0088900 10 03...

Page 64: ...be committed via the datalogging menu before the changes will apply Note that committing any changes to this list will erase all currently logged data as the format of the stored data is changed In the Main Menu choose Instrument Controls Datalogging Settings Select Content ERASE LREC LOG FILE DATA ERASE LREC LOG FILE DATA ERASE ERASE ARE YOU SURE YOU WANT TO x PRESS TO CONFIRM ERASURE RANGE AVG D...

Page 65: ...ettings Select Content Select Field Concentrations Use and to move the cursor up and down Press to select a new choice Other Measurements The Other Measurements screen allows the user to select the output signal that is 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 ...

Page 66: ...a see Commit Content below In the Main Menu choose Instrument Controls Datalogging Settings Select Content Select Field Analog Inputs Use and to move the cursor up and down Press to select a new choice Commit Content The Commit Content screen is used to save the selected output signal that is tied to the selected field item For more information about selecting the analog output signal group choice...

Page 67: ...electing the analog output signal group choices see Select Content above In the Main Menu choose Instrument Controls Datalogging Settings Reset to Default Content Press to reset selected record format and erase record log file data Press to reset CHANGE LREC FORMAT AND CHANGE LREC FORMAT AND ERASE LREC LOG FILE DATA ERASE LREC LOG FILE DATA COMMIT COMMIT ARE YOU SURE YOU WANT TO x PRESS TO CONFIRM...

Page 68: ... minutes default In the Main Menu choose Instrument Controls Datalogging Settings Configure Datalogging Logging Period Min Use and to scroll through a list of choices Press to set the logging period Memory Allocation Percent The Memory Allocation Percent screen is used to select the percentage of each record type for both short records and long records Percentages between 0 and 100 are available i...

Page 69: ...d be averaged over the interval the minimum or maximum used or the current value logged 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 Instrument Controls Datalogging Settings Configure Datalogging Data Treatment Use and to scroll through a list of choices Press to set the...

Page 70: ... to scroll through a list of choices Press to save the new baud rate Instrument ID 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 over the s...

Page 71: ...mmunication Protocol The Communication Protocol screen is used to change the instrument communication protocol for serial communications This does not affect communications over Ethernet because the protocols are processed simultaneously on different ports In the Main Menu choose Instrument Controls Communication Settings Communication Protocol Use and to scroll through a list of choices Press to ...

Page 72: ...pend Timestamp are toggle items that change between yes or no when selected In the Main Menu choose Instrument Controls Communication Settings Streaming Data Config Streaming Data Interval The Streaming Data Interval screen is used to adjust the streaming data interval The following interval times are available 1 2 5 10 20 30 60 90 120 180 240 and 300 seconds In the Main Menu choose Instrument Con...

Page 73: ... mode In the Main Menu choose Instrument Controls Communication Settings Streaming Data Config Select Item Concentrations Use and to move the cursor up and down Press to select a new choice Other Measurements The Other Measurements 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 the Main Menu choose Instr...

Page 74: ...nalog Inputs Use and to move the cursor up and down Press to select a new choice RS 232 RS 485 Selection The RS 232 RS 485 Selection screen allows the user to choose between the RS 232 or RS 485 specification for serial communication Note Disconnect the serial cable before changing RS 232 and RS 485 selection to prevent damage to the connected equipment In the Main Menu choose Instrument Controls ...

Page 75: ...e instrument power must be cycled after this parameter has been changed for the change to take effect In the Main Menu choose Instrument Controls Communication Settings TCP IP Settings Use DCHP Press to toggle and set DHCP on or off RS 232 RS 485 SELECTION RS 232 RS 485 SELECTION XXXXXX WARNING XXXXXXX CURRENTLY RS 232 DISCONNECT THE SERIALX X SET TO RS 485 CABLES BEFORE CHANGING X MAKE SURE THAT ...

Page 76: ... the value of the IP address Press to save the new address Netmask The Netmask screen is used to edit the netmask address In the Main Menu choose Instrument Controls Communication Settings TCP IP Settings Netmask Use and to move and change the value of the netmask Press to save the new address DHCP CURRENTLY OFF SET TO ON TOGGLE VALUE CYCLE POWER TO CHANGE DHCP RANGE AVG DIAGS ALARM IP ADDRESS CUR...

Page 77: ...t 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 Use and to move the cursor or change between the edit field and the alpha page Press to save the new letter in the alpha table or save the new alpha page NETMASK CURRENT 255 255 255 0 SET TO 255 255 25...

Page 78: ...Settings menu displays a list of the 10 analog output relays available and allows the user to select the logic state and instrument parameter for the relay selected Note The digital outputs may take up to one second after the assigned state occurs to show up on the outputs In the Main Menu choose Instrument Controls I O Configuration Output Relay Settings HOST NAME CURRENT ISERIES ISERIES SSSSSS A...

Page 79: ...e user to select the instrument state that is tied to the selected relay output A submenu lists signal types of either alarms or non alarm to choose from In the Main Menu choose Instrument Controls I O Configuration Output Relay Settings Select Relay Instrument State 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 ...

Page 80: ...ew selection for the relay Non Alarm The Non Alarm status screen allows the user to select the non alarm status for the selected relay output The selected item is shown by after it Items displayed are determined by the options installed In the Main Menu choose Instrument Controls I O Configuration Output Relay Settings Select Relay Instrument State Non Alarm Use and to scroll through a list of cho...

Page 81: ...used to change the I O relay to either normally open or normally closed The default state is open which indicates that a relay connected between the digital input pin and ground is normally open and closes to trigger the digital input action If nothing is connected to the digital input pin the state should be left at open to prevent the action from being triggered Press to toggle and set the logic...

Page 82: ...e new selection for the relay Analog Output Configuration The Analog Output Configuration menu displays a list of the analog output channels available for configuration Channel choices include all voltage channels all current channels voltage channels 1 6 and current channels 1 6 if the I O expansion board option is installed Configuration choices include selecting range setting minimum maximum va...

Page 83: ...10 V In the Main Menu choose Instrument Controls I O Configuration Analog Output Config Select Channel Select Range Use and to move the cursor up and down Press to save the new range OUTPUT CHANNELS ALL VOLTAGE CHANNELS ALL CURRENT CHANNELS VOLTAGE CHANNEL 1 VOLTAGE CHANNEL 2 VOLTAGE CHANNEL 3 VOLTAGE CHANNEL 4 VOLTAGE CHANNEL 5 ª RANGE AVG DIAGS ALARM ANALOG OUTPUT CONFIG SELECT RANGE SET MINIMUM...

Page 84: ...rement the numeric value Press to validate and save the new minimum value Table 3 7 Analog Output Zero to Full Scale Table Output Zero Value Full Scale 100 Value NO Zero 0 Range Setting NO2 Zero 0 Range Setting NOx Zero 0 Range Setting LO NO Zero 0 Range Setting LO NO2 Zero 0 Range Setting LO NOx Zero 0 Range Setting HI NO Zero 0 Range Setting HI NO2 Zero 0 Range Setting HI NOx Zero 0 Range Settin...

Page 85: ...Config Select Channel Choose Signal To Output Use and to move the cursor up and down Press to select a choice NO2 Converter Temp User set alarm min value User set alarm max value Chamber Pressure User set alarm min value User set alarm max value PMT Volts 700 volts 1100 volts Everything Else 0 units 10 units Table 3 7 Analog Output Zero to Full Scale Table Output Zero Value Full Scale 100 Value Ta...

Page 86: ...er of points selected In the Main Menu choose Instrument Controls I O Configuration Analog Input Config LO NO2 dual mode Chamber Pressure Analog Input 5 LO NOx dual mode PMT Volts Analog Input 6 HI NO dual mode Analog Input 7 HI NO2 dual mode Analog Input 8 HI NOx dual mode Range NOx auto range mode Table 3 8 Signal Type Group Choices Concentrations Other Measurements Analog Inputs ANALOG INPUT CO...

Page 87: ...g Input Config Select Channel Descriptor Press to save the new descriptor Units The Units screen allows 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 ...

Page 88: ...o increment or decrement the value Press to save the new value Number of Table Points The Number of Table Points screen allows the user to select how many points are used in the conversion table The points range from 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 Use and to move the cursor up and down Press ...

Page 89: ...o set the input voltage for the selected table point in the conversion table from 0 00 to 10 50 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 Channel Select Point Volts Use and to move the cursor up and down Press to save the new value TABLE POINT 01 CONFIG VOLTS...

Page 90: ...ure variations The effects of internal instrument temperature changes on the analyzer s subsystems and output have been empirically determined This empirical data is used to compensate for any changes in temperature This compensation can be used for special applications or when operating the instrument outside the recommended temperature range even though the Model 42i Low Source does not require ...

Page 91: ...compensation can be used even though the Model 42i Low Source does not require pressure compensation for EPA equivalency 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 150 mmHg In the Main Menu choose Instrument Controls Pres...

Page 92: ... a change Service Mode The Service Mode screen is used to turn the service mode on or off The service mode locks out any remote actions and includes parameters and functions that are useful when making adjustments or diagnosing the Model 42i Low Source 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 p...

Page 93: ...stics menu provides access to diagnostic information and functions This menu is useful when troubleshooting the instrument The analog input readings and analog input voltages are displayed if the I O expansion board option is installed In the Main Menu choose Diagnostics DATE AND TIME 19 MAR 2005 12 34 56 DATE AND TIME PRESS TO EDIT 19 MAR 2005 12 34 56 SETTING DAYS SET MONTHS ª CHANGE VALUE SAVE ...

Page 94: ...rrent diagnostic voltage readings This screen enables the power supply to be quickly read for low or fluctuating voltages without having to use a voltage meter The I O board is displayed if the I O expansion board option is installed In the Main Menu choose Diagnostics Voltages Motherboard Voltages The Motherboard screen read only is used to display the current voltage readings on the motherboard ...

Page 95: ... on the I O expansion board This screen is displayed if the I O expansion board option is installed In the Main Menu choose Diagnostics Voltages I O Board Voltages MOTHERBOARD VOLTAGES 3 3 SUPPLY 3 3 V 5 0 SUPPLY 5 0 V 15 0 SUPPLY 15 0 V 24 0 SUPPLY 24 0 V 3 3 SUPPLY 3 3 V RANGE AVG DIAGS ALARM INTERFACE BOARD VOLTAGES PMT SUPPLY 785 5 V 3 3 SUPPLY 3 3 V 5 0 SUPPLY 5 0 V 15 0 SUPPLY 15 0 V P15 0 S...

Page 96: ...tics Temperatures Pressure The Pressure screen read only displays the reaction chamber pressure The pressure is measured by a pressure transducer at the reaction chamber In the Main Menu choose Diagnostics Pressure Flow The Flow screen read only displays the ozone flow rate An internal flow sensor measures the ozone flow For more information see Chapter 1 Introduction In the Main Menu choose Diagn...

Page 97: ...es 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 OZONATOR FLOW OK RANGE AVG DIAGS ALARM ANALOG INPUT READINGS CO 10 2 PPM SO2 18 2 PPB CO2 250 PPM FL1 20 42 LPM WND 9 86 V FL2 1 865 LPM IO7 0 0 Vª RANGE AVG DIAGS ALARM ANALOG INPUT VOLTAGES ANALOG IN 1 6 ...

Page 98: ... original states upon exiting this screen In the Main Menu choose Diagnostics Relay States Test Analog Outputs 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 installed In the Main Menu choose Diagnostics Test Analog Outputs D...

Page 99: ...rmal operation The example below shows the selected output state ALL is set to normal In the Main Menu choose Diagnostics Test Analog Outputs ALL Voltage Channel 1 6 or Current Channel 1 6 Use and to move the cursor up and down Press to select a choice TEST ANALOG OUTPUTS ALL VOLTAGE CHANNEL 1 VOLTAGE CHANNEL 2 VOLTAGE CHANNEL 3 VOLTAGE CHANNEL 4 VOLTAGE CHANNEL 5 VOLTAGE CHANNEL 6 ª RANGE AVG DIA...

Page 100: ... the Main Menu choose Diagnostics Instrument Configuration Press to toggle instrument configuration in service mode only Contact Information The Contact Information screen displays the customer service information In the Main Menu choose Diagnostics Contact Information INSTRUMENT CONFIGURATION I O EXPANSION BOARD YES ZERO SPAN VALVES YES LAG VOLUME NO PERM DRYER NO CONVERTER SS DILUTION NO AUTO CA...

Page 101: ...m and its minimum and maximum limits move the cursor to the item and press The zero span check and auto calibration screens are displayed 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 indicates that the power supplies are working and connections are successful There are no setting screens for...

Page 102: ...and in the Main Menu In the Main Menu choose Alarms Internal Temp Min and Max Internal Temperature Limits The 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 Use and to increment or decrement the numeric va...

Page 103: ...nd in the Main Menu In the Main Menu choose Alarms Chamber Temp Min and Max Chamber Temperature Limits The Minimum Chamber Temperature alarm limit screen is used to change the minimum chamber temperature alarm limit The minimum and maximum internal temperature screens function the same way In the Main Menu choose Alarms Chamber Temp Min or Max Use and to increment or decrement the numeric value Pr...

Page 104: ...en and in the Main Menu In the Main Menu choose Alarms Cooler Temp Min and Max Cooler Temperature Limits The Minimum Cooler Temperature alarm limit screen is used to change the minimum cooler temperature alarm limit The minimum and maximum cooler temperature screens function the same way In the Main Menu choose Alarms Cooler Temp Min or Max Use and to increment or decrement the numeric value Press...

Page 105: ...he Main Menu In the Main Menu choose Alarms Converter Temp Min and Max Converter Temperature Limits The Minimum Converter Temperature alarm limit screen is used to change the minimum converter temperature alarm limit The minimum and maximum converter temperature screens function the same way Note The ozonator will not turn on if the converter is below alarm limit In the Main Menu choose Alarms Con...

Page 106: ...ppears in the Run screen and in the Main Menu In the Main Menu choose Alarms Pressure Min and Max Pressure Limits The Minimum Pressure alarm limit screen is used to change the minimum pressure alarm limit The minimum and maximum pressure screens function the same way In the Main Menu choose Alarms Pressure Min or Max Use and to increment or decrement the numeric value Press to save set to value as...

Page 107: ...to the ozonator In the Main Menu choose Alarms Ozonator Flow Zero and Span Check The Zero Span Check screen allows the user to view the status of the most recent zero check and set the maximum zero check offset The zero and span check screens are displayed if the zero span check option is enabled and function the same way In the Main Menu choose Alarms Zero or Span Check Max Zero and Span Offset T...

Page 108: ...ation and sets the minimum and maximum alarm limits Acceptable alarm limits range from 0 to 500 000 ppb 0 to 500 ppm and 0 to 750 000 µg m3 0 to 750 mg m3 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 concentration goes above the minimum value If the NO concentration go...

Page 109: ...as actual value Min Trigger The Minimum Trigger screen allows the user to view and set the NO NO2 and NOx concentration low 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 concentration goes above the minimum value In the Main...

Page 110: ...are included in the service mode Meaningful data should not be collected when the instrument is in the service mode In the Main Menu choose Service MIN TRIG CEILING FLOOR ACTUAL TRIGGER CEILING SET TRIGGER TO FLOOR TOGGLE AND SAVE VALUE RANGE AVG DIAGS ALARM SERVICE PMT VOLTAGE ADJUSTMENT RANGE MODE SELECT CONVERTER SET TEMP PRESSURE CALIBRATION INPUT BOARD CALIBRATION TEMPERATURE CALIBRATION ANAL...

Page 111: ... or decrement the PMT counts Press to save the new PMT voltage Range Mode Select The Range Mode Select screen is used to switch between the various range modes single dual and auto range The range mode select screen is visible only when the instrument is in service mode For more information on the service mode see Service Mode earlier in this chapter In the Main Menu choose Service Range Mode Sele...

Page 112: ... Temperature Use and to increment or decrement the numeric values Press to save the new set temperature Pressure Calibration The Pressure Calibration menu is used to calibrate the pressure sensor to zero span or restore factory default values The pressure calibration menu is visible only when the instrument is in service mode For more information on the service mode see Service Mode earlier in thi...

Page 113: ...sensor before performing the zero calibration In the Main Menu choose Service Pressure Calibration Zero Press to save the current pressure reading as the zero reading Calibrate Pressure Span The Calibrate Pressure Span screen allows the user to view and set the pressure sensor calibration span point WARNING This adjustment should only be performed by an instrument service technician PRESSURE SENSO...

Page 114: ...ave set to value as actual value Restore Default Pressure Calibration The Restore Default Pressure Calibration screen allows the user to reset the pressure calibration configuration values to factory defaults In the Main Menu choose Service Pressure Calibration Set Defaults Press to warn user and enable restore with Use to overwrite pressure sensor calibration parameters with factory default value...

Page 115: ...nual calibration of the input board A D stages Note The measurement system and the PMT are both shut off inside this screen In the Main Menu choose Service Input Board Calibration Manual Input Cal Press to leave warning screen Make a note of the frequency at gain of 1 Use and to change the gain between 10 and 100 Use and to increment or decrement the D A counts so the frequency at gain 100 is equa...

Page 116: ... to leave warning screen and begin automatic calibration INPUT BOARD CALIBRATION GAIN 1 MANUAL TO CALIBRATE FREQ 4500 D A N A XXXXXX WARNING XXXXXXX THIS ACTION MAY REQUIREXX CHG GAIN RECALIBRATION OF THEXXXX SAVE VALUES ENTIRE MEASUREMENT SYSTEM RANGE AVG DIAGS ALARM RANGE AVG DIAGS ALARM WARNING This adjustment should only be performed by an instrument service technician INPUT BOARD CALIBRATION ...

Page 117: ...bration The Temperature calibration screen allows the user to view and set the ambient temperature sensor calibration The temperature calibration 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 In the Main Menu choose Service Temperature Calibration Use and to move and change the value Press to save set ...

Page 118: ...trument is in service mode For more information on the service mode see Service Mode earlier in the chapter In the Main Menu choose Service Analog Out Calibration CALIBRATE AMBIENT TEMP CURRENTLY 28 6 o C SET TO 25 0 o C MOVE CURSOR ª CHANGE VALUE SAVE RANGE AVG DIAGS ALARM WARNING This adjustment should only be performed by an instrument service technician ANALOG OUTPUT CAL VOLTAGE CHANNEL 1 VOLT...

Page 119: ... Calibrate Full Scale The Analog Output Calibrate Full Scale screen allows the user to calibrate the full scale state of the selected analog output The operator must connect a meter to the output and adjust output until it reads the value shown in the set output to field In the Main Menu choose Service Analog Out Calibration Select Channel Calibrate Full Scale Use and to increment or decrement the...

Page 120: ...er In the Main Menu choose Service Analog Input Calibration Analog Input Calibrate Zero The Analog Input Calibrate Zero screen allows the user to calibrate the zero state of the selected analog input In the Main Menu choose Service Analog Input Calibration Select Channel Calibrate Zero Hook up a voltage source of 0 V to the analog input channel Press to save the value WARNING This adjustment shoul...

Page 121: ...Service Analog Input Calibration Select Channel Calibrate Full Scale Hook up a voltage source of 10 V to the analog input channel Use and to increment or decrement the numeric value Press to save the value ANALOG INPUT CAL ZERO DISCONNECT SELECTED INPUT SELECTED INPUT INPUT 1 CURRENTLY 6 24 V CALIBRATE INPUT TO ZERO RANGE AVG DIAGS ALARM ANALOG INPUT CAL SPAN PROVIDE VOLTAGE TO INPUT SELECTED INPU...

Page 122: ... see Service Mode earlier in the chapter In the Main Menu choose Service Ozonator Safety Press to toggle and set the service mode on or off Extended Ranges The Extended Ranges screen is used to turn the extended ranges feature on and off The extended ranges 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...

Page 123: ... move and change the value Press to save set to value as actual value Display Pixel Test The Display Pixel Test is used to test the LCD display The display pixel test 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 In the Main Menu choose Service Display Pixel Test Press to begin test by turning all pixe...

Page 124: ... service mode For more information on the service mode see Service Mode earlier in the chapter Note When this item is selected the instrument will be automatically rebooted after restoring defaults In the Main Menu choose Service Restore User Defaults Press to warn and enable restore with Press to overwrite all user settings with factory default values RESTORE USER DEFAULTS RESTORE USER DEFAULTS R...

Page 125: ...red or the password has not been set In the Main Menu choose Password Set Password The Set Password screen is used to set the password to unlock the front panel The set password is shown if the instrument is unlocked and the password not set In the Main Menu choose Password Set Password Press to enter password and disable instrument lock PASSWORD MENU SET PASSWORD LOCK INSTRUMENT CHANGE PASSWORD R...

Page 126: ...nstrument Press to enable instrument lock and returns to main menu Change Password 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 Press to change password LOCK FRONT PANEL xxxPRESSING ENTER WILLxxxx PREVENT USER FROM CHANGING xCONFIG FROM FRONT...

Page 127: ...ve password and returns to main menu Unlock Instrument 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 Press to disable instrument lock and returns to main menu REMOVE PASSWORD xxxPRESSING ENTER WILLxxxx xREMOVE CURRENT PASSWORDxx xxxAND DISABLE LOCKING...

Page 128: ...Operation Password 3 100 Model 42i Low Source Instruction Manual Thermo Electron Corporation ...

Page 129: ...42i Low Source For detailed information about the menu parameters and the icons used in these procedures see the Operation chapter Note The calibration and calibration check duration times should be long enough to account for the transition purge process when switching from sample to zero and from zero to span This transition time is the time required to purge the existing air Depending on the plu...

Page 130: ...apter Note The averaging time should be less than the zero duration and less than the span duration 6 Set the calibration pressure to the current reactor pressure a Push choose Calibration Factors Cal Pressure b Use to increment decrement the value to match the current reactor pressure and press to save the new calibration pressure value 7 Verify that any filters used during normal monitoring are ...

Page 131: ...etween these values Connecting the GPT Apparatus Use the following procedure to connect the GPT apparatus 1 Assemble a dynamic calibration system such as the one shown in Figure 4 1 2 Ensure that all flowmeters are calibrated under the conditions of use against a reliable standard such as a soap bubble meter or wet test meter All volumetric flow rates should be corrected to 25 C and 760 mm Hg 3 Pr...

Page 132: ...he following definitions for the remainder of this chapter PR Dynamic parameter specification to ensure complete reaction of the available O3 ppm min NO RC NO concentration in the reaction chamber ppm tR Residence time of the reactant gases in the reaction chamber min NO STD Concentration of the undiluted NO standard ppm FNO NO flow rate sccm FO O3 generator air flow rate sccm VRC Volume of the re...

Page 133: ...ut manifold which should be equal to the analyzer demand plus 10 to 50 percent excess 2 Establish NO OUT as the highest NO concentration that will be required at the output manifold NO OUT should be about equal to 90 of the upper range limit URL of the NO2 concentration range to be covered 3 Determine FNO as 4 Select a convenient or available reaction chamber volume Initially a trial volume may be...

Page 134: ...tion chapter 1 Determine the GPT flow conditions required to meet the dynamic parameter specifications as indicated in Dynamic Parameter Specifications for Gas Phase Titrator earlier in this chapter 2 Adjust the GPT diluent air and O3 generator air flows to obtain the flows determined in Dynamic Parameter Specifications for Gas Phase Titrator earlier in this chapter The total GPT airflow must exce...

Page 135: ...ed NO concentration at the output manifold ppm NOSTD No feed concentration FNO No flow FO Ozone flow FD Dilution flow 4 Allow the analyzer to sample the NO calibration gas until the NO NO2 and NOx readings stabilize 5 When the responses stabilize from the Main Menu choose Calibration Calibrate NO Coefficient The NO line of the Calibrate NO screen displays the current NO concentration The SPAN CONC...

Page 136: ... plus any known NO2 impurity The NOx line of the Calibrate NOx screen displays the current NOx concentration The SPAN CONC line of the display is where you enter the NOx calibration gas concentration Use and to move the cursor left and right and use and to increment and decrement each digit Press to calibrate the NOx channel to the NOx calibration gas 9 Press to return to the Run screen The exact ...

Page 137: ...responses 4 Plot the analyzer responses versus the respective calculated NO and NOx concentrations and draw or calculate the respective calibration curves For subsequent calibrations where linearity can be assumed these curves may be checked with a three point calibration consisting of a zero point NO and NOx concentrations of approximately 80 of the URL and an intermediate concentration 5 Adjust ...

Page 138: ...M and any NO2 impurity Use to move the cursor left and right and use to increment and decrement the numeric character at the cursor Where NO2 OUT diluted NO2 concentration at the output manifold ppm NO ORIG original NO concentration prior to addition of O3 ppm NO REM NO concentration remaining after addition of O3 ppm 11 Press to calculate and save the new NO2 coefficient based on the entered span...

Page 139: ...tion for NO2 OUT concentrations and draw or calculate the NO2 calibration curve Note It is important that the curve should be linear within 1 FS over the NO2 range If the curve is nonlinear the analyzer is not operating correctly possible leak or converter failure etc and should be serviced Assuming the curve is linear subsequent data should be reduced using this NO2 calibration curve response Usi...

Page 140: ...ibration may be used for span levels less than a factor of 10 apart however if this is done to correct for a significant non linearity it may mask the problems causing the effect such as bad calibration cylinder leaks in sampling lines or low ozonator output Use the following procedures to calibrate the analyzer in dual or auto range mode Use the following procedure to set NO and NOx background re...

Page 141: ...NO full scale range 2 Allow the analyzer to sample the low NO calibration gas until the NO NO2 and NOx readings stabilize 3 When the responses are stabile from the Main Menu choose Calibration Calibrate Lo RNG NO 4 The Lo NO field displays the current NO concentration The Lo NO Span Conc field is where you enter the low NO calibration gas concentration Use to move the cursor left and right and use...

Page 142: ...ing 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 equivalent to about 80 of the URL of the low NO2 range The decrease must not exceed 90 of the low NO concentration determined in the Calibrate Low NOx procedure 2 From the Main Menu choose Calibration Calibrate...

Page 143: ... 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 Calibrate High NOx Use the following procedure to calibrate the NOx channel to the NOx calibration gas 1 Press to return to the Calibration menu...

Page 144: ... NO2 coefficient based 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 calibra...

Page 145: ...to the ZERO bulkhead in a Model 42i Low Source 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...

Page 146: ...Calibration Zero and Span Check 4 18 Model 42i Low Source Instruction Manual Thermo Electron Corporation ...

Page 147: ...n page 5 2 Ozonator Air Feed Drying Column 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 Safety Precautions Read the safety precautions before beginning any procedures in this chapter WARNING If the equipment is operated in a manner...

Page 148: ...the drying column to the DRY AIR bulkhead 4 Perform a Zero Span check see the Calibration chapter Capillaries Inspection and Replacement The capillaries normally only require inspection when instrument performance indicates that there may be a flow problem Use the following procedure to inspect and replace the capillaries This procedure can be used to check any or all of the capillaries 1 Turn the...

Page 149: ... Remove the glass capillaries 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 replaced only hand tight 9 Re install...

Page 150: ...ate 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 the instrument ON Fan Filters Inspection and Cleaning Use the following procedure to inspect and clean the fan filters 1 Remove the two fan guards from the fans and remove the filters 2 Flush the filters with warm wate...

Page 151: ...lacement in the Servicing chapter Equipment Required Pump Repair Kit Allen Wrench 3 mm Wrench 9 16 inch Needlenose Pliers 1 Turn instrument off unplug the power cord and remove the cover 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 For more information ab...

Page 152: ... Instruction Manual Thermo Electron Corporation Figure 5 2 Rebuilding the Pump 2 Loosen fittings and remove both lines going to the pump Top Plate Screws 4 Top Plate Flapper Valve Bottom Plate Clamping Disk Teflon Protection Wafer Diaphragm Diaphragm Mounting Disk ...

Page 153: ...op plate 5 Remove top plate flapper valve and bottom plate 6 Using needlenose pliers remove clamping disk holding diaphragm and Teflon protection wafer onto clamping rod and remove the diaphragm and Teflon wafer 7 Assemble pump by following above procedure in reverse Make sure not to over tighten clamping disk Be sure that the Teflon side of diaphragm faces up and that the flapper valves cover the...

Page 154: ...Preventive Maintenance Pump Rebuilding 5 8 Model 42i Low Source Instruction Manual Thermo Electron Corporation ...

Page 155: ...des some of the same information found in the Diagnostic menu however readings are updated every second in the service mode compared with every 10 seconds in the Diagnostics menu The Technical Support Department at Thermo Electron can also be consulted in the event of problems See Service Locations at the end of this chapter for contact information In any correspondence with the factory please not...

Page 156: ...uses Power supply Check voltages using a digital voltmeter Digital electronics Unplug power cord Check that all boards are seated properly Unplug power cord Remove one board Install known good board Repeat until faulty board is detected No output signal or very low output No sample gas reaching the analyzer Check input sample flow Blocked sample capillary Unplug power cord Clean or replace capilla...

Page 157: ... 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 high or too low Temperature should be approximately 325 C Low line voltage Check to see if line voltage is within specifications Molybdenum consum...

Page 158: ...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 voltage to the heater is 115 VAC Alarm Pressure High pressure indication Check the pump for a tear in the diaphragm replace with pump repair kit if necessary Refer to Preventive Maintenance chapter in this manual Check that capillaries are properly installed and O ring...

Page 159: ...ozone capillary 008 inch ID for blockage Replace as necessary 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 Table 6 2 Troubleshooting Alarm Messages continued Alarm Message Possible Cause Action ...

Page 160: ...lectronics 2 Pin P1 DIGITAL OUTPUTS 24V D C P O W E RSU P P LY MO TH E RBO AR D D IG ITALO U TP U T BO AR D I OE XP ANSIO N BO AR D J14 J3 FR 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 RS2...

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 INP U 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 H E 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 P E R MO V E N O P TIO NAL AC ...

Page 162: ...iptions Connector Label Reference Designator Pin Signal Descriptions INTF DATA J1 1 Ground 2 RS485 to Interface Board 3 RS485 to Interface Board 10 BASE T J2 1 Ethernet Output 2 Ethernet Output 3 Ethernet Input 4 NC 5 NC 6 Ethernet Input 7 NC 8 NC INTF DATA J1 1 Ground 2 RS485 to Interface Board 3 RS485 to Interface Board 10 BASE T J2 1 Ethernet Output 2 Ethernet Output 3 Ethernet Input 4 NC 5 NC ...

Page 163: ...t 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 14 Analog Voltage Output 1 15 Analog Voltage Output 3 16 Ground 17 Analog Voltage Output 5 18 Ground 19 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 Table 6 3 Motherboard Connector Pin Descri...

Page 164: ...age Output 4 35 Ground 36 Analog Voltage Output 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 Ground 5 Ground 6 Ground 7 SPI Reset 8 SPI Input 9 SPI Output 10 SPI 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 Table 6 3 Motherboard Connector Pin Descriptions continued Con...

Page 165: ...8 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 Signal 21 Keypad Row 2 Input Table 6 3 Motherboard Connector Pin Descriptions continued Connector Label ...

Page 166: ...nd 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 IN 9 NC RS232 RS485 B P1 B 1 NC 2 Serial Port 2 RX RS485 IN 3 Serial Port 2 TX RS485 OUT 4 NC 5 Ground 6 NC 7 Serial Port 2 RTS RS485 OUT 8 Serial Port 2 CTS RS485 IN 9 NC AC IN PJ1 1 AC HOT 2 AC NEUT Table 6 3 Mother...

Page 167: ... 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 5V 5 Ground 6 Measurement Frequency Output 7 Amplifier Zero Adjust Voltage 8 SPI Output 9 SPI Clock 10 SPI Board Select AMB TEMP MJ9 1 Ambient Temperature Thermistor 2 Ground HVPS MJ10 1 HV Power Supply Voltage Adjust 2 G...

Page 168: ...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 Output B 24V IN P1 1 24V 2 Ground PROV INPUT P2 1 Spare Voltage Input 2 Ground 3 Ground 4 Ground 5 Ground 6 Ground 7 Spare Frequency Input 8 Ground 9 Ground AC PUMP PJ1 1 AC HOT Table 6 4 Measurement Interface Board...

Page 169: ...EUT 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 SOL PJ13 1 24V 2 Spare 2 Solenoid Control PERM OVEN THERM POJ1 1 Perm Oven Gas Thermistor 2 Ground PERM OVEN POJ3 1 Perm Oven Heater On Off 2 15V_PWR 3 Perm Oven Thermistor 4 Ground Tab...

Page 170: ...al 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 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 Selec...

Page 171: ... LD2_5V LCD Signal 11 LD3_5V LCD Signal 12 LD4_5V LCD Signal 13 LD5_5V LCD Signal 14 LD6_5V LCD Signal 15 LD7_5V LCD Signal 16 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 Keypad Col 2 Select 7 Keypad Col 3 Select 8 Keypad Col 4 Select LCD BACKLIGHT J4 1 LCD Backlight Voltage 1 2 NC 3 NC 4 LCD Backlight Voltage 2 Tab...

Page 172: ...t 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 Output 4 22 Current Output Return 23 Current Outp...

Page 173: ...und 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 Contact a 10 Relay 10 Contact a 11 NC 12 Solenoid Drive Output 1 13 Solenoid Drive Output 2 14 Solenoid Drive Output 3 Table 6 6...

Page 174: ...act 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 Designator Pin Signal Description PMT IN J1 1 PMT Input 2 Ground INTF BD J2 1 15V 2 Ground 3 15V Table 6 7 Digital ...

Page 175: ...E 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 CONV TC J5 1 Converter Thermocouple TC 2 Converter Thermocouple TC SS TEMP J6 1 SS Tempera...

Page 176: ...hermo Electron Corporation Service Locations For additional assistance Thermo Electron has service available from exclusive distributors worldwide Contact one of the phone numbers below for product support and technical information 866 282 0430 Toll Free 508 520 0430 International ...

Page 177: ...ice mode includes some of the same information found in the Diagnostic menu however readings are updated every second in the service mode compared with every 10 seconds in the Diagnostics menu For additional service assistance 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 3 Fi...

Page 178: ...lacement on page 7 29 Analog Output Adjustment on page 7 32 Pressure Transducer Assembly Replacement on page 7 33 Pressure Transducer Calibration on page 7 35 Temperature Control Board Replacement on page 7 37 Ambient Temperature Calibration on page 7 37 Fuse Replacement on page 7 39 Scrubber Replacement on page 7 39 I O Expansion Board Optional Replacement on page 7 40 Digital Output Board Replac...

Page 179: ...e 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 protection provided by the equipment may be impaired CAUTION Carefully observe the instructions in each procedure Avoid contact with converter heated components Allow converter to cool to room temperature before handling converter co...

Page 180: ...mponents 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 module The polarizing plate is very fragile handle it carefully Do not wipe the polarizing plate with a dry cloth it may easily scrat...

Page 181: ...3 Processor Board 100533 00 Motherboard 100539 00 Digital Output Board 100542 00 I O Expansion Board Optional 100859 00 Front Panel Connector Board 100536 00 Measurement Interface Board 100856 00 Temperature Control Board 101167 00 Input Board Assembly 101076 00 Front Panel Display 9973 Ozonator Assembly 9974 Ozonator Transformer 101023 00 Pressure Transducer 101620 00 Flow Switch Ozone 9367 Photo...

Page 182: ...nal 4119 Capillary 0 008 inch red 4127 Capillary 0 015 inch purple 8630 Filter Guard Assembly w foam 6556 Optical Filter Assembly 101562 00 Terminal Block and Cable Kit DB25 101556 00 Terminal Block and Cable Kit DB37 Table 7 1 Model 42i Low Source Replacement Parts continued Part Number Description Table 7 2 Model 42i Low Source Cables Part Number Description 101346 00 Temperature Control 101355 ...

Page 183: ...00 Fan Power Cable Table 7 2 Model 42i Low Source Cables continued Part Number Description Power Supply PMT HVPS Thermistor Scrubber PMT Assembly Reaction Chamber Pump I O Expansion Digital Output Board Motherboard Converter Solenoid Flow Switch Ozonator Ozonator Transformer Pressure Transducer Input Board Board Optional Measurement Interface Board Silica Ammonia Scrubber Capillaries 2 ...

Page 184: ...rtition Panel The measurement bench can be removed and the partition panel can be lowered to improve access to connectors and components Refer to the following steps when a procedure requires lowering the partition panel see Figure 7 3 Figure 7 3 Remove the Measurement Bench Screws Loosen Captive Screw Pass Through Connectors Partition Panel Remove Screw Remove Screw Remove Screws REMOVE SCREWS ...

Page 185: ...ervicing Removing the Measurement Bench and Lowering the Partition Panel Thermo Electron Corporation Model 42i Low Source Instruction Manual 7 9 Figure 7 4 Slide Out the Measurement Bench SLIDE BENCH OUT ...

Page 186: ...Turn instrument OFF and unplug the power cord 2 If the instrument is mounted in a rack remove it from the rack 3 Remove the cover 4 Disconnect the plumbing connections at the rear of the measurement bench Remove Hidden Screw LOWER PANEL Equipment Damage Some internal components can be damaged by small amounts of static electricity A properly grounded antistatic wrist strap must be worn while handl...

Page 187: ...ove 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 bench by following previous steps in reverse Pump Replacement Use the following procedure to replace the pump see Figure 7 6 To rebuild the pump see Pump Rebuilding in the Preventive...

Page 188: ...ove the pump 5 Install new pump by following previous steps in reverse Fan Replacement Use the following procedure to replace the fan Figure 7 7 Equipment Required Fan Philips screwdriver 1 Turn instrument OFF unplug the power cord and remove the cover 2 Remove the fan guard from the fan and remove the filter Captive Screws 4 Equipment Damage Some internal components can be damaged by small amount...

Page 189: ...erse Figure 7 7 Replacing a Fan PMT Cooler and Reaction Chamber Assembly Replacement Use the following procedure to replace the PMT cooler and reaction chamber assembly see Figure 7 8 Equipment Required PMT cooler Wrench 7 16 inch Wrench 9 16 inch Nut driver 1 4 inch Philips screwdriver Wire cutters Equipment Damage Some internal components can be damaged by small amounts of static electricity A p...

Page 190: ...mperature control board from the board mounts 4 Remove the four screws securing the cooler shroud and remove the shroud Figure 7 8 PMT Cooler and Reaction Chamber 5 Disconnect plumbing connections from the reaction chamber 6 Disconnect the PMT cooler cables from the PMT high voltage power supply the input board and the measurement interface board Remove all tie wraps securing the cables Captive Sc...

Page 191: ...nstall the measurement bench Refer to Removing the Measurement Bench and Lowering the Partition Panel in this chapter Photomultiplier Tube Replacement Use the following procedure to replace the PMT tube Equipment Required Photomultiplier tube and PMT base Nut driver 5 16 inch Flat blade screwdriver Philips screwdriver small 1 Turn instrument OFF unplug the power cord and remove the cover 2 Disconn...

Page 192: ...ng it slightly back and forth 6 To install PMT follow previous steps in reverse making sure to backfill the cooler with dry air or nitrogen prior to replacing the PMT 7 Perform a photomultiplier tube calibration See Photomultiplier Tube Calibration in the Operation chapter PMT High Voltage Power Supply Replacement Use the following procedure to replace the PMT high voltage power supply Figure 7 10...

Page 193: ...ews securing the assembly bracket to the floor plate and slide the assembly towards the rear slightly and lift it off the base screws Figure 7 10 Replacing the PMT HVPS 4 Loosen two screws on the input box assembly and lift the input box assembly off the power supply Equipment Damage Some internal components can be damaged by small amounts of static electricity A properly grounded antistatic wrist...

Page 194: ...er to Range Menu in the Calibration chapter 2 Set the NO BKG and NOx BKG calibration factors to 0 0 Refer to Calibration Factors Menu in the Calibration chapter 3 Set the NO COEF NOx COEF and NO2 COEF to 1 000 4 Set the Averaging Time to 10 seconds Refer to Averaging Time in the Calibration chapter 5 Connect the calibration gas and allow the instrument to sample calibration gas until the reading s...

Page 195: ...t the Set PMT Voltage screen use to increment decrement the counts until the instrument displays the calibration gas concentration value Reaction Chamber Cleaning or Removal Use the following procedure to clean and or remove the reaction chamber see Figure 7 11 Equipment Required Allen Wrench 9 64 inch Wrench 7 16 inch Wrench 9 16 inch 1 Remove PMT cooler as described in PMT Cooler and Reaction Ch...

Page 196: ...er Figure 7 11 Cleaning or Removing the Reaction Chamber 3 Disconnect 1 4 inch fitting from the exhaust elbow on the front of the reaction chamber 4 Disconnect 1 8 inch fitting from 1 8 inch elbow at the bottom of the front of the reaction chamber 5 Remove the three socket head screws fastening front of reaction chamber to rear This exposes the inner surfaces of both sections of the PMT Cooler O R...

Page 197: ...steps in reverse making sure to backfill the cooler with dry air or nitrogen prior to installing reaction chamber 8 Re install the measurement bench Refer to Removing the Measurement Bench and Lowering the Partition Panel in this chapter NO2 to NO Converter Replacement Use the following procedure to replace the converter Figure 7 12 Equipment Required NO2 to NO Converter Wrench 7 16 inch Wrench 9 ...

Page 198: ...r from temperature control board 5 Loosen the four captive screws holding converter housing to floor plate Figure 7 12 NO2 to NO Moly Converter Assembly 6 Remove the six screws holding the top housing assembly to the bottom half 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 ...

Page 199: ... the solenoid valve Figure 7 13 Equipment Required Solenoid valve Wrench 5 16 inch Philips screwdriver 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 solenoid from the Measurement Interface board NO NOX connector Note electrical connections to facilitate re connection 3 Remove ...

Page 200: ...nator assembly Figure 7 14 Equipment Required Ozonator assembly Wrench 5 8 inch Philips screwdriver 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 Solenoid Valve Mounting Clip Equipment Damage Some internal co...

Page 201: ...g the ozonator to the ozonator bracket 5 Unplug the ozonator from the ozonator transformer by lifting the ozonator straight up 6 To install the ozonator follow the previous steps in reverse 7 Re install the measurement bench Refer to Removing the Measurement Bench and Lowering the Partition Panel in this chapter Ozonator Assembly Top View Ozonator Assembly Side View Captive Screws 4 Ozonator Brack...

Page 202: ...r to the measurement interface board OZONATOR connector 4 Remove the four screws holding the ozonator transformer to the ozonator bracket and remove the ozonator transformer 5 To install the ozonator transformer follow the previous steps in reverse 6 Re install the measurement bench Refer to Removing the Measurement Bench and Lowering the Partition Panel in this chapter Input Board Replacement Use...

Page 203: ... and lift the assembly off the screws 4 Loosen the two screws holding the input box to the assembly bracket and lift the input box off the screws Figure 7 15 Replacing the Input Board 5 Remove the four screws holding the input board to the input box and remove the input board 6 Install the input board by following the previous steps in reverse Equipment Damage Some internal components can be damag...

Page 204: ...rd Calibration screen appears If the Service Mode is not displayed on the Main Menu use the following procedure to display it a At the Main Menu press to scroll to Instrument Controls press to scroll to Service Mode and press The Service Mode screen appears b Press to toggle the Service Mode to ON c Press to return to the Main Menu d Continue the procedure at the beginning of Step 1 to access the ...

Page 205: ... Done Values Saved messages DC Power Supply Replacement Use the following procedure to replace the DC power supply Figure 7 16 Equipment Required DC power supply Philips screwdriver 1 Turn instrument OFF unplug the power cord and remove the cover 2 Disconnect all the power supply electrical connections Note connector locations to facilitate re connection Equipment Damage Some internal components c...

Page 206: ... DC power supply follow the previous steps in reverse Analog Output Testing The analog outputs should 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 voltage output channel and compare the meter reading with the output value set on the Test Analog Outputs screen Use the following procedur...

Page 207: ...ss to scroll to Diagnostics press to scroll to Test Analog Outputs and press The Test Analog Outputs screen appears 3 Press to scroll to the channel Voltage Channel 1 6 corresponding to the rear panel terminal pin where the meter is connected and press Table 7 3 Analog Output Channels and Rear Panel Pin Connections Channel Pin 1 14 2 33 3 15 4 34 5 17 6 36 Ground 16 18 19 35 37 ...

Page 208: ...analog outputs should be adjusted Refer to the Analog Output Adjustment procedure that follows Analog Output Adjustment Use the following procedure to adjust the analog voltage outputs if a meter reading in the Analog Output Testing procedure differed by more than one percent 1 Connect a meter to the channel to be adjusted Figure 7 17 shows the analog output pins and Table 7 3 identifies the assoc...

Page 209: ...n appears 4 With the cursor at Calibrate Zero press The Analog Output Cal line displays Zero 5 Use until the meter reads 0V then press to save the value 6 Press to return to the Analog Output Cal screen The Analog Output Cal screen appears 7 Press to select Calibrate Full Scale The Analog Output Cal Span screen appears 8 Use until the meter reads the value shown in the Set Output To line then pres...

Page 210: ...igure 7 18 Replacing the Pressure Transducer 4 Remove the two pressure transducer assembly retaining screws and remove the pressure transducer assembly 5 To install the pressure transducer assembly follow previous steps in reverse 6 Calibrate the pressure transducer Refer to the Pressure Transducer Calibration procedure that follows Equipment Damage Some internal components can be damaged by small...

Page 211: ... 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 3 From the Main Menu press to scroll to Service pr...

Page 212: ...he Pressure Sensor Cal screen 4 At the Pressure Sensor Cal screen press to select Zero The Calibrate Pressure Zero screen appears 5 Wait at least 10 seconds for the zero reading to stabilize then press to save the zero pressure value 6 Disconnect the pump from the pressure transducer 7 Press to return to the Pressure Sensor Cal screen 8 At the Pressure Sensor Cal screen press to select Span The Ca...

Page 213: ...ear and the yellow wire is towards the front 3 Snap off the board from the board mounts 4 To install the temperature control board follow previous steps in reverse Ambient Temperature Calibration Use the following procedure to calibrate the ambient internal temperature for the instrument Equipment Required Calibrated thermometer or 10K 1 Resistor Equipment Damage Some internal components can be da...

Page 214: ... 3 From the Main Menu press to scroll to Service press to scroll to Temperature Calibration and press The Calibrate Ambient Temperature screen appears If the Service Mode is not displayed on the Main Menu use the following procedure to display it a At the Main Menu press to scroll to Instrument Controls press to scroll to Service Mode and press The Service Mode screen appears b Press to toggle the...

Page 215: ...ctor 3 If either fuse is blown replace both fuses 4 Insert fuse drawer and reconnect power cord Scrubber Replacement Use the following procedure to replace the silica scrubber or ammonia scrubber Figure 7 19 Equipment Required Silica scrubber or Ammonia scrubber 1 Turn instrument OFF unplug the power cord and remove the cover 2 Unscrew the Teflon tubing at both ends of the scrubber 3 Pull the scru...

Page 216: ...se the following procedure to replace the optional I O expansion board Figure 7 20 Equipment Required I O expansion board Nut driver 3 16 inch 1 Turn instrument OFF unplug the power cord and remove the cover 2 Unplug the I O expansion board cable from the EXPANSION BD connector on the motherboard Silica Scrubber Ammonia Scrubber Mounting Clips Equipment Damage Some internal components can be damag...

Page 217: ...ar panel Figure 7 21 4 Pop off the board from the mounting studs and remove the board 5 To install the I O expansion board follow previous steps in reverse Figure 7 20 Replacing the I O Expansion Board Optional Figure 7 21 Rear Panel Board Connectors I O Expansion Board Opt Digital Output Board Motherboard Mounting Studs Motherboard Support Bracket Motherboard Digital Output Board I O Expansion Bo...

Page 218: ... 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 21 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 Motherboard Replacement Use the following procedure to replace the moth...

Page 219: ...tandoffs securing the board to the rear panel 6 Pop off the motherboard from motherboard support bracket and remove the motherboard 7 To install the motherboard follow previous steps in reverse Measurement Interface Board Replacement Use the following procedure to replace the measurement interface board Figure 7 22 Equipment Required Measurement interface board Philips screwdriver Equipment Damage...

Page 220: ...2 Unplug all connectors Note the locations of the connectors to facilitate reconnection 3 Pop off the measurement interface board from the four mounting studs and remove the board 4 To install the measurement interface board follow previous steps in reverse 5 Re install the measurement bench Refer to Removing the Measurement Bench and Lowering the Partition Panel in this chapter Figure 7 22 Replac...

Page 221: ... panel board 3 Pop off the board from the two top mounting studs and remove the board by lifting it up and off the slotted bottom support 4 Replace the front panel board by following previous steps in reverse Figure 7 23 Replacing the Front Panel Board and the LCD Module Equipment Damage Some internal components can be damaged by small amounts of static electricity A properly grounded antistatic w...

Page 222: ...ur 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 i...

Page 223: ...module out towards the right and rear of the instrument 5 Replace the LCD module by following previous steps in reverse Service Locations For additional assistance Thermo Electron has service available from exclusive distributors worldwide Contact one of the phone numbers below for product support and technical information 866 282 0430 Toll Free 508 520 0430 International ...

Page 224: ...Servicing Service Locations 7 48 Model 42i Low Source Instruction Manual Thermo Electron Corporation ...

Page 225: ...zer components Software on page 8 4 provides an overview of the software organization and detailed information on the software tasks Electronics on page 8 6 describes the system boards assemblies and connectors I O Components on page 8 9 describes the input and output communication functions and components Hardware Model 42i Low Source hardware components Figure 8 1 include NO2 to NO converter Mod...

Page 226: ...mode solenoid valve switches analyzer 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 Reaction Chamber The reaction chamber is where the sample reacts with ozone and produces excited NO2 that gives off a photon of energy when it decays Power Supply PM...

Page 227: ...or inlet completes an electrical safety circuit when air flows through the sensor to the ozonator If airflow stops the flow sensor breaks the electrical circuit to the ozonator and shuts it off to prevent the ozonator from overheating Photomultiplier Tube The Photomultiplier tube PMT provides the infrared sensitivity required to detect the NO2 luminescence resulting from the reaction of the ozone ...

Page 228: ...firmware that is bundled with the high level firmware and loaded on power up if a different version is detected Each board has a specific address that is used to identify to the firmware what functions are supported on that board This address is also used for the communications between the low level processors and the high level processor Every tenth of a second the frequency counters analog I O a...

Page 229: ...e previous five minutes This data is averaged over the selected time interval which can be any multiple of ten between 10 and 300 the manual modes have additional intervals of 1 2 and 5 seconds The background values for NO and NOx which are corrected for temperature are subtracted from their respective averages The NO reading is corrected by the stored span factor and by the temperature factor The...

Page 230: ...n hub for the instrument The motherboard receives operator inputs from the front panel mounted function key panel and or over I O connections 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 displ...

Page 231: ...ment Interface Board Connectors Connectors located on the measurement interface board include Data communication with the motherboard 24V and 120VAC power supply inputs Fans and solenoid outputs Cooler control 120VAC outputs for the pump and temperature control board Ozonator Pressure sensor Ambient temperature sensor Temperature control board PMT high voltage supply Measurement input board Permea...

Page 232: ...hermocouple or processor faults PMT Power Supply Assembly The PMT power supply produces high voltage to operate the photo multiplier tube used in the measurement system The output voltage is adjustable from approximately 600 to 1200 volts under software control Input Board Assembly The input board accepts the current signal from the PMT and converts it to a voltage which is scaled by a factor of a...

Page 233: ...on key panel and Graphics display It serves as central location to tie the three connectors required for the function key panel the graphics display control lines and the graphics display backlight to a single ribbon cable extending back to the motherboard This board also includes signal buffers for the graphics display control signals and a high voltage power supply for the graphics display backl...

Page 234: ...The current outputs are independent of the voltage outputs The current outputs are isolated from the instrument power and ground but they share a common return line Isolated GND Analog Voltage Inputs Optional The optional I O expansion board includes eight analog voltage inputs These inputs are used to gather measurement data from third party devices such as meteorological equipment The user may a...

Page 235: ...be configured for either RS 232 or RS 485 The serial baud rate is user selectable in firmware for standard speeds from 1200 to 19 200 baud The user can also set the data bits parity and stop bits The following protocols are supported C Link Streaming Data Modbus Slave The Streaming Data protocol transmits user selected measurement data via the serial port in real time for capture by a serial print...

Page 236: ... 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 External Accessory Connector The external accessory connector is not used in the Model 42i L...

Page 237: ...rmo Electron Corporation Model 42i Low Source Instruction Manual 8 13 This port is used in other models to communicate with smart external devices that may be mounted hundreds of feet from the analyzer using an RS 485 electrical interface ...

Page 238: ...System Description I O Components 8 14 Model 42i Low Source Instruction Manual Thermo Electron Corporation ...

Page 239: ...Assembly on page 9 3 Terminal Block and Cable Kits on page 9 3 Mounting Options on page 9 4 Internal Zero Span and Sample Valves With the zero span assembly option a source of span gas is connected to the SPAN port and a source of zero air is connected to the ZERO port as shown in Figure 9 1 Zero and span gas should be supplied at atmospheric pressure It may be necessary to use an atmospheric dump...

Page 240: ...o constantly replenish the ozonator air drying column as in the standard instrument If this option is installed refer to the Operation chapter for more information Teflon Particulate Filter A 5 10 micron pore size two inch diameter Teflon element is available for the Model 42i Low Source This filter should be installed just prior to the SAMPLE bulkhead When using a filter all calibrations and span...

Page 241: ...ut voltage range of 0V to 10VDC Six current outputs are provided with a normal operating range of 0 to 20 mA Terminal Block and Cable Kits The terminal block and cable kit provides a convenient way to connect devices to the analyzer The kit breaks out the signals on the rear panel connector to individual numbered terminals Two types of terminal block and cable kits are available One kit is for the...

Page 242: ...gure 9 3 through Figure 9 5 Figure 9 2 Rack Mount Option Assembly Table 9 1 Mounting Options Mounting Type Description Bench Positioned on bench includes mounting feet and front panel side trim ears EIA rack Mounted in an EIA style rack includes mounting slides and front panel EIA rack mounting ears Retrofit rack Mounted in a Thermo non EIA rack includes mounting slides and retrofit front panel ra...

Page 243: ...Optional Equipment Mounting Options Thermo Electron Corporation Model 42i Low Source Instruction Manual 9 5 Figure 9 3 Bench Mounting ...

Page 244: ...Optional Equipment Mounting Options 9 6 Model 42i Low Source Instruction Manual Thermo Electron Corporation Figure 9 4 EIA Rack Mounting ...

Page 245: ...Optional Equipment Mounting Options Thermo Electron Corporation Model 42i Low Source Instruction Manual 9 7 Figure 9 5 Retrofit Rack Mounting ...

Page 246: ...Optional Equipment Mounting Options 9 8 Model 42i Low Source Instruction Manual Thermo Electron Corporation ...

Page 247: ... third party supplier s warranty to the extent the same is assignable In no event shall Seller have any obligation to make repairs replacements or corrections required in whole or in part as the result of i normal wear and tear ii accident disaster or event of force majeure iii misuse fault or negligence of or by Buyer iv use of the Products in a manner for which they were not designed v causes ex...

Page 248: ...N THE EVENT OF A DEFECTIVE PRODUCT EXCEPT AS EXPRESSLY PROVIDED IN THIS SECTION 8 SELLER DISCLAIMS ALL WARRANTIES WHETHER EXPRESS OR IMPLIED ORAL OR WRITTEN WITH RESPECT TO THE PRODUCTS INCLUDING WITHOUT LIMITATION ALL IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE SELLER DOES NOT WARRANT THAT THE PRODUCTS ARE ERROR FREE OR WILL ACCOMPLISH ANY PARTICULAR RESULT ...

Page 249: ...Measurements on page B 9 describes and gives examples of the measurement commands Alarms on page B 12 describes and gives examples of the alarm commands Diagnostics on page B 16 describes and gives examples of the diagnostic commands Datalogging on page B 16 describes and gives examples of the datalogging commands Calibration on page B 23 describes and gives examples of the calibration commands Ke...

Page 250: ...change instrument parameters via remote However the command set mode remote can be sent to the analyzer to put it in the remote mode Report commands commands that don t begin with set can be issued either in the remote or local mode For information on changing modes see Chapter 3 Operation The commands can be sent in either uppercase or lowercase characters Each command must begin with the proper ...

Page 251: ...ntration alarm minimum value B 13 alarm conc nox min Reports sets current NOx concentration alarm maximum value B 13 alarm converter temp max Reports sets NO2 converter temperature alarm maximum value B 13 alarm converter temp min Reports sets NO2 converter temperature alarm minimum value B 13 alarm cooler temp max Reports sets PMT cooler temperature alarm maximum value B 14 alarm cooler temp min ...

Page 252: ...en saved B 16 clr records Clears away all logging records that have been saved B 16 clr srecs Clears away only short records that have been saved B 16 contrast Reports sets current screen contrast B 32 conv set temp Reports sets temperature setpoint for NO2 converter B 33 conv temp Reports current NO2 converter temperature B 10 cooler temp Reports temperature of PMT cooler same as PMT temperature ...

Page 253: ...decimal digits or flags that represent the status of the ozonator PMT gas mode and alarms B 11 format Reports sets current reply termination format B 37 gas mode Reports current mode of sample zero or span B 310 gas unit Reports sets current gas units B 31 he help Simulates pressing help pushbutton B 26 high avg time Reports sets high range averaging time B 9 high no Reports NO concentration calcu...

Page 254: ...ers and variables B 42 list var din Reports list of digital input index numbers and variables B 42 list var dout Reports list of digital output index numbers and variables B 42 low avg time Reports sets low averaging time B 9 low no Reports NO concentration calculated with low range coefficients B 10 low no coef Reports sets low range NO coefficient B 24 low no gas Reports sets low range NO span g...

Page 255: ...ored in memory B 21 no of srec Reports sets number of short records stored in memory B 21 no2 Reports current NO2 concentration B 10 no2 coef Reports sets current NO2 coefficient B 24 no2 gas Reports sets NO2 span gas concentration B 25 nox Reports current NOx concentration B 10 nox bkg Reports sets current NOx background B 25 nox coef Reports sets current NOx coefficient B 24 nox gas Reports sets...

Page 256: ... B 35 sc screen C series legacy command that reports a generic response Use iscreen instead B 28 sp field Reports sets item number and name in scratch pad list B 22 span Sets zero span valves to span mode B 30 sr Reports last short record stored B 17 srec Reports maximum number of short records B 18 srec format Reports sets output format for short records ASCII or binary B 19 srec layout Reports c...

Page 257: ...ime is 300 seconds according to Table B 2 Send avg time Receive avg time 11 300 sec set avg time selection set high avg time selection set low avg time selection These commands set the averaging time high and low averaging times according to Table B 2 The example below sets the low range averaging time to 120 seconds Send set low avg time 8 Receive set low avg time 8 ok Table B 2 Averaging Times S...

Page 258: ...2 converter temperature The example below reports that the current converter temperature is 625 C Send conv temp Receive conv temp 625 deg C cooler temp This command reports the PMT cooler temperature The example below reports that the PMT cooler temperature is 2 8 C Send pmt temp Receive pmt temp 2 8 deg C internal temp This command reports the current internal instrument temperature The example ...

Page 259: ...e The example below reports that the current reaction chamber temperature is 49 0 C Send react temp Receive react temp 49 0 deg C flags This reports 8 hexadecimal digits or flags that represent status of the ozonator PMT pressure and temperature compensation status gas units gas mode and alarms To decode the flags each hexadecimal digit is converted to binary as shown in the Figure B 1 It is the b...

Page 260: ...r temperature 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 te...

Page 261: ...n 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 215 Send set alarm conc no max 215 Receive set alarm conc no max 215 ok alarm converter temp min alarm converter temp max These commands report the converter temperature alarm minimum and maximum value current settings The example below r...

Page 262: ... Receive set alarm cooler temp max 2 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 temp alarm min value set internal temp alarm ...

Page 263: ...g conc no2 alarm trig conc nox These commands report the NO NO2 and NOx concentrations alarm trigger action for minimum alarm current setting to either floor or ceiling The example below shows the NO concentration minimum alarm trigger to ceiling according to Table B 3 Send alarm trig conc no Receive alarm trig conc no 1 set alarm trig conc no value set alarm trig conc no2 value set alarm trig con...

Page 264: ...1 14 9 14 9 4 9 3 2 14 9 diag volt iob This command reports the diagnostic voltage measurements on the I O expansion board The sequence of voltages is Positive 24 positive 5 positive 3 3 and negative 3 3 Each voltage value is separated by a space Send diag volt iob Receive diag volt iob 24 1 4 9 3 2 3 2 Datalogging clr records This command will clear all long and short records that have been saved...

Page 265: ... list stream Receive list stream field index variable x x time 1 1 no 2 2 no2 3 3 nox 4 18 intt 5 25 pres er xy lr xy sr xy x 0 1 Reply termination format see set format format command y 0 1 2 Output format see set erec lrec srec format format command 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...

Page 266: ...ec lrec xxxx yy srec xxxx yy lrec aa bb oo pp qq yy srec aa bb oo pp qq yy xxxx the number of past records yy the number of records to return 1 to 10 aa hours 01 to 24 bb minutes 01 to 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 deter...

Page 267: ...onf 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 Converter Temperature ozonf Ozonator Flow pres Pressure erec format srec format lrec format These comman...

Page 268: ...ommands report the long and short records that can be stored with the current settings and the number of blocks reserved for long and short records To calculate the number of short records per block add 2 to the number of records and then divide by the number of blocks The example below shows that 7 blocks were reserved for long records and the maximum number of long records that can be stored in ...

Page 269: ...long and short records in percent of total memory Send malloc lrec Receive malloc lrec 10 set malloc lrec value set malloc srec value value 0 to 100 These commands set the percent of memory space allocated for long and short records to value where value is a floating point number representing percent The example below sets the memory allocation for long records to 10 Note Issuing these commands wi...

Page 270: ...ch pad is set to index number 13 which is for the variable NOx concentration Send sp field 5 Receive sp field 5 13 pres set sp field number value number 1 32 is the maximum number of fields in long and short record lists number 1 18 is for streaming data lists This command sets the scratch pad field number item number in scratch pad list to value where value is the index number of a variable in th...

Page 271: ...ream 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 stream time 0 Receive set stream time 0 ok Calibration set cal no coef set cal no2 coef set cal nox coef set cal high no coef set cal high no2 coef set cal high nox coef set cal low no coef set c...

Page 272: ...no bkg 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 the NO NO2 and NOx coefficients in single range mode or the high and low range coefficients in 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 coefficient is 1 000 Send no co...

Page 273: ...is 24 000 ppm Send low no gas Receive low no gas 2400E 1 ppm 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 gas value set low no gas value set low no2 gas value set low nox gas value These commands set the NO NO2 and NOx span gas concentrations used by the auto calibration routine to value where value is a floating point representatio...

Page 274: ...bration is 185 5 mmHg Send pres cal Receive pres cal 185 5 mmHg set pres cal This command automatically sets the current pressure as the calibration pressure The example below successfully sets the calibration pressure to 120 5 mmHg Send set pres cal 120 5 Receive set pres cal 120 5 ok set cal pres This command automatically sets the current pressure as the calibration pressure The example below s...

Page 275: ...e following c code will expand the incoming data 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 the last line in the BMP Void unpackDisplay void far tdib unsigned char far rlescreen int i j k unsigned char far sc4bpp sc2bpp s...

Page 276: ...e range mode or the high and low ranges in dual or auto range mode according to Table B 6 and B 7 If the mode is incorrect the instrument responds with can t wrong settings The example below reports that the NO range is set to 100 000 ppb extended ranges Send range no Receive range no 6 1000E 2 ppb set range no selection set range no2 selection set range nox selection set high range no selection s...

Page 277: ... 500 0 5 1 000 1 0 2 1 000 1 0 2 000 2 0 3 2 000 2 0 5 000 5 0 4 5 000 5 0 10 000 10 0 5 10 000 10 0 20 000 20 0 6 20 000 20 0 50 000 50 0 7 50 000 50 0 100 000 100 0 8 100 000 100 0 150 000 150 0 9 C1 C1 C1 C1 10 C2 C2 C2 C2 11 C3 C3 C3 C3 Table B 7 Extended Ranges Selection ppb ppm µg m3 mg m3 0 1 000 1 0 2 000 2 0 1 2 000 2 0 5 000 5 0 2 5 000 5 0 10 000 10 0 3 10 000 10 0 20 000 20 0 4 20 000 ...

Page 278: ...stom 1 range to 5550 ppb Send set custom 1 range 5550 Receive set custom 1 range 5550 ok range mode This command reports the current range mode Send range mode Receive range mode single set range mode mode This command sets the current range mode to single dual or auto The example below sets the range mode to single Send set range mode single Receive set range mode single ok gas mode This command ...

Page 279: ...measurement mode NO NOx NO NOx is active The example below reports that the measurement mode is set to NO Send meas mode Receive meas mode no set meas mode mode mode no nox no nox This command sets the instrument to NO NOx auto mode manual NO mode or manual NOx mode The example below sets the instrument to the manual NO mode Send set meas mode no Receive set meas mode no ok pres comp This command ...

Page 280: ...xample below turns temperature compensation off Send set temp comp off Receive set temp comp off ok Hardware Configuration contrast This command reports the screen s level of contrast The example below shows the screen contrast is 50 according to Table B 8 Send contrast Receive contrast 5 50 set contrast level This command sets the screen s level of contrast according to Table B 8 The example belo...

Page 281: ...25 C Send set conv set temp Receive set conv set temp 625 deg C ok date This command reports the current date The example below reports the date as December 1 2004 Send date Receive date 12 01 04 set date mm dd yy mm month dd day yy year This command sets the date of the analyzer s internal clock The example below sets the date to March 19 2005 Send set date 03 19 05 Receive set date 03 19 05 ok s...

Page 282: ...f The example below reports that the ozonator safety is on Send ozonator safety Receive ozonator safety on set ozonator safety onoff These commands set the ozonator safety on or off The example below sets the ozonator off Send set ozonator safety off Receive set ozonator safety off ok ozonator status This command reports the status of the ozonator and safety The example below reports that the ozon...

Page 283: ...4 hour time The example below reports that the internal time is 2 15 30 pm Send time Receive time 14 15 30 set time hh mm ss hh hours mm minutes ss seconds This command sets the internal clock 24 hour time The example below sets the internal time to 2 15 pm Note if seconds are omitted the seconds default to 00 Send set time 14 15 Receive set time 14 15 ok Communications Configuration addr dns This...

Page 284: ...p Receive addr ip 192 168 1 15 set addr ip address This command sets the analyzer s IP address where address consists of four numbers ranging from 0 255 inclusive separated by Send set addr ip 192 168 1 15 Receive set addr ip 192 168 1 15 ok addr nm This command reports the TCP IP netmask address Send addr nm Receive addr nm 255 255 255 0 set addr nm address This command sets the netmask address w...

Page 285: ...at DHCP is on Send dhcp Receive dhcp on set dhcp onoff These commands enables and disables the DHCP service by either on or off Changes to this parameter will only take effect when the analyzer is powered up The example below sets the DHCP service on Note When DHCP is set to on the user supplied addr gw addr dns addr ip and addr nm parameters are not used Send set dhcp on Receive set dhcp on ok fo...

Page 286: ...zer01 Receive set host name analyzer01 ok instr name This command reports the instrument name Send instr name Receive instr name NO NO2 NOx Analyzer NO NO2 NOx Analyzer instrument id This command reports the instrument id Send instrument id Receive instrument id 42 set instrument id value This command sets the instrument id to value where value is a decimal number between 0 and 127 inclusive Note ...

Page 287: ...ommand disables the stale layout layout change indicator that is attached to each response if the layout has changed Send set layout ack Receive set layout ack ok I O Configuration analog iout range channel This command reports the analog current output range setting for channels where channel must be between 1 and 6 inclusive The example below reports current output channel 4 to the 4 20 mA range...

Page 288: ...el This command reports the analog voltage output channel range where channel is between 1 and 6 inclusive according to Table B 11 Send analog vout range 2 Receive analog vout range 2 3 set analog vout range channel range This command sets analog voltage output channel to the range where channel is between 1 and 6 inclusive and range is set according to Table B 11 The example below sets channel 2 ...

Page 289: ...command assigns digital input channel 1 16 to activate the action indicated by index 1 35 when the input transitions to the designated state high or low Use list din var command to obtain the list of supported index values and corresponding actions Send set din 1 3 high Receive set din 1 3 high ok dout channel This command reports the index number and output variable and the active state assigned ...

Page 290: ...x or no nox for analog output digital 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 Table B 12 Default Output Assignment D to A Function Single Range Dual Range Auto Range 1 Voltage Output NO High NO High Low NO 2 Voltage Output NO2 High...

Page 291: ... is set to normally open Send relay stat Receive relay stat open Note if individual relays have been assigned different logic then the response would be a 4 digit hexadecimal string with the least significant byte LSB being relay no 1 For example Receive relay stat 0x0001 indicates relay no 1 is set to normally open logic all others are normally closed Receive relay stat 0x0005 indicates relay no ...

Page 292: ...ecifier used to parse a particular datum from the input stream will be strongly related to the specifier used to display it e g all of the floating point inputs will be displayed with an f output specifier and all of the integer inputs will be displayed with a d specifier Format Specifier for ASCII Responses The first line of the Layout response is the scanf like parameter list for parsing the fie...

Page 293: ... the appearance of the full panel The full instrument panel as it appears on the screen has two columns of lines Each line is composed of three major components 1 a text field 2 a value field and 3 a button None of these three components is required The text field contains statically displayed text The value field displays values which are parsed out of the response to a DATA ERec command It also ...

Page 294: ...nformation The value source is followed by optional alarm information indicated by a commercial at sign with a source indicator and a starting bit indicator All alarm information is presumed to be two bits long low and high The bitfield extraction is performed on the integer part of the source Typical alarm information would appear as 6 4 Translation Table Then there appears an optional translatio...

Page 295: ...mand which is to be sent to the instrument upon the completion of the button selection The command string should normally contain print style formatting to include the user input If a is present it indicates a command which is sent to the instrument upon successful completion of the button command to update the value field This is not currently used Examples Some examples n is the C syntax for an ...

Page 296: ...the value type is not important here because the value is being translated to an output string Once the bits have been extracted they are shifted down to the bit zero position Thus the possible values of this example will be 0 through 3 The translation list shows the words which correspond to each input value the zeroth value appearing first 0 local 1 remote etc The selection list shows that only ...

Page 297: ...his is achieved by using the supported MODBUS commands listed below For details of the Model 42i Low Source MODBUS Protocol specification see the following topics Serial Communication Parameters on page C 2 describes the parameters used to support MODBUS RTU protocol TCP Communication Parameters on page C 2 describes the parameters used for TCP connection Application Data Unit Definition on page C...

Page 298: ...US slave address is a single byte in length This is the same as the instrument ID used for C Link commands and can be between 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 impo...

Page 299: ... varies depending on the function For more description of these data fields see Function Codes below Error Check 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 Function Codes This section describes the various function codes t...

Page 300: ...t reflect the state of the actual relays in the instrument as the user may program these outputs for either active closed or open N Quantity of Outputs 8 if the remainder not equal to zero then N N 1 Here is an example of a request and response to read outputs 2 15 Request Function code 1 Byte 0x01 or 0x02 Starting Address 2 Bytes 0x0000 to maximum allowed by instrument Quantity of outputs 2 Bytes...

Page 301: ...s 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 reported as 32 bit IEEE standard 754 floating point format This uses 2 sequential registers least significant 16 bits first The request specifies the starting register address and the number of registers Regi...

Page 302: ...2 x N Register value N x 2 Bytes n N or N 1 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 Request Field Name Hex Function 0x03 Starting Address Hi 0x00 Starting Address Lo 0x09 No of Registers Hi 0x00 No of Registers Lo 0x04 Response Field Name Hex Function 0x03 Byte Count 0x06 Register va...

Page 303: ...tion 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 Here is an example of a request to write Coil 5 ON Request Function code 1 Byte 0x05 Output Address 2 Bytes 0x0000 to maximum allowed by instrument Output Value 2 Bytes 0x0000 or 0xFF00 Response Fun...

Page 304: ...i 00 Output Address Lo 05 Output Value Hi FF Output Value Lo 00 Table C 1 Read Coils for 42i Low Source 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 10 NOT USED 11 GEN ALARM 12 NO CONC MAX ALARM 13 NO CONC MIN ALARM 14 NO2 CONC MAX ALARM 15 NO2 CONC MIN ALARM 16 NOx CONC MAX ALARM 17 NOx CONC MIN ALARM 18 INT TEMP ALARM...

Page 305: ...ble C 2 Read Registers for 42i Low Source Register Number Variable 40001 40002 NO 40003 40004 NO2 40005 40006 NOx 40007 40008 NOT USED 40009 40010 NOT USED 40011 40012 LO NO 40013 40014 LO NO2 40015 40016 LO NOx 40017 40018 NOT USED 40019 40020 NOT USED 40021 40022 HI NO 40023 40024 HI NO2 40025 40026 HI NOx 40027 40028 NOT USED 40029 40030 NOT USED 40031 40032 RANGE NOx 40033 40034 NOT USED 40035...

Page 306: ... 40056 ANALOG IN 1 40057 40058 ANALOG IN 2 40059 40060 ANALOG IN 3 40061 40062 ANALOG IN 4 40063 40064 ANALOG IN 5 40065 40066 ANALOG IN 6 40067 40068 ANALOG IN 7 40069 40070 ANALOG IN 8 Table C 3 Write Coils for 42i Low Source Coil Number Action Triggered 101 ZERO MODE 102 SPAN MODE 103 NO MODE 104 NOx MODE 105 NOT USED 106 NOT USED 107 SET BACKGROUND 108 CAL TO LO SPAN 109 AOUTS TO ZERO 110 AOUT...

Page 307: ...sample 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 Low Source 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 ...

Page 308: ...Address 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 0x...

Page 309: ... 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 w...

Page 310: ... 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 311: ... 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 Expone...

Page 312: ...03 SP 1175 01 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 Low Source The 3 measuremen...

Page 313: ...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 Low Source 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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