Thermo Fisher Scientific 42i User Manual
Model 42i
Instruction Manual
Chemiluminescence NO-NO2-NOx Analyzer
Part Number 101350-00
28Dec2007
© 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
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. Further information on
Thermo Fisher Scientific’s compliance with these Directives, the recyclers
in your country, and information on Thermo Fisher Scientific products
which may assist the detection of substances subject to the RoHS Directive
are available at: www.thermo.com/WEEERoHS.
Thermo Fisher Scientific WEEE Compliance
Reference Method Designation
The Thermo Scientific Model 42i is designated by the United States
Environmental Protection Agency (US EPA) as a Reference Method for the
measurement of ambient concentrations of nitrogen dioxide pursuant with
the requirements defined in the Code of Federal Regulations, Title 40, Part
53.
Designated Reference Method Number: RFNA-1289-074
EPA Designation Date: December 11, 1989 (amended for Model 42i)
The Model 42i Chemiluminescence NO-NO2-NOx Analyzer meets EPA
reference designation requirements when operated with the following:
Range 50 to 1000 ppb
Averaging Time 10 to 300 seconds
Temperature Range 15 to 35 °C
Line Voltage 90 to 110 Vac @50/60 Hertz
105 to 125 Vac @50/60 Hertz
210 to 250 Vac @50/60 Hertz
Pressure Compensation ON or OFF
Temperature Compensation ON or OFF
Flow Rate 0.5 to 1 LPM
RS-232/RS-485 Interface
With or without the following options:
Teflon Particulate Filter
Ozone Particulate Filter
Internal Zero/Span and Sample Valves
Ozone Permeation Dryer
Permeation Oven
Rack Mounts
I/O Expansion Board
Thermo Fisher Scientific Reference Method Designation
About This Manual
This manual provides information about operating, maintaining, and
servicing the analyzer. It also contains important alerts to ensure safe
operation and prevent equipment damage. The manual is organized into
the following chapters and appendixes to provide direct access to specific
operation and service information.
● Chapter 1 “Introduction” provides an overview of product features,
describes the principles of operation, and lists the specifications.
● Chapter 2 “Installation” describes how to unpack, setup, and startup
the analyzer.
● Chapter 3 “Operation” describes the front panel display, the front
panel pushbuttons, and the menu-driven software.
● Chapter 4 “Calibration” provides the procedures for calibrating the
analyzer and describes the required equipment.
● Chapter 5 “Preventive Maintenance” provides maintenance procedures
to ensure reliable and consistent instrument operation.
● Chapter 6 “Troubleshooting” presents guidelines for diagnosing
analyzer failures, isolating faults, and includes recommended actions for
restoring proper operation.
● Chapter 7 “Servicing” presents safety alerts for technicians working on
the analyzer, step-by-step instructions for repairing and replacing
components, and a replacement parts list. It also includes contact
information for product support and technical information.
● Chapter 8 “System Description” describes the function and location of
the system components, provides an overview of the software structure,
and includes a description of the system electronics and input/output
connections.
● Chapter 9 “Optional Equipment” describes the optional equipment
that can be used with this analyzer.
● Appendix A “Warranty” is a copy of the warranty statement.
● Appendix B “C-Link Protocol Commands” provides a description of
the C-Link protocol commands that can be used to remotely control an
analyzer using a host device such as a PC or datalogger.
Thermo Fisher Scientific Model 42i Instruction Manual i
About This Manual
Safety
● Appendix C “MODBUS Protocol” provides a description of the
MODBUS Protocol Interface and is supported both over RS-232/485
(RTU protocol) as well as TCP/IP over Ethernet.
● Appendix D “Geysitech (Bayern-Hessen) Protocol” provides a
description of the Geysitech (Bayern-Hessen or BH) Protocol Interface
and is supported both over RS-232/485 as well as TCP/IP over
Ethernet.
Safety
Safety and Equipment
Damage Alerts
Review the following safety information carefully before using the analyzer.
This manual provides specific information on how to operate the analyzer,
however, if the calibrator is used in a manner not specified by the
manufacturer, the protection provided by the equipment may be impaired.
This manual contains important information to alert you to potential safety
hazards and risks of equipment damage. Refer to the following types of
alerts you may see in this manual.
Safety and Equipment Damage Alert Descriptions
Alert Description
DANGER A hazard is present that will result in death or serious
WARNING A hazard is present or an unsafe practice can result in
CAUTION The hazard or unsafe practice could result in minor to
personal injury if the warning is ignored.
serious personal injury if the warning is ignored.
moderate personal injury if the warning is ignored.
▲
▲
▲
Equipment Damage The hazard or unsafe practice could result in property
damage if the warning is ignored.
▲
ii Model 42i Instruction Manual Thermo Fisher Scientific
Safety and Equipment Damage Alerts
Safety and Equipment damage Alerts in this Manual
Alert Description
About This Manual
WARNING If the equipment is operated in a manner not specified by
the manufacturer, the protection provided by the
equipment may be impaired.
▲
The service procedures in this manual are restricted to
qualified service personnel only.
▲
The Model 42i is supplied with a three-wire grounding
cord. Under no circumstances should this grounding
system be defeated.
CAUTION If the LCD panel breaks, do not to let the liquid crystal
contact your skin or clothes. If the liquid crystal contacts
▲
your skin or clothes, wash it off immediately using soap
and water.
Equipment Damage Do not attempt to lift the analyzer by the cover or other
external fittings.
Some internal components can be damaged by small
▲
▲
amounts of static electricity. A properly grounded
antistatic wrist strap must be worn while handling any
internal component.
This adjustment should only be performed by an
instrument service technician.
Handle all printed circuit boards by the edges only.
Do not remove the panel or frame from the LCD module.
▲
▲
▲
▲
The LCD module polarizing plate is very fragile, handle it
carefully.
▲
Do not wipe the LCD module polarizing plate with a dry
cloth, it may easily scratch the plate.
▲
Do not use Ketonics solvent or aromatic solvent to clean
the LCD module, use a soft cloth moistened with a
naphtha cleaning solvent.
Do not place the LCD module near organic solvents or
corrosive gases.
▲
Do not shake or jolt the LCD module.
▲
▲
Thermo Fisher Scientific Model 42i Instruction Manual iii
About This Manual
W
W
FCC Compliance
FCC Compliance
EEE Symbol
Changes or modifications to this unit not expressly approved by the party
responsible for compliance could void the user’s authority to operate the
equipment.
Note This equipment has been tested and found to comply with the limits
for a Class A digital device, pursuant to Part 15 of the FCC Rules. These
limits are designed to provide reasonable protection against harmful
interference when the equipment is operated in a commercial environment.
This equipment generates, uses, and can radiate radio frequency energy
and, if not installed and used in accordance with the instruction manual,
may cause harmful interference to radio communications. Operation of this
equipment in a residential area is likely to cause harmful interference in
which case the user will be required to correct the interference at his own
expense. ▲
The following symbol and description identify the WEEE marking used on
the instrument and in the associated documentation.
Symbol Description
here to Get Help
Marking of electrical and electronic equipment which applies to electrical and
electronic equipment falling under the Directive 2002/96/EC (WEEE) and the
equipment that has been put on the market after 13 August 2005.
▲
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
iv Model 42i Instruction Manual Thermo Fisher Scientific
Contents
Chapter 1
Chapter 2
Chapter 3
Introduction........................................................................................................ 1-1
Principle of Operation ........................................................................ 1-2
Specifications ...................................................................................... 1-3
Installation .........................................................................................................2-1
Lifting................................................................................................. 2-1
Unpacking and Inspection .................................................................. 2-1
Setup Procedure .................................................................................. 2-3
Connecting External Devices .............................................................. 2-5
Terminal Board PCB Assemblies...................................................... 2-5
I/O Terminal Board...................................................................... 2-5
D/O Terminal Board .................................................................... 2-7
25-Pin Terminal Board ................................................................. 2-8
Startup ................................................................................................ 2-9
Operation ............................................................................................................ 3-1
Display................................................................................................ 3-1
Pushbuttons ........................................................................................ 3-2
Soft Keys.......................................................................................... 3-3
Software Overview .............................................................................. 3-4
Power-Up Screen ............................................................................. 3-6
Run Screen....................................................................................... 3-6
Main Menu...................................................................................... 3-7
Range Menu ....................................................................................... 3-8
Single Range Mode .......................................................................... 3-8
Dual Range Mode............................................................................ 3-9
Auto Range Mode.......................................................................... 3-11
Gas Units....................................................................................... 3-13
NO, NO2, and NO
Ranges........................................................... 3-13
x
Set Custom Ranges ........................................................................ 3-15
Custom Ranges ........................................................................... 3-16
Averaging Time................................................................................. 3-16
Calibration Factors Menu .................................................................3-17
NO and NO
NO, NO2, and NO
Backgrounds............................................................ 3-18
x
Coefficients ................................................... 3-19
x
Calibration Pressure ....................................................................... 3-20
Reset User Calibration Default....................................................... 3-20
Calibration Menu ............................................................................. 3-21
Calibrate NO and NO
Backgrounds............................................. 3-22
x
Thermo Fisher Scientific Model 42i Instruction Manual v
Contents
Calibrate NO, NO2, and NO
Coefficients.................................... 3-22
x
Calibrate Pressure........................................................................... 3-23
Zero/Span Check ........................................................................... 3-23
Next Time .................................................................................. 3-24
Period Hours............................................................................... 3-24
Zero/Span/Purge Duration Minutes ........................................... 3-25
Zero/Span Averaging Time ......................................................... 3-25
Zero/Span Ratio.......................................................................... 3-26
Instrument Controls Menu ............................................................... 3-26
Ozonator........................................................................................ 3-26
PMT Supply .................................................................................. 3-27
Auto/Manual Mode ....................................................................... 3-27
Datalogging Settings ...................................................................... 3-28
Select SREC/LREC..................................................................... 3-28
View Logged Data....................................................................... 3-29
Number of Records..................................................................... 3-29
Date and Time............................................................................ 3-30
Erase Log .................................................................................... 3-30
Select Content............................................................................. 3-31
Choose Item Type....................................................................... 3-31
Concentrations............................................................................ 3-32
Other Measurements................................................................... 3-32
Analog Inputs.............................................................................. 3-33
Commit Content ........................................................................ 3-33
Reset to Default Content ............................................................ 3-34
Configure Datalogging................................................................ 3-34
Logging Period Min.................................................................... 3-35
Memory Allocation Percent......................................................... 3-35
Data Treatment .......................................................................... 3-35
Communication Settings................................................................ 3-36
Baud Rate ................................................................................... 3-36
Instrument ID............................................................................. 3-37
Communication Protocol............................................................ 3-37
Streaming Data Configuration .................................................... 3-37
Streaming Data Interval .............................................................. 3-38
Choose Item Signal ..................................................................... 3-39
Concentrations............................................................................ 3-39
Other Measurements................................................................... 3-39
Analog Inputs.............................................................................. 3-40
RS-232/RS-485 Selection............................................................ 3-40
TCP/IP Settings.......................................................................... 3-41
Use DHCP ................................................................................. 3-41
IP Address................................................................................... 3-42
Netmask...................................................................................... 3-42
Default Gateway ......................................................................... 3-43
Host Name ................................................................................. 3-43
vi Model 42i Instruction Manual Thermo Fisher Scientific
Contents
I/O Configuration.......................................................................... 3-43
Output Relay Settings ................................................................. 3-44
Logic State .................................................................................. 3-44
Instrument State ......................................................................... 3-44
Alarms......................................................................................... 3-45
Non-Alarm ................................................................................. 3-46
Digital Input Settings.................................................................. 3-46
Logic State .................................................................................. 3-46
Instrument Action....................................................................... 3-47
Analog Output Configuration..................................................... 3-47
Select Output Range ................................................................... 3-48
Minimum and Maximum Value ................................................. 3-48
Choose Signal to Output ............................................................ 3-50
Analog Input Configuration........................................................ 3-51
Descriptor ................................................................................... 3-52
Units........................................................................................... 3-52
Decimal Places ............................................................................ 3-53
Number of Table Points.............................................................. 3-53
Table Point ................................................................................. 3-53
Volts ........................................................................................... 3-54
User Value .................................................................................. 3-54
Temperature Compensation........................................................... 3-55
Pressure Compensation .................................................................. 3-55
Screen Contrast.............................................................................. 3-56
Service Mode ................................................................................. 3-56
Date/Time ..................................................................................... 3-57
Diagnostics Menu ............................................................................. 3-57
Program Version ............................................................................ 3-58
Voltages ......................................................................................... 3-58
Motherboard Voltages................................................................. 3-58
Interface Board Voltages ............................................................. 3-59
I/O Board Voltages ..................................................................... 3-59
Temperatures ................................................................................. 3-59
Pressure.......................................................................................... 3-60
Flow............................................................................................... 3-60
Analog Input Readings................................................................... 3-61
Analog Input Voltages.................................................................... 3-61
Digital Inputs................................................................................. 3-61
Relay States .................................................................................... 3-62
Test Analog Outputs...................................................................... 3-62
Set Analog Outputs..................................................................... 3-62
Instrument Configuration.............................................................. 3-63
Contact Information ...................................................................... 3-63
Alarms Menu .................................................................................... 3-64
Internal Temperature ..................................................................... 3-64
Min and Max Internal Temperature Limits................................. 3-65
Thermo Fisher Scientific Model 42i Instruction Manual vii
Contents
Chamber Temperature................................................................... 3-65
Min and Max Chamber Temperature Limits .............................. 3-66
Cooler Temperature....................................................................... 3-66
Min and Max Cooler Temperature Limits .................................. 3-67
Converter Temperature.................................................................. 3-67
Min and Max Converter Temperature Limits ............................. 3-67
Permeation Oven Gas Temperature ............................................... 3-68
Min and Max Permeation Oven Temperature Limits.................. 3-68
Pressure.......................................................................................... 3-69
Min and Max Pressure Limits ..................................................... 3-69
Flow............................................................................................... 3-69
Min and Max Flow Limits .......................................................... 3-70
Ozonator Flow............................................................................... 3-70
Zero and Span Check..................................................................... 3-71
Max Zero and Span Offset .......................................................... 3-71
Zero and Span Auto Calibration ....................................................3-71
NO, NO2, and NO
Min and Max NO, NO2, and NO
Concentration ............................................... 3-72
x
Concentration Limits........... 3-72
x
Min Trigger ................................................................................ 3-73
Service Menu .................................................................................... 3-73
PMT Voltage Adjustment .............................................................. 3-74
Range Mode Select......................................................................... 3-74
Converter Set Temperature ............................................................ 3-75
Pressure Calibration ....................................................................... 3-75
Calibrate Pressure Zero ............................................................... 3-76
Calibrate Pressure Span............................................................... 3-76
Restore Default Pressure Calibration........................................... 3-77
Flow Calibration ............................................................................ 3-77
Calibrate Flow Zero .................................................................... 3-78
Calibrate Flow Span.................................................................... 3-78
Restore Default Flow Calibration................................................ 3-79
Input Board Calibration................................................................. 3-79
Manual Input Calibration ........................................................... 3-79
Automatic Input Calibration....................................................... 3-80
Input Frequency Display............................................................. 3-81
Temperature Calibration................................................................ 3-81
Analog Output Calibration ............................................................ 3-82
Analog Output Calibrate Zero .................................................... 3-83
Analog Output Calibrate Full-Scale ............................................ 3-83
Analog Input Calibration ............................................................... 3-83
Analog Input Calibrate Zero ....................................................... 3-84
Analog Input Calibrate Full-Scale ............................................... 3-84
Permeation Oven Settings.............................................................. 3-85
Calibrate Gas Thermistor............................................................ 3-85
Water Bath.................................................................................. 3-86
Resistor ....................................................................................... 3-86
viii Model 42i Instruction Manual Thermo Fisher Scientific
Contents
Calibrate Oven Thermistor ......................................................... 3-86
Permeation Oven Selection ......................................................... 3-87
Factory Calibrate Gas Thermistor ............................................... 3-87
Low and High Points .................................................................. 3-87
Set Defaults................................................................................. 3-88
Factory Calibrate Oven Thermistor............................................. 3-88
Low and High Points .................................................................. 3-89
Set Defaults................................................................................. 3-89
Ozonator Safety ............................................................................. 3-89
Dilution Ratio................................................................................ 3-90
Display Pixel Test .......................................................................... 3-90
Restore User Defaults..................................................................... 3-91
Password Menu................................................................................. 3-91
Set Password .................................................................................. 3-92
Lock Instrument ............................................................................... 3-92
Change Password .............................................................................. 3-92
Remove Password.............................................................................. 3-93
Unlock Instrument............................................................................ 3-93
Chapter 4
Calibration.......................................................................................................... 4-1
Equipment Required........................................................................... 4-1
Zero Gas Generator.......................................................................... 4-2
Compression ................................................................................. 4-2
Drying .......................................................................................... 4-2
Oxidation...................................................................................... 4-2
Scrubbing...................................................................................... 4-2
Gas Phase Titrator............................................................................ 4-3
Flow Controllers ...........................................................................4-3
Pressure Regulator......................................................................... 4-3
Ozone Generator .......................................................................... 4-4
Diverter Valve............................................................................... 4-4
Reaction Chamber ........................................................................ 4-4
Mixing Chamber........................................................................... 4-4
Output Manifold .......................................................................... 4-4
Reagents........................................................................................... 4-4
NO Concentration Standard......................................................... 4-4
Assaying a Working NO Standard Against a NIST-traceable NO
Standard........................................................................................ 4-5
Zero Air ........................................................................................ 4-6
Dynamic Parameter Specifications for Gas Titrator.......................... 4-6
Determining GPT System Flow Conditions ................................. 4-6
Pre-Calibration ................................................................................... 4-8
Calibration.......................................................................................... 4-9
Connect GPT Apparatus to the Analyzer ....................................... 4-10
Adjust Instrument Gain .................................................................4-10
Set NO and NO
Background to Zero........................................ 4-10
x
Thermo Fisher Scientific Model 42i Instruction Manual ix
Contents
Calibrate the NO Channel to the NO Calibration Gas............... 4-12
Calibrate the NOx Channel to the NO
Preparing NO, NOx, and NO
Calibration Curves ..................... 4-13
2
Alternative Calibration Procedure Using NO
Calibration Gas............. 4-12
x
Permeation Tube.... 4-16
2
Calibration in Dual Range and Auto Range Mode............................ 4-16
Set NO and NO
Background Readings to Zero............................ 4-16
x
Calibrate Low NO ......................................................................... 4-17
Calibrate Low NO
Calibrate Low NO
........................................................................ 4-18
x
........................................................................ 4-18
2
Calibrate High NO........................................................................ 4-19
Calibrate High NO
Calibrate High NO
....................................................................... 4-19
x
....................................................................... 4-20
2
Zero and Span Check........................................................................ 4-21
Chapter 5
Chapter 6
Chapter 7
Preventive Maintenance .................................................................................5-1
Safety Precautions ............................................................................... 5-1
Replacement Parts............................................................................... 5-2
Cleaning the Outside Case.................................................................. 5-2
Ozonator Air Feed Drying Column Replacement ............................... 5-2
Capillaries Inspection and Replacement .............................................. 5-2
Thermoelectric Cooler Fins Inspection and Cleaning.......................... 5-4
Fan Filters Inspection and Cleaning .................................................... 5-4
Pump Rebuilding................................................................................ 5-5
Troubleshooting.................................................................................................6-1
Safety Precautions ............................................................................... 6-1
Troubleshooting Guides...................................................................... 6-1
Board-Level Connection Diagrams ..................................................... 6-6
Connector Pin Descriptions................................................................ 6-8
Service Locations............................................................................... 6-21
Servicing.............................................................................................................7-1
Safety Precautions ............................................................................... 7-2
Firmware Updates............................................................................... 7-4
Accessing the Service Mode................................................................. 7-4
Replacement Parts List ........................................................................ 7-4
Cable List............................................................................................ 7-6
External Device Connection Components .......................................... 7-6
Removing the Measurement Bench and Lowering the Partition Panel 7-8
Pump Replacement ............................................................................. 7-9
Fan Replacement............................................................................... 7-10
PMT Cooler and Reaction Chamber Assembly Replacement............ 7-11
Photomultiplier Tube Replacement .................................................. 7-13
PMT High Voltage Power Supply Replacement................................ 7-14
PMT Voltage Adjustment ................................................................. 7-16
x Model 42i Instruction Manual Thermo Fisher Scientific
Contents
Reaction Chamber Cleaning or Removal .......................................... 7-17
NO
-to-NO Converter Replacement ................................................ 7-18
2
Solenoid Valve Replacement ............................................................. 7-20
Ozonator Assembly Replacement ...................................................... 7-21
Ozonator Transformer Replacement ................................................. 7-23
Input Board Replacement ................................................................. 7-23
Input Board Calibration.................................................................... 7-25
DC Power Supply Replacement ........................................................ 7-25
Analog Output Testing ..................................................................... 7-26
Analog Output Calibration ............................................................... 7-29
Analog Input Calibration .................................................................. 7-30
Calibrating the Input Channels to Zero Volts ................................ 7-30
Calibrating the Input Channels to Full-Scale ................................. 7-30
Pressure Transducer Assembly Replacement...................................... 7-31
Pressure Transducer Calibration........................................................ 7-32
Temperature Control Board Replacement......................................... 7-34
Ambient Temperature Calibration .................................................... 7-35
Fuse Replacement ............................................................................. 7-36
Scrubber Replacement....................................................................... 7-36
I/O Expansion Board (Optional) Replacement ................................. 7-37
Digital Output Board Replacement................................................... 7-39
Motherboard Replacement................................................................ 7-39
Measurement Interface Board Replacement ...................................... 7-40
Flow Transducer Replacement .......................................................... 7-41
Flow Transducer Calibration............................................................. 7-42
Front Panel Board Replacement........................................................ 7-44
LCD Module Replacement ............................................................... 7-45
Service Locations............................................................................... 7-46
Chapter 8
System Description ..........................................................................................8-1
Hardware ............................................................................................ 8-1
-to-NO Converter ....................................................................... 8-2
NO
2
Mode Solenoid................................................................................. 8-2
Reaction Chamber .............................................................................. 8-2
Optical Filter.................................................................................... 8-3
Pressure Transducer ......................................................................... 8-3
Sample Flow Sensor ......................................................................... 8-3
Ozonator............................................................................................. 8-3
Ozonator Flow Switch ..................................................................... 8-3
Photomultiplier Tube ......................................................................... 8-3
Photomultiplier Tube Cooler.............................................................. 8-3
Pump .................................................................................................. 8-3
Sample Capillary .............................................................................. 8-3
Dry Air Capillary ............................................................................. 8-4
Software .............................................................................................. 8-4
Instrument Control.......................................................................... 8-4
Thermo Fisher Scientific Model 42i Instruction Manual xi
Contents
Monitoring Signals........................................................................... 8-4
Measurement Calculations ............................................................... 8-5
Output Communication .................................................................. 8-5
Electronics .......................................................................................... 8-6
Motherboard.................................................................................... 8-6
External Connectors...................................................................... 8-6
Internal Connectors ...................................................................... 8-6
Measurement Interface Board .......................................................... 8-7
Measurement Interface Board Connectors..................................... 8-7
Flow Sensor Assembly ...................................................................... 8-7
Pressure Sensor Assembly ................................................................. 8-7
Temperature Control Board............................................................. 8-7
PMT Power Supply Assembly.......................................................... 8-8
Input Board Assembly...................................................................... 8-8
Digital Output Board....................................................................... 8-8
I/O Expansion Board (Optional) ..................................................... 8-8
Front Panel Connector Board .......................................................... 8-9
I/O Components................................................................................. 8-9
Analog Voltage Outputs................................................................... 8-9
Analog Current Outputs (Optional) .............................................. 8-10
Analog Voltage Inputs (Optional) .................................................. 8-10
Digital Relay Outputs .................................................................... 8-10
Digital Inputs................................................................................. 8-10
Serial Ports ..................................................................................... 8-11
RS-232 Connection ....................................................................... 8-11
RS-485 Connection ....................................................................... 8-12
Ethernet Connection...................................................................... 8-12
External Accessory Connector ........................................................ 8-12
Chapter 9
Optional Equipment...........................................................................................9-1
Internal Zero/Span and Sample Valves................................................ 9-1
Internal Permeation Span Source ........................................................ 9-2
Permeation Tube Installation ........................................................... 9-3
Computation of Concentrations ...................................................... 9-4
Oven Installation and Configuration................................................ 9-4
Permeation Tube Oven Calibration ................................................. 9-6
Setting Perm Oven Temperature................................................... 9-6
Setting Temperature with Water Bath........................................... 9-7
Setting Temperature with Known Resistance ................................ 9-8
Determining Permeation Rate by Weight Loss................................. 9-9
Determining Release Rate by Transfer Standard............................... 9-9
Ozonator Permeation Dryer.............................................................. 9-10
Sample Permeation Dryer ................................................................. 9-10
Lag Volume ...................................................................................... 9-10
Principle of Operation ................................................................... 9-10
Lag Volume Test............................................................................ 9-12
xii Model 42i Instruction Manual Thermo Fisher Scientific
Contents
Ammonia Scrubber ........................................................................... 9-12
Teflon Particulate Filter .................................................................... 9-12
Ozone Particulate Filter .................................................................... 9-13
NO
-to-NO Converter ..................................................................... 9-13
2
I/O Expansion Board Assembly......................................................... 9-13
Terminal Block and Cable Kits ......................................................... 9-13
Cables ............................................................................................... 9-13
Mounting Options............................................................................ 9-15
Appendix A
Appendix B
Warranty ............................................................................................................ A-1
C-Link Protocol Commands............................................................................ B-1
Instrument Identification Number......................................................B-1
Commands .........................................................................................B-2
Commands List................................................................................B-2
Measurements .....................................................................................B-9
Alarms...............................................................................................B-13
Diagnostics .......................................................................................B-17
Datalogging.......................................................................................B-17
Calibration........................................................................................B-25
Keys/Display .....................................................................................B-29
Measurement Configuration .............................................................B-31
Hardware Configuration ...................................................................B-35
Communications Configuration .......................................................B-39
I/O Configuration.............................................................................B-42
Record Layout Definition .................................................................B-47
Format Specifier for ASCII Responses............................................B-48
Format Specifier for Binary Responses ...........................................B-48
Format Specifier for EREC Layout.................................................B-49
Text ............................................................................................B-49
Value String ................................................................................B-49
Value Source ...............................................................................B-49
Alarm Information......................................................................B-50
Translation Table........................................................................B-50
Selection Table............................................................................B-50
Button Designator.......................................................................B-50
Examples.....................................................................................B-51
Appendix C
MODBUS Protocol ............................................................................................C-1
Serial Communication Parameters ..................................................... C-1
TCP Communication Parameters ...................................................... C-2
Application Data Unit Definition ...................................................... C-2
Slave Address................................................................................... C-2
MBAP Header ................................................................................ C-2
Function Code................................................................................ C-3
Thermo Fisher Scientific Model 42i Instruction Manual xiii
Contents
Data................................................................................................ C-3
Error Check .................................................................................... C-3
Function Codes.................................................................................. C-3
(0x01/0x02) Read Coils / Read Inputs ............................................ C-3
(0x03/0x04) Read Holding Registers / Read Input Registers........... C-5
(0x05) Force (Write) Single Coil..................................................... C-7
MODBUS Parameters Supported ...................................................... C-8
Appendix D
Geysitech (Bayern-Hessen) Protocol...........................................................D-1
Serial Communication Parameters .....................................................D-1
TCP Communication Parameters ...................................................... D-2
Instrument Address ............................................................................ D-2
Abbreviations Used ............................................................................ D-2
Basic Command Structure ................................................................. D-2
Block Checksum <BCC> ................................................................... D-3
Geysitech Commands ........................................................................D-3
Instrument Control Command (ST)............................................... D-3
Data Sampling/Data Query Command (DA).................................. D-4
Measurements reported in response to DA command .....................D-6
Single Range Mode ...................................................................... D-6
Dual/Auto Range Mode............................................................... D-6
Operating and Error Status ............................................................. D-6
xiv Model 42i Instruction Manual Thermo Fisher Scientific
Figures
Figure 1–1. Model 42i Flow Schematic ............................................................. 1-3
Figure 2–1. Remove the Packing Material ......................................................... 2-2
Figure 2–2. Remove the Shipping Screws ......................................................... 2-2
Figure 2–3. Model 42i Rear Panel...................................................................... 2-3
Figure 2–4. Atmospheric Dump Bypass Plumbing ............................................. 2-4
Figure 2–5. I/O Terminal Board Views ............................................................... 2-6
Figure 2–6. D/O Terminal Board Views.............................................................. 2-7
Figure 2–7. 25-Pin Terminal Board Views.......................................................... 2-8
Figure 3–1. Front Panel Display.......................................................................... 3-2
Figure 3–2. Front Panel Pushbuttons.................................................................. 3-2
Figure 3–3. Flowchart of Menu-Driven Software .............................................. 3-5
Figure 3–4. Pin-Out of Rear Panel Connector in Single Range Mode ............... 3-9
Figure 3–5. Pin-Out of Rear Panel Connector in Dual Range Mode................ 3-10
Figure 3–6. Analog Output in Auto Range Mode............................................. 3-11
Figure 3–7. Pin-Out of Rear Connector in Auto Range Mode.......................... 3-12
Figure 4–1. GPT System...................................................................................... 4-3
Figure 5–1. Inspecting and Replacing the Capillaries ....................................... 5-3
Figure 5–2. Inspecting and Cleaning the Fan Filters.......................................... 5-5
Figure 5–3. Rebuilding the Pump........................................................................ 5-7
Figure 6–1. Board-Level Connection Diagram - Common Electronics............... 6-6
Figure 6–2. Board-Level Connection Diagram - Measurement System ............ 6-7
Figure 7–1. Properly Grounded Antistatic Wrist Strap ...................................... 7-4
Figure 7–2. Component Layout........................................................................... 7-7
Figure 7–3. Removing the Measurement Bench and Lowering the Partition
Panel ..................................................................................................................... 7-8
Figure 7–4. Replacing the Pump....................................................................... 7-10
Figure 7–5. Replacing the Fan .......................................................................... 7-11
Figure 7–6. PMT Cooler and Reaction Chamber.............................................. 7-12
Figure 7–7. Replacing the PMT ........................................................................ 7-14
Figure 7–8. Replacing the PMT HVPS .............................................................. 7-15
Figure 7–9. Cleaning or Removing the Reaction Chamber .............................. 7-18
Figure 7–10. NO
Figure 7–11. Replacing the Solenoid Valve ..................................................... 7-21
Figure 7–12. Replacing the Ozonator Assembly .............................................. 7-22
Figure 7–13. Replacing the Input Board........................................................... 7-24
-to-NO Molybdenum Converter Assembly ........................... 7-19
2
Thermo Fisher Scientific Model 42i Instruction Manual xv
Figures
Figure 7–14. Replacing the DC Power Supply.................................................. 7-26
Figure 7–15. Rear Panel Analog Input and Output Pins ...................................7-27
Figure 7–16. Replacing the Pressure Transducer............................................. 7-32
Figure 7–17. Replacing the Scrubber................................................................7-37
Figure 7–18. Replacing the I/O Expansion Board (Optional)............................7-38
Figure 7–19. Rear Panel Board Connectors...................................................... 7-38
Figure 7–20. Replacing the Measurement Interface Board............................. 7-41
Figure 7–21. Replacing the Flow Transducer ................................................... 7-42
Figure 7–22. Replacing the Front Panel Board and the LCD Module............... 7-45
Figure 8–1. Hardware Components ....................................................................8-2
Figure 9–1. Flow Diagram, Zero/Span Option.................................................... 9-2
Figure 9–2. Flow Diagram, Internal Permeation with Zero/Span Valve ............9-3
Figure 9–3. Flow Diagram, Lag Volume............................................................9-12
Figure 9–4. Rack Mount Option Assembly ....................................................... 9-15
Figure 9–5. Bench Mounting............................................................................. 9-16
Figure 9–6. EIA Rack Mounting ........................................................................9-17
Figure 9–7. Retrofit Rack Mounting..................................................................9-18
Figure B–1. Flags ..............................................................................................B-13
xvi Model 42i Instruction Manual Thermo Fisher Scientific
Tables
Table 1–1. Model 42i Specifications ................................................................. 1-3
Table 1–2. Model 42i Optional Permeation Oven 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. Front Panel Pushbuttons................................................................... 3-3
Table 3–2. Default Analog Outputs in Single Range Mode............................... 3-9
Table 3–3. Default Analog Outputs in Dual Range Mode ............................... 3-10
Table 3–4. Default Analog Outputs in Auto Range Mode ............................... 3-12
Table 3–5. Standard Ranges............................................................................. 3-14
Table 3–6. Extended Ranges ............................................................................ 3-15
Table 3–7. Analog Output Zero to Full-Scale Table......................................... 3-49
Table 3–8. Signal Type Group Choices............................................................. 3-51
Table 4–1. Scrubbing Materials ......................................................................... 4-2
Table 6–1. Troubleshooting - General Guide ..................................................... 6-2
Table 6–2. Troubleshooting - Alarm Messages ................................................. 6-4
Table 6–3. Motherboard Connector Pin Descriptions........................................ 6-8
Table 6–4. Measurement Interface Board Connector Pin Descriptions .......... 6-13
Table 6–5. Front Panel Board Connector Pin Diagram..................................... 6-15
Table 6–6. I/O Expansion Board (Optional) Connector Pin Descriptions ......... 6-17
Table 6–7. Digital Output Board Connector Pin Descriptions.......................... 6-18
Table 6–8. Input Board Connector Pin Descriptions ........................................ 6-20
Table 6–9. Temperature Control Board Connector Pin Descriptions............... 6-20
Table 7–1. Model 42i Replacement Parts.......................................................... 7-4
Table 7–2. Model 42i Cables.............................................................................. 7-6
Table 7–3. External Device Connection Components ........................................ 7-6
Table 7–4. Analog Output Channels and Rear Panel Pin Connections............ 7-28
Table 7–5. Analog Input Channels and Rear Panel Pin Connections............... 7-28
Table 8–1. RS-232 DB Connector Pin Configurations ...................................... 8-12
Table 8–2. RS-485 DB Connector Pin Configuration........................................ 8-12
Table 9–1. Cable Options.................................................................................. 9-14
Table 9–2. Color Codes for 25-Pin and 37-Pin Cables ..................................... 9-14
Table 9–3. Mounting Options ........................................................................... 9-15
Table B–1. C-Link Protocol Commands .............................................................. B-2
Table B–2. Averaging Times ............................................................................B-10
Thermo Fisher Scientific Model 42i Instruction Manual xvii
Tables
Table B–3. Alarm Trigger Values......................................................................B-17
Table B–4. Record Output Formats...................................................................B-22
Table B–5. Stream Time Values .......................................................................B-25
Table B–6. Standard Ranges ............................................................................B-32
Table B–7. Extended Ranges............................................................................B-32
Table B–8. Contrast Levels...............................................................................B-36
Table B–9. Reply Termination Formats ............................................................B-41
Table B–10. Analog Current Output Range Values..........................................B-43
Table B–11. Analog Voltage Output Range Values .........................................B-44
Table B–12. Default Output Assignment..........................................................B-45
Table C–1. Read Coils for 42i.............................................................................C-8
Table C–2. Read Registers for 42i......................................................................C-9
Table C–3. Write Coils for 42i..........................................................................C-11
Table D–1. Operating Status for Model 42i...................................................... D-7
Table D–2. Error Status for Model 42i .............................................................. D-7
xviii Model 42i Instruction Manual Thermo Fisher Scientific
Chapter 1
Introduction
The Model 42i Chemiluminescence NO-NO2-NOx Analyzer combines
proven detection technology, easy to use menu-driven software, and
advanced diagnostics to offer unsurpassed flexibility and reliability. The
Model 42i has the following features:
● 320 x 240 graphics display
● Menu-driven software
● Field programmable ranges
● User-selectable single/dual/auto range modes
● Multiple user-defined analog outputs
● Analog input options
● High sensitivity
● Fast response time
● Linearity through all ranges
● Internal sample pump (except with internal permeation span source
option)
● Independent NO-NO
● Replaceable NO
● User-selectable digital input/output capabilities
● Standard communications features include RS232/485 and Ethernet
● C-Link, MODBUS, Geysitech (Bayern-Hessen), and streaming data
2
-NOx ranges
2
converter cartridge
protocols
For details of the analyzer’s principle of operation and product
specifications, see the following topics:
● “Principle of Operation” on page 1-2
● “Specifications” on page 1-3
Thermo Fisher Scientific Model 42i Instruction Manual 1-1
Introduction
ν
Principle of Operation
Thermo Fisher Scientific is pleased to supply this NO-NO2-NOx analyzer.
We are committed to the manufacture of instruments exhibiting high
standards of quality, performance, and workmanship. Service personnel are
available for assistance with any questions or problems that may arise in the
use of this analyzer. For more information on servicing, see Chapter 7,
“Servicing”.
Principle of
Operation
The Model 42i operates on the principle that nitric oxide (NO) and ozone
(O3) react to produce a characteristic luminescence with an intensity
linearly proportional to the NO concentration. Infrared light emission
results when electronically excited NO2 molecules decay to lower energy
states. Specifically:
O + NO
→
NO
h + O +
223
Nitrogen dioxide (NO2) must first be transformed into NO before it can
be measured using the chemiluminescent reaction. NO2 is converted to
NO by a molybdenum NO2-to-NO converter heated to about 325 °C (the
optional stainless steel converter is heated to 625 °C).
The ambient air sample is drawn into the Model 42i through the sample
bulkhead, as shown in Figure 1–1. The sample flows through a capillary,
and then to the mode solenoid valve. The solenoid valve routes the sample
either straight to the reaction chamber (NO mode) or through the NO2-toNO converter and then to the reaction chamber (NOx mode). A flow
sensor to the reaction chamber measures the sample flow.
Dry air enters the Model 42i through the dry air bulkhead, passes through
a flow switch, and then through a silent discharge ozonator. The ozonator
generates the ozone needed for the chemiluminescent reaction. At the
reaction chamber, the ozone reacts with the NO in the sample to produce
excited NO
molecules. A photomultiplier tube (PMT) housed in a
2
thermoelectric cooler detects the luminescence generated during this
reaction. From the reaction chamber, the exhaust travels through the ozone
(O3) converter to the pump, and is released through the vent.
The NO and NOx concentrations calculated in the NO and NOx modes
are stored in memory. The difference between the concentrations is used to
calculate the NO
concentration. The Model 42i outputs NO, NO2, and
2
NOx concentrations to the front panel display, the analog outputs, and also
makes the data available over the serial or Ethernet connection.
1-2 Model 42i Instruction Manual Thermo Fisher Scientific
Figure 1–1. Model 42i Flow Schematic
Introduction
Specifications
Specifications
Table 1–1 lists the specifications for the Model 42i.
Table 1–1. Model 42i Specifications
Preset ranges 0-0.05, 0.1, 0.2, 0.5, 1, 2, 5, 10, 20 ppm
0-0.1, 0.2, 0.5, 1, 2, 5, 10, 20, 30 mg/m
Extended ranges 0-0.2, 0.5, 1, 2, 5, 10, 20, 50, 100 ppm
0-0.5, 1, 2, 5, 10, 20, 50, 100, 150 mg/m
Custom ranges 0-0.05 to 20 ppm (0-0.2 to 100 ppm in extended ranges)
0-0.1 to 30 mg/m
Zero roise 0.20 ppb RMS (60 second averaging time)
Lower detectable limit 0.40 ppb (60 second averaging time)
Zero drift (24 hour) < 0.40 ppb
Span drift ±1% full-scale
Response time (in
automatic mode)
Linearity ±1% full-scale
40 seconds (10 second averaging time)
80 seconds (60 second averaging time)
300 seconds (300 second averaging time)
3
(0-0.5 to 150 mg/m3 in extended ranges)
3
3
Sample flow rate 0.6–0.8 LPM
Operating temperature 15–35 °C (may be safely operated over the 0–45 °C)*
Thermo Fisher Scientific Model 42i Instruction Manual 1-3
Introduction
Specifications
Power requirements
Physical dimensions 16.75” (W) X 8.62” (H) X 23” (D)
Weight Approximately 55 lbs.
Analog outputs 6 voltage outputs; 0–100 mV, 1, 5, 10 V (User selectable), 5% of
Digital outputs 1 power fail relay Form C, 10 digital relays Form A, user
Digital inputs 16 digital inputs, user select programmable, TTL level, pulled
Serial Ports 1 RS-232 or RS-485 with two connectors, baud rate 1200–
Ethernet connection RJ45 connector for 10Mbs Ethernet connection, static or
*In non-condensing environments. Performance specifications based on operation in 15–35 °C range.
100 VAC @ 50/60 Hz
115 VAC @ 50/60 Hz
220–240 VAC @ 50/60 Hz
300 watts
full-scale over/under range, 12 bit resolution, user
programmable
selectable alarm output, relay logic, 100 mA @ 200 VDC
high
115200, Protocols: C-Link, MODBUS, Geysitech (Bayern-Hessen),
and streaming data (all user selectable)
dynamic TCP/IP addressing
Table 1–2. Model 42i Optional Permeation Oven Specifications
Temperature control Single Point 45
Temperature stability ±0.1
Warm-up time 1 hour (permeation device can take 24 to 48 hours to stabilize)
Carrier gas flow ≈ 70 scc/min
Chamber size Accepts permeation tubes up to 9 cm in total length; 1 cm in
Temperature range 15–30 °C
Power requirements 120 VAC @ 50/60 Hz, 50 watts (in addition to the standard
Weight Approximately 5 lbs. (in addition to the standard Model 42i)
°C
diameter
Model 42i)
°C
1-4 Model 42i Instruction Manual Thermo Fisher Scientific
Chapter 2
Installation
Installing the Model 42i includes the following recommendations and
procedures:
● “Lifting” on page 2-1
● “Unpacking and Inspection” on page 2-1
● “Setup Procedure” on page 2-3
● “Connecting External Devices” on page 2-5
● “Startup” on page 2-9
Lifting
Unpacking and
Inspection
When lifting the instrument, use procedure appropriate to lifting a heavy
object, such as, bending at the knees while keeping your back straight and
upright. Grasp the instrument at the bottom in the front and at the rear of
the unit. Although one person can lift the unit, it is desirable to have two
persons lifting, one by grasping the bottom in the front and the other by
grasping the bottom in the rear.
Equipment Damage Do not attempt to lift the instrument by the cover or
other external fittings. ▲
The Model 42i is shipped complete in one container. If there is obvious
damage to the shipping container when you receive the instrument, notify
the carrier immediately and hold for inspection. The carrier is responsible
for any damage incurred during shipment.
Use the following procedure to unpack and inspect the instrument.
1. Remove the instrument from its shipping container and set it on a table
or bench that allows easy access to both the front and rear.
2. Remove the cover to expose the internal components.
3. Remove the packing material (Figure 2–1).
Thermo Fisher Scientific Model 42i Instruction Manual 2-1
Installation
Unpacking and Inspection
Remove Packing
(2 pieces)
Remove Packing
(2 pieces)
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 ).
Shipping Screws (3)
Figure 2–2. Remove the Shipping Screws
5. Check for possible damage during shipment.
6. Check that all connectors and circuit boards are firmly attached.
2-2 Model 42i Instruction Manual Thermo Fisher Scientific
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