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Thermo Scientific 48i Instruction Manual
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Thermo Scientific 48i Instruction Manual

Gas filter correlation co analyzer
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Model 48i
Instruction Manual
Gas Filter Correlation CO Analyzer
Part Number 101891-00
10Aug2017

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Summary of Contents for Thermo Scientific 48i

  • Page 1 Model 48i Instruction Manual Gas Filter Correlation CO Analyzer Part Number 101891-00 10Aug2017...
  • Page 2 © 2007 Thermo Fisher Scientific Inc. All rights reserved. Specifications, terms and pricing are subject to change. Not all products are available in all countries. Please consult your local sales representative for details. Thermo Fisher Scientific Air Quality Instruments 27 Forge Parkway Franklin, MA 02038 1-508-520-0430 www.thermo.com/aqi...

  • Page 3: Weee Compliance

    WEEE Compliance This product is required to comply with the European Union’s Waste Electrical & Electronic Equipment (WEEE) Directive 2002/96/EC. It is marked with the following symbol: Thermo Fisher Scientific 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.
  • Page 5 Reference Method Designation The Thermo Scientific Model 48i is designated by the United States Environmental Protection Agency (USEPA) as a Reference Method for CO as set forth in the U.S. Environmental Protection Agency regulations at Title 40, Part 53 of the U.S. Code of Fereral Regulations.

  • Page 7: About This Manual

    About This Manual This manual provides information about installing, operating, maintaining, and servicing the Model 48i CO gas analyzer. It also contains important alerts to ensure safe operation and prevent equipment damage. The manual is organized into the following chapters and appendices to provide direct access to specific operation and service information.
  • Page 8 Safety and Equipment Damage Alerts in this Manual Alert Description WARNING The Model 48i is supplied with a three-wire grounded power cord. Under no circumstances should this ▲ grounding system be defeated. If the equipment is operated in a manner not specified by the manufacturer, the protection provided by the ▲...
  • Page 9 Operation of this equipment in a residential area is likely to cause harmful interference, in Thermo Fisher Scientific Model 48i Instruction Manual...
  • Page 10 Service is available from exclusive distributors worldwide. Contact one of the phone numbers below for product support and technical information or visit us on the web at www.thermo.com/aqi. 1-866-282-0430 Toll Free 1-508-520-0430 International Model 48i Instruction Manual Thermo Fisher Scientific...

  • Page 11: Table Of Contents

    CO Range ..................3-14 Set Custom Ranges ................ 3-15 Custom Ranges ................3-15 Averaging Time ................. 3-16 Calibration Factors Menu ..............3-16 CO Background ................3-17 CO Coefficient ................3-18 Background ................3-18 Coefficient ................3-19 Thermo Fisher Scientific Model 48i Instruction Manual...
  • Page 12 Parity ..................3-36 Stop Bits ..................3-36 RS-232/RS-485 Selection ............3-37 Instrument ID ................3-37 Gesytec Serial No ................ 3-38 Communication Protocol ............3-38 Streaming Data Configuration ............ 3-39 Streaming Data Interval .............. 3-40 Model 48i Instruction Manual Thermo Fisher Scientific...
  • Page 13 User Value .................. 3-57 Temperature Compensation ............3-57 Pressure Compensation ..............3-58 Compensation ................3-58 Screen Contrast ................3-59 Service Mode ................. 3-59 Date/Time ..................3-60 Timezone ..................3-60 Diagnostics Menu ................3-61 Thermo Fisher Scientific Model 48i Instruction Manual...
  • Page 14 Min Trigger Concentration ............3-76 Concentration ................3-76 Min and Max O Concentration Limits ........3-76 Min Trigger ................3-77 External Alarms ................3-77 Service Menu ..................3-78 Range Mode Select ................. 3-78 viii Model 48i Instruction Manual Thermo Fisher Scientific...
  • Page 15 Lock Instrument ................3-95 Lock/Unlock and Local/Remote Operation ........ 3-95 Change Password ................3-96 Remove Password ................3-96 Unlock Instrument ................ 3-96 Chapter 4 Calibration ......................4-1 Equipment Required ................4-1 CO Concentration Standard ............4-1 Thermo Fisher Scientific Model 48i Instruction Manual...
  • Page 16 Board-Level Connection Diagrams ............. 6-5 Connector Pin Descriptions ..............6-7 Service Locations ................6-20 Chapter 7 Servicing ......................7-1 Safety Precautions ................7-3 Firmware Updates ................7-4 Accessing the Service Mode ..............7-4 Model 48i Instruction Manual Thermo Fisher Scientific...
  • Page 17 Hardware .................... 8-1 Optical Bench .................. 8-2 Band-pass Filter ................8-2 Bench Heater Board ................. 8-2 Chopper Motor ................8-2 Optical Pickup ................. 8-3 Gas Filter Wheel ................8-3 Infrared Source ................8-3 Thermo Fisher Scientific Model 48i Instruction Manual...
  • Page 18 Filter Wheel Purge ................9-4 Calibration Note ................9-5 Teflon Particulate Filter ..............9-5 I/O Expansion Board Assembly ............9-5 25-Pin Terminal Board Assembly ............. 9-5 Terminal Block and Cable Kits ............9-5 Cables ....................9-6 Model 48i Instruction Manual Thermo Fisher Scientific...
  • Page 19 MBAP Header ................. C-2 Function Code ................. C-3 Data ....................C-3 Error Check ..................C-3 Function Codes ................... C-3 (0x01/0x02) Read Coils/Read Inputs ..........C-3 (0x03/0x04) Read Holding Registers/Read Input Registers ....C-5 Thermo Fisher Scientific Model 48i Instruction Manual xiii...
  • Page 20 Instrument Control Command (ST) ..........D-3 Data Sampling/Data Query Command (DA) ........D-4 Measurements reported in response to DA command ..... D-7 Single Range Mode ..............D-7 Dual/Auto Range Mode ............... D-7 Operating and Error Status ............. D-7 Model 48i Instruction Manual Thermo Fisher Scientific...
  • Page 21 Figures Figure 1–1. Model 48i Flow Schematic ............. 1-3 Figure 2–1. Remove the Packing Material ............2-2 Figure 2–2. Removing the Shipping Screws ............2-2 Figure 2–3. Model 48i Rear Panel ..............2-4 Figure 2–4. Atmospheric Dump Bypass Plumbing ..........2-4 Figure 2–5.
  • Page 22 Figure 9–3. Rack Mount Option Assembly ............9-8 Figure 9–4. Bench Mounting ................9-9 Figure 9–5. EIA Rack Mounting ................ 9-10 Figure 9–6. Retrofit Rack Mounting ..............9-11 Figure B–1. Flags Field ..................B-13 Model 48i Instruction Manual Thermo Fisher Scientific...
  • Page 23 Tables Table 1–1. Model 48i Specifications ..............1-3 Table 1–2. Model 48i Optional Internal Oxygen Sensor Specifications ... 1-4 Table 2–1. I/O Terminal Board Pin Descriptions ..........2-6 Table 2–2. D/O Terminal Board Pin Descriptions..........2-7 Table 2–3. 25-Pin Terminal Board Pin Descriptions ........... 2-8 Table 3–1.
  • Page 24 Table C–1. Read Coils for 48i ................C-8 Table C–2. Read Registers for 48i ..............C-10 Table C–3. Write Coils for 48i ................C-12 Table D–1. Operating Status for Model 48i ............D-7 Table D–2. Error Status for Model 48i .............. D-8 xviii...

  • Page 25: Chapter 1 Introduction

    Chapter 1 Introduction The Model 48i CO Analyzer measures CO concentration using Gas Filter Correlation (GFC). The Model 48i combines proven detection technology, easy to use menu-driven firmware, and advanced diagnostics to offer unsurpassed flexibility and reliability. The Model 48i has the following...

  • Page 26: Principle Of Operation

    Operation absorption is a non-linear measurement technique, it is necessary to transform the basic analyzer signal into a linear output. The Model 48i uses an internally stored calibration curve to accurately linearize the instrument output over any range up to a concentration of 10,000 ppm.

  • Page 27: Specifications

    Specifications Figure 1–1. Model 48i Flow Schematic Specifications Table 1–1 lists the specifications for the Model 48i. Table 1–1. Model 48i Specifications Preset ranges 0-1, 2, 5, 10, 20, 50, 100, 200, 500, 1000, 2000, 5000, 10000 (ppm or mg/m...

  • Page 28: Table 1-2. Model 48I Optional Internal Oxygen Sensor Specifications

    Ethernet connection RJ45 connector for 10Mbs Ethernet connection, static or dynamic TCP/IP addressing *In non-condensing environments. Performance specifications based on operation with 20–30 °C range. Table 1–2. Model 48i Optional Internal Oxygen Sensor Specifications Technology Paramagnetic (Pm) Range 0-100% O Accuracy (Intrinsic error) <±0.1% O...

  • Page 29: Chapter 2 Installation

    ▲ Unpacking and The Model 48i is shipped complete in one container. If there is obvious damage to the shipping container when you receive the instrument, notify Inspection the carrier immediately and hold for inspection. The carrier is responsible for any damage incurred during shipment.

  • Page 30: Figure 2-1. Remove The Packing Material

    Units without Optional I/O Board Units with Optional I/O Board Figure 2–1. Remove the Packing Material 4. Remove the three shipping screws (Figure 2–2). Shipping Screws (3) Figure 2–2. Removing the Shipping Screws Model 48i Instruction Manual Thermo Fisher Scientific...

  • Page 31: Setup Procedure

    4. Connect a suitable recording device to the rear panel connector. For detailed information about connecting to the instrument, refer to: “Connecting External Devices” on page Instrument Controls > “I/O Configuration” on page 3-45 “External Device Connection Components” on page Thermo Fisher Scientific Model 48i Instruction Manual...

  • Page 32: Figure 2-3. Model 48I Rear Panel

    Testing” on page 7-28. 5. Plug the instrument into an outlet of the appropriate voltage and frequency. WARNING The Model 48i is supplied with a three-wire grounding cord. Under no circumstances should this grounding system be defeated. ▲ Figure 2–3. Model 48i Rear Panel...

  • Page 33: Connecting External Devices

    Note Not all of the I/O available in the instrument is brought out on the supplied terminal board. If more I/O is desired, an alternative means of connection is required. See optional “Terminal Block and Cable Kits”. ▲ Thermo Fisher Scientific Model 48i Instruction Manual...

  • Page 34: Figure 2-5. I/O Terminal Board Views

    Signal Description Analog1 Power_Fail_NC Analog ground Power_Fail_COM Analog2 Power_Fail_NO Analog ground TTL_Input1 Analog3 TTL_Input2 Analog ground TTL_Input3 Analog4 TTL_Input4 Analog ground Digital ground Analog5 TTL_Input5 Analog ground TTL_Input6 Analog6 TTL_Input7 Analog ground Digital ground Model 48i Instruction Manual Thermo Fisher Scientific...

  • Page 35: Figure 2-6. D/O Terminal Board Views

    Table 2–2. D/O Terminal Board Pin Descriptions Screw Signal Description Screw Signal Description Relay1_ContactA Relay7_ContactA Relay1_ContactB Relay7_ContactB Relay2_ContactA Relay8_ContactA Relay2_ContactB Relay8_ContactB Relay3_ContactA Relay9_ContactA Relay3_ContactB Relay9_ContactB Relay4_ContactA Relay10_ContactA Relay4_ContactB Relay10_ContactB Relay5_ContactA Solenoid_Drive_Output1 Relay5_ContactB +24V Relay6_ContactA Solenoid_Drive_Output2 Relay6_ContactB +24V Thermo Fisher Scientific Model 48i Instruction Manual...

  • Page 36: Figure 2-7. 25-Pin Terminal Board Views

    Table 2–3. 25-Pin Terminal Board Pin Descriptions Screw Signal Description Screw Signal Description IOut1 Analog_In1 GND_ISO Analog_In2 IOut2 Analog_In3 GND_ISO GNDD IOut3 Analog_In4 GND_ISO Analog_In5 IOut4 Analog_In6 GND_ISO GNDD IOut5 Analog_In7 GND_ISO Analog_In8 IOut6 GNDD GND_ISO GNDD Model 48i Instruction Manual Thermo Fisher Scientific...
  • Page 37 Installation Connecting External Devices Thermo Fisher Scientific Model 48i Instruction Manual...

  • Page 38: 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 the actual monitoring, perform a multipoint calibration as described in the “Calibration” chapter. 2-10 Model 48i Instruction Manual Thermo Fisher Scientific...

  • Page 39: Chapter 3 Operation

    Some menus contain more items than can be displayed at one time. For these menus, use to move the cursor up and down to each item. Thermo Fisher Scientific Model 48i Instruction Manual...

  • Page 40: Pushbuttons

    If the liquid crystal contacts your skin or clothes, wash it off immediately using soap and water. ▲ Pushbuttons The Pushbuttons allow the user to traverse the various screens/menus. Figure 3–2. Front Panel Pushbuttons Model 48i Instruction Manual Thermo Fisher Scientific...

  • Page 41: Soft Keys

    All items under the Service menu (including the menu itself) cannot be assigned soft keys. ▲ Thermo Fisher Scientific Model 48i Instruction Manual...

  • Page 42: Alphanumeric Entry Screen

    RANGE DIAGS ALARM RANGE DIAGS ALARM Firmware The Model 48i utilizes the menu-driven firmware as illustrated by the flowchart in Figure 3–3. The Power-Up screen, shown at the top of the Overview 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 43: Figure 3-3. Flowchart Of Menu-Driven Firmware

    Operation Firmware Overview Figure 3–3. Flowchart of Menu-Driven Firmware Thermo Fisher Scientific Model 48i Instruction Manual...

  • Page 44: Power-Up Screen

    Operation Firmware Overview Power-Up Screen The Power-Up screen is displayed on power up of the Model 48i. This screen is displayed while the internal components are warming up and diagnostic checks are performed. Please wait while booting... Run Screen The Run screen displays the current CO concentrations. The status bar...

  • Page 45: Custom Run Screens

    Up to five Custom Run Screens can be configured. For more information on custom run screens, see “Setup Run Screens” on page 3-89. DIAGNOSTICS 31.4 750.0 Instrument Readings 0.800 SAMPLE 12:34 ALARMx RANGE DIAGS ALARM Thermo Fisher Scientific Model 48i Instruction Manual...

  • Page 46: Main Menu

    In the Main Menu, choose Range ● RANGE: RANGE: >GAS UNITS >GAS UNITS RANGE 50.0 LO RANGE 50.0 SET CUSTOM RANGES HI RANGE 100.0 SET CUSTOM RANGES RANGE DIAGS ALARM RANGE DIAGS ALARM Model 48i Instruction Manual Thermo Fisher Scientific...

  • Page 47: Single Range Mode

    16, 18, 19, 35, 37 2, 4, 6, 8, 10, 12 Signal Ground Note All channels are user definable. If any customization has been made to the analog output configuration, the default selections my not apply. ▲ Thermo Fisher Scientific Model 48i Instruction Manual...

  • Page 48: Dual Range Mode

    Table 3–3 for channels and pin connections. Dual range mode may be selected from the “Range Mode Select” on page 3-78. Figure 3–5. Pin-Out of Rear Panel Connector in Dual Range Mode 3-10 Model 48i Instruction Manual Thermo Fisher Scientific...

  • Page 49: Auto Range Mode

    One possible fix for this would be to perform the 3-point calibration (via the Service menu) on both ranges and make sure that the low range high point matches or is greater than the Thermo Fisher Scientific Model 48i Instruction Manual 3-11...

  • Page 50: Figure 3-6. Analog Output In Auto Range Mode

    3–7. See Table 3–4 for channels and pin connections. Auto range mode may be selected from the “Range Mode Select” on page 3-78. Figure 3–7. Pin-Out of Rear Connector in Auto Range Mode 3-12 Model 48i Instruction Manual Thermo Fisher Scientific...

  • Page 51: Gas Units

    20 °C. A display warning will appear that ranges will be defaulted and calibration parameters reset. ▲ GAS UNITS: CURRENTLY: SET TO: mg/m3 ? AND SET RANGES AND CAL DEFAULT SETTINGSXXXXXXXXXX  CHANGE VALUE SAVE RANGE DIAGS ALARM Thermo Fisher Scientific Model 48i Instruction Manual 3-13...

  • Page 52: Co Range

    In the Main Menu, choose Range > Range. ● RANGE: CURRENTLY: 10000 SET TO: 5000 ?  CHANGE VALUE SAVE VALUE RANGE DIAGS ALARM Table 3–5. Available Operating Ranges mg/m 1000 1000 2000 2000 5000 5000 3-14 Model 48i Instruction Manual Thermo Fisher Scientific...

  • Page 53: Set Custom Ranges

    In the Main Menu, choose Range > Set Custom Ranges > Custom ● Range 1, 2, or 3. CUSTOM RANGE 1: CURRENTLY: 55.5 SET TO: 000055.5  MOVE CURSOR  CHANGE VALUE SAVE RANGE DIAGS ALARM Thermo Fisher Scientific Model 48i Instruction Manual 3-15...

  • Page 54: Averaging Time

    Normally, the calibration factors are calculated automatically using the functions described in “Calibration Menu” later in this chapter. However, the calibration factors can also be set manually using the functions in this menu. 3-16 Model 48i Instruction Manual Thermo Fisher Scientific...

  • Page 55: Co Background

    Run screen. Press to actually set the CO reading to 0 ppm and store the background correction of 15.80 ppm. In the Main Menu, choose Calibration Factors > Bkg. ● Thermo Fisher Scientific Model 48i Instruction Manual 3-17...

  • Page 56: Co Coefficient

    The first line of the display shows the current O reading. The second line of the display shows the O background correction that is stored in memory. The O 3-18 Model 48i Instruction Manual Thermo Fisher Scientific...

  • Page 57: O Coefficient

    Note The concentration value will show “ERROR” if the measured concentration is not a valid span value (either too high or too low). ▲ Thermo Fisher Scientific Model 48i Instruction Manual 3-19...

  • Page 58: Reset User Calibration Defaults

    For example, a low CO range of 50 ppm and a high CO range of 1,000 ppm. For more information about calibration, see Chapter 4, “Calibration”. In the Main Menu, choose Calibration. ● 3-20 Model 48i Instruction Manual Thermo Fisher Scientific...

  • Page 59: Calibrate Co Background

    To be most accurate, use the 300-second averaging time. For more information about calibration, see Chapter 4, “Calibration”. In the Main Menu, choose Calibration > Cal CO Coefficient. ● Thermo Fisher Scientific Model 48i Instruction Manual 3-21...

  • Page 60: Zero/Span Check

    NEXT DATE AND TIME: 19 MAR 2009 12:34 19 MAR 2009 12:34 ? PRESS TO EDIT SETTING: DAYS  SET MONTHS  CHANGE VALUE SAVE VALUE RANGE DIAGS ALARM RANGE DIAGS ALARM 3-22 Model 48i Instruction Manual Thermo Fisher Scientific...

  • Page 61: Period Hours

    In the Main Menu, choose Calibration > Zero/Span Check > Zero, ● Span or Purge Duration Min. ZERO DURATION: CURRENTLY: 30 MIN SET TO: 31 MIN ?  MOVE CURSOR  CHANGE VALUE SAVE RANGE DIAGS ALARM Thermo Fisher Scientific Model 48i Instruction Manual 3-23...

  • Page 62: Zero/Span Averaging Time

    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. ZERO/SPAN RATIO: CURRENTLY: SET TO: 2:1 ?  CHANGE VALUE SAVE VALUE RANGE DIAGS ALARM 3-24 Model 48i Instruction Manual Thermo Fisher Scientific...

  • Page 63: Calibrate O Background

    The O Compensation menu item is only displayed if the internal O sensor option is installed. In the Main Menu, choose Instrument Controls. ● Thermo Fisher Scientific Model 48i Instruction Manual 3-25...

  • Page 64: Datalogging Settings

    4 months (>190,000 total records). The Datalogging Settings menu allows the user flexibility in how data is stored and recorded. In the Main Menu, choose Instrument Controls > Datalogging ● Settings. 3-26 Model 48i Instruction Manual Thermo Fisher Scientific...

  • Page 65: Select Srec/Lrec

    The Number of Records screen is used to select the number of records to view, ending with the most recent. It also shows the total number of records that have been logged for the selected record type. Thermo Fisher Scientific Model 48i Instruction Manual 3-27...

  • Page 66: Date And Time

    The Record Display screen (read only) displays the selected records. time date flags 10:01 01/20/09 FC0088900 10:02 01/20/09 FC0088900 10:03 01/20/09 FC0088900 10:04 01/20/09 FC0088900  PGUP/DN  PAN L/R RANGE DIAGS ALARM 3-28 Model 48i Instruction Manual Thermo Fisher Scientific...

  • Page 67: Erase Log

    The Choose Field Data submenu displays a list of the types of data that can be logged for the current field. Choices are Concentrations, Corrected Concentrations (if the O compensation option is enabled), Other Measurements, and Analog Inputs (if the I/O expansion board is installed). Thermo Fisher Scientific Model 48i Instruction Manual 3-29...

  • Page 68: Concentrations

    Content” below. This screen is only displayed if the O compensation option is enabled. In the Main Menu, choose Instrument Controls > Datalogging Settings ● > Select Content > select Field > Corrected Concentrations. 3-30 Model 48i Instruction Manual Thermo Fisher Scientific...

  • Page 69: Other Measurements

    “Commit Content” below. In the Main Menu, choose Instrument Controls > Datalogging Settings ● > Select Content > select Field > Analog Inputs. Thermo Fisher Scientific Model 48i Instruction Manual 3-31...

  • Page 70: Commit Content

    RESET LREC DATA 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 3-32 Model 48i Instruction Manual Thermo Fisher Scientific...

  • Page 71: Configure Datalogging

    Changing this value results in log erasure for both types of records, and changing the percent allocated to one record type will automatically change the other. In the Main Menu, choose Instrument Controls > Datalogging Settings ● > Configure Datalogging > Memory Allocation %. Thermo Fisher Scientific Model 48i Instruction Manual 3-33...

  • Page 72: Data Treatment

    In the Main Menu, choose Instrument Controls > Datalogging Settings ● > Configure Datalogging > Flag Status Data. SET LREC FLAG STATUS DATA: CURRENTLY: OFF SET TO: ON  CHANGE VALUE SAVE RANGE DIAGS ALARM 3-34 Model 48i Instruction Manual Thermo Fisher Scientific...

  • Page 73: Communication Settings

    The analyzer’s default baud rate is set to 9600 to provide backwards compatibility with the older C-series analyzers. In the Main Menu, choose Instrument Controls > Communication ● Settings > Serial Settings > Baud Rate. Thermo Fisher Scientific Model 48i Instruction Manual 3-35...

  • Page 74: Baud Rate

    The Stop Bits screen is used to set the number of stop bits for the serial port to 1 (default) or 2. In the Main Menu, choose Instrument Controls > Communication ● Settings > Serial Settings > Stop Bits. 3-36 Model 48i Instruction Manual Thermo Fisher Scientific...

  • Page 75: Rs-232/Rs-485 Selection

    It may be necessary to edit the ID number if two or more of instruments of the same model are connected to one computer. Valid instrument ID numbers are from 0 to 127. The Model 48i has a default instrument ID of 48. For more information about the Instrument ID, see Appendix B “C-Link Protocol...

  • Page 76: Gesytec Serial No

    Gesytec (Bayern-Hessen) protocol - The Gesytec (Bayern-Hessen) protocol support for the Model 48i enables the user to read the various concentrations. Refer to Appendix D for detailed Gesytec (Bayern-Hessen) information.

  • Page 77: Streaming Data Configuration

    The MODBUS protocol support for the Model 48i enables the user to read the various concentrations and other analog values or variables, read the status of the digital outputs of the instrument, and to trigger or simulate the activation of a digital input to the instrument.

  • Page 78: Streaming Data Interval

    If set to YES, then each streaming data record will include a set of flags that indicate various diagnostic or alarm conditions.  In the Main Menu, choose Instrument Controls > Communication Settings > Streaming Data Config > Add Flags. 3-40 Model 48i Instruction Manual Thermo Fisher Scientific...

  • Page 79: Choose Stream Data Item

    In dual or auto range mode, “HI” or “LO” is displayed to indicate high or low range concentrations. This screen is only displayed if the O compensation option is enabled. Thermo Fisher Scientific Model 48i Instruction Manual 3-41...

  • Page 80: Other Measurements

    “<--” after it. Once an item is selected, pressing will save the selected streaming data item. In the Main Menu, choose Instrument Controls > Communication ● Settings > Streaming Data Config > select Item > Analog Inputs. 3-42 Model 48i Instruction Manual Thermo Fisher Scientific...

  • Page 81: Tcp/Ip Settings

    In the Main Menu, choose Instrument Controls > Communication ● Settings > TCP/IP Settings > Use DCHP. DHCP: CURRENTLY: SET TO: ON ? TOGGLE VALUE CYCLE POWER TO CHANGE DHCP RANGE DIAGS ALARM Thermo Fisher Scientific Model 48i Instruction Manual 3-43...

  • Page 82: Ip Address

    DHCP” above. Any traffic to addresses that are not on the local subnet will be routed through this address. In the Main Menu, choose Instrument Controls > Communication ● Settings > TCP/IP Settings > Gateway. 3-44 Model 48i Instruction Manual Thermo Fisher Scientific...

  • Page 83: Host Name

    RANGE DIAGS ALARM I/O Configuration The I/O Configuration menu deals with configuration of the analyzer’s I/O system. The analog input configuration is displayed only if the I/O expansion board option is installed. Thermo Fisher Scientific Model 48i Instruction Manual 3-45...

  • Page 84: Output Relay Settings

    Press to toggle and set the logic state open or closed. ● OUTPUT RELAY SETUP: >LOGIC STATE OPEN INSTRUMENT STATE RANGE DIAGS ALARM 3-46 Model 48i Instruction Manual Thermo Fisher Scientific...

  • Page 85: Instrument State

    DIAGS ALARM BENCH TEMP PRESSURE SAMPLE FLOW INTENSITY MOTOR SPEED BIAS VOLTAGE MB STATUS MIB STATUS I/O BD STATUS CONC ALARM <-- ZERO CHK/CAL SPAN CHK/CAL EXT ALARM 1 EXT ALARM 2 Thermo Fisher Scientific Model 48i Instruction Manual 3-47...

  • Page 86: Non-Alarm

    In the Main Menu, choose Instrument Controls > I/O Configuration > ● Digital Input Settings. DIGITAL INPUT SETTINGS: >1 SET BACKGROUND CAL TO LO SPAN AOUTS TO ZERO AOUTS TO FS  NONE RANGE DIAGS ALARM 3-48 Model 48i Instruction Manual Thermo Fisher Scientific...

  • Page 87: Logic State

    (Select Channel) output channels available for configuration. Channel choices include all voltage channels, all current channels, individual voltage channels 1–6, and individual current channels 1–6 (if the I/O expansion board option is installed). Thermo Fisher Scientific Model 48i Instruction Manual 3-49...

  • Page 88: Allow Over/Under Range

    If either of these modes is going to be changed on a regular basis, then the user must configure each set of data separately after changing the modes to each setting. ▲ 3-50 Model 48i Instruction Manual Thermo Fisher Scientific...

  • Page 89: Select Range

    The following example shows the set minimum value screen. In the Main Menu, choose Instrument Controls > IO Configuration > ● Analog Output Config > select Channel > Set Minimum or Maximum Value. Thermo Fisher Scientific Model 48i Instruction Manual 3-51...

  • Page 90: Table 3-6. Analog Output Zero To Full-Scale Table

    Range Status is visible only in auto range mode. The Concentrations screen is shown below. See Table 3–7 below for a list of items for each signal group choice. 3-52 Model 48i Instruction Manual Thermo Fisher Scientific...

  • Page 91: Table 3-7. Signal Type Group Choices

    Sample Flow Analog Input 7 (if the I/O expansion board is installed) Intensity Analog Input 8 (if the I/O expansion board is installed) Motor Speed Bias Supply Ext Alarms Thermo Fisher Scientific Model 48i Instruction Manual 3-53...

  • Page 92: Analog Input Configuration

    1 to 3 characters in length, and defaults to IN1 to IN8 (user input channel number). In the Main Menu, choose Instrument Controls > I/O Configuration > ● Analog Input Config > select Channel > Descriptor. 3-54 Model 48i Instruction Manual Thermo Fisher Scientific...

  • Page 93: Units

    Each point in the table consists of an analog input voltage value (0–10.5 V) and a corresponding reading value. Only two points are Thermo Fisher Scientific Model 48i Instruction Manual 3-55...

  • Page 94: Table Point

    In the Main Menu, choose Instrument Controls > I/O Configuration > ● Analog Input Config > select Channel > select Point > Volts. TABLE POINT 01 VOLTS: CURRENTLY: 0.00 SET TO: 00.00  MOVE CURSOR  CHANGE VALUE SAVE RANGE DIAGS ALARM 3-56 Model 48i Instruction Manual Thermo Fisher Scientific...

  • Page 95: User Value

    Model 48i 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 96: Pressure Compensation

    COR) that may be used for analog outputs or datalogging. The O2 CONC line shows the measured O concentration if the compensation is on or the correction O concentration if it is off. 3-58 Model 48i Instruction Manual Thermo Fisher Scientific...

  • Page 97: O 2 Compensation

    The Service Mode screen is used to turn the service mode on or off. Turning service mode “ON” locks out any remote actions and allows access to parameters and functions that are useful when making adjustments or Thermo Fisher Scientific Model 48i Instruction Manual 3-59...

  • Page 98: Date/Time

    Operation Instrument Controls Menu diagnosing the Model 48i. The service (wrench) icon on the status bar is shown when service mode is on. 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 99: Diagnostics Menu

    Prior to contacting the factory with any questions regarding the instrument, please note the product model name and the program version numbers. In the Main Menu, choose Diagnostics > Program Versions. ● Thermo Fisher Scientific Model 48i Instruction Manual 3-61...

  • Page 100: Voltages

    The Interface Board screen (read only) is used to display the current voltage readings on the interface board. This menu is only displayed if the I/O expansion board option is installed. In the Main Menu, choose Diagnostics > Voltages > Interface Board ● Voltages. 3-62 Model 48i Instruction Manual Thermo Fisher Scientific...

  • Page 101: I/O Board Voltages

    RANGE DIAGS ALARM Pressure The Pressure screen (read only) displays the current optical bench pressure. The pressure is measured by a pressure transducer. In the Main Menu, choose Diagnostics > Pressure. ● Thermo Fisher Scientific Model 48i Instruction Manual 3-63...

  • Page 102: Flow

    The AGC Intensity screen (read only) displays the intensity (in Hertz) of the reference channel Automatic Gain Control (AGC) circuit. The AGC circuit optimizes the noise and resolution levels of the Model 48i. The AGC intensity reading should be about 250,000 Hertz.

  • Page 103: Motor Speed

    The Analog Input Readings screen (read only) displays the 8 current user- scaled analog readings (if the I/O expansion board option is installed). Readings In the Main Menu, choose Diagnostics > Analog Input Readings. ● Thermo Fisher Scientific Model 48i Instruction Manual 3-65...

  • Page 104: Analog Input Voltages

    In the Main Menu, choose Diagnostics > Relay States. ● Press to toggle and set the relay state to open or closed for the ● selected digital output. 3-66 Model 48i Instruction Manual Thermo Fisher Scientific...

  • Page 105: Test Analog Outputs

    NORMAL  SET TO FULL SCALE  SET TO ZERO  RESET TO NORMAL RANGE DIAGS ALARM Instrument The Instrument Configuration screen displays information on the hardware configuration of the instrument. Configuration Thermo Fisher Scientific Model 48i Instruction Manual 3-67...

  • Page 106: Contact Information

    The O Concentration Alarm menu item is only displayed if the internal O sensor option is installed. The motherboard status, interface board status, and I/O Expansion board status 3-68 Model 48i Instruction Manual Thermo Fisher Scientific...

  • Page 107: Internal Temperature

    The minimum and Temperature Limits maximum internal temperature screens function the same way. In the Main Menu, choose Alarms > Internal Temp > Min or Max. ● Thermo Fisher Scientific Model 48i Instruction Manual 3-69...

  • Page 108: Bench Temperature

    The Pressure screen displays the current reaction chamber pressure reading and sets the minimum and maximum alarm limits. Acceptable alarm limits range from 250 to 1,000 mmHg. If the pressure reading goes beyond either 3-70 Model 48i Instruction Manual Thermo Fisher Scientific...

  • Page 109: Sample Flow

    Run screen and in the Main Menu. In the Main Menu, choose Alarms > Sample Flow. ● SAMPLE FLOW: ACTUAL 0.750 L/min >MIN 0.350 L/min 1.500 L/min RANGE DIAGS ALARM Thermo Fisher Scientific Model 48i Instruction Manual 3-71...

  • Page 110: Bias Voltage

    In the Main Menu, choose Alarms > Bias Voltage > Min or Max. ● BIAS VOLTAGE: ACTUAL MIN: -130 V SET MIN TO: -120 V  INC/DEC SAVE VALUE RANGE DIAGS ALARM 3-72 Model 48i Instruction Manual Thermo Fisher Scientific...

  • Page 111: Agc Intensity

    The Motor Speed screen (read only) displays the current motor speed. A reading other than 100.0% indicates a problem with either the motor or the power supply. In the Main Menu, choose Alarms > Motor Speed. ● Thermo Fisher Scientific Model 48i Instruction Manual 3-73...

  • Page 112: Zero And Span Check

    The zero and span auto calibration screens are visible only if the zero/span check option is enabled and the zero or span cal reset function is enabled and the zero and span cal reset function is enabled. 3-74 Model 48i Instruction Manual Thermo Fisher Scientific...

  • Page 113: Concentration

    In the Main Menu, choose Alarms > Concentration > Min or Max. ● CONCENTRATION: ACTUAL MIN: 10000 SET MIN TO: 0100.000  MOVE CURSOR  CHANGE VALUE SAVE RANGE DIAGS ALARM Thermo Fisher Scientific Model 48i Instruction Manual 3-75...

  • Page 114: O 2 Concentration

    Concentration alarm limit screen is used to change the Concentration Limits minimum oxygen concentration alarm limit. The minimum and maximum concentration screens function the same way. In the Main Menu, choose Alarms > O2 Concentration > Min or Max. ● 3-76 Model 48i Instruction Manual Thermo Fisher Scientific...

  • Page 115: Min Trigger

    “EXT ALARMS” from the Other Measurements list. In the Main Menu, choose Alarms > External Alarms. ● ALARMS: EXTERNAL ALARM 1 EXTERNAL ALARM 2 EXTERNAL ALARM 3 RANGE DIAGS ALARM Thermo Fisher Scientific Model 48i Instruction Manual 3-77...

  • Page 116: Service Menu

    For more information on the service mode, see “Service Mode” earlier in this chapter. In the Main Menu, choose Service > Range Mode Select. ● 3-78 Model 48i Instruction Manual Thermo Fisher Scientific...

  • Page 117: Pressure Calibration

    ▲ Note Wait at least 30 seconds for the reading to stabilize before saving the value. ▲ In the Main Menu, choose Service > Pressure Calibration > Zero. ● Thermo Fisher Scientific Model 48i Instruction Manual 3-79...

  • Page 118: Calibrate Pressure Zero

    In the Main Menu, choose Service > Pressure Calibration > Set ● Defaults. 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 3-80 Model 48i Instruction Manual Thermo Fisher Scientific...

  • Page 119: Flow Calibration

    0.000 L/min ? DISCONNECT PUMP AND SAVE CURRENT FLOW RANGE DIAGS ALARM Calibrate Flow Span The Calibrate Flow Span screen allows the user to view and set the flow sensor calibration span point. Thermo Fisher Scientific Model 48i Instruction Manual 3-81...

  • Page 120: Restore Default Flow Calibration

    1.14 and 1.18. Note This adjustment should only be performed by an instrument service technician. ▲ In the Main Menu, choose Service > Initial S/R Ratio. ● 3-82 Model 48i Instruction Manual Thermo Fisher Scientific...

  • Page 121: Multi-Point Calibration

    The Calibrate Point 1 screen allows the user to view and set the selected calibration point. The calibrate 2 and calibrate 3 screens function the same way. In the Main Menu, choose Service > Multipoint Cal > Calibrate 1, 2 ● or 3. Thermo Fisher Scientific Model 48i Instruction Manual 3-83...

  • Page 122: Coefficients

    For more information on the service mode, see “Service Mode” earlier in this chapter. Note This adjustment should only be performed by an instrument service technician. ▲ 3-84 Model 48i Instruction Manual Thermo Fisher Scientific...

  • Page 123: Temperature Calibration

    For more information on the service mode, see “Service Mode” earlier in the chapter. Note This adjustment should only be performed by an instrument service technician. ▲ Thermo Fisher Scientific Model 48i Instruction Manual 3-85...

  • Page 124: Analog Output Calibrate Zero

    “set output to:” field, in either V or mA, depending on the selected output channel. In the Main Menu, choose Service > Analog Out Cal > select Channel ● > Calibrate Full Scale. 3-86 Model 48i Instruction Manual Thermo Fisher Scientific...

  • Page 125: Analog Input Calibration

    The Analog Input Calibrate Zero screen allows the user to calibrate the zero state of the selected analog input. Zero In the Main Menu, choose Service > Analog Input Cal > select Channel ● > Calibrate Zero. Thermo Fisher Scientific Model 48i Instruction Manual 3-87...

  • Page 126: Analog Input Calibrate Full-Scale

    C is the corrected concentration (CO comp COR) that may be used for analog outputs or datalogging. In the Main Menu, choose > Instrument Controls > O2 Correction ● Conc. 3-88 Model 48i Instruction Manual Thermo Fisher Scientific...

  • Page 127: Dilution Ratio

    In the Main Menu, choose Service > Setup Run Screens. ● SELECT RUN SCREEN: >RUN SCREEN 1 RUN SCREEN 2 RUN SCREEN 3 RUN SCREEN 4  RUN SCREEN 5 RANGE DIAGS ALARM START SCREEN  DEFAULT Thermo Fisher Scientific Model 48i Instruction Manual 3-89...

  • Page 128: Edit Run Screen

    For example, if Run screens 2 and 3 are set to Off, scrolling down through the available Run screen displays will display only Run screens 1, 4, and 5. Note You cannot scroll through Run screens when a menu screen is displayed. ▲ 3-90 Model 48i Instruction Manual Thermo Fisher Scientific...

  • Page 129: Number Of Items

    Item 1 is displayed at the top of the list. If “None” is selected, the associated item will not be displayed on the Run screen. In the Main Menu, choose Service > Setup Run Screens > select a Run ● Screen > Item 1-10. Thermo Fisher Scientific Model 48i Instruction Manual 3-91...

  • Page 130: Concentrations

    In the Main Menu, choose Service > Setup Run Screen > select a Run ● Screen > select Run Screen Item > Corrected Concentrations. CORRECTED CONCENTRATIONS: >NONE CO COR <-- LO CO COR HI CO COR RANGE DIAGS ALARM 3-92 Model 48i Instruction Manual Thermo Fisher Scientific...

  • Page 131: Display Pixel Test

    The display pixel test is visible only when the instrument is in service mode. For more information on the service mode, see “Service Mode” earlier in the chapter. Thermo Fisher Scientific Model 48i Instruction Manual 3-93...

  • Page 132: Restore User Defaults

    The items visible under the Password menu are determined by the instrument’s password status. In the Main Menu, choose Password. ● PASSWORD MENU: >SET PASSWORD LOCK INSTRUMENT CHANGE PASSWORD REMOVE PASSWORD UNLOCK INSTRUMENT RANGE DIAGS ALARM 3-94 Model 48i Instruction Manual Thermo Fisher Scientific...

  • Page 133: Set Password

    Refer to “C-Link Protocol Commands” appendix for detailed information about “mode”, “allow mode”, and “power up mode” commands. Thermo Fisher Scientific Model 48i Instruction Manual 3-95...

  • Page 134: Change Password

    The unlock instrument screen is shown if the instrument is locked. In the Main Menu, choose Password > Unlock Instrument ● ENTER THE PASSWORD: RANGXXXXXE ABCDEFGHIJKLMN BKSP OPQRSTUVWXYZ PAGE 0123456789 ./- SAVE RANGE DIAGS ALARM 3-96 Model 48i Instruction Manual Thermo Fisher Scientific...

  • Page 135: Calibration

    So cylinder zero air should be scrubbed of the residual CO prior to its use in the Model 48i as a dilution gas or a zero standard. Room air which has been scrubbed of CO can also be used as the zero air source.

  • Page 136: Compression

    25 °C and 760 mmHg, and that care should be exercised in correcting for water vapor content. Pressure Regulator for The regulator used must have a nonreactive diaphragm and internal parts, as well as a suitable delivery pressure. CO Standard Cylinder Model 48i Instruction Manual Thermo Fisher Scientific...

  • Page 137: Mixing Chamber

    Perform the service checks of the “Preventive Maintenance” chapter. Select the operating range and the averaging time of the Model 48i. Note The averaging time should be less than the zero duration and less than the span duration. ▲...

  • Page 138: Figure 4-1. Calibration Flow Schematic

    Figure 4–1. Calibration Flow Schematic Zero Adjust Use the following procedure to set the CO reading to zero. 1. Allow sufficient time for the Model 48i to warm up and stabilize. 2. Adjust the dilution system of Figure 4–1 so that zero air alone is present in the manifold.
  • Page 139 (percent scale) = (([CO] x 100)/URL) + Z Where: URL = nominal upper range limit of the instrument operating range = instrument response to zero air, %scale 5. Record the CO concentration and the instrument’s response. Thermo Fisher Scientific Model 48i Instruction Manual...

  • Page 140: Calibration Frequency

    The Quality Assurance Handbook should be referred to for the cylinder checking procedure. Compute the span error from the following equation:    Reported Concentrat Actual Concentrat      Actual Concentrat Model 48i Instruction Manual Thermo Fisher Scientific...

  • Page 141: Hi And Lo Multi-Point Calibration

    (URL) of the instrument. The total air flow must exceed the total demand of the analyzer connected to the output manifold to ensure that no ambient air is pulled into the manifold vent. The exact CO concentration is calculated from: Thermo Fisher Scientific Model 48i Instruction Manual...
  • Page 142 = flow rate of CO standard corrected to 25 °C and 760 mmHg, L/min = flow rate of dilution air corrected to 25 °C and 760 mmHg, L/min 2. Allow the Model 48i to sample this CO concentration standard until a stable response is obtained.

  • Page 143: References

    Section 12 also provides information on “Calibration of Primary and Secondary Standards for Flow Measurements”. Specific information on certification of concentration standards is given in EPA-600/R93/224, EPA Traceability Protocol for Assay and Certification of Gaseous Calibration Standards, 1993 Available from www.NTIS.gov (PB94130424). Thermo Fisher Scientific Model 48i Instruction Manual...

  • Page 145: Chapter 5 Preventive Maintenance

    Read the safety precautions before beginning any procedures in this chapter. Precautions WARNING If the equipment is operated in a manner not specified by the manufacturer, the protection provided by the equipment may be impaired. ▲ Thermo Fisher Scientific Model 48i Instruction Manual...

  • Page 146: Replacement Parts

    Use the following procedure to clean the mirrors. 1. Turn off power and disconnect power line. 2. Remove the field mirror by removing the four Allen head screws holding it to the main bench (use a 9/64-inch Allen wrench). Model 48i Instruction Manual Thermo Fisher Scientific...

  • Page 147: Ir Source Replacement

    After cleaning the optics, the IR light intensities remain below 100,000 ● It is not necessary to recalibrate the Model 48i after replacing the IR source since it is a ratio instrument, and replacing the IR source does not affect the calibration.

  • Page 148: Figure 5-1. Inspecting And Cleaning The Fan

    If the pump diaphragm is in good condition and the capillary not blocked, it should take less than one minute from the time the inlet is plugged to the time the reading below 250 mmHg is obtained. Model 48i Instruction Manual Thermo Fisher Scientific...

  • Page 149: Leaks Across The Optional Zero/Span And Sample Solenoid Valves

    3. The aluminum compressor housing cover must be removed to gain access to the inside compressor housing. Remove the four screws and then remove the cover. Re-use any gasketing. Remove any debris that may have accumulated in the bottom of the compressor housing. Thermo Fisher Scientific Model 48i Instruction Manual...
  • Page 150 Note that the quantity and thickness of the shim ring(s) will vary from pump to pump. Parts removed must be replaced exactly as found. If repairing multiple pumps, take care not to mix the parts. Model 48i Instruction Manual Thermo Fisher Scientific...

  • Page 151: Figure 5-2. Rebuilding The Pump (New Technology)

    Preventive Maintenance Pump Rebuilding Figure 5–2. Rebuilding the Pump (New Technology) Thermo Fisher Scientific Model 48i Instruction Manual...

  • Page 152: Assembly With New Diaphragm And Valve

    6-7 inch-lbs. Turn the fan by hand to confirm that the pump turns freely. 5. Replace the compressor housing cover and gasket. Install the four cover screws. No not over-tighten. Model 48i Instruction Manual Thermo Fisher Scientific...

  • Page 153: Figure 5-3. Rebuilding The Pump

    6. Perform the “Leak Test and Pump Check Out” on page 5-4. Top Plate Flapper Plate Bottom Plate Diaphragm Figure 5–3. Rebuilding the Pump Thermo Fisher Scientific Model 48i Instruction Manual...

  • Page 155: Chapter 6 Troubleshooting

    The troubleshooting guides presented in this chapter are designed to help isolate and identify instrument problems. Guides Table 6–1 provides general troubleshooting information and indicates the checks that you should perform if you experience an instrument problem. Thermo Fisher Scientific Model 48i Instruction Manual...

  • Page 156: Table 6-1. Troubleshooting - General Guide

    Clean cells and flow components. Leaky correlation wheel Replace with a known good wheel. Analog test ramp Faulty recorder Replace recorder. D/A calibration off Re-calibrate the D/A with a DMV known to be in calibration. Model 48i Instruction Manual Thermo Fisher Scientific...

  • Page 157: Table 6-2. Troubleshooting - Alarm Messages

    Defective measurement Replace measurement interface board interface board. Defective pre-amp board Replace pre-amp board. Alarm - AGC intensity Pre-amp Gain not set Check Gain adjustment. properly Defective measurement Replace measurement interface board interface board. Thermo Fisher Scientific Model 48i Instruction Manual...
  • Page 158 Internal cables not Check that all internal cables connected properly are connected properly. Alarm - Interface Status Recycle AC power to Board is defective Alarm - I/O Exp Status instrument. If still alarming, change board. Model 48i Instruction Manual Thermo Fisher Scientific...

  • Page 159: Figure 6-1. Board-Level Connection Diagram - Common Electronics

    3 Cond 2 Pin FRONT PANEL POWER SW TR ANSF O R ME R 3 Pin (90V AC or 240V AC O P TIO NS) Figure 6–1. Board-Level Connection Diagram - Common Electronics Thermo Fisher Scientific Model 48i Instruction Manual...

  • Page 160: Figure 6-2. Board-Level Connection Diagram - Measurement System

    2 Pin 2 Pin O2 SENSOR (Optional) 16 Pin AC O2 (N ot Used) 3 Pin AC BENCH 4 Pin 3 Pin AC PUMP 3 Pin Figure 6–2. Board-Level Connection Diagram - Measurement System Model 48i Instruction Manual Thermo Fisher Scientific...

  • Page 161: Table 6-3. Motherboard Connector Pin Descriptions

    +RS485 to Interface Board -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 Thermo Fisher Scientific Model 48i Instruction Manual...
  • Page 162 Power Fail Relay N.O. Contact Digital Ground TTL Input 3 TTL Input 4 TTL Input 6 Digital Ground TTL Input 9 TTL Input 11 TTL Input 12 TTL Input 14 TTL Input 16 Digital Ground Model 48i Instruction Manual Thermo Fisher Scientific...
  • Page 163 Reset-Proc 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 Ground Ground Thermo Fisher Scientific Model 48i Instruction Manual...
  • Page 164 LD7 – LCD Signal LD3 – LCD Signal LCD Bias Voltagel Ground Ground LCD_ONOFF – LCD Signal Keypad Row 2 Input Keypad Row 1 Input Keypad Row 4 Input Keypad Row 3 Input 6-10 Model 48i Instruction Manual Thermo Fisher Scientific...
  • Page 165 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 AC-Ground AC 24VPWR AC-HOT AC-NEUT AC-Ground Thermo Fisher Scientific Model 48i Instruction Manual 6-11...

  • Page 166: Table 6-4. Measurement Interface Board Connector Pin Descriptions

    Ambient Temperature Thermistor Ground Optical Pickup Input Ground Optical Pickup Source Drive PREAMP BD Preamp Signal Input Ground for Shield Ground SPI – Data Out SPI - CLK SPI - CS +15V 6-12 Model 48i Instruction Manual Thermo Fisher Scientific...
  • Page 167 Chamber Pressure Sensor Input Ground +15V -15V FLOW Sample Flow Sensor Input Ground +15V -15V Ground FLOW SW Ground Purge Flow Input O2 SENS Ground Ground Analog Input O2 Sensor Analog Input O2 Sensor Temperature Thermo Fisher Scientific Model 48i Instruction Manual 6-13...

  • Page 168: Table 6-5. Front Panel Board Connector Pin Diagram

    Table 6–5. Front Panel Board Connector Pin Diagram Connector Reference Signal Description Label Designator MOTHERBOARD Ground Ground LCLK – LCD Signal Ground Ground LLP – LCD Signal LFLM – LCD Signal LD4 – LCD Signal 6-14 Model 48i Instruction Manual Thermo Fisher Scientific...
  • Page 169 +24V +24V LCD DATA LD0_5V – LCD Signal LD1_5V – LCD Signal LD2_5V – LCD Signal LD3_5V – LCD Signal LCD_ONOFF_5V – LCD Signal LFLM_5V – LCD Signal LLP_5V – LCD Signal Thermo Fisher Scientific Model 48i Instruction Manual 6-15...

  • Page 170: Table 6-6. I/O Expansion Board (Optional) Connector Pin Descriptions

    Analog Voltage Input 1 Analog Voltage Input 2 Analog Voltage Input 3 Ground Analog Voltage Input 4 Analog Voltage Input 5 Analog Voltage Input 6 Ground Analog Voltage Input 7 Analog Voltage Input 8 Ground 6-16 Model 48i Instruction Manual Thermo Fisher Scientific...

  • Page 171: Table 6-7. Digital Output Board Connector Pin Descriptions

    Ground +RS485 to Motherboard -RS485 to Motherboard Table 6–7. Digital Output Board Connector Pin Descriptions Connector Reference Signal Description Label Designator MOTHER BD +24V +24V Ground Ground Ground SPI Reset SPI Input Thermo Fisher Scientific Model 48i Instruction Manual 6-17...
  • Page 172 Relay 3 Contact b Relay 4 Contact b Relay 5 Contact b Relay 6 Contact b Relay 7 Contact b Relay 8 Contact b Relay 9 Contact b Relay 10 Contact b +24V 6-18 Model 48i Instruction Manual Thermo Fisher Scientific...

  • Page 173: Table 6-8. Pre-Amp Board Connector Pin Descriptions

    SPI - CLK SPI - CS +15V +18V for IR Source -100V +18V for IR Source IR Source Return IR Detector Return IR Detector Cooler + IR Detector Cooler - IR Detector IR Detector Thermo Fisher Scientific Model 48i Instruction Manual 6-19...

  • Page 174: Service Locations

    For additional assistance, service is available from exclusive distributors worldwide. Contact one of the phone numbers below for product support Locations and technical information or visit us on the web at www.thermo.com/aqi. 1-866-282-0430 Toll Free 1-508-520-0430 International 6-20 Model 48i Instruction Manual Thermo Fisher Scientific...

  • Page 175: Chapter 7 Servicing

    Chapter 7 Servicing This chapter explains how to replace the Model 48i subassemblies. It assumes that a subassembly has been identified as defective and needs to be replaced (or is an “expendable” item, not covered under warranty. Expendable items are indicated with an asterisk (*) in the “Model 48i...
  • Page 176 Replacement” on page 7-37 ● “Measurement Interface Board Replacement” on page 7-38 ● “Front Panel Board Replacement” on page 7-39 ● “LCD Module Replacement” on page 7-40 ● “Service Locations” on page 7-41 ● Model 48i Instruction Manual Thermo Fisher Scientific...

  • Page 177: Safety Precautions

    LCD module, but rather 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. ▲ Thermo Fisher Scientific Model 48i Instruction Manual...

  • Page 178: Figure 7-1. Properly Grounded Antistatic Wrist Strap

    > to return to the Main Menu. 4. Return to the procedure. Replacement Table 7–1 lists the replacement parts for the Model 48i major subassemblies. Refer to Table 7–2 to identify the component location. Parts List Table 7–1. Model 48i Replacement Parts...
  • Page 179 Optical Switch 7412 Field Mirror 7413 Entrance Mirror 7414 Exit Mirror 7358 Filter, Wheel Assembly 101427-00 Chopper Motor 104678-00 Sensor 4119 Capillary 0.008-inch ID (O sensor option) *Expendable item, not covered by warranty Thermo Fisher Scientific Model 48i Instruction Manual...

  • Page 180: Table 7-2. Model 48I Cables

    Servicing Cable List Cable List Table 7–2 describes the Model 48i cables. See the “Troubleshooting” chapter for associated connection diagrams and board connector pin descriptions. Table 7–2. Model 48i Cables Part Number Description 101036-00 DC Power Supply, 24V Output 101037-00...

  • Page 181: Figure 7-2. Component Layout

    IR Source Cover Optical Bench Detector Assy and Pre-Amp O2 Sensor Thermistor (Optional) I/O Expansion Board (Opt) Front Panel Digital Output Board Front Panel Board Measurement Interface Board Motherboard Power Supply Figure 7–2. Component Layout Thermo Fisher Scientific Model 48i Instruction Manual...

  • Page 182: Figure 7-3. Removing The Measurement Case Assembly And Lowering The Partition Panel

    ▲ 1. Turn the instrument OFF and unplug the power cord. 2. If the instrument is mounted in a rack, remove it from the rack. Model 48i Instruction Manual Thermo Fisher Scientific...

  • Page 183: Fuse Replacement

    1. Turn the instrument OFF and unplug the power cord. 2. Remove fuse drawer, located on the AC power connector. 3. If either fuse is blown, replace both fuses. 4. Insert fuse drawer and reconnect power cord. Thermo Fisher Scientific Model 48i Instruction Manual...

  • Page 184: Fan/Filter Replacement

    5. Remove the four fan mounting screws along with nuts and washers and remove the fan. 6. Install a new fan following the previous steps in reverse order. 7-10 Model 48i Instruction Manual Thermo Fisher Scientific...

  • Page 185: Figure 7-4. Replacing The Fan

    3. Loosen both clamp screws from the IR source mounting posts and remove IR source. 4. Install a new IR source by following the previous steps in reverse. Ensure that the IR source element is evenly spaced between the mounting posts. Thermo Fisher Scientific Model 48i Instruction Manual 7-11...

  • Page 186: Figure 7-5. Replacing The Ir Source

    Allen wrenches, 5/32-inch and 5/64-inch Philips screwdriver Equipment Damage Some internal components can be damaged by small amounts of static electricity. A properly grounded antistatic wrist strap must be worn while handling any internal component. ▲ 7-12 Model 48i Instruction Manual Thermo Fisher Scientific...

  • Page 187: Figure 7-6. Removing The Motor

    7. Let the instrument sample zero air for about 90 minutes. 8. From the Main Menu, choose Service > Initial S/R Ratio. The Initial S/R Ratio screen appears. Thermo Fisher Scientific Model 48i Instruction Manual 7-13...

  • Page 188: Chopper Motor Replacement

    5. Install the filter wheel on the motor shaft, make sure that the set screw seats on the flat of the motor shaft, and tighten the set screw. 6. Calibrate the instrument. Refer to the “Calibration” chapter in this manual. 7-14 Model 48i Instruction Manual Thermo Fisher Scientific...

  • Page 189: Optical Bench Replacement

    4. Remove the four screws holding the optical bench to the shock mounts and carefully remove the optical bench. 5. Replace the optical bench by following the previous steps in reverse. 6. Calibrate the instrument. Refer to the “Calibration” chapter in this manual. Thermo Fisher Scientific Model 48i Instruction Manual 7-15...

  • Page 190: Figure 7-7. Replacing The Optical Bench

    3. Turn the optical bench over, remove the two screws securing the optical switch assembly to the case, and remove the optical switch. 4. Install the new optical switch by following the previous steps in reverse. 7-16 Model 48i Instruction Manual Thermo Fisher Scientific...

  • Page 191: Figure 7-8. Replacing The Optical Switch (Inverted View)

    ▲ 1. Turn the instrument OFF, unplug the power cord, and remove the cover. 2. Remove the optical bench following the “Optical Bench Replacement” procedure in this chapter. Thermo Fisher Scientific Model 48i Instruction Manual 7-17...

  • Page 192: Detector/Preamplifier Assembly Replacement

    1. Turn the instrument OFF, unplug the power cord, and remove the cover. 2. Disconnect the cable from the PREAMP connector on the measurement interface board and disconnect the two wires from the top of the chopper motor plate. 7-18 Model 48i Instruction Manual Thermo Fisher Scientific...

  • Page 193: Figure 7-9. Replacing The Detector/Preamplifier Assembly

    At the Initial S/R Ratio screen, press to select set the initial S/R ratio to the value of the current ratio and press to store the value. The initial S/R ratio should be between 1.14 and 1.18. Thermo Fisher Scientific Model 48i Instruction Manual 7-19...

  • Page 194: Preamp Board Calibration

    A properly grounded antistatic wrist strap must be worn while handling any internal component. ▲ 1. Turn the instrument OFF, unplug the power cord, and remove the cover. 7-20 Model 48i Instruction Manual Thermo Fisher Scientific...

  • Page 195: Figure 7-10. Replacing The Pump

    Pump Mounting Screws (2) (Bottom) Figure 7–10. Replacing the Pump Pressure Transducer Use the following procedure to replace the pressure transducer (Figure 7– 11). Replacement Equipment Required: Pressure transducer Philips screwdriver, #2 Thermo Fisher Scientific Model 48i Instruction Manual 7-21...

  • Page 196: Figure 7-11. Replacing The Pressure Transducer

    Use the following procedure to calibrate the pressure transducer. Calibration Note An error in the zero setting of the pressure transducer does not introduce a measurable error in the output concentration reading. 7-22 Model 48i Instruction Manual Thermo Fisher Scientific...
  • Page 197 “Accessing the Service Mode” on page 7-4, then return to the beginning of this step. ▲ 4. At the Pressure Sensor Cal screen, press to select Zero. The Calibrate Pressure Zero screen appears. Thermo Fisher Scientific Model 48i Instruction Manual 7-23...

  • Page 198: Flow Transducer Replacement

    2. Disconnect flow transducer cable from the FLOW connector on the measurement interface board (Figure 7–2). 3. Disconnect the plumbing connections from the flow transducer. Note the plumbing connections to facilitate reconnection. 7-24 Model 48i Instruction Manual Thermo Fisher Scientific...

  • Page 199: Figure 7-12. Replacing The Flow Transducer

    A properly grounded antistatic wrist strap must be worn while handling any internal component. ▲ 1. Remove the instrument cover. 2. Disconnect the pump cable from AC PUMP connector on the measurement interface board. Thermo Fisher Scientific Model 48i Instruction Manual 7-25...

  • Page 200: Capillary Cleaning Or Replacement

    11. Install the cover. Capillary Cleaning Use the following procedure to clean or replace the capillary (Figure 7–13). or Replacement Equipment Required: Wrench, 5/8-inch Capillary Capillary cleaning wire (smaller than 0.015-inch) 7-26 Model 48i Instruction Manual Thermo Fisher Scientific...

  • Page 201: Figure 7-13. Cleaning Or Replacing The Capillary

    4. Install the capillary by following the previous steps in reverse. Optional Zero/Span Use the following procedure to replace the solenoid. and Sample Solenoid Equipment Required: Valve Replacement Solenoid Philips screwdriver, #2 Wrench, 9/16-inch Thermo Fisher Scientific Model 48i Instruction Manual 7-27...

  • Page 202: Analog Output Testing

    2. From the Main Menu, choose Diagnostics > Test Analog Outputs. The Test Analog Outputs screen appears. 3. Press to scroll to the desired channel corresponding to the rear panel terminal pins where the meter is connected, and press 7-28 Model 48i Instruction Manual Thermo Fisher Scientific...

  • Page 203: Figure 7-14. Rear Panel Analog Input And Output Pins

    “Analog Output Calibration” procedure that follows. 8. Press to reset the analog outputs to normal. Current Outputs Analog Voltage Inputs Analog Voltage Outputs Figure 7–14. Rear Panel Analog Input and Output Pins Thermo Fisher Scientific Model 48i Instruction Manual 7-29...

  • Page 204: Table 7-4. Analog Output Channels And Rear Panel Pin Connections

    Use the following procedure to calibrate the analog outputs if a meter reading in the “Analog Output Testing” procedure differed by more than Calibration one percent or after replacing the optional I/O expansion board. Equipment Required: Multimeter 7-30 Model 48i Instruction Manual Thermo Fisher Scientific...

  • Page 205: Analog Input Calibration

    Calibrating the Input Use the following procedure to calibrate the input channels to zero volts. Channels to Zero Volts Thermo Fisher Scientific Model 48i Instruction Manual 7-31...

  • Page 206: Calibrating The Input Channels To Full-Scale

    Table 7–5 identifies the associated channels. 2. From the Main Menu, choose Service > Analog Input Calibration. The Analog Input Cal screen displays input channels 1-8. 7-32 Model 48i Instruction Manual Thermo Fisher Scientific...

  • Page 207: Ambient Temperature Calibration

    Note Since the thermistors are interchangeable to an accuracy of ±0.2 °C, and have a value of 10K ohms at 25 °C, an alternate procedure is to connect an accurately known 10K resistor to the thermistor input (AMB Thermo Fisher Scientific Model 48i Instruction Manual 7-33...

  • Page 208: I/O Expansion Board (Optional) Replacement

    A properly grounded antistatic wrist strap must be worn while handling any internal component. ▲ 1. Turn the instrument OFF, unplug the power cord, and remove the cover. 7-34 Model 48i Instruction Manual Thermo Fisher Scientific...

  • Page 209: Figure 7-15. Replacing The I/O Expansion Board (Optional)

    Mounting Studs Motherboard Digital Output Board I/O Expansion Board (Opt) Figure 7–15. Replacing the I/O Expansion Board (Optional) Standoffs (2) I/O Expansion Board Motherboard Digital Output Board Figure 7–16. Rear Panel Board Connectors Thermo Fisher Scientific Model 48i Instruction Manual 7-35...

  • Page 210: Internal O 2 Sensor (Optional) Replacement

    Nut driver, 3/16-inch Equipment Damage Some internal components can be damaged by small amounts of static electricity. A properly grounded antistatic wrist strap must be worn while handling any internal component. ▲ 7-36 Model 48i Instruction Manual Thermo Fisher Scientific...

  • Page 211: Motherboard Replacement

    Expansion Board (Optional) Replacement” on page 7-34. 3. Remove the digital output board. See “Digital Output Board Replacement” on page 7-36. 4. Unplug all connectors from the motherboard. Note connector locations to facilitate reconnection. Thermo Fisher Scientific Model 48i Instruction Manual 7-37...

  • Page 212: Measurement Interface Board Replacement

    4. To install the measurement interface board, follow the previous steps in reverse. 5. Re-install the measurement case assembly. Refer to “Removing the Measurement Case Assembly and Lowering the Partition Panel” on page in this chapter. 7-38 Model 48i Instruction Manual Thermo Fisher Scientific...

  • Page 213: Figure 7-17. Replacing The Measurement Interface 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 the previous steps in reverse. Thermo Fisher Scientific Model 48i Instruction Manual 7-39...

  • Page 214: Figure 7-18. Replacing The Front Panel Board And The Lcd Module

    Do not remove the LCD panel or frame from the LCD module. ▲ The LCD polarizing plate is very fragile, handle it carefully. ▲ Do not wipe the LCD polarizing plate with a dry cloth, as it may easily scratch the plate. ▲ 7-40 Model 48i Instruction Manual Thermo Fisher Scientific...

  • Page 215: Service Locations

    For additional assistance, service is available from exclusive distributors worldwide. Contact one of the phone numbers below for product support and technical information or visit us on the web at www.thermo.com/aqi. 1-866-282-0430 Toll Free 1-508-520-0430 International Thermo Fisher Scientific Model 48i Instruction Manual 7-41...

  • Page 217: Chapter 8 System Description

    “Hardware” on page ● “Firmware” on page ● “Electronics” on page ● “I/O Components” on page ● Hardware Model 48i hardware components (Figure 8–1) include: Optical bench ● Band-pass filter ● Bench heater board ● Chopper motor ● Optical pickup ●...

  • Page 218: Figure 8-1. Hardware Components

    This assembly is used for maintaining the optical bench at a constant temperature. Chopper Motor The chopper motor spins the gas filter wheel and chopper disk at a uniform speed. Model 48i Instruction Manual Thermo Fisher Scientific...

  • Page 219: Optical Pickup

    The purge flow switch monitors the flow of purge gas when the filter wheel purge gas option is installed. (optional) Firmware The processor firmware tasks are organized into four areas: Instrument control ● Monitoring signals ● Measurement calculations ● Output communication ● Thermo Fisher Scientific Model 48i Instruction Manual...

  • Page 220: Instrument Control

    Negative concentrations can be represented as long as they are within -5% of full-scale. The zero and span values may be set by the user to any desired value. Model 48i Instruction Manual Thermo Fisher Scientific...

  • Page 221: Electronics

    I/O connector with Power Fail Relay, 16 Digital Inputs, and 6 Analog ● Voltage Outputs. Internal connectors: Function Key Panel and Display ● Measurement Interface Board ● I/O Expansion Board ● Digital Output Board ● AC Distribution ● Thermo Fisher Scientific Model 48i Instruction Manual...

  • Page 222: Measurement Interface Board

    The pressure sensor assembly consists of a board containing an instrumentation amplifier and a pressure transducer with a gas input Assembly fitting. The pressure transducer output is produced by measuring the pressure difference between the sample gas pressure and ambient air pressure. Model 48i Instruction Manual Thermo Fisher Scientific...

  • Page 223: Bench Heater Board

    This board also includes signal buffers for the graphics display control signals and a high voltage power supply for the graphics display backlight. Thermo Fisher Scientific Model 48i Instruction Manual...

  • Page 224: I/O Components

    The user can calibrate each analog output zero and span point through firmware. At least 5% of full-scale over and under range are also supported, but may be overridden in the firmware, if required. Model 48i Instruction Manual Thermo Fisher Scientific...

  • Page 225: Analog Voltage Inputs (Optional)

    The actual use of these inputs will vary based on analyzer configuration. The digital inputs are TTL level compatible and are pulled up within the analyzer. The active state can be user defined in firmware. Thermo Fisher Scientific Model 48i Instruction Manual...

  • Page 226: Table 8-1. Rs-232 Db9 Connector Pin Configuration

    No, odd, or even parity All responses are terminated with a carriage return (hex 0D) Refer to Table 8–1 for the DB9 connector pin configuration. Table 8–1. RS-232 DB9 Connector Pin Configuration DB9 Pin Function Ground 8-10 Model 48i Instruction Manual Thermo Fisher Scientific...

  • Page 227: Table 8-2. Rs-485 Db9 Connector Pin Configuration

    Any serial port protocols may be accessed over Ethernet in addition to the serial port. Up to three simultaneous connections are allowed per protocol. External Accessory The external accessory connector is not used in the Model 48i analyzer. Connector 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 229: Mounting Options

    CO readings for the amount of oxygen in the sample. Selectable O concentrations can be used as the correction factor. Figure 9–1 shows how this option is integrated with the Model 48i with and without the zero/span option. Thermo Fisher Scientific Model 48i Instruction Manual...

  • Page 230: Figure 9-1. Flow Diagram, Internal O 2 Sensor

    Note The total airflow of the calibration gases must exceed the total demand of the analyzer. The Model 48i requires approximately 1000 cc/min of sample flow, so a total airflow of at least 1100 cc/min is recommended.

  • Page 231: Alternate Sensor Calibration

    7. Use the screwdriver to adjust the coarse span potentiometer RV3 such that the O reading is 20% greater than the calibration gas value. For example, 25% O span gas should be set to produce an output of 30.00% O Thermo Fisher Scientific Model 48i Instruction Manual...

  • Page 232: Figure 9-2. Purge Housing Assembly

    This option increases reliability in the presence of contaminants that could interfere with the analytical process. Motor Plate Purge Wheel Housing Figure 9–2. Purge Housing Assembly Model 48i Instruction Manual Thermo Fisher Scientific...

  • Page 233: Calibration Note

    Teflon Particulate A 5-10 micron pore size, two-inch diameter Teflon® element is available for the Model 48i. This filter should be installed just prior to the SAMPLE Filter bulkhead. When using a filter, all calibrations and span checks must be performed through the filter.

  • Page 234: Table 9-1. Cable Options

    Table 9–2. Color Codes for 25-Pin and 37-Pin Cables Color Color BLACK RED/BLACK BROWN ORANGE/BLACK YELLOW/BLACK ORANGE GREEN/BLACK YELLOW GRAY/BLACK GREEN PINK/BLACK BLUE End color codes for 25-pin cables continue for 37-pin cables. Model 48i Instruction Manual Thermo Fisher Scientific...

  • Page 235: Table 9-3. Mounting Options

    EIA-rack mounting handles. This configuration is intended for direct replacement of a C-series instrument in an existing rack. The rail mounting location is lower on the case and the front mounting screw slots are in non-standard EIA locations. Thermo Fisher Scientific Model 48i Instruction Manual...

  • Page 236: Figure 9-3. Rack Mount Option Assembly

    Optional Equipment Mounting Options Figure 9–3. Rack Mount Option Assembly Model 48i Instruction Manual Thermo Fisher Scientific...

  • Page 237: Figure 9-4. Bench Mounting

    Optional Equipment Mounting Options Figure 9–4. Bench Mounting Thermo Fisher Scientific Model 48i Instruction Manual...

  • Page 238: Figure 9-5. Eia Rack Mounting

    Optional Equipment Mounting Options Figure 9–5. EIA Rack Mounting 9-10 Model 48i Instruction Manual Thermo Fisher Scientific...

  • Page 239: Figure 9-6. Retrofit Rack Mounting

    Optional Equipment Mounting Options Figure 9–6. Retrofit Rack Mounting Thermo Fisher Scientific Model 48i Instruction Manual 9-11...

  • Page 241: Appendix A Warranty

    (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 Thermo Fisher Scientific Model 48i Instruction Manual...
  • Page 242 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. Model 48i Instruction Manual Thermo Fisher Scientific...

  • Page 243: Appendix B C-Link Protocol Commands

    C-Link Protocol Commands This appendix provides a description of the C-Link protocol commands that can be used to remotely control a Model 48i 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 244: Commands

    (ASCII) character. The command in the following example begins with the ASCII character code 176 decimal, which directs the command to the Model 48i, and is terminated by a carriage return “CR” (ASCII character code 13 decimal). <ASCII 176> T I M E <CR>...

  • Page 245: Table B-1. Command Response Error Descriptions

    C-Series by placing only one digit to the Formats left of the decimal. Commands List Table B–2 lists the 48i C-Link protocol commands. The interface will respond to the command strings outlined below. Table B–2. C-Link Protocol Commands Command Description...
  • Page 246 Reports/sets sample flow alarm minimum value B-17 alarm trig conc Reports/sets current CO concentration alarm trigger sense B-17 alarm trig conc o2 Reports/sets current O concentration alarm warning value B-18 Model 48i Instruction Manual Thermo Fisher Scientific...
  • Page 247 Sets/copies current selections in scratch pad into srec list B-24 copy sp to stream Sets/copies current selections in scratch pad into stream list B-24 copy srec to sp Sets/copies current srec selection into the scratch pad B-25 Thermo Fisher Scientific Model 48i Instruction Manual...
  • Page 248 Reports current mode of sample, zero, or span B-36 gas unit Reports/sets current gas units B-37 he (help) Simulates pressing help pushbutton B-33 high avg time Reports/sets high range averaging time B-10 Model 48i Instruction Manual Thermo Fisher Scientific...
  • Page 249 CO Reports CO concentration calculated with low range B-11 coefficients low CO coef Reports/sets low range CO coefficient B-27 low coef 0 Reports coefficients of the curve developed from lo multi-point B-28 calibration Thermo Fisher Scientific Model 48i Instruction Manual...
  • Page 250 Reports temperature of the oxygen sensor B-12 Reports/sets oxygen correction (compensation) on or off B-38 B-46 power up mode Reports/sets the power up mode as local or remote pres Reports current reaction chamber pressure B-12 Model 48i Instruction Manual Thermo Fisher Scientific...
  • Page 251 B-26 temp comp Reports/sets temperature compensation on or off B-38 time Reports/sets current time (24-hour time) B-40 B-47 Reports/sets the timezone string for the network time protocol server Simulates pressing up pushbutton B-33 Thermo Fisher Scientific Model 48i Instruction Manual...

  • Page 252: Table B-3. Averaging Times

    B–3. The following example sets the low range averaging time to 120 seconds. Send: set low avg time 8 Receive: set low avg time 8 ok Table B–3. Averaging Times Averaging Time (seconds) Selection 1 seconds B-10 Model 48i Instruction Manual Thermo Fisher Scientific...
  • Page 253 15 Receive: set o2 corr conc 15 ok flow This command reports the current sample flow. The following example reports that the current sample flow is 1.108 liters/minute. Thermo Fisher Scientific Model 48i Instruction Manual B-11...
  • Page 254 If pressure compensation is off, a pressure of 760 mmHg is used as default pressure even though the actual pressure is 753.4 mmHg. The following example shows that the actual reaction chamber pressure is 753.4 mmHg. B-12 Model 48i Instruction Manual Thermo Fisher Scientific...

  • Page 255: Figure B-1. Flags Field

    AGC circuit is on, that the instrument is in the span gas mode, and that the CO high concentration alarm is activated. Send: flags Receive: flags 80068000 Figure B–1. Flags Field Thermo Fisher Scientific Model 48i Instruction Manual B-13...

  • Page 256: Alarms

    These commands report the bench temperature alarm minimum and maximum value current settings. The following example reports that the bench temperature alarm minimum value is 35.0 °C. Send: alarm chamber temp min Receive: alarm chamber temp min 35.0 deg C B-14 Model 48i Instruction Manual Thermo Fisher Scientific...
  • Page 257 These commands set the oxygen concentration alarm minimum and maximum values to value, where value is a floating-point number representing the oxygen concentration alarm limits in percent. The following example sets the O concentration alarm maximum value to 100.00%. Thermo Fisher Scientific Model 48i Instruction Manual B-15...
  • Page 258 100.2 ok alarm pressure min alarm pressure max These commands report the pressure alarm minimum and maximum value current settings. The following example reports that the pressure alarm minimum value is 650 mmHg. B-16 Model 48i Instruction Manual Thermo Fisher Scientific...
  • Page 259 Table B–4. The following example sets the CO concentration minimum alarm trigger to ceiling. Send: set alarm trig conc 1 Receive: set alarm trig conc 1 ok Thermo Fisher Scientific Model 48i Instruction Manual B-17...

  • Page 260: Table B-4. Alarm Trigger Values

    The sequence of voltages is: Positive 24, positive 15, positive 5, positive 3.3, and negative 3.3. Each voltage value is separated by a space. Send: diag volt mb Receive: diag volt mb 24.1 14.9 4.9 3.2 -3.2 B-18 Model 48i Instruction Manual Thermo Fisher Scientific...

  • Page 261: Datalogging

    Receive: clr records ok set clr lrecs set clr srecs These commands will clear only the lrecs or only the srecs that have been saved. The following example clears srecs. Thermo Fisher Scientific Model 48i Instruction Manual B-19...
  • Page 262 The following example shows the list for streaming data output. Send: list stream Receive: list stream field index variable x x time 1 10 auxt 2 13 pres 3 14 smplfl 4 15 intensity B-20 Model 48i Instruction Manual Thermo Fisher Scientific...
  • Page 263 = | 0 | 1 | 2 | : Output format (see “set lrec/srec format format” command) aa = hours (01 to 23) bb = minutes (01 to 59) oo = month (01 to 12) pp = day (01 to 31) qq = year Thermo Fisher Scientific Model 48i Instruction Manual B-21...
  • Page 264 These commands set the output format for lrecs and srecs, and erec data, according to Table B–5. The following example sets the lrec output format to ASCII with text. Send: set lrec format 1 Receive: set lrec format 1 ok B-22 Model 48i Instruction Manual Thermo Fisher Scientific...

  • Page 265: Table B-5. Record Output Formats

    = | 1 | 5 | 15 | 30 | 60 | These commands set the lrecs and srecs logging period to value in minutes. The following example sets the lrec logging period to 15 minutes. Thermo Fisher Scientific Model 48i Instruction Manual B-23...
  • Page 266 For more information on how to edit the scratch pad, see the “sp field” command. The following example copies the current list in scratch pad into the lrecs list. B-24 Model 48i Instruction Manual Thermo Fisher Scientific...
  • Page 267 “set copy sp to lrec”, “set copy sp to srec”, or “set copy sp to stream” commands. Send: set sp field 1 5 Receive: set sp field 1 5 ok Thermo Fisher Scientific Model 48i Instruction Manual B-25...

  • Page 268: Table B-6. Stream Time Values

    Attaches time stamp to streaming data string set cal co bkg Calibration set zero calibrate These commands will set the CO background. The following example shows a successful auto-calibration of the CO background. B-26 Model 48i Instruction Manual Thermo Fisher Scientific...
  • Page 269 If the mode is incorrect, the instrument responds with “can’t, wrong settings”. The following example reports that the CO coefficient is 1.200. Thermo Fisher Scientific Model 48i Instruction Manual B-27...
  • Page 270 Lo Multi-Point Calibration in dual and auto range mode. The following example reports the coefficient 0 having a value of 1.005. Send: coef 0 Receive: coef 0 1.005 ok B-28 Model 48i Instruction Manual Thermo Fisher Scientific...
  • Page 271 If the mode is incorrect, the instrument responds with “can’t, wrong settings”. The following example reports the span gas concentration in single range mode. Thermo Fisher Scientific Model 48i Instruction Manual B-29...
  • Page 272 This command sets the span cal reset to on or off. The following example sets the span cal reset to off. Send: set span cal reset off Receive: set span cal reset off ok B-30 Model 48i Instruction Manual Thermo Fisher Scientific...
  • Page 273 This command sets the zero cal reset on or off. The following example turns the zero cal reset off. Send: set zero cal reset off Receive: set zero cal reset off ok Thermo Fisher Scientific Model 48i Instruction Manual B-31...
  • Page 274 This command sets zero/span (zs) period to value, where value represents the zero/span period in hours. The following example sets the zero/span period to 24 hours. Send: set zs period 24 Receive: set zs period 24 ok B-32 Model 48i Instruction Manual Thermo Fisher Scientific...

  • Page 275: Keys/Display

    It is sent as a type '5' binary C-Link response with no checksum. The RLE encoding consists of a 0 followed by an 8-bit count of consecutive 0xFF bytes. The following 'c' code will expand the incoming data. Thermo Fisher Scientific Model 48i Instruction Manual B-33...
  • Page 276 These commands are meant for backward compatibility with the C series. Screen information is instead reported using the “iscreen” command above. Send: screen Receive: screen This is an ISeries instrument. Screen information not available. B-34 Model 48i Instruction Manual Thermo Fisher Scientific...

  • Page 277: Table B-7. Standard Ranges

    The following example sets the CO full-scale range to 50 ppm. Send: set range 5 Receive: set range 5 ok Table B–7. Standard Ranges mg/m Selection 1000 1000 2000 2000 5000 5000 10000 10000 Thermo Fisher Scientific Model 48i Instruction Manual B-35...
  • Page 278 This command sets the zero/span valves to the sample mode. The following example sets the instrument to sample mode, that is, the instrument is reading the sample gas. B-36 Model 48i Instruction Manual Thermo Fisher Scientific...
  • Page 279 = | on | off | These commands turn the pressure compensation on or off. The following example turns pressure compensation off. Send: set pres comp off Receive: set pres comp off ok Thermo Fisher Scientific Model 48i Instruction Manual B-37...

  • Page 280: Hardware Configuration

    This command sets the screen’s level of contrast, according to Table B–8. The following example sets the contrast level to 50%. Send: set contrast 10 Receive: set contrast 10 ok B-38 Model 48i Instruction Manual Thermo Fisher Scientific...

  • Page 281: Table B-8. Contrast Levels

    = month dd = day yy = year This command sets the date of the analyzer’s internal clock. The following example sets the date to December 1, 2009. Thermo Fisher Scientific Model 48i Instruction Manual B-39...

  • Page 282: Communications Configuration

    ▲ Send: set time 14:15 Receive: set time 14:15 ok addr dns Communications This command reports the TCP/IP address for the domain name server. Configuration Send: addr dns Receive: addr dns 192.168.1.1 B-40 Model 48i Instruction Manual Thermo Fisher Scientific...
  • Page 283 DHCP command that follows for additional information. ▲ Send: set addr ip 192.168.1.200 Receive: set addr ip 192.168.1.200 ok addr nm This command reports the IP netmask. Send: addr nm Receive: addr nm 255.255.255.0 Thermo Fisher Scientific Model 48i Instruction Manual B-41...
  • Page 284 9600. Note After the command is sent, the baud rate of the sending device must be changed to agree with the instrument. ▲ Send: set baud 9600 Receive: set baud 9600 ok B-42 Model 48i Instruction Manual Thermo Fisher Scientific...
  • Page 285 This command sets the reply termination format, where format is set according to Table B–9. The following example sets the reply termination format to checksum. Send: set format 01 Receive: set format 01 ok Thermo Fisher Scientific Model 48i Instruction Manual B-43...

  • Page 286: Table B-9. Reply Termination Formats

    Send: set host name analyzer01 Receive: set host name analyzer01 ok instr name This command reports the instrument name. The following example reports the instrument name for the Model 48i. Send: instr name Receive: instr name CO Analyzer CO Analyzer instrument id This command reports the instrument identification (ID).
  • Page 287 If the instrument is set to ignore the commands (value = 0), the instrument will respond with “ok” as if the command has been accepted and acted Thermo Fisher Scientific Model 48i Instruction Manual B-45...

  • Page 288: Table B-10. Allow Mode Command Values

    The following example sets the instrument to power up in remote/locked mode. Send: set power up mode 1 Receive: set power up mode 1 ok B-46 Model 48i Instruction Manual Thermo Fisher Scientific...

  • Page 289: Table B-11. Power Up Mode Values

    Send: program no Receive: program no iSeries 48i 01.02.12.095 set layout ack This command reports the stale layout/layout change indicator (*) that is attached to each response if the erec layout has changed since the last time erec layout was requested, according to Table B–12.

  • Page 290: Table B-13. Analog Current Output Range Values

    “calculated” value of channel 1 is 75.325 degrees F, volts are 2.796. This command responds with “feature not enabled” if the I/O expansion board is not detected. Send: analog vin 1 Receive: analog vin 1 75.325 2.796 B-48 Model 48i Instruction Manual Thermo Fisher Scientific...

  • Page 291: Table B-14. Analog Voltage Output Range Values

    This command reports the current state of the MODBUS registers (analog outputs). Output is in floating point format with the pair of registers start and start+1 appearing as the left-most value. Thermo Fisher Scientific Model 48i Instruction Manual B-49...
  • Page 292 The following example reports output 4 to be assigned an index number 11 corresponding to action of “general alarm”. Send: dout 4 Receive: dout 4 11 GEN ALARM open B-50 Model 48i Instruction Manual Thermo Fisher Scientific...

  • Page 293: Table B-15. Default Analog Output Channel Assignments

    Current Output Not Used Not Used Not Used Current Output Not Used Not Used Not Used Current Output Not Used Not Used Not Used Current Output Not Used Not Used Not Used Thermo Fisher Scientific Model 48i Instruction Manual B-51...
  • Page 294 “closed,” if all the relays are set to same state, that is all open or all closed. The following example shows that the status of all the relays’ logic is set to normally “open”. B-52 Model 48i Instruction Manual Thermo Fisher Scientific...

  • Page 295: Record Layout Definition

    (such as, 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). Thermo Fisher Scientific Model 48i Instruction Manual B-53...

  • Page 296: Format Specifier For Ascii Responses

    Format Specifier for The subsequent lines in the erec layout response describe the appearance of the full panel. The full instrument panel as it appears on the screen has two Erec Layout B-54 Model 48i Instruction Manual Thermo Fisher Scientific...

  • Page 297: Text

    1 and 2 must be 's', and no others may be 's'. Alarm Information The value source is followed by optional alarm information, indicated by a commercial at sign '@' with a source indicator and a starting bit indicator. Thermo Fisher Scientific Model 48i Instruction Manual B-55...

  • Page 298: Translation Table

    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. B-56 Model 48i Instruction Manual Thermo Fisher Scientific...

  • Page 299: Examples

    (0 -> local, 1 -> remote, etc.). The selection list shows that only the first two values, in this case, are to be shown to the user when the button is Thermo Fisher Scientific Model 48i Instruction Manual B-57...
  • Page 300 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-58 Model 48i Instruction Manual Thermo Fisher Scientific...

  • Page 301: Appendix C Modbus Protocol

    This is achieved by using the supported MODBUS parameters listed below. For details of the Model 48i MODBUS Protocol specification, see the following topics: “Serial Communication Parameters”...

  • Page 302: Function Codes

    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) Model 48i Instruction Manual Thermo Fisher Scientific...
  • Page 303 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 Fisher Scientific Model 48i Instruction Manual...
  • Page 304 Function Code 1 Byte 0x01 or 0x02 Exception Code 1 Byte 01=Illegal Function, 02=Illegal Address, 03=Illegal Data, 04=Slave Device Failure Here is an example of a request and response to read outputs 2–15: Model 48i Instruction Manual Thermo Fisher Scientific...
  • Page 305 For each register, the first byte contains the high order bits and the second contains the low order bits. Thermo Fisher Scientific Model 48i Instruction Manual...
  • Page 306 No. of Registers Lo 0x04 Response Field Name (Hex) Function 0x03 Byte Count 0x06 Register Value Hi (10) 0x02 Register Value Lo (10) 0x2B Register Value Hi (11) 0x00 Register Value Lo (11) 0x00 Model 48i Instruction Manual Thermo Fisher Scientific...

  • Page 307: X05) Force (Write) Single Coil

    0x0000 to maximum allowed by instrument Output Value 2 Bytes 0x0000 or 0xFF00 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 Thermo Fisher Scientific Model 48i Instruction Manual...

  • Page 308: Table C-1. Read Coils For 48I

    Data Unit (PDU) addresses. Verify the coil number on your MODBUS master to ensure that it matches the coil number on the instrument. ▲ Note Coil status 1 indicates active state. ▲ Table C–1. Read Coils for 48i Coil Number Status NONE AUTO RANGE...
  • Page 309 NOT USED NOT USED EXT ALARM 1 EXT ALARM 2 EXT ALARM 3 In addition to the coils listed in the Read Coils table, coils in the Write Coils table can also be read. Thermo Fisher Scientific Model 48i Instruction Manual...

  • Page 310: Table C-2. Read Registers For 48I

    ▲ Note For additional information on how to read registers and interpret the data, refer to the “(0x03/0x04) Read Holding Registers/Read Input Registers” section in this appendix. ▲ Table C–2. Read Registers for 48i Register Number Variable NONE 1&2 3&4 LO CO 5&6...
  • Page 311 Note The coils within each coil group in the following table are mutually exclusive and will not be triggered if there is conflict. Before you assert (1) one coil in a group, make sure the other coils in the group are de-asserted (0). ▲ Thermo Fisher Scientific Model 48i Instruction Manual C-11...

  • Page 312: Table C-3. Write Coils For 48I

    MODBUS Protocol MODBUS Parameters Supported Table C–3. Write Coils for 48i Coil Number Action NONE ZERO MODE SPAN MODE SET BACKGROUND CAL TO LOW SPAN AOUTS TO ZERO AOUTS TO FS CAL TO HIGH SPAN NOT USED NOT USED NOT USED...

  • Page 313: Serial Communication Parameters

    This is achieved by using the supported Gesytec commands listed below. For details of the Model 48i Gesytec Protocol specification, see the following topics: “Serial Communication Parameters”...

  • Page 314: Tcp Communication Parameters

    If a command is terminated with <ETX>, then two additional characters <BCC> is attached after <ETX>. This is the block checksum. Block Checksum Characters <BCC> may be added to the command to prevent processing invalid commands. Model 48i Instruction Manual Thermo Fisher Scientific...

  • Page 315: Block Checksum Characters

    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 Fisher Scientific Model 48i Instruction Manual...
  • Page 316 <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 48i Instruction Manual Thermo Fisher Scientific...
  • Page 317 For details on how to interpret the status bytes, refer to 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 Fisher Scientific Model 48i Instruction Manual...
  • Page 318 123. Data Query String: <STX>DA<CR> Reply String: <STX>MD03<SP>001<SP>+2578+01<SP>03 <SP>04<SP> 0000000 <SP>002 <SP>    Address First Concentration(E-format)=25.78 Address+1 +5681+00<SP>03<SP>04<SP> 0000000<SP>003<SP>+1175+01<SP>03<SP>04<SP    Second Concentration = 5.681 Address+2 Third Concentration=11.75 0000000<SP><CR> Model 48i Instruction Manual Thermo Fisher Scientific...

  • Page 319: Table D-1. Operating Status For Model 48I

    Operating and Error Table D–1 for operating status and Table D–2 for error status for the Model 48i. Status Table D–1. Operating Status for Model 48i  Bit  Hex-value Operating status: Service Mode (On) Maintenance (Local) Zero Gas (On)

  • Page 320: Table D-2. Error Status For Model 48I

    Gesytec (Bayern-Hessen) Protocol Gesytec Commands Table D–2. Error Status for Model 48i  Bit  Hex-value Error status: Internal Temperature Alarm Optical Chamber Temperature Alarm AGC Intensity Alarm Bias Voltage Alarm Pressure Alarm Sample Flow Alarm Motor Speed Alarm Not Used...