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Thermo 42i Instruction Manual

Low source chemiluminescence no-no2-nox analyzer part number 102031-00
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Model 42i
Low Source
Instruction Manual
Chemiluminescence NO-NO
-NO
Analyzer
2
x
Part number 102031-00
30May2006

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Summary of Contents for Thermo 42i

  • Page 1 Model 42i Low Source Instruction Manual Chemiluminescence NO-NO Analyzer Part number 102031-00 30May2006...
  • Page 2 © 2005 Thermo Electron Corporation. All rights reserved. “Analyze. Detect. Measure. Control” 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...

  • Page 3: Weee Compliance

    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 at: www.thermo.com/WEEERoHS.
  • Page 4 WEEE Compliance WEEE Compliance Thermo Electron Corporation...

  • Page 5: Table Of Contents

    NO, NO , and NO Coefficients ........3-21 Calibration Pressure ............3-22 Calibration Menu ..............3-23 Calibrate NO and NO Background........3-24 Calibrate NO, NO , and NO Coefficients .......3-25 Calibrate Pressure...............3-26 Zero/Span Check ...............3-26 Thermo Electron Corporation Model 42i Low Source Instruction Manual...
  • Page 6 Alarms Menu ................3-73 Internal Temperature ............3-74 Chamber Temperature............3-75 Cooler Temperature............3-76 Converter Temperature............3-77 Pressure................3-78 Ozonator Flow..............3-79 Zero and Span Check............3-79 Zero and Span Auto Calibration ........3-80 NO, NO , and NO Concentration ........3-80 Model 42i Low Source Instruction Manual Thermo Electron Corporation...
  • Page 7 Zero and Span Check............4-16 Chapter 5 Preventive Maintenance ...............5-1 Safety Precautions ..............5-1 Replacement Parts..............5-2 Cleaning the Outside Case ............5-2 Ozonator Air Feed Drying Column Replacement ....5-2 Capillaries Inspection and Replacement ........5-2 Thermo Electron Corporation Model 42i Low Source Instruction Manual...
  • Page 8 Temperature Control Board Replacement......7-37 Ambient Temperature Calibration ........7-37 Fuse Replacement ..............7-39 Scrubber Replacement............7-39 I/O Expansion Board (Optional) Replacement .....7-40 Digital Output Board Replacement........7-42 Motherboard Replacement............7-42 Measurement Interface Board Replacement ......7-43 viii Model 42i Low Source Instruction Manual Thermo Electron Corporation...
  • Page 9 Analog Current Outputs (Optional) ........8-10 Analog Voltage Inputs (Optional) ........8-10 Digital Relay Outputs ............8-10 Digital Inputs..............8-11 Serial Ports .................8-11 RS-232 Connection ............8-11 RS-485 Connection ............8-12 Ethernet Connection............8-12 External Accessory Connector ..........8-12 Thermo Electron Corporation Model 42i Low Source Instruction Manual...
  • Page 10 Appendix C MODBUS Protocol ................C-1 Serial Communication Parameters ......... C-2 TCP Communication Parameters .......... C-2 Application Data Unit Definition .......... C-2 Function Codes..............C-3 MODBUS Commands Supported......... C-8 Appendix D Geysitech (Bayern-Hessen) Protocol...........D-1 Model 42i Low Source Instruction Manual Thermo Electron Corporation...
  • Page 11 Figures Figures Model 42i Low Source Flow Schematic ........1-3 Remove the Packing Material ..........2-2 Remove the Shipping Screws ...........2-2 Model 42i Low Source Rear Panel ...........2-4 Atmospheric Dump Bypass Plumbing ........2-4 42i Low Source Front Panel Display ........3-2 Front Panel Pushbuttons ............3-3 Flowchart of Menu-Driven Software ........3-5...
  • Page 12 Figures Rack Mount Option Assembly ..........9-4 Bench Mounting ..............9-5 EIA Rack Mounting ..............9-6 Retrofit Rack Mounting ............9-7 Flag Status ................B-12 Model 42i Low Source Instruction Manual Thermo Electron Corporation...
  • Page 13 Read Coils for 42i Low Source ..............C-8 Read Registers for 42i Low Source ............C-9 Write Coils for 42i Low Source ..............C-10 Operating Status for Model 42i Low Source ........... D-7 Error Status for Model 42i Low Source ........... D-7 Thermo Electron Corporation...
  • Page 14 Tables Model 42i Low Source Instruction Manual Thermo Electron Corporation...

  • Page 15: About This Manual

    • Chapter 9 “Optional Equipment” describes the optional equipment that can be used with this analyzer. • Appendix A “Warranty” provides a copy of the warranty statement. Thermo Electron Corporation Model 42i Low Source Instruction Manual...
  • Page 16 The hazard or unsafe practice could result in minor to moderate personal injury if the warning is ignored. Equipment Damage The hazard or unsafe practice could result in property damage if the warning is ignored. Model 42i Low Source Instruction Manual Thermo Electron Corporation...
  • Page 17 The service procedures in this manual are restricted to qualified service personnel only. The Model 42i Low Source is supplied with a three-wire grounding cord. Under no circumstances should this grounding system be defeated. CAUTION If the LCD panel breaks, do not to let the liquid crystal contact your skin or clothes.
  • Page 18 13 August 2005. Where 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 Thermo Electron Corporation Model 42i Low Source Instruction Manual xviii...

  • Page 19: Introduction

    The Model 42i Low Source Chemiluminescence NO-NO Analyzer combines proven detection technology, easy to use menu-driven software, and advanced diagnostics to offer unsurpassed flexibility and reliability. The Model 42i Low Source has the following features: • 320 x 240 graphics display •...

  • Page 20: Principle Of Operation

    For more information on servicing, see Chapter 7, “Servicing”. Principle of Operation The Model 42i Low Source operates on the principle that nitric oxide (NO) and ozone (O ) react to produce a characteristic luminescence with an intensity linearly proportional to the NO concentration.

  • Page 21: Specifications

    , and NO concentrations to the front panel display, the analog outputs, and also makes the data available over the serial or ethernet connection. Figure 1-1. Model 42i Low Source Flow Schematic Specifications Table 1-1. Model 42i Low Source Specifications Preset ranges 0-0.2, 0.5, 1, 2, 5, 10, 20, 50, 100 ppm...
  • Page 22 C-Link, MODBUS, and streaming data (all user selectable) Ethernet connection RJ45 connector for 10Mbs Ethernet connection, static or dynamic TCP/IP addressing In non condensing environments. Performance specifications based on operation in 15–35 °C range. 42i Low Source Instruction Manual Thermo Electron Corporation...

  • Page 23: Installation

    Equipment Damage Do not attempt to lift the instrument by the cover or other external fittings. Unpacking and The Model 42i Low Source is shipped complete in one container. If there is Inspection obvious damage to the shipping container when you receive the instrument, notify the carrier immediately and hold for inspection.

  • Page 24: Remove The Packing Material

    4. Remove the three shipping screws (Figure 2-2). Shipping Screws (3) 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. Model 42i Low Source Instruction Manual Thermo Electron Corporation...

  • Page 25: Setup Procedure

    “Operation” chapter for more information about the rear panel pin-outs. 5. Plug the instrument into an outlet of the appropriate voltage and frequency. WARNING The Model 42i Low Source is supplied with a three-wire grounding cord. Under no circumstances should this grounding system be defeated. Thermo Electron Corporation...

  • Page 26: Model 42I Low Source Rear Panel

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

  • Page 27: Startup

    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 described in the “Calibration” chapter. Thermo Electron Corporation Model 42i Low Source Instruction Manual...
  • Page 28 Installation Startup Model 42i Low Source Instruction Manual Thermo Electron Corporation...

  • Page 29: Operation

    • “Service Menu” page 3-82 describes service related menu items. • “Password” page 3-97 describes how to enter/change a password, lock and unlock the instrument. Thermo Electron Corporation Model 42i Low Source Instruction Manual...

  • Page 30: Display

    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 water.

  • Page 31: Pushbuttons

    ) move the cursor up, down, left, and right or = Left, Right change values and states in specific screens. = Enter is used to select a menu item, accept/set/save a change, and/or toggle on/off functions. Thermo Electron Corporation Model 42i Low Source Instruction Manual...

  • Page 32: Soft Keys

    DIAGS ALARM 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 instrument is turned on. This screen is displayed while the instrument is warming up and performing self-checks.

  • Page 34: Power-Up Screen

    Operation Software Overview Power-Up Screen The Power-Up screen is displayed on power up of the Model 42i Low Source. The Self-Test is displayed while the internal components are warming up and diagnostic checks are performed. Please wait while booting... Run Screen...

  • Page 35: Main Menu

    Run screen. XXLO WCONCENTRATIONXXLO 62.7 PPB 25.5 PPB 88.2 PPB SAMPLE 12:34 ALARMx MAIN MENU: >RANGE AVERAGING TIME CALIBRATION FACTORS CALIBRATION INSTRUMENT CONTROLS DIAGNOSTICS ALARMS RANGE DIAGS ALARM SERVICE PASSWORD Thermo Electron Corporation Model 42i Low Source Instruction Manual...

  • Page 36: Range Menu

    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. Model 42i Low Source Instruction Manual Thermo Electron Corporation...

  • Page 37: Pin-Out Of Rear Panel Connector In Single Range Mode

    Ground 16, 18, 19, 35, 37 Signal Ground Note All channels are user definable. If any customization has been made to the analog output configuration, the default selections may not apply. Thermo Electron Corporation Model 42i Low Source Instruction Manual...

  • Page 38: Dual Range Mode

    Dual range mode may be selected from the “Single/Dual/Auto Select” in the “Service Menu”, later in this chapter. Figure 3-5. Pin-Out of Rear Panel Connector in Dual Range Mode 3-10 Model 42i Low Source Instruction Manual Thermo Electron Corporation...

  • Page 39: Auto Range Mode

    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 0–20,000 ppb. Thermo Electron Corporation Model 42i Low Source Instruction Manual 3-11...

  • Page 40: Analog Output In Auto Range Mode

    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. 3-12 Model 42i Low Source Instruction Manual Thermo Electron Corporation...

  • Page 41: Pin-Out Of Rear Panel Connector In Auto Range Mode

    16, 18, 19, 35, 37 Signal Ground Note All channels are user definable. If any customization has been made to the analog output configuration, the default selections may not apply. Thermo Electron Corporation Model 42i Low Source Instruction Manual 3-13...

  • Page 42: Gas Units

    The only difference between the screens are the words “High” and “Low” to indicate which range is displayed. The example below shows the NO range screen in single mode. For more 3-14 Model 42i Low Source Instruction Manual Thermo Electron Corporation...

  • Page 43: Standard Ranges

    Table 3-5. Standard Ranges µg/m mg/m 1,000 1,000 2,000 2,000 5,000 5,000 10,000 10.0 10,000 10.0 20,000 20.0 20,000 20.0 50,000 50.0 50,000 50.0 100,000 100.0 100,000 100.0 150,000 150.0 Thermo Electron Corporation Model 42i Low Source Instruction Manual 3-15...

  • Page 44: Set Custom Ranges

    ) can be specified as a range. • In the Main Menu, choose Range > Set Custom Ranges. CUSTOM RANGES: >CUSTOM RANGE 1 255.6 CUSTOM RANGE 2 275.0 CUSTOM RANGE 3 1125.0 RANGE DIAGS ALARM 3-16 Model 42i Low Source Instruction Manual Thermo Electron Corporation...

  • Page 45: Averaging Time

    The following averaging times are available: 10, 20, 30, 60, 90, 120, 180, 240, and 300 seconds. Additional averaging times are available in Thermo Electron Corporation Model 42i Low Source Instruction Manual 3-17...

  • Page 46: Calibration Factors Menu

    To manually calibrate the instrument, see “NO and NO Backgrounds”, “NO, NO , and NO Span Coefficients”, and “Calibration Pressure” below. • In the Main Menu, choose Calibration Factors. 3-18 Model 42i Low Source Instruction Manual Thermo Electron Corporation...

  • Page 47: No And No Backgrounds

    The NO background correction is a value, expressed in the current gas units, that is subtracted from the NO reading to produce the NO reading that is displayed. Thermo Electron Corporation Model 42i Low Source Instruction Manual 3-19...
  • Page 48 In the Main Menu, choose Calibration Factors > NO or NO • Background. • to increment or decrement the proposed background value. Press • to save the new background. NO BACKGROUND: SET BKG TO: INC/DEC SAVE VALUE RANGE DIAGS ALARM 3-20 Model 42i Low Source Instruction Manual Thermo Electron Corporation...

  • Page 49: No, No , And No Coefficients

    Coef. • to increment or decrement the coefficient value. • Press to save the new coefficient. NO COEFFICIENT: 51.4 SET COEF TO: 1.000 ? INC/DEC SAVE VALUE RANGE DIAGS ALARM Thermo Electron Corporation Model 42i Low Source Instruction Manual 3-21...

  • Page 50: Calibration Pressure

    In the Main Menu, choose Service > Calibration Factors > Reset User Cal Defaults. • Press to warn user and enable restore with • to reset the calibration pressure reference value when pressed after 3-22 Model 42i Low Source Instruction Manual Thermo Electron Corporation...

  • Page 51: Calibration Menu

    For more information about calibration, see Chapter 4, “Calibration”. • In the Main Menu, choose Calibration. Thermo Electron Corporation Model 42i Low Source Instruction Manual 3-23...

  • Page 52: Calibrate No And No Background

    In the Main Menu, choose Calibration > Calibrate NO or NO Background. • Press to set the new reading to zero. NO BACKGROUND: CURRENTLY: 0.0 ? SET NO TO ZERO RANGE DIAGS ALARM 3-24 Model 42i Low Source Instruction Manual Thermo Electron Corporation...

  • Page 53: Calibrate No, No 2 , And No X Coefficients

    • Press to calculate and save the new coefficient based on the entered span concentration. CALIBRATE NO: 79.1 SPAN CONC: 00000801 MOVE CURSOR CHANGE VALUE SAVE RANGE DIAGS ALARM Thermo Electron Corporation Model 42i Low Source Instruction Manual 3-25...

  • Page 54: Calibrate Pressure

    >NEXT TIME 01Jan05 12:00 PERIOD HR TOTAL DURATION HR ZERO DURATION MIN SPAN DURATION MIN PURGE DURATION MIN ZERO/SPAN AVG SEC RANGE DIAGS ALARM ZERO CAL RESET SPAN CAL RESET ZERO/SPAN RATIO 3-26 Model 42i Low Source Instruction Manual Thermo Electron Corporation...
  • Page 55 • Press to save the period. ZERO/SPAN PERIOD: CURRENTLY: 024 HRS SET TO: HRS ? MOVE CURSOR CHANGE VALUE SAVE RANGE DIAGS ALARM Thermo Electron Corporation Model 42i Low Source Instruction Manual 3-27...
  • Page 56 300 seconds. • In the Main Menu, choose Calibration > Zero/Span Check > Zero/Span Avg Sec. • to scroll through a list of choices. • Press to save the averaging time. 3-28 Model 42i Low Source Instruction Manual Thermo Electron Corporation...
  • Page 57 • Press to save the ratio value. ZERO/SPAN RATIO: CURRENTLY: 1 :1 SET TO: 2 :1 ? CHANGE VALUE SAVE VALUE RANGE DIAGS ALARM Thermo Electron Corporation Model 42i Low Source Instruction Manual 3-29...

  • Page 58: Instrument Controls Menu

    As an additional safety precaution, a lit LED mounted on the measurement interface board indicates that the ozonator is on. • In the Main Menu, choose Instrument Controls > Ozonator. • Press to toggle and set the ozonator on or off. 3-30 Model 42i Low Source Instruction Manual Thermo Electron Corporation...

  • Page 59: Pmt Supply

    In the manual modes, additional averaging times of 1, 2, and 5 seconds are available from the Averaging Time screen. • In the Main Menu, choose Instrument Controls > Auto/Manual Mode. • to scroll through a list of choices. Thermo Electron Corporation Model 42i Low Source Instruction Manual 3-31...

  • Page 60: Datalogging Settings

    • In the Main Menu, choose Instrument Controls > Datalogging Settings > Select SREC/LREC. • to scroll through a list of choices. • Press to set record format. 3-32 Model 42i Low Source Instruction Manual Thermo Electron Corporation...
  • Page 61 The Number of Records screen is used to select the starting point to display the number of records back to view. • to increment or decrement the numeric value. • Press to set the starting record and continue to the record display screen. Thermo Electron Corporation Model 42i Low Source Instruction Manual 3-33...
  • Page 62 • 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. 3-34 Model 42i Low Source Instruction Manual Thermo Electron Corporation...
  • Page 63 • In the Main Menu, choose Instrument Controls > Datalogging Settings > Erase Log. • Press to erase all data. • Press to confirm erasure. Thermo Electron Corporation Model 42i Low Source Instruction Manual 3-35...
  • Page 64 FIELD 3 PRES FIELD 4 PMTT FIELD 5 INTT FIELD 6 CONVT FIELD 7 NONE RANGE DIAGS ALARM DATA IN LREC FIELD >CONCENTRATIONS OTHER MEASUREMENTS ANALOG INPUTS RANGE DIAGS ALARM 3-36 Model 42i Low Source Instruction Manual Thermo Electron Corporation...
  • Page 65 In the Main Menu, choose Instrument Controls > Datalogging Settings > Select Content > Select Field > Other Measurements. • to move the cursor up and down. • Press to select a new choice. Thermo Electron Corporation Model 42i Low Source Instruction Manual 3-37...
  • Page 66 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 choices, see “Select Content” above. 3-38 Model 42i Low Source Instruction Manual Thermo Electron Corporation...
  • Page 67 RESET LREC FORMAT AND ERASE LREC LOG FILE DATA? ERASE LREC LOG FILE DATA? RESET RESET ARE YOU SURE YOU WANT TO?x PRESS TO CONFIRM RESETXX RANGE DIAGS ALARM RANGE DIAGS ALARM Thermo Electron Corporation Model 42i Low Source Instruction Manual 3-39...
  • Page 68 Percentages between 0 and 100% are available in increments of 10. Changing this value results in log erasure for both short records and long records. 3-40 Model 42i Low Source Instruction Manual Thermo Electron Corporation...
  • Page 69 > Configure Datalogging > Data Treatment. • to scroll through a list of choices. • Press to set the data type. SET LREC DATA TYPE: CURRENTLY: SET TO: CHANGE VALUE SAVE RANGE DIAGS ALARM Thermo Electron Corporation Model 42i Low Source Instruction Manual 3-41...

  • Page 70: Communication Settings

    ID number if two or more of the same instrument are connected to one computer over the serial port. Valid Instrument ID numbers are from 0 to 127. The Model 42i Low Source has a default 3-42...
  • Page 71 • to scroll through a list of choices. • Press to save the new protocol. COMMUNICATION PROTOCOL: CURRENTLY: CLINK SET TO: STREAMING ? CHANGE VALUE SAVE VALUE RANGE DIAGS ALARM Thermo Electron Corporation Model 42i Low Source Instruction Manual 3-43...
  • Page 72 90, 120, 180, 240, and 300 seconds. • In the Main Menu, choose Instrument Controls > Communication Settings > Streaming Data Config > Interval. • to scroll through a list of choices. 3-44 Model 42i Low Source Instruction Manual Thermo Electron Corporation...
  • Page 73 The selected item is shown by “<--” after it. • In the Main Menu, choose Instrument Controls > Communication Settings > Streaming Data Config > Select Item > Other Measurements. Thermo Electron Corporation Model 42i Low Source Instruction Manual 3-45...
  • Page 74 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 > Communication Settings > RS-232/RS-485 Selection. 3-46 Model 42i Low Source Instruction Manual Thermo Electron Corporation...
  • Page 75 • In the Main Menu, choose Instrument Controls > Communication Settings > TCP/IP Settings > Use DCHP. • Press to toggle and set DHCP on or off. Thermo Electron Corporation Model 42i Low Source Instruction Manual 3-47...
  • Page 76 In the Main Menu, choose Instrument Controls > Communication Settings > TCP/IP Settings > Netmask. • to move and change the value of the netmask. • Press to save the new address. 3-48 Model 42i Low Source Instruction Manual Thermo Electron Corporation...
  • Page 77 • Press to save the new letter in the alpha table or save the new alpha page. Thermo Electron Corporation Model 42i Low Source Instruction Manual 3-49...

  • Page 78: I/O Configuration

    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. 3-50 Model 42i Low Source Instruction Manual Thermo Electron Corporation...
  • Page 79 • In the Main Menu, choose Instrument Controls > I/O Configuration > Output Relay Settings > Select Relay > Instrument State. CHOOSE SIGNAL TYPE: >ALARMS NON-ALARM RANGE DIAGS ALARM Thermo Electron Corporation Model 42i Low Source Instruction Manual 3-51...
  • Page 80 In the Main Menu, choose Instrument Controls > I/O Configuration > Output Relay Settings > Select Relay > Instrument State > Non-Alarm. • to scroll through a list of choices. • Press to save the new selection for the relay. 3-52 Model 42i Low Source Instruction Manual Thermo Electron Corporation...
  • Page 81 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 state open or closed. Thermo Electron Corporation Model 42i Low Source Instruction Manual 3-53...
  • Page 82 1-6, and current channels 1-6 (if the I/O expansion board option is installed). Configuration choices include selecting range, setting minimum/maximum values, and choosing signal to output. 3-54 Model 42i Low Source Instruction Manual Thermo Electron Corporation...
  • Page 83 • Press to save the new range. SELECT OUTPUT RANGE: SELECTED OUTPUT: V ALL CURRENTLY: 0-10V SET TO: 0-5V CHANGE VALUE SAVE RANGE DIAGS ALARM Thermo Electron Corporation Model 42i Low Source Instruction Manual 3-55...
  • Page 84 Internal Temp User-set alarm min value User-set alarm max value Chamber Temp User-set alarm min value User-set alarm max value Cooler Temp User-set alarm min value User-set alarm max value 3-56 Model 42i Low Source Instruction Manual Thermo Electron Corporation...
  • Page 85 Internal Temp Analog Input 1 (single/auto range mode) Chamber Temp Analog Input 2 (single/auto range mode) Cooler Temp Analog Input 3 LO NO (dual mode) Converter Temp Analog Input 4 Thermo Electron Corporation Model 42i Low Source Instruction Manual 3-57...
  • Page 86 CHANNEL 3 CHANNEL 4 CHANNEL 5 CHANNEL 6 CHANNEL 7 RANGE DIAGS ALARM ANALOG INPUT 01 CONFIG: >DESCRIPTOR UNITS DECIMAL PLACES TABLE POINTS POINT 1 POINT 2 RANGE DIAGS ALARM 3-58 Model 42i Low Source Instruction Manual Thermo Electron Corporation...
  • Page 87 Analog Input Config > Select Channel > Units. • Press to save the new value. ANALOG INPUT UNITS: CURRENTLY: V ABCDEFGHIJKLMN BKSP OPQRSTUVWXYZ PAGE 0123456789 ./- SAVE RANGE DIAGS ALARM Thermo Electron Corporation Model 42i Low Source Instruction Manual 3-59...
  • Page 88 • to move the cursor up and down. • Press to save the new value. NUMBER OF TABLE POINTS: CURRENTLY: SET TO: 10 ? INC/DEC SAVE VALUE RANGE DIAGS ALARM 3-60 Model 42i Low Source Instruction Manual Thermo Electron Corporation...
  • Page 89 • Press to save the new value. TABLE POINT 01 VOLTS: CURRENTLY: 0.00 SET TO: 00.00 MOVE CURSOR CHANGE VALUE SAVE RANGE DIAGS ALARM Thermo Electron Corporation Model 42i Low Source Instruction Manual 3-61...

  • Page 90: Temperature Compensation

    Model 42i Low Source does not require temperature compensation for EPA equivalency. When temperature compensation is on, the display shows the current internal instrument temperature (measured by a thermistor on the Interface board).

  • Page 91: Pressure Compensation

    This empirical data is used to compensate for any change in reaction chamber pressure. This compensation can be used even though the Model 42i Low Source does not require pressure compensation for EPA equivalency.

  • Page 92: Screen Contrast

    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 prevents remote operation.

  • Page 93: Date/Time

    In the Main Menu, choose Diagnostics. DIAGNOSTICS: >PROGRAM VERSION VOLTAGES TEMPERATURES PRESSURE FLOW ANALOG INPUT READINGS ANALOG INPUT VOLTAGES RANGE DIAGS ALARM DIGITAL INPUTS RELAY STATES TEST ANALOG OUTPUTS INSTRUMENT CONFIGURATION CONTACT INFORMATION Thermo Electron Corporation Model 42i Low Source Instruction Manual 3-65...

  • Page 94: Program Version

    Motherboard Voltages The Motherboard screen (read only) is used to display the current voltage readings on the motherboard. • In the Main Menu, choose Diagnostics > Voltages > Motherboard Voltages. 3-66 Model 42i Low Source Instruction Manual Thermo Electron Corporation...
  • Page 95 In the Main Menu, choose Diagnostics > Voltages > I/O Board Voltages. I/O BOARD VOLTAGES: 3.3 SUPPLY 3.3 V 5.0 SUPPLY 5.0 V 15 0 SUPPLY 15.0 V 24.0 SUPPLY 24.0 V -3.0 SUPPLY -3.0 V RANGE DIAGS ALARM Thermo Electron Corporation Model 42i Low Source Instruction Manual 3-67...

  • Page 96: Temperatures

    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 Diagnostics > Flow. 3-68 Model 42i Low Source Instruction Manual Thermo Electron Corporation...

  • Page 97: Analog Input Readings

    4.28 V ANALOG IN 3 0.00 V ANALOG IN 4 0.00 V ANALOG IN 5 0.00 V ANALOG IN 6 0.00 V ANALOG IN 7 0.00 V RANGE DIAGS ALARM Thermo Electron Corporation Model 42i Low Source Instruction Manual 3-69...

  • Page 98: Digital Inputs

    (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. 3-70 Model 42i Low Source Instruction Manual Thermo Electron Corporation...
  • Page 99 • Press to select a choice. SET ANALOG OUTPUTS: SETTING: OUTPUT SET TO: NORMAL SET TO FULL SCALE SET TO ZERO RESET TO NORMAL RANGE DIAGS ALARM Thermo Electron Corporation Model 42i Low Source Instruction Manual 3-71...

  • Page 100: Instrument Configuration

    Contact Information The Contact Information screen displays the customer service information. In the Main Menu, choose Diagnostics > Contact Information. • CONTACT INFORMATION: CALL CENTER: 508-520-0430 WEB: WWW.THERMO.COM RANGE DIAGS ALARM 3-72 Model 42i Low Source Instruction Manual Thermo Electron Corporation...

  • Page 101: Alarms Menu

    COOLER TEMP CONVERTER TEMP PRESSURE OZONATOR FLOW RANGE DIAGS ALARM ZERO CHECK SPAN CHECK ZERO AUTOCAL SPAN AUTOCAL NO CONCENTRATION NO2 CONCENTRATION NOx CONCENTRATION MOTHERBOARD STATUS INTERFACE STATUS I/O EXP STATUS Thermo Electron Corporation Model 42i Low Source Instruction Manual 3-73...

  • Page 102: Internal Temperature

    • Press to save set to value as actual value. INTERNAL TEMPERATURE: ACTUAL MIN: 15.0 SET MIN TO: 16.0 INC/DEC SAVE VALUE RANGE DIAGS ALARM 3-74 Model 42i Low Source Instruction Manual Thermo Electron Corporation...

  • Page 103: Chamber Temperature

    • Press to save set to value as actual value. CHAMBER TEMPERATURE: ACTUAL MIN: 47.0 SET MIN TO: 48.0 INC/DEC SAVE VALUE RANGE DIAGS ALARM Thermo Electron Corporation Model 42i Low Source Instruction Manual 3-75...

  • Page 104: Cooler Temperature

    • Press to save set to value as actual value. COOLER TEMPERATURE: ACTUAL MIN: -10.0 SET MIN TO: -9.0 INC/DEC SAVE VALUE RANGE DIAGS ALARM 3-76 Model 42i Low Source Instruction Manual Thermo Electron Corporation...

  • Page 105: Converter Temperature

    • Press to save set to value as actual value. CONVERTER TEMPERATURE: ACTUAL MIN: 600.0 SET MIN TO: 610.0 INC/DEC SAVE VALUE RANGE DIAGS ALARM Thermo Electron Corporation Model 42i Low Source Instruction Manual 3-77...

  • Page 106: Pressure

    • Press to save set to value as actual value. PRESSURE: ACTUAL MIN: 100.0 mmHg SET MIN TO: 110.0 mmHg? INC/DEC SAVE VALUE RANGE DIAGS ALARM 3-78 Model 42i Low Source Instruction Manual Thermo Electron Corporation...

  • Page 107: Ozonator Flow

    The Max Zero Check Offset screen is used to change the maximum zero check offset. The maximum zero and span offset screens function the same way. • In the Main Menu, choose Alarms > Zero or Span Check > Max Offset. Thermo Electron Corporation Model 42i Low Source Instruction Manual 3-79...

  • Page 108: Zero And Span Auto Calibration

    Run screen and in the Main Menu. The NO and NO Concentration screens function the same way. • In the Main Menu, choose Alarms > NO, NO or NO Concentration. 3-80 Model 42i Low Source Instruction Manual Thermo Electron Corporation...
  • Page 109 (alarm is triggered when the concentration goes above the minimum value). • In the Main Menu, choose Alarms > Select Concentration > MinTrigger. • Press to toggle and set to floor or ceiling. Thermo Electron Corporation Model 42i Low Source Instruction Manual 3-81...

  • Page 110: Service Menu

    CONVERTER SET TEMP PRESSURE CALIBRATION INPUT BOARD CALIBRATION TEMPERATURE CALIBRATION ANALOG OUT CALIBRATION RANGE DIAGS ALARM ANALOG INPUT CALIBRATION OZONATOR SAFETY EXTENDED RANGES DILUTION RATIO DISPLAY PIXEL TEST RESTORE USER DEFAULTS 3-82 Model 42i Low Source Instruction Manual Thermo Electron Corporation...

  • Page 111: Pmt Voltage Adjustment

    “Service Mode” earlier in this chapter. • In the Main Menu, choose Service > Range Mode Select. • to scroll through a list of choices. • Press to save the new range mode. Thermo Electron Corporation Model 42i Low Source Instruction Manual 3-83...

  • Page 112: Converter Set Temperature

    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 this chapter. 3-84 Model 42i Low Source Instruction Manual Thermo Electron Corporation...
  • Page 113 CONNECT VACUUM PUMP AND SAVE ZERO PRESSURE RANGE DIAGS ALARM Calibrate Pressure Span The Calibrate Pressure Span screen allows the user to view and set the pressure sensor calibration span point. Thermo Electron Corporation Model 42i Low Source Instruction Manual 3-85...
  • Page 114 RESTORE DEFAULT CAL: RESTORE DEFAULT CAL: RESTORE RESTORE ARE YOU SURE YOU WANT TO?x PRESS TO CONFIRM RESTORE RANGE DIAGS ALARM RANGE DIAGS ALARM 3-86 Model 42i Low Source Instruction Manual Thermo Electron Corporation...

  • Page 115: Input Board Calibration

    10 and 100. • to increment or decrement the D/A counts so the frequency at gain 100 is equal to the frequency at gain 1. Thermo Electron Corporation Model 42i Low Source Instruction Manual 3-87...
  • Page 116 ** IN PROGRESS ** 2047 XXXXXX** WARNING **XXXXXXX THIS ACTION MAY REQUIREXX TARGET = FREQ RECALIBRATION OF THEXXXX ZERO 0 CNT = ENTIRE MEASUREMENT SYSTEM! RANGE DIAGS ALARM RANGE DIAGS ALARM 3-88 Model 42i Low Source Instruction Manual Thermo Electron Corporation...

  • Page 117: Temperature Calibration

    WARNING This adjustment should only be performed by an instrument service technician. • In the Main Menu, choose Service > Temperature Calibration. • to move and change the value. • Press to save set to value as actual value. Thermo Electron Corporation Model 42i Low Source Instruction Manual 3-89...

  • Page 118: Analog Output Calibration

    VOLTAGE CHANNEL 2 VOLTAGE CHANNEL 3 VOLTAGE CHANNEL 4 VOLTAGE CHANNEL 5 VOLTAGE CHANNEL 6 CURRENT CHANNEL 1 RANGE DIAGS ALARM ANALOG OUTPUT CAL: >CALIBRATE ZERO CALIBRATE FULL SCALE RANGE DIAGS ALARM 3-90 Model 42i Low Source Instruction Manual Thermo Electron Corporation...
  • Page 119 Press to save the value. ANALOG OUTPUT CAL: SPAN CONNECT METER TO OUTPUT! SELECTED OUTPUT: SET TO: 3697 ? SAVE VALUE INC/DEC SET OUTPUT TO: 10 V RANGE DIAGS ALARM Thermo Electron Corporation Model 42i Low Source Instruction Manual 3-91...

  • Page 120: Analog Input Calibration

    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. 3-92 Model 42i Low Source Instruction Manual Thermo Electron Corporation...
  • Page 121 • Press to save the value. ANALOG INPUT CAL: SPAN PROVIDE VOLTAGE TO INPUT! SELECTED INPUT: INPUT 1 CURRENTLY: 6.24 V SET TO: 10.00 CALIBRATE TO VALUE RANGE DIAGS ALARM Thermo Electron Corporation Model 42i Low Source Instruction Manual 3-93...

  • Page 122: Ozonator Safety

    In the Main Menu, choose Service > Extended Ranges. • Press to toggle and set the extended ranges on or off. EXTENDED RANGES: CURRENTLY: SET TO: ON ? TOGGLE VALUE RANGE DIAGS ALARM 3-94 Model 42i Low Source Instruction Manual Thermo Electron Corporation...

  • Page 123: Dilution Ratio

    DISPLAY PIXEL TEST: DURING TEST PRESS TO EXIT, TOGGLEXXXXXX BEGIN TEST GO BACK TO MENU RANGE DIAGS ALARM Thermo Electron Corporation Model 42i Low Source Instruction Manual 3-95...

  • Page 124: Restore User Defaults

    RESTORE USER DEFAULTS: RESTORE USER DEFAULTS: RESTORE RESTORE ARE YOU SURE YOU WANT TO?x PRESS TO CONFIRM RESTORE RANGE DIAGS ALARM RANGE DIAGS ALARM 3-96 Model 42i Low Source Instruction Manual Thermo Electron Corporation...

  • Page 125: Password

    In the Main Menu, choose Password > Set Password. • Press to enter password and disable instrument lock. ENTER NEW PASSWORD: ASSSSSSSSS ABCDEFGHIJKLMN BKSP OPQRSTUVWXYZ PAGE 0123456789 ./- SAVE RANGE DIAGS ALARM Thermo Electron Corporation Model 42i Low Source Instruction Manual 3-97...

  • Page 126: Lock Instrument

    • In the Main Menu, choose Password > Change Password. • Press to change password. ENTER NEW PASSWORD: ASSSSSSSSS ABCDEFGHIJKLMN BKSP OPQRSTUVWXYZ PAGE 0123456789 ./- SAVE RANGE DIAGS ALARM 3-98 Model 42i Low Source Instruction Manual Thermo Electron Corporation...

  • Page 127: Remove Password

    In the Main Menu, choose Password > Unlock Instrument. • Press to disable instrument lock and returns to main menu. ENTER THE PASSWORD: ASSSSSSSSS ABCDEFGHIJKLMN BKSP OPQRSTUVWXYZ PAGE 0123456789 ./- SAVE RANGE DIAGS ALARM Thermo Electron Corporation Model 42i Low Source Instruction Manual 3-99...
  • Page 128 Operation Password 3-100 Model 42i Low Source Instruction Manual Thermo Electron Corporation...

  • Page 129: Calibration

    Chapter 4 This chapter describes procedures for performing a calibration of the Model 42i Low Source. The information described here should be adequate to perform the calibration. However, if greater detail is desired, due to particular application requirements, the factory should be consulted.

  • Page 130: Calibration

    ZERO and SPAN ports should give identical responses to the sample port when test gases are introduced. The user should calibrate the Model 42i Low Source using the sample port to introduce the zero and span gas sources. After calibration, the zero and span sources...

  • Page 131: Connecting The Gpt Apparatus

    Calibration Calibration 42i Low Source, and then reintroduced to the instrument. The Model 42i Low Source should give identical responses to the test gases whether they are introduced via the sample port or the zero or span ports. If not, the plumbing and/or valves should be serviced.

  • Page 132: Gpt System

    Residence time of the reactant gases in the reaction chamber, min [NO] Concentration of the undiluted NO standard, ppm NO flow rate, sccm generator air flow rate, sccm Volume of the reaction chamber, cc Analyzer demand plus 10 to 50% excess Model 42i Low Source Instruction Manual Thermo Electron Corporation...
  • Page 133 3. Determine F 4. Select a convenient or available reaction chamber volume. Initially a trial volume may be selected in the range of 200 to 500 cc. 5. Compute F 2.75 Thermo Electron Corporation Model 42i Low Source Instruction Manual...

  • Page 134: Adjusting Instrument Gain

    “Dynamic Parameter Specifications for Gas Phase Titrator” earlier in this chapter. The total GPT airflow must exceed the total demand of the analyzer. The Model 42i Low Source requires approximately 700 cc/min of sample flow, and a total GPT airflow of at least 1.5 liters/min is recommended.
  • Page 135 6. Press to calculate and save the new NO coefficient based on the entered span concentration. Thermo Electron Corporation Model 42i Low Source Instruction Manual...
  • Page 136 Run screen. The exact NO concentration is calculated from: Where: = diluted NO concentration at the output manifold, ppm = concentration of NO impurity in the standard NO cylinder, ppm Model 42i Low Source Instruction Manual Thermo Electron Corporation...

  • Page 137: Preparing No, Nox, And No2 Calibration Curves

    NO concentration as [NO] ORIG 7. Adjust the O generator in the GPT system to generate sufficient O produce a decrease in the NO concentration equivalent to about 80% Thermo Electron Corporation Model 42i Low Source Instruction Manual...
  • Page 138 If the analyzer calculates a NO span coefficient of less than 0.96, either the entered NO concentration is incorrect, the converter is not being heated to the proper temperature, the instrument needs servicing (leak 4-10 Model 42i Low Source Instruction Manual Thermo Electron Corporation...
  • Page 139 Therefore never change any calibration factor without first recording the value so that after any troubleshooting procedure is completed, the initial value can be re-entered thereby not altering the multipoint calibration. Thermo Electron Corporation Model 42i Low Source Instruction Manual 4-11...

  • Page 140: Calibration In Dual Range And Auto Range Mode

    3. When the responses stabilize, from the Main Menu choose Calibration > Calibrate NO Background. 4. The Set NO Background screen displays the current NO background and NO concentration. 4-12 Model 42i Low Source Instruction Manual Thermo Electron Corporation...

  • Page 141: Calibrate Low No

    Calibrate Low NO Use the following procedure to calibrate the NO channel to the NO calibration gas. 1. Press to return to the Calibration menu and choose Calibrate Lo RNG NO Thermo Electron Corporation Model 42i Low Source Instruction Manual 4-13...
  • Page 142 4. Press to calculate and save the new low NO coefficient based on the entered span concentration. 4-14 Model 42i Low Source Instruction Manual Thermo Electron Corporation...

  • Page 143: Calibrate High No

    3. Press to calculate and save the new high NO coefficient based on the entered span concentration. 4. Press to return to the Run screen. Thermo Electron Corporation Model 42i Low Source Instruction Manual 4-15...
  • Page 144 You can adjust the frequency of calibration and even zero and span checks appropriately as you gain confidence with the instrument. 4-16 Model 42i Low Source Instruction Manual Thermo Electron Corporation...
  • Page 145 Use the following procedure to perform a zero and span check. 1. Connect the zero gas to the SAMPLE bulkhead in a standard instrument or to the ZERO bulkhead in a Model 42i Low Source equipped with the zero/span and sample solenoid valve option.
  • Page 146 Calibration Zero and Span Check 4-18 Model 42i Low Source Instruction Manual Thermo Electron Corporation...

  • Page 147: Preventive Maintenance

    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 about appropriate safety precautions, see the “Servicing” chapter. Thermo Electron Corporation Model 42i Low Source Instruction Manual...
  • Page 148 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 instrument OFF and unplug the power cord. 2. Remove the instrument cover. Model 42i Low Source Instruction Manual Thermo Electron Corporation...

  • Page 149: Inspecting And Replacing The Capillaries

    8. Replace Cajon® fitting. Note that the Cajon® fitting should be replaced only hand tight. 9. Re-install the cover. 10. Connect the power cord and turn the instrument ON. Thermo Electron Corporation Model 42i Low Source Instruction Manual...

  • Page 150: Thermoelectric Cooler Fins Inspection And Cleaning

    1. Remove the two fan guards from the fans and remove the filters. 2. Flush the filters with warm water and let dry (a clean, oil-free purge will help the drying process) or blow the filters clean with compressed air. Model 42i Low Source Instruction Manual Thermo Electron Corporation...

  • Page 151: Pump Rebuilding

    A properly grounded antistatic wrist strap must be worn while handling any internal component. For more information about appropriate safety precautions, see the “Servicing” chapter. 1. Turn instrument off, unplug the power cord, and remove the cover. Thermo Electron Corporation Model 42i Low Source Instruction Manual...

  • Page 152: Rebuilding The Pump

    Top Plate Flapper Valve Bottom Plate Clamping Disk Teflon Protection Wafer Diaphragm Diaphragm Mounting Disk Figure 5-2. Rebuilding the Pump 2. Loosen fittings and remove both lines going to the pump. Model 42i Low Source Instruction Manual Thermo Electron Corporation...
  • Page 153 8. Re-install the cover, reconnect the power cord, and turn instrument 9. Check that the reaction chamber pressure reads between 150 and 250 mm Hg. Thermo Electron Corporation Model 42i Low Source Instruction Manual...
  • Page 154 Preventive Maintenance Pump Rebuilding Model 42i Low Source Instruction Manual Thermo Electron Corporation...

  • Page 155: Chapter 6 Troubleshooting

    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.

  • Page 156: Troubleshooting Guides

    Defective ±15 volt Check supply voltages (Diagnostics Menu). Calibration drift Dryer to ozonator depleted Replace. Line voltage fluctuations Check to see if line voltage is within specifications. Defective pump Rebuild pump. Model 42i Low Source Instruction Manual Thermo Electron Corporation...

  • Page 157: Troubleshooting - Alarm Messages

    Check fan filter Clean or replace foam filter. Cooler reads 80 °C Bad unit Replace cooler. Cooler does not hold set point of -3 Replace cooler – °C thermoelectric module inside cooler failed. Thermo Electron Corporation Model 42i Low Source Instruction Manual...
  • Page 158 ID) for blockage. Replace as necessary. If using sample particulate filter make sure it is not blocked. Disconnect sample particulate filter from the sample bulkhead, if flow increases, replace the filter. Model 42i Low Source Instruction Manual Thermo Electron Corporation...
  • Page 159 , NO Concentration has exceeded range Check to insure range Conc. limit corresponds with expected value. If not select proper range. Concentration low Check user-defined low set point, set to zero. Thermo Electron Corporation Model 42i Low Source Instruction Manual...

  • Page 160: Board-Level Connection Diagrams

    3 Cond 2 Pin FRONT PANEL POWER SW TR ANSFO R ME R 3 Pin (90V AC or 240V AC O P TIO NS) Figure 6-1. Board-Level Connection Diagram - Common Electronics Model 42i Low Source Instruction Manual Thermo Electron Corporation...

  • Page 161: Board-Level Connection Diagram - Measurement System

    C O NV E R TE R TH E R MO C O U P LE 2 Pin 2 Pin 3 Pin P U MP 3 Pin Figure 6-2. Board-Level Connection Diagram - Measurement System Thermo Electron Corporation Model 42i Low Source Instruction Manual...

  • Page 162: Connector Pin Descriptions

    -RS485 to Interface Board 10-BASE-T Ethernet Output (+) Ethernet Output (-) Ethernet Input (+) Ethernet Input (-) EXPANSION BD +24V +24V Ground Ground Ground +RS485 to Expansion Board -RS485 to Expansion Board Model 42i Low Source Instruction Manual Thermo Electron Corporation...
  • Page 163 Analog Voltage Output 1 Analog Voltage Output 3 Ground Analog Voltage Output 5 Ground Ground Power Fail Relay COM Power Fail Relay N.O. Contact Ground TTL Input 3 TTL Input 4 TTL Input 6 Thermo Electron Corporation Model 42i Low Source Instruction Manual...
  • Page 164 Ground DIGITAL I/O +24V +24V Ground Ground Ground SPI Reset SPI Input SPI Output SPI Board Select SPI Clock EXT. RS485 -RS485 to Rear Panel +RS485 to Rear Panel Ground 6-10 Model 42i Low Source Instruction Manual Thermo Electron Corporation...
  • Page 165 LD1 – LCD Signal LD6 – LCD Signal LD2 – LCD Signal LD7 – LCD Signal LD3 – LCD Signal LCD Bias Voltage Ground Ground LCD_ONOFF – LCD Signal Keypad Row 2 Input Thermo Electron Corporation Model 42i Low Source Instruction Manual 6-11...
  • Page 166 P1:B Serial Port 2 RX (-RS485 IN) Serial Port 2 TX (-RS485 OUT) Ground Serial Port 2 RTS (+RS485 OUT) Serial Port 2 CTS (+RS485 IN) AC IN AC-HOT AC-NEUT 6-12 Model 42i Low Source Instruction Manual Thermo Electron Corporation...

  • Page 167: Measurement Interface Board Connector Pin Descriptions

    -15V Ground Measurement Frequency Output Amplifier Zero Adjust Voltage SPI Output SPI Clock SPI Board Select AMB TEMP Ambient Temperature Thermistor Ground HVPS MJ10 HV Power Supply Voltage Adjust Ground Thermo Electron Corporation Model 42i Low Source Instruction Manual 6-13...
  • Page 168 +15V_PWR OZONATOR Ozonator Output A Ozonator Output B 24V IN +24V Ground PROV INPUT Spare Voltage Input Ground Ground Ground Ground Ground Spare Frequency Input Ground Ground AC PUMP AC-HOT 6-14 Model 42i Low Source Instruction Manual Thermo Electron Corporation...
  • Page 169 Spare 1 Solenoid Control SPARE2 SOL. PJ13 +24V Spare 2 Solenoid Control PERM OVEN POJ1 Perm Oven Gas Thermistor THERM Ground PERM OVEN POJ3 Perm Oven Heater On/Off +15V_PWR Perm Oven Thermistor Ground Thermo Electron Corporation Model 42i Low Source Instruction Manual 6-15...

  • Page 170: Front Panel Board Connector Pin Diagram

    Keypad Row 1 Input Keypad Row 4 Input Keypad Row 3 Input Keypad Col 2 Select Keypad Col 1 Select Keypad Col 4 Select Keypad Col 3 Select Ground Ground Ground 6-16 Model 42i Low Source Instruction Manual Thermo Electron Corporation...
  • Page 171 Keypad Row 4 Input Keypad Col 1 Select Keypad Col 2 Select Keypad Col 3 Select Keypad Col 4 Select LCD BACKLIGHT LCD Backlight Voltage 1 LCD Backlight Voltage 2 Thermo Electron Corporation Model 42i Low Source Instruction Manual 6-17...

  • Page 172: I/O Expansion Board (Optional) Connector Pin Descriptions

    Current Output Return Current Output 3 Current Output Return Current Output 4 Current Output Return Current Output 5 Current Output Return Current Output 6 MOTHER BD +24V +24V Ground Ground Ground 6-18 Model 42i Low Source Instruction Manual Thermo Electron Corporation...

  • Page 173: Digital Output Board Connector Pin Descriptions

    Relay 6 Contact a Relay 7 Contact a Relay 8 Contact a Relay 9 Contact a Relay 10 Contact a Solenoid Drive Output 1 Solenoid Drive Output 2 Solenoid Drive Output 3 Thermo Electron Corporation Model 42i Low Source Instruction Manual 6-19...

  • Page 174: Input Board Connector Pin Descriptions

    +24V +24V +24V +24V +24V +24V +24V Table 6-8. Input Board Connector Pin Descriptions Connector Reference Signal Label Designator Description PMT IN PMT Input Ground INTF BD +15V Ground -15V 6-20 Model 42i Low Source Instruction Manual Thermo Electron Corporation...

  • Page 175: Temperature Control Board Connector Pin Descriptions

    CONVERTER Ground Converter Heater AC Output Converter Heater AC Return CONV TC Converter Thermocouple TC Converter Thermocouple TC+ SS TEMP SS Temperature Range Jumper A SS Temperature Range Jumper B Thermo Electron Corporation Model 42i Low Source Instruction Manual 6-21...

  • Page 176: Service Locations

    Troubleshooting Service Locations 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 6-22 Model 42i Low Source Instruction Manual...

  • Page 177: Chapter 7 Servicing

    Servicing Chapter 7 This chapter explains how to replace the Model 42i Low Source subassemblies. It assumes that a subassembly has been identified as defective and needs to be replaced. For fault location information refer to the “Preventive Maintenance” chapter and the “Troubleshooting” chapter in this manual.
  • Page 178 7-42 • “Motherboard Replacement” page 7-42 • “Measurement Interface Board Replacement” page 7-43 • “Front Panel Board Replacement” page 7-45 • “LCD Module Replacement” page 7-46 • “Service Locations” page 7-47 Model 42i Low Source Instruction Manual Thermo Electron Corporation...
  • Page 179 CAUTION Carefully observe the instructions in each procedure. Avoid contact with converter heated components. Allow converter to cool to room temperature before handling converter components. Thermo Electron Corporation Model 42i Low Source Instruction Manual...

  • Page 180: Properly Grounded Antistatic Wrist Strap

    LCD module, use a soft cloth moistened with a naphtha cleaning solvent. Do not place the LCD module near organic solvents or corrosive gases. Do not shake or jolt the LCD module. Figure 7-1. Properly Grounded Antistatic Wrist Strap Model 42i Low Source Instruction Manual Thermo Electron Corporation...

  • Page 181: Model 42I Low Source Replacement Parts

    Refer to the i-Port manual for the firmware update procedure. Replacement Parts Table 7-1 lists the replacement parts for the Model 42i Low Source major List subassemblies. Refer to Figure 7-2 to identify the component location.

  • Page 182: Cable List

    101556-00 Terminal Block and Cable Kit (DB37) Cable List Table 7-2 describes the Model 42i Low Source spare cables. See the “Troubleshooting” chapter for associated connection diagrams and board connector pin descriptions. Table 7-2. Model 42i Low Source Cables Part Number...

  • Page 183: Component Layout

    Servicing Cable List Table 7-2. Model 42i Low Source Cables, continued Part Number Description 101377-00 AC to Power Switch 102057-00 AC to External Pump 101267-00 Fan Power Cable Silica Reaction Converter PMT Assembly Scrubber Chamber Flow Switch Capillaries (2) Pressure Transducer...

  • Page 184: Removing The Measurement Bench And Lowering The Partition Panel

    (see and Lowering the Figure 7-3). Partition Panel Pass Through Connectors REMOVE SCREWS Remove Screw Partition Panel Loosen Captive Screw Remove Screws Remove Screw Figure 7-3. Remove the Measurement Bench Screws Model 42i Low Source Instruction Manual Thermo Electron Corporation...

  • Page 185: Slide Out The Measurement Bench

    Servicing Removing the Measurement Bench and Lowering the Partition Panel SLIDE BENCH OUT Figure 7-4. Slide Out the Measurement Bench Thermo Electron Corporation Model 42i Low Source Instruction Manual...

  • Page 186: Lower The Partition Panel

    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. 7-10 Model 42i Low Source Instruction Manual Thermo Electron Corporation...

  • Page 187: Pump Replacement

    A properly grounded antistatic wrist strap must be worn while handling any internal component. 1. Turn instrument OFF, unplug the power cord, and remove the cover. Thermo Electron Corporation Model 42i Low Source Instruction Manual 7-11...

  • Page 188: Fan Replacement

    1. Turn instrument OFF, unplug the power cord, and remove the cover. 2. Remove the fan guard from the fan and remove the filter. 7-12 Model 42i Low Source Instruction Manual Thermo Electron Corporation...

  • Page 189: Pmt Cooler And Reaction Chamber Assembly Replacement

    Wire cutters 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. Thermo Electron Corporation Model 42i Low Source Instruction Manual 7-13...

  • Page 190: 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. 7-14 Model 42i Low Source Instruction Manual Thermo Electron Corporation...

  • Page 191: Photomultiplier Tube Replacement

    BNC cable from the Input Board. 3. Remove six external screws holding PMT cover plate and the four screws holding the PMT shroud to the panel and remove the PMT Thermo Electron Corporation Model 42i Low Source Instruction Manual 7-15...

  • Page 192: Pmt High Voltage Power Supply Replacement

    7. Perform a photomultiplier tube calibration. See “Photomultiplier Tube Calibration” in the “Operation” chapter. PMT High Voltage Use the following procedure to replace the PMT high voltage power supply Power Supply (Figure 7-10). Replacement Equipment Required: 7-16 Model 42i Low Source Instruction Manual Thermo Electron Corporation...

  • Page 193: Replacing The Pmt Hvps

    Assembly Bracket Screws (2) Input Box Assembly 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. Thermo Electron Corporation Model 42i Low Source Instruction Manual 7-17...

  • Page 194: Pmt Voltage Adjustment

    PMT Voltage Adjustment > and press The Set PMT Voltage screen appears. If the Service Mode is not displayed on the Main Menu, use the following procedure to display it. 7-18 Model 42i Low Source Instruction Manual Thermo Electron Corporation...

  • Page 195: Reaction Chamber Cleaning Or Removal

    A properly grounded antistatic wrist strap must be worn while handling any internal component. 1. Remove PMT cooler as described in “PMT Cooler and Reaction Chamber Replacement” in this chapter. Thermo Electron Corporation Model 42i Low Source Instruction Manual 7-19...

  • Page 196: Cleaning Or Removing 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 7-20 Model 42i Low Source Instruction Manual Thermo Electron Corporation...

  • Page 197: No -To-No Converter Replacement

    Wrench, 9/16-inch Wrench, 1/2-inch Wrench, 5/8-inch Screwdriver Nut driver, 1/4-inch Nut driver, 5/16-inch CAUTION Avoid contact with converter heated components. Allow converter to cool to room temperature before handling converter components. Thermo Electron Corporation Model 42i Low Source Instruction Manual 7-21...
  • Page 198 Heater Connector Converter Bottom Housing Assembly Captive Screws (4) Figure 7-12. NO -to-NO Moly Converter Assembly 6. Remove the six screws holding the top housing assembly to the bottom half. 7-22 Model 42i Low Source Instruction Manual Thermo Electron Corporation...

  • Page 199: Solenoid Valve Replacement

    Note electrical connections to facilitate re-connection. 3. Remove plumbing from solenoid. Note plumbing connections to facilitate re-connection. 4. Pull solenoid valve from mounting clip. 5. To replace solenoid, follow above in reverse. Thermo Electron Corporation Model 42i Low Source Instruction Manual 7-23...

  • Page 200: Ozonator Assembly Replacement

    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. 7-24 Model 42i Low Source Instruction Manual Thermo Electron Corporation...

  • Page 201: Replacing The Ozonator Assembly

    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. Thermo Electron Corporation Model 42i Low Source Instruction Manual 7-25...

  • Page 202: Ozonator Transformer Replacement

    6. Re-install the measurement bench. Refer to “Removing the Measurement Bench and Lowering the Partition Panel” in this chapter. Input Board Use the following procedure to replace the input board (Figure 7-15). Replacement Equipment Required: Input board 7-26 Model 42i Low Source Instruction Manual Thermo Electron Corporation...

  • Page 203: 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. Thermo Electron Corporation Model 42i Low Source Instruction Manual 7-27...

  • Page 204: Input Board Calibration

    The screen displays the frequency at GAIN 1. 3. Make a note of the FREQ value displayed at GAIN 1, then press to change the GAIN to 100. 7-28 Model 42i Low Source Instruction Manual Thermo Electron Corporation...

  • Page 205: Dc Power Supply Replacement

    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. Thermo Electron Corporation Model 42i Low Source Instruction Manual 7-29...

  • Page 206: Analog Output Testing

    Use the following procedure to test the analog outputs. 1. Connect a meter to the channel to be tested. Figure 7-17 shows the analog output pins and Table 7-3 identifies the associated channels. 7-30 Model 42i Low Source Instruction Manual Thermo Electron Corporation...

  • Page 207: Rear Panel Analog Voltage Output Pins

    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 Thermo Electron Corporation Model 42i Low Source Instruction Manual 7-31...

  • Page 208: Analog Output Adjustment

    Instrument Controls > press > to scroll to Service Mode > and press The Service Mode screen appears. b. Press to toggle the Service Mode to ON. 7-32 Model 42i Low Source Instruction Manual Thermo Electron Corporation...

  • Page 209: Pressure Transducer Assembly Replacement

    Output To: line, then press to save the value. Pressure Transducer Use the following procedure to replace the pressure transducer assembly Assembly (Figure 7-18). Replacement Equipment Required: Pressure transducer assembly Thermo Electron Corporation Model 42i Low Source Instruction Manual 7-33...

  • Page 210: Replacing The Pressure Transducer

    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. 7-34 Model 42i Low Source Instruction Manual Thermo Electron Corporation...

  • Page 211: Pressure Transducer Calibration

    1 mm Hg. 3. From the Main Menu, press to scroll to Service > press > to scroll to Pressure Calibration > and press The Pressure Sensor Cal screen appears Thermo Electron Corporation Model 42i Low Source Instruction Manual 7-35...
  • Page 212 9. Wait at least 10 seconds for the ambient reading to stabilize, use to enter the known barometric pressure, and press to save the pressure value. 10. Reconnect the instrument tubing to the pressure transducer. 11. Install the cover. 7-36 Model 42i Low Source Instruction Manual Thermo Electron Corporation...

  • Page 213: Temperature Control Board Replacement

    WARNING The service procedures in this manual are restricted to qualified service representatives. If the equipment is operated in a manner not specified by the manufacturer, the protection provided by the equipment may be impaired. Thermo Electron Corporation Model 42i Low Source Instruction Manual 7-37...
  • Page 214 Continue the procedure at the beginning of Step 3 to access the Calibrate Ambient Temperature screen. 4. Wait at least 10 seconds for the ambient reading to stabilize, use to enter the known temperature, and press to save the temperature value. 7-38 Model 42i Low Source Instruction Manual Thermo Electron Corporation...

  • Page 215: Fuse Replacement

    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 scrubber off the mounting clips. Thermo Electron Corporation Model 42i Low Source Instruction Manual 7-39...

  • Page 216: I/O Expansion Board (Optional) Replacement

    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. 7-40 Model 42i Low Source Instruction Manual Thermo Electron Corporation...

  • Page 217: Replacing The I/O Expansion Board (Optional)

    Mounting Stud Motherboard Digital Output Board I/O Expansion Board (Opt) Figure 7-20. Replacing the I/O Expansion Board (Optional) I/O Expansion Board Motherboard Digital Output Board Figure 7-21. Rear Panel Board Connectors Thermo Electron Corporation Model 42i Low Source Instruction Manual 7-41...

  • Page 218: Digital Output Board Replacement

    6. To install the digital output board, follow previous steps in reverse. Motherboard Use the following procedure to replace the motherboard (Figure 7-20). Replacement Equipment Required: Motherboard Philips screwdriver 7-42 Model 42i Low Source Instruction Manual Thermo Electron Corporation...

  • Page 219: Measurement Interface Board Replacement

    Philips screwdriver Equipment Damage Some internal components can be damaged by small amounts of static electricity. A properly grounded antistatic wrist strap must be worn while handling any internal component. Thermo Electron Corporation Model 42i Low Source Instruction Manual 7-43...

  • Page 220: Replacing The Measurement Interface Board

    5. Re-install the measurement bench. Refer to “Removing the Measurement Bench and Lowering the Partition Panel” in this chapter. Mounting Studs (4) Measurement Interface Board Figure 7-22. Replacing the Measurement Interface Board 7-44 Model 42i Low Source Instruction Manual Thermo Electron Corporation...

  • Page 221: Front Panel Board Replacement

    Retaining Screw LCD Module Screws (2) Front Panel Board Mounting Studs (2) Ribbon Cables (3) Two-Wire Connector Bottom Support Figure 7-23. Replacing the Front Panel Board and the LCD Module Thermo Electron Corporation Model 42i Low Source Instruction Manual 7-45...

  • Page 222: Lcd Module Replacement

    1. Turn instrument OFF, unplug the power cord, and remove the cover. 2. Remove the two screws from right side of LCD module (viewed front front). 3. Disconnect the ribbon cable and the two-wire connector from the front panel board. 7-46 Model 42i Low Source Instruction Manual Thermo Electron Corporation...

  • Page 223: Service Locations

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

  • Page 225: System Description

    • “I/O Components” page 8-9 describes the input and output communication functions and components. Hardware Model 42i Low Source hardware components (Figure 8-1) include: • -to-NO converter • Mode solenoid • Reaction chamber •...

  • Page 226: No 2 -To-No Converter

    (NO mode). Reaction Chamber The reaction chamber is where the sample reacts with ozone and produces excited NO that gives off a photon of energy when it decays. Model 42i Low Source Instruction Manual Thermo Electron Corporation...

  • Page 227: Optical Filter

    Pump The vacuum pump draws the reacted gasses out of the reaction chamber. Sample Capillary The sample capillary along with the pump is used to control flow in the sample line. Thermo Electron Corporation Model 42i Low Source Instruction Manual...

  • Page 228: Dry Air Capillary

    The one-second accumulated counts representing the NO/NO accumulated and reported for the user-specified averaging time. If this averaging time is greater than ten seconds, the measurement is reported Model 42i Low Source Instruction Manual Thermo Electron Corporation...

  • Page 229: Measurement Calculations

    The defaults are calculated by dividing the data values by the full-scale range for each of the three parameters and then multiplying each result by the user-selected Thermo Electron Corporation Model 42i Low Source Instruction Manual...

  • Page 230: Electronics

    • I/O connector with Power Fail Relay, 16 Digital Inputs, and 6 Analog Voltage Outputs. Internal Connectors Internal connectors include: • Function key panel and Display • Measurement Interface Board Data Model 42i Low Source Instruction Manual Thermo Electron Corporation...

  • Page 231: Measurement Interface Board

    The pressure transducer output is produced by measuring the pressure difference between the sample gas pressure and ambient air pressure. Thermo Electron Corporation Model 42i Low Source Instruction Manual...

  • Page 232: Temperature Control Board

    Ten relay contacts normally open (with power off ) are provided which are electrically isolated from each other. Eight solenoid driver outputs (open collector) are provided along with a corresponding +24VDC supply pin on the connector. Model 42i Low Source Instruction Manual Thermo Electron Corporation...

  • Page 233: I/O Expansion Board (Optional)

    The instrument provides six analog voltage outputs. Each may be software configured for any one of the following ranges, while maintaining a minimum resolution of 12 bits: • 0-100mV • 0-1V • 0-5V • 0-10V Thermo Electron Corporation Model 42i Low Source Instruction Manual...

  • Page 234: Analog Current Outputs (Optional)

    The user may select what information is sent out each relay and whether the active state is opened or closed. 8-10 Model 42i Low Source Instruction Manual Thermo Electron Corporation...

  • Page 235: Digital Inputs

    Data Format: 1200, 2400, 4800, 9600, 19200, 38400, 57600, or 115200 BAUD 8 data bits Thermo Electron Corporation Model 42i Low Source Instruction Manual 8-11...

  • Page 236: Ethernet Connection

    DHCP server). Any serial port protocols may be accessed over Ethernet in addition to the serial port. External Accessory The external accessory connector is not used in the Model 42i Low Source analyzer. Connector 8-12 Model 42i Low Source Instruction Manual...
  • Page 237 I/O Components 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. Thermo Electron Corporation Model 42i Low Source Instruction Manual 8-13...
  • Page 238 System Description I/O Components 8-14 Model 42i Low Source Instruction Manual Thermo Electron Corporation...

  • Page 239: Chapter 9 Optional Equipment

    Optional Equipment Chapter 9 The Model 42i Low Source is available with the following options: • “Internal Zero/Span and Sample Valves” page 9-1 • “Permeation Dryer Assembly” page 9-2 • “Teflon Particulate Filter” page 9-2 • “Ozone Particulate Filter” page 9-2 •...

  • Page 240: Optional Equipment

    A 5-10 micron pore size, two-inch diameter Teflon® element is available for Filter the Model 42i Low Source. This filter should be installed just prior to the SAMPLE bulkhead. When using a filter, all calibrations and span checks must be performed through the filter.

  • Page 241: No -To-No Converters

    Optional Equipment NO2-to-NO Converters -to-NO Converters The Model 42i Low Source includes a Molybdenum NO -to-NO converter as standard equipment. A stainless steel converter is available as an option. I/O Expansion Board The I/O expansion board connects to the motherboard and adds the...

  • Page 242: Mounting Options

    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 rack-mounting ears. Figure 9-2. Rack Mount Option Assembly Model 42i Low Source Instruction Manual...

  • Page 243: Bench Mounting

    Optional Equipment Mounting Options Figure 9-3. Bench Mounting Thermo Electron Corporation Model 42i Low Source Instruction Manual...

  • Page 244: Eia Rack Mounting

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

  • Page 245: Retrofit Rack Mounting

    Optional Equipment Mounting Options Figure 9-5. Retrofit Rack Mounting Thermo Electron Corporation Model 42i Low Source Instruction Manual...
  • Page 246 Optional Equipment Mounting Options Model 42i Low Source Instruction Manual Thermo Electron Corporation...

  • Page 247: Appendix A Warranty

    PERSON OR ENTITY OTHER THAN SELLER WITHOUT SELLER'S PRIOR WRITTEN APPROVAL, OR ANY USE OF REPLACEMENT PARTS NOT SUPPLIED BY SELLER, SHALL IMMEDIATELY VOID AND CANCEL ALL WARRANTIES WITH RESPECT TO THE AFFECTED PRODUCTS. Thermo Electron Corporation 42i Low Source Instruction Manual...
  • Page 248 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. 42i Low Source Instruction Manual Thermo Electron Corporation...

  • Page 249: Appendix B C-Link Protocol Commands

    Appendix B This appendix provides a description of the C-Link protocol commands that can be used to remotely control a Model 42i Low Source analyzer using a host device such as a PC or a datalogger. C-Link protocol may be used over RS-232, RS-485, or Ethernet.

  • Page 250: Instrument Identification Number

    (ASCII) character. The command in the example below begins with the ASCII character code 170 decimal, which directs the command to the Model 42i Low Source, and is terminated by a carriage return “CR” (ASCII character code 13 decimal). <ASCII 170> T I M E <CR>...

  • Page 251: Commands

    C-Link Protocol Commands Commands Table B-1 lists the 42i Low Source C-Link protocol commands. The interface will respond to the command strings outlined below. Table B-1. C-Link Protocol Commands Command Description Page addr dns Reports/sets domain name server address B-35...
  • Page 252 Reports/sets current date B-33 default params Sets parameters to default values B-33 dhcp Reports/sets state of use of DHCP B-37 diag volt iob Reports diagnostic voltage level for I/O expansion board B-16 Model 42i Low Source Instruction Manual Thermo Electron Corporation...
  • Page 253 B-24 high nox gas Reports high range NO span gas concentration B-25 high range no Reports/selects current NO high range B-28 high range no2 Reports/selects current NO high range B-28 Thermo Electron Corporation Model 42i Low Source Instruction Manual...
  • Page 254 Reports/sets current NO low range B-28 low range nox Reports/sets current NO low range B-28 Outputs long records in the format specified in the command B-17 lrec Outputs long records B-18 Model 42i Low Source Instruction Manual Thermo Electron Corporation...
  • Page 255 Reports current PMT voltage B-11 pres Reports current reaction chamber pressure B-11 pres cal Reports/sets pressure used for calibration B-26 pres comp Reports/sets pressure compensation on or off B-31 Thermo Electron Corporation Model 42i Low Source Instruction Manual...
  • Page 256 Reports/sets a time stamp to streaming data or not B-23 temp comp Reports/sets temperature compensation on or off B-32 time Reports/sets current time (24-hour time) B-35 Simulates pressing up pushbutton B-26 zero Sets zero/span valves to zero mode B-30 Model 42i Low Source Instruction Manual Thermo Electron Corporation...

  • Page 257: Measurements

    8 Receive: set low avg time 8 ok Table B-2. Averaging Times Time, NO Measure Mode, Time, NO/NO Measure Selection Measure Mode Mode 1 seconds 10 seconds Thermo Electron Corporation Model 42i Low Source Instruction Manual...
  • Page 258 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 B-10 Model 42i Low Source Instruction Manual Thermo Electron Corporation...
  • Page 259 PMT are both on, that the instrument is in the span gas mode, that at least one of the alarm temperature is activated, and that the NO high concentration alarm is activated. Send: flags Receive: flags C0028008 Thermo Electron Corporation Model 42i Low Source Instruction Manual B-11...

  • Page 260: Alarms

    C. The example below sets the chamber temperature alarm maximum value to 50.0 °C. Send: set alarm chamber temp max 50.0 Receive: set alarm chamber temp max 50.0 ok B-12 Model 42i Low Source Instruction Manual Thermo Electron Corporation...
  • Page 261 C. The example below sets the converter temperature alarm maximum value to 640.0 °C. Send: set alarm converter temp max 640 Receive: set alarm converter temp max 640 ok Thermo Electron Corporation Model 42i Low Source Instruction Manual B-13...
  • Page 262 These commands report the pressure alarm minimum and maximum value current settings. The example below reports that the pressure alarm minimum value is 150 mmHg. B-14 Model 42i Low Source Instruction Manual Thermo Electron Corporation...

  • Page 263: Alarm Trigger Values

    Table B-3. The example below sets the NO concentration minimum alarm trigger to ceiling. Send: set alarm trig conc no 1 Receive: set alarm trig conc no 1 ok Table B-3. Alarm Trigger Values Value Alarm Trigger Floor Ceiling Thermo Electron Corporation Model 42i Low Source Instruction Manual B-15...

  • Page 264: Diagnostics

    These commands report the current selection for the digital outputs in the format. Output no Index number variable name active state. The active state for digital outputs is open or closed. The active state for digital inputs is high or low. B-16 Model 42i Low Source Instruction Manual Thermo Electron Corporation...
  • Page 265 Receive: lr01 12:31 02-22-03 flags 54089100 no -8413E-1 nox -8485E-1 lono -6471E-1 lonox -6527E-1 pres 130.9 pmtt 53.2 intt 80.0 rctt 80.0 convt 61 smplf 0.500 ozonf 0.000 pmtv -115 Thermo Electron Corporation Model 42i Low Source Instruction Manual B-17...
  • Page 266 100 records from the last record collected (record 740), and then returns 5 records: 640, 641, 642, 643, and 644. For details on how to decode the flag fields within these records, see Figure B-1 in the “flags” command. B-18 Model 42i Low Source Instruction Manual Thermo Electron Corporation...
  • Page 267 Table B-4. The example below sets the long record output format to ASCII with text. Send: set lrec format 1 Receive: set lrec format 1 ok Thermo Electron Corporation Model 42i Low Source Instruction Manual B-19...

  • Page 268: Record Output Formats

    5 minutes. Send: srec per Receive: srec per 5 min set srec per value set srec per value value = | 1 | 5 | 15 | 30 | 60 | B-20 Model 42i Low Source Instruction Manual Thermo Electron Corporation...
  • Page 269 These commands copy the current selections in scratch pad (sp) into the long record, short record, or streaming data list. The example below copies the current list in scratch pad into the long records list. Thermo Electron Corporation Model 42i Low Source Instruction Manual B-21...
  • Page 270 1 34 Receive: set sp field 1 34 ok stream per This command reports the currently set time interval in seconds for streaming data. Send: stream per Receive: stream per 10 B-22 Model 42i Low Source Instruction Manual Thermo Electron Corporation...

  • Page 271: Calibration

    , and NO coefficients based on the NO, NO , and NO span gas concentrations. The high and low commands are only available in dual and auto range mode. If the mode Thermo Electron Corporation Model 42i Low Source Instruction Manual B-23...
  • Page 272 These commands set the NO, NO , and NO coefficients to user-defined values to value, where value is a floating-point representation of the coefficient. The example below sets the NO coefficient to 1.005. B-24 Model 42i Low Source Instruction Manual Thermo Electron Corporation...
  • Page 273 These commands report the current NO and NO backgrounds. The example below reports that the NO background is 5.5 ppb. Send: no bkg Receive: no bkg 5.5 ppb Thermo Electron Corporation Model 42i Low Source Instruction Manual B-25...

  • Page 274: Keys/Display

    | run | up | 1 | 2 | 3 | 4 | These commands simulates pressing the front panel pushbuttons. The numbers represent the front-panel soft keys, from left to right. Send: push enter Receive: push enter ok B-26 Model 42i Low Source Instruction Manual Thermo Electron Corporation...
  • Page 275 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. Thermo Electron Corporation Model 42i Low Source Instruction Manual B-27...

  • Page 276: Measurement Configuration

    Table B-6 and B-7. The example below sets the NO full-scale to 100,000 ppb (extended ranges). Send: set range nox 6 Receive: set range nox 6 ok B-28 Model 42i Low Source Instruction Manual Thermo Electron Corporation...

  • Page 277: Standard Ranges

    = | 1 | 2 | 3 | This command reports the user-defined value of custom range 1, 2, or 3. The example below reports that custom range 1 is defined to 55.0 ppb. Thermo Electron Corporation Model 42i Low Source Instruction Manual B-29...
  • Page 278 These commands set the current gas mode to sample, zero, or span. The example below sets the instrument to span mode, that is, the instrument is sampling span gas. Send: set span Receive: set span ok B-30 Model 42i Low Source Instruction Manual Thermo Electron Corporation...
  • Page 279 These commands turn the pressure compensation on or off. The example below turns pressure compensation off. Send: set pres comp off Receive: set pres comp off ok Thermo Electron Corporation Model 42i Low Source Instruction Manual B-31...

  • Page 280: Hardware Configuration

    This command sets the screen’s level of contrast, according to Table B-8. The example below sets the contrast level to 50%. Send: set contrast 5 Receive: set contrast 5 ok Table B-8. Contrast Levels Level Contrast Level 100% B-32 Model 42i Low Source Instruction Manual Thermo Electron Corporation...
  • Page 281 Receive: set default params ok ozonator This command reports the ozonator on or off. The example below reports that the ozonator is on. Send: ozonator Receive: ozonator on Thermo Electron Corporation Model 42i Low Source Instruction Manual B-33...
  • Page 282 These commands set the PMT on or off. The example below turns the PMT off. Send: set pmt off Receive: set pmt off ok B-34 Model 42i Low Source Instruction Manual Thermo Electron Corporation...

  • Page 283: Communications Configuration

    This command sets the domain name server address, where address consists of four numbers ranging from 0-255 inclusive, separated by “.”. Send: set addr dns 192.168.1.1 Receive: set addr dns 192.168.1.1 ok Thermo Electron Corporation Model 42i Low Source Instruction Manual B-35...
  • Page 284 255.255.255.0 ok baud This command reports the current baud rate for the serial port (RS232/RS485). The example below reports that the current baud rate is 9600. Send: baud Receive: baud 9600 B-36 Model 42i Low Source Instruction Manual Thermo Electron Corporation...
  • Page 285 This command sets the reply termination format, where format is set according to Table B-9. The example below sets the reply termination format to checksum. Send: set format 01 Receive: set format 01 ok Thermo Electron Corporation Model 42i Low Source Instruction Manual B-37...

  • Page 286: Reply Termination Formats

    Note sending this command via RS-232 or RS-485 will require the host to use the new id for subsequent commands. Send: set instrument id 50 Receive: set instrument id 50 ok B-38 Model 42i Low Source Instruction Manual Thermo Electron Corporation...

  • Page 287: I/O Configuration

    Table B-10. The example below sets current output channel 4 to the 0-20 mA range. This command responds with “feature not enabled” if the I/O expansion board is not detected. Thermo Electron Corporation Model 42i Low Source Instruction Manual B-39...

  • Page 288: Analog Current Output Range Values

    2 3 ok Table B-11. Analog Voltage Output Range Values Range Output Range 0-1 V 0-100 mV 0-10 V 0-5 V 0 [cannot be set to this, but may report] Undefined B-40 Model 42i Low Source Instruction Manual Thermo Electron Corporation...
  • Page 289 This command assigns digital output channel to be assigned to the action associated with index, and assigns it an active state of state (open or closed). Send: set dout 4 11 open Receive: set dout 4 11 open ok Thermo Electron Corporation Model 42i Low Source Instruction Manual B-41...

  • Page 290: Default Output Assignment

    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. B-42 Model 42i Low Source Instruction Manual Thermo Electron Corporation...
  • Page 291 These commands set the relay logic to normally open or closed for relay number value, where value is the relay between 1 and 16. The example below sets the relay no 1 logic to normally open. Thermo Electron Corporation Model 42i Low Source Instruction Manual B-43...

  • Page 292: Record Layout Definition

    The second line of the Layout response is the binary parameter list for parsing the fields from a binary response. Parameters MUST be separated by Binary Responses spaces, and the line is terminated by a '\n'. Valid fields are: B-44 Model 42i Low Source Instruction Manual Thermo Electron Corporation...

  • Page 293: Format Specifier For Front-Panel Layout

    The value source, which is the item (or word) number in the DATA/ERec response, appears next. This is followed by an optional bitfield designator. The datum identified by the value source can be printed as a string 's', Thermo Electron Corporation Model 42i Low Source Instruction Manual B-45...
  • Page 294 B- Indicates a button which pops up an input dialog prompting the user for a new value using the designated input format. The input format is specified from the 'B' through the subsequent semicolon. B-46 Model 42i Low Source Instruction Manual Thermo Electron Corporation...
  • Page 295 'NO', but the value is taken from the eighteenth element of the data response, again interpreted as a string. A button appears on this line which, when pressed, pops up an input dialog which will state "Please enter a new Thermo Electron Corporation Model 42i Low Source Instruction Manual B-47...
  • Page 296 The background value is taken from the 7th element, and the precision specifier is taken from the 8th. If the asterisk were not present, it would indicate instead that 8 digits after the decimal point should be displayed. B-48 Model 42i Low Source Instruction Manual Thermo Electron Corporation...

  • Page 297: Appendix C Modbus Protocol

    This 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: •...

  • Page 298: Serial Communication Parameters

    0x0000 to 0xFFFF (Passed back in response) Protocol Identifier 2 Bytes 0x00 (MODBUS protocol) Length 2 Bytes 0x0000 to 0xFFFF (Number of following bytes) Unit Identifier 1 Byte 0x00 to 0xFF (Passed back in response) 42i Low Source Instruction Manual Thermo Electron Corporation...

  • Page 299: Function Codes

    These requests specify the starting address, i.e. the address of the first output specified, and the number of outputs. The outputs are addressed starting at zero. Therefore, outputs numbered 1–16 are addressed as 0–15. Thermo Electron Corporation 42i Low Source Instruction Manual...
  • Page 300 Here is an example of a request and response to read outputs 2–15: Request Field Name (Hex) Function 0x01 Starting Address Hi 0x00 Starting Address Lo 0x02 Quantity of Outputs Hi 0x00 Quantity of Outputs Lo 0x0D 42i Low Source Instruction Manual Thermo Electron Corporation...
  • Page 301 Request Function code 1 Byte 0x03 or 0x04 Starting Address 2 Bytes 0x0000 to maximum allowed by instrument Quantity of Registers 2 Bytes 1 to maximum allowed by instrument Thermo Electron Corporation 42i Low Source Instruction Manual...
  • Page 302 Register value Lo (13) 0x64 The contents of register 10 are shown as the two byte values of 0x02 0x2B. The contents of registers 11–13 are 0x00 0x00, 0x00 0x64 and 0x00 0x64, respectively. 42i Low Source Instruction Manual Thermo Electron Corporation...
  • Page 303 03=Illegal Data, 04=Slave Device Failure Here is an example of a request to write Coil 5 ON: Request Field Name (Hex) Function Output Address Hi Output Address Lo Output Value Hi Output Value Lo Thermo Electron Corporation 42i Low Source Instruction Manual...

  • Page 304: Modbus Commands Supported

    Output Value Hi Output Value Lo MODBUS Commands Table C-1 through table C-3 lists the MODBUS commands supported for Supported the Model 42i Low Source. Table C-1. Read Coils for 42i Low Source Coil Number Status AUTORANGE (NO LOCAL/REMOTE SERVICE...

  • Page 305: Read Registers For 42I Low Source

    MODBUS Protocol MODBUS Commands Supported Table C-1. Read Coils for 42i Low Source Coil Number Status NOT USED PRESSURE ALARM NOT USED OZONE FLOW ALARM MOTHERBOARD STATUS ALARM INTERFACE BD STATUS ALARM I/O EXP BD STATUS ALARM NOT USED CONC ALARM SAMPLE MODE Table C-2.

  • Page 306: Write Coils For 42I Low Source

    MODBUS Protocol MODBUS Commands Supported Table C-2. Read Registers for 42i Low Source Register Number Variable 40039&40040 COOLER TEMP 40041&40042 CNV TEMP 40043&40044 NOT USED 40045&40046 NOT USED 40047&40048 NOT USED 40049&40050 CHAMBER PRES 40051&40052 NOT USED 40053&40054 PMT VOLTS 40055&40056...
  • Page 307 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”...

  • Page 308: Appendix D Geysitech (Bayern-Hessen) Protocol

    Each Command is framed by control characters, <STX> at the start and terminated with either <ETX> or <CR>. If a command is terminated with <ETX> then additional two characters <BCC> is attached after <ETX>, this is the block checksum. Model 42i Low Source Instruction Manual Thermo Electron Corporation...
  • Page 309 Command ‘K’ switches the instrument gas mode to Span mode. Command ‘M’ switches the instrument gas mode to Sample mode. The following are the different acceptable formats of the ST command: <STX>ST<address><control command><ETX><BCC> <STX>ST<address><control command><CR> <STX>ST<address><SP><control command><CR> <STX>ST<address><SP><control command><ETX><BCC> Thermo Electron Corporation Model 42i Low Source Instruction Manual...
  • Page 310 <STX> which is followed by the characters DA, and the <address> (if present) matches the Instrument Address, and the command is terminated with either <CR> with no checksum or <ETX> followed by the correct checksum <BCC>. Model 42i Low Source Instruction Manual Thermo Electron Corporation...
  • Page 311 Table D–1 Table D–2 below. <SFKT>: is the space provided for future use for special function, it currently contains a string of ten 0’s i.e. <0000000000>. Thermo Electron Corporation Model 42i Low Source Instruction Manual...
  • Page 312 Dual/Auto Range Mode The 6 measurements reported in dual or auto range modes include: low NO ● low NO ● low NO ● high NO ● high NO ● high NO ● Model 42i Low Source Instruction Manual Thermo Electron Corporation...

  • Page 313: Operating Status For Model 42I Low Source

    Table D–1 for operating status and Table D–2 for error status for the Model 42i Low Source. Status Table D–1. Operating Status for Model 42i Low Source Hex-value Operating status: Service Mode (On) Maintenance (Local) Zero gas (On) Span gas (On)

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