Ecotech Serinus 40 User manual

Introduction
Page 1
Serinus 40
Oxides of Nitrogen
Analyser
User Manual
Version: 2.2
www.ecotech.com

Serinus 40 User Manual 2.2
Page 2
This page is intentionally blank

Introduction
Page 3
Table of Contents
Manufacturer’s Statement ..............................................................................................................................................10
Notice ..............................................................................................................................................................................10
Safety Requirements .......................................................................................................................................................11
Warranty..........................................................................................................................................................................11
Service and Repairs..........................................................................................................................................................12
CE Mark Declaration of Conformity .................................................................................................................................13
Claims for Damaged Shipments and Shipping Discrepancies ..........................................................................................14
Internationally Recognised Symbols on Ecotech Equipment...........................................................................................15
Manual Revision History ..................................................................................................................................................16
1. Introduction....................................................................................................................................19
1.1 Description ..........................................................................................................................................................19
1.2 Specifications ......................................................................................................................................................19
1.2.1 Measurement ......................................................................................................................................19
1.2.2 Precision/Accuracy ..............................................................................................................................19
1.2.3 Calibration ...........................................................................................................................................20
1.2.4 Power ................................................................................................................................................20
1.2.5 Operating Conditions...........................................................................................................................20
1.2.6 Communications..................................................................................................................................21
1.2.7 Physical Dimensions.............................................................................................................................21
1.2.8 Certifications........................................................................................................................................21
1.3 Nomenclature .....................................................................................................................................................22
1.4 Background/Theory.............................................................................................................................................23
1.4.1 Measurement Theory ..........................................................................................................................23
1.4.2 Kalman Filter Theory............................................................................................................................24
1.5 Instrument Description .......................................................................................................................................25
1.5.1 Calibration Valve Manifold ..................................................................................................................25
1.5.2 Auxiliary Valve Manifold ......................................................................................................................25
1.5.3 Particulate Filter ..................................................................................................................................25
1.5.4 Delay Loop ...........................................................................................................................................25
1.5.5 Dryer ................................................................................................................................................26
1.5.6 Ozone Generator .................................................................................................................................26
1.5.7 NO2to NO Converter ...........................................................................................................................26
1.5.8 Pressure Transducer PCBs ...................................................................................................................26
1.5.9 Optical Cell...........................................................................................................................................26
1.5.10 Main Controller PCB ............................................................................................................................27
1.5.11 Power Supply .......................................................................................................................................27
1.5.12 On/Off Switch ......................................................................................................................................27
1.5.13 Communications..................................................................................................................................27
2. Installation......................................................................................................................................31
2.1 Initial Check.........................................................................................................................................................31
2.2 Mounting/Installing.............................................................................................................................................32
2.3 Instrument Set-up ...............................................................................................................................................33
2.3.1 Pneumatic Connections .......................................................................................................................33
2.3.2 Power Connections..............................................................................................................................34

Serinus 40 User Manual 2.2
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2.3.3 Communications Connections............................................................................................................. 34
2.3.4 Analyser Set-up ................................................................................................................................... 35
2.4 U.S. EPA Reference Set-up.................................................................................................................................. 36
2.5 EN Type Approval Set-up .................................................................................................................................... 37
2.6 Transporting/Storage.......................................................................................................................................... 37
3. Operation....................................................................................................................................... 39
3.1 Warm-up............................................................................................................................................................. 39
3.2 Measurement ..................................................................................................................................................... 39
3.3 General Operational Information ....................................................................................................................... 40
3.4 Main Display ....................................................................................................................................................... 42
3.5 Menus & Screens ................................................................................................................................................ 43
3.5.1 Quick Menu......................................................................................................................................... 43
3.5.2 Main Menu.......................................................................................................................................... 44
3.5.3 Analyser State ..................................................................................................................................... 45
3.5.4 Status ................................................................................................................................................ 45
3.5.5 Temperatures...................................................................................................................................... 46
3.5.6 Pressures & Flow................................................................................................................................. 46
3.5.8 Voltages............................................................................................................................................... 47
3.5.9 General Settings .................................................................................................................................. 47
3.5.10 Measurement Settings ........................................................................................................................ 48
3.5.11 Calibration Menu ................................................................................................................................ 49
3.5.12 Manual Mode...................................................................................................................................... 50
3.5.13 Timed Mode ........................................................................................................................................ 51
3.5.14 Service ................................................................................................................................................ 51
3.5.15 Diagnostics .......................................................................................................................................... 52
3.5.16 Digital Pots .......................................................................................................................................... 53
3.5.17 Valve Menu ......................................................................................................................................... 54
3.5.19 Tests ................................................................................................................................................ 55
3.5.20 Calculation Factors .............................................................................................................................. 55
3.5.21 Communications Menu ....................................................................................................................... 55
3.5.22 Data Logging Menu ............................................................................................................................. 56
3.5.23 Serial Communications........................................................................................................................ 56
3.5.24 Analog Input Menu ............................................................................................................................. 57
3.5.25 Analog Output Menu........................................................................................................................... 58
3.5.26 Digital Inputs Menu............................................................................................................................. 59
3.5.27 Digital Outputs Menu.......................................................................................................................... 59
3.5.28 Network Adaptor Menu ...................................................................................................................... 60
4. Communications............................................................................................................................ 63
4.1 RS232 Communication........................................................................................................................................ 63
4.2 USB Communication ........................................................................................................................................... 63
4.3 TCP/IP Network Communication (optional) ....................................................................................................... 64
4.4 Digital/Analog Communication........................................................................................................................... 64
4.4.1 Analog Outputs ................................................................................................................................... 64
4.4.2 Analog Output Calibration Procedure ................................................................................................. 65
4.4.3 Analog Inputs ...................................................................................................................................... 65
4.4.4 Digital Status Inputs ............................................................................................................................ 65
4.4.5 Digital Status Outputs ......................................................................................................................... 65
4.5 Using Airodis Software to Download Data from a Serinus Gas Analyser............................................................ 67

Introduction
Page 5
4.5.1 Installation ...........................................................................................................................................67
4.5.2 Connecting the Serinus to your PC ......................................................................................................67
4.5.3 Installing Airodis ..................................................................................................................................70
4.5.4 Configuring Airodis ..............................................................................................................................71
4.6Serinus Remote App/Bluetooth ..........................................................................................................................76
4.6.1 Installation ...........................................................................................................................................76
4.6.2 Connecting to the Analyser .................................................................................................................77
4.6.3 Control Serinus Analyser......................................................................................................................78
4.6.4 Real-time Plot ......................................................................................................................................80
4.6.5 Download.............................................................................................................................................81
4.6.6 Get Parameters....................................................................................................................................81
4.6.7 Preferences..........................................................................................................................................82
5. Calibration ......................................................................................................................................85
5.1 Zero Calibration...................................................................................................................................................85
5.2 Span Calibration ..................................................................................................................................................86
5.3 Multipoint Precision Check .................................................................................................................................87
5.4 Precision Check ...................................................................................................................................................89
5.5 Converter Efficiency ............................................................................................................................................89
5.6 Pressure Calibration ............................................................................................................................................90
5.7 High Pressure Zero/Span Valve ...........................................................................................................................94
5.7.1 Single Pressurised Calibration Option..................................................................................................94
5.7.2 Dual Pressurised Calibration Option....................................................................................................95
6. Service ............................................................................................................................................97
6.1 Pneumatic Diagram .............................................................................................................................................97
6.2 Maintenance Tools..............................................................................................................................................97
6.3 Maintenance Schedule........................................................................................................................................98
6.4 Maintenance Procedures ....................................................................................................................................98
6.4.1 Particulate Filter Replacement ............................................................................................................98
6.4.2 Clean Fan Filter ....................................................................................................................................99
6.4.3 DFU Replacement ..............................................................................................................................100
6.4.4 Quick Leak Test..................................................................................................................................100
6.4.5 Full Leak Check ..................................................................................................................................101
6.4.6 Replacing the PMT Desiccant Pack. ...................................................................................................103
6.4.7 Cleaning the Reaction Cell .................................................................................................................104
6.4.8 Clean Pneumatics ..............................................................................................................................105
6.4.9 Pressure Sensor Check.......................................................................................................................105
6.4.10 Battery Replacement .........................................................................................................................107
6.4.11 Ozone Generator Maintenance .........................................................................................................107
6.5 Parts List............................................................................................................................................................110
6.6 Bootloader ........................................................................................................................................................112
6.6.1 Display Help Screen ...........................................................................................................................112
6.6.2 Communications Port Test ................................................................................................................112
6.6.3 Updating Firmware ............................................................................................................................113
6.6.4 Erase All Settings................................................................................................................................113
6.6.5 Start Analyser ....................................................................................................................................113
7. Troubleshooting ...........................................................................................................................115
7.1 Flow Fault..........................................................................................................................................................118

Serinus 40 User Manual 2.2
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7.2 Noisy/Unstable Readings.................................................................................................................................. 119
7.3 Converter Temperature Failure ........................................................................................................................ 120
7.4 Flow Block Temperature Failure ....................................................................................................................... 121
7.5 Reaction Cell Temperature Failure ................................................................................................................... 122
8. Optional Extras............................................................................................................................. 123
8.1 Dual Sample Filter PN E020100 ........................................................................................................................ 123
8.2 Rack Mount Kit PN E020116 ............................................................................................................................. 123
8.3 High Pressure Zero/Span Valves ....................................................................................................................... 127
8.4 High Level Option ............................................................................................................................................. 128
Appendix A. Advanced Protocol Parameter List ....................................................................... 129
Appendix B. EC9800 Protocol ................................................................................................... 139
Appendix C. Bavarian Protocol ................................................................................................. 141
Appendix D. Modbus Protocol .................................................................................................. 147
List of Figures
Figure 1 –Simple pneumatic diagram................................................................................................... 24
Figure 2 –Internal components diagram .............................................................................................. 25
Figure 3 –Opening the instrument ....................................................................................................... 31
Figure 4 –Instrument back panel.......................................................................................................... 33
Figure 5 –Switching the battery on/off ................................................................................................ 38
Figure 6 –Serinus front panel ............................................................................................................... 40
Figure 7 –Main screen display .............................................................................................................. 42
Figure 8 –Main menu............................................................................................................................ 44
Figure 9 –Communication ports ........................................................................................................... 63
Figure 10 –Serinus 25 pin microprocessor board (with default jumpers highlighted)......................... 66
Figure 11 –External 25 pin I/O individual pin descriptions................................................................... 66
Figure 12 –Configure Serinus logging interval...................................................................................... 67
Figure 13 –Installing driver software.................................................................................................... 67
Figure 14 –Installing driver software.................................................................................................... 68
Figure 15 –Installing driver software.................................................................................................... 68
Figure 16 –Installing driver ................................................................................................................... 69
Figure 17 –Successful driver installation .............................................................................................. 69
Figure 19 –Serial communications menu ............................................................................................. 70
Figure 20 –Network adaptor menu ...................................................................................................... 70
Figure 21 –Airodis workspace manager ............................................................................................... 71
Figure 22 –Adding a new station .......................................................................................................... 71
Figure 23 –New station connection...................................................................................................... 72
Figure 24 –Station configuration .......................................................................................................... 73
Figure 25 –Error status notification...................................................................................................... 73

Introduction
Page 7
Figure 26 –Downloading data ...............................................................................................................74
Figure 27 –Download data status..........................................................................................................74
Figure 28 –Data visibility .......................................................................................................................75
Figure 29 –Exporting data .....................................................................................................................75
Figure 30 –Data download complete ....................................................................................................76
Figure 31 –Downloading the app from Google Play Store....................................................................77
Figure 32 –Bluetooth pairing request ...................................................................................................77
Figure 33 –Entering numbers into the Serinus Application ..................................................................78
Figure 34 –Switching analysers in the Serinus Application ...................................................................79
Figure 35 –Real-time plot......................................................................................................................80
Figure 36 –Plot of downloaded data.....................................................................................................81
Figure 37 –Directory settings ................................................................................................................82
Figure 38 –Logs format..........................................................................................................................82
Figure 39 –Colour theme settings .........................................................................................................83
Figure 40 –Excel graph of multipoint calibration ..................................................................................88
Figure 41 –Vacuum calibration, ozone generator offline warning .......................................................90
Figure 42 –Vacuum calibration, on-screen instructions .......................................................................90
Figure 43 –Blocking exhaust T-piece.....................................................................................................91
Figure 44 –Position of barometer placement (valve manifold) ............................................................91
Figure 45 –Rear analyser ports..............................................................................................................92
Figure 46 –Vacuum calibration, entering vacuum set point .................................................................92
Figure 47 –Vacuum calibration, on-screen instructions .......................................................................93
Figure 48 –Setting the ambient set point..............................................................................................93
Figure 49 –Return to normal mode notice............................................................................................94
Figure 50 –Single high pressure calibration option...............................................................................95
Figure 51 –Dual high pressure calibration option.................................................................................96
Figure 52 - Pneumatic diagram ..............................................................................................................97
Figure 53 –Removing plunger ...............................................................................................................99
Figure 54 –Removing the fan filter........................................................................................................99
Figure 55 –DFU filter ...........................................................................................................................100
Figure 56 –Plugged Sample, Background, and Calibration Ports ........................................................101
Figure 57 –Pressure gauge on exhaust................................................................................................102
Figure 58 –Removing the reaction cell or desiccant pack...................................................................103
Figure 59 –Optical filter removal and cleaning ...................................................................................105
Figure 60 –Test point location.............................................................................................................106
Figure 61 –Typical test point reading of cell pressure with vacuum connected to exhaust port.......106
Figure 62 –Typical test point reading of manifold pressure sensor....................................................106
Figure 63 –Ozone generator assembly................................................................................................107
Figure 64 –Ozone generator cell assembly .........................................................................................108
Figure 65 –Removing ozone generator cell assembly.........................................................................108
Figure 66 –Disassembled ozone generator cell assembly...................................................................109
Figure 67 –Replacing Viton O-rings .....................................................................................................109
Figure 68 –Zero flow fault troubleshooting flow chart.......................................................................118
Figure 69 –Noisy or unstable readings troubleshooting flow chart....................................................119

Serinus 40 User Manual 2.2
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Figure 70 –Converter alarm troubleshooting flow chart.................................................................... 120
Figure 71 –Valve manifold temperature alarm troubleshooting flowchart....................................... 121
Figure 72 –Reaction cell temperature failure troubleshooting flow chart......................................... 122
Figure 73 –Dual filter option installed................................................................................................ 123
Figure 74 –Separate rack slides .......................................................................................................... 124
Figure 75 –Assemble inner slide on chassis........................................................................................ 124
Figure 76 –Attach rack mount adaptors to outer slides..................................................................... 125
Figure 77 –Attach slides to front of rack ............................................................................................ 125
Figure 78 –Attach rack mount adaptors to outer slides..................................................................... 125
Figure 79 –Attach rear rack mount adaptors to slide......................................................................... 126
Figure 80 –Rack mount ears fitted to analyser................................................................................... 126
Figure 81 –Rack installation................................................................................................................ 127
Figure 82 –Serinus 40 high level pneumatic diagram......................................................................... 128

Introduction
Page 9
List of Tables
Table 1 –Manual revision history ..........................................................................................................16
Table 2 –Sample cycle, 5 times per cycle ..............................................................................................39
Table 3 –Background cycle, once per cycle...........................................................................................40
Table 4 –Digital pots..............................................................................................................................53
Table 5 –Analog outputs .......................................................................................................................64
Table 6 –Setting up a new station via Airodis .......................................................................................72
Table 7 –Maintenance schedule ...........................................................................................................98
Table 8 –Spare parts list ......................................................................................................................110
Table 9 –Serinus maintenance kit .......................................................................................................111
Table 10 –Other consumables (not listed in maintenance kit) ...........................................................112
Table 11 - Troubleshoot list.................................................................................................................115
Table 12 - Advanced protocol parameter list......................................................................................129
Table 13 –Block check calculation.......................................................................................................141
Table 14 –Block check operation ........................................................................................................142
Table 15 –Bavarian protocol commands.............................................................................................143
Table 16 –Bit map................................................................................................................................144
Table 17 –Bit map (positive logic) .......................................................................................................144
List of Equations
Equation 1 –Chemiluminescence reaction for NO................................................................................23
Equation 2 –NO2calculation..................................................................................................................24
Equation 3 –Instrument accuracy .........................................................................................................87
Equation 4 –Calculation for converter efficiency..................................................................................89

Serinus 40 User Manual 2.2
Page 10
Manufacturer’s Statement
Thank you for selecting the Ecotech Serinus 40 Oxides of Nitrogen Analyser.
The Serinus series is the next generation of Ecotech designed and manufactured gas analysers. The
Serinus 40 will perform oxides of nitrogen measurements over a range of 0-20ppm with a lower
detectable limit of 0.4 ppb.
This User Manual provides a complete product description including operating instructions,
calibration, and maintenance requirements for the Serinus 40.
Reference should also be made to the relevant local standards which should be used in conjunction
with this manual. Some relevant standards are listed in the references section of this manual.
If, after reading this manual you have any questions or you are still unsure or unclear on any part of
the Serinus 40 then please do not hesitate to contact Ecotech or your local Ecotech distributor.
Please help the environment and recycle the pages of this manual when you have finished
using it.
Notice
The information contained in this manual is subject to change without notice. Ecotech reserves the
right to make changes to equipment construction, design, specifications and /or procedures without
notice.
Copyright © 2013. All rights reserved. Reproduction of this manual, in any form, is prohibited
without the written consent of Ecotech Pty Ltd.
CAUTION
Hazardous voltages exist within the analyser. The analyser lid should be closed
when the analyser is left unattended or turned on. Ensure the power cable,
plugs and sockets are maintained in a safe working condition.

Introduction
Page 11
Safety Requirements
To reduce the risk of personal injury caused by electrical shock, follow all safety notices and warnings
in this documentation.
If the equipment is used for purposes not specified by Ecotech, the protection provided by this
equipment may be impaired.
Replacement of any part should only be carried out by qualified personnel, using only parts specified
by Ecotech as these parts meet stringent Ecotech quality assurance standards. Always disconnect the
power source before removing or replacing any components.
Warranty
This product has been manufactured in an ISO 9001/ISO 14001 facility with care and attention to
quality.
The product is subject to a 24-month warranty on parts and labour from date of shipment. The
warranty period commences when the product is shipped from the factory. Lamps, fuses, filters,
batteries and other consumable items are not covered by this warranty.
Each analyser is subjected to a vigorous testing procedure prior to despatch and will be accompanied
with a parameter list and a multipoint calibration check thereby enabling the analyser to be installed
and ready for use without any further testing.

Serinus 40 User Manual 2.2
Page 12
Service and Repairs
Our qualified and experienced technicians are available to provide fast and friendly service between
the hours of 8:30am –5:00pm AEST Monday to Friday. You are welcome to speak to a service
technician regarding any questions you have about your analyser.
Service Guidelines
In the first instance, please call or email us if you are experiencing any problems or issues with your
analyser.
If you are within Australia or New Zealand please contact our service response centre via email on
[email protected]om.au or call [phone].
If outside of Australia and New Zealand please email our international support department at
[email protected]om or call [phone].
If we cannot resolve the problem through technical support, please email the following information:
Name and phone number
Company name
Shipping address
Quantity of items being returned
Model number/s or a description of each item
Serial number/s of each item (if applicable)
A description of the problem
Original sales order or invoice number related to the equipment
When you email us we will assign a Return Material Authorisation (RMA) number to your shipment
and initiate the necessary paperwork to process your equipment within 48 hours.
Please include this RMA number when you return equipment, preferably both inside and outside the
shipping packaging. This will ensure you receive prompt service.

Introduction
Page 13
CE Mark Declaration of Conformity
This declaration applies to the Serinus 40 Oxides of Nitrogen Analyser as manufactured by Ecotech
Pty. Ltd. of 1492 Ferntree Gully Rd, Knoxfield, VIC, 3180, Australia. The instrument to which this
declaration relates is in conformity with the following European Union Directives:
Council Directive of 15 December 2004 on the approximation of the laws of Member States
relating to electromagnetic compatibility (2004/108/EC)
The following standard was applied:
EN 61326-1:2006 Electrical equipment for measurement, control and laboratory use –EMC
requirements –Part 1: General requirements.
Immunity Requirements EN 61326-1
IEC-61000-4-2 Electrostatic discharge immunity
IEC-61000-4-3 Radiated RF immunity
IEC-61000-4-4 Electrical fast transient burst immunity
IEC-61000-4-5 Surge immunity
IEC-61000-4-6 Conducted RF immunity
IEC-61000-4-11 Voltage dips and interruption immunity
Electromagnetic Compatibility EN 61326-1
CISPR-11 Radiated RF emission measurements
CISPR-11 Mains terminal RF emission measurements
IEC-61000-3-3 Mains terminal voltage fluctuation measurements
IEC-61000-3-2 Power frequency harmonic measurements
Council Directive of 12 December 2006 on the harmonization of the laws of Member States relating
to electrical equipment designed for use within certain voltage limits (2006/95/EC)
The following standard was applied:
EN 61010-1:2001 Safety requirements for electrical equipment, for measurement control
and laboratory use –Part 1: General requirements
For protection against:
Electric shock or burn
Mechanical HAZARDS
Excessive temperature
Spread of fire from the equipment
Effects of radiation, including laser sources and sonic and ultrasonic pressure

Serinus 40 User Manual 2.2
Page 14
Claims for Damaged Shipments and Shipping Discrepancies
Damaged Shipments
Inspect all instruments thoroughly on receipt. Check materials in the container/s against the
enclosed packing list. If the contents are damaged and/or the instrument fails to operate properly,
notify the carrier and Ecotech immediately.
The following documents are necessary to support claims:
Original freight bill and bill of lading
Original invoice or photocopy of original invoice
Copy of packing list
Photographs of damaged equipment and container
You may want to keep a copy of these documents for your records.
Please refer to the instrument name, model number, serial number, sales order number, and your
purchase order number on all claims.
You should also:
Contact you freight forwarder for an insurance claim
Retain packing material for insurance inspection
Shipping Discrepancies
Check all packages against the packing list immediately on receipt. If a shortage or other discrepancy
is found, notify the carrier and Ecotech immediately. We will not be responsible for shortages against
the packing list unless they are reported promptly (within 7 days).
Contact Details
Head Office
1492 Ferntree Gully Road, Knoxfield VIC Australia 3180
Phone: [phone] Fax: [phone]
Email: inf[email protected]
Service: [e-mail]
International Support: ints[email protected]m
www.ecotech.com

Introduction
Page 15
Internationally Recognised Symbols on Ecotech Equipment
Electrical fuse
IEC 60417-5016
Earth (ground) terminal
IEC 60417-5017
Protective conductor terminal
IEC 60417-5017
Equipotentiality
IEC 60417-5021
Alternating current
IEC 60417-5032
Caution, hot surface
IEC 60417-5041
Caution, risk of danger. Refer to accompanying
documents
ISO 7000-0434
Caution, risk of electric shock
ISO 3864-5036

Serinus 40 User Manual 2.2
Page 16
Manual Revision History
Manual PN: M010028
Current revision: 2.2
Date released: 10 December 2013
Description: User Manual for the Serinus 40 Oxides of Nitrogen Analyser
This manual is the full user manual for the Serinus 40 Oxides of Nitrogen Analyser. This manual
contains all relevant information on theory, specifications, installation, operation, maintenance and
calibration. Any information that cannot be found within this manual can be obtained by contacting
Ecotech.
Table 1 –Manual revision history
Edition
Date
Summary
Pages
1.0
September 2008
Initial release
all
1.1
February 2009
General updates, specifications and menu updates
all
1.2
March 2009
New maintenance procedures
Updated analyser setup
Small corrections
New menu items added
40, 51
12
Various
19-31
1.3
June 2009
Small correction
Section 4.5 and 4.6 swapped
Updated exhaust description
Various
37-38
11
1.4
November 2009
Small correction
Included Serinus downloader info
Included advanced protocol
Various
From 55
129
1.5
February 2010
Minor changes section 3.5.14
Updated parts list
51
110
1.6
September 2010
CE conformity added
Pressurised span/zero added
Updates to rack mount option
Updates to Serinus downloader
Update to 25 pin I/O network communications
12
123
58
60
64
1.7
January 2011
High level option added
Updates to power specifications/battery
Updates to serial communications
Updated maintenance kit
128
Various
56
110

Introduction
Page 17
Edition
Date
Summary
Pages
1.8
September 2011
Analog inputs
Network adapter menu
General overhaul of manual drawings, pictures and
content
Various
2.0
July 2012
New chassis
Update menu system
Add Bluetooth menu
Serinus remote Android app
Rack mount procedure update
Analog output calibration
Various
2.1
March 2013
General overhaul of manual drawings, pictures and
content. Format updated
Various
2.2
October 2013
Reformatting of manual with some small technical
changes
Various
2.2
November 2013
Addition of Airodis installation steps
67-76

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Introduction
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1. Introduction
1.1 Description
The Serinus 40 Oxides of Nitrogen Analyser uses gas phase chemiluminescence detection to perform
continuous analysis of nitric oxide (NO), total oxides of nitrogen (NOx) and nitrogen dioxide (NO2).
The Serinus 40 analyser measures to a sensitivity of 0.4 ppb with a range of 0-20 ppm. The
measurement of these three gases is performed with the following main sub-components:
NO2to NO converter
Delay coil (NOXchannel)
Ozone generator
Reaction cell
Photomultiplier tube (PMT)
A microprocessor programmed with Serinus firmware monitors the detector response and many
other parameters. The concentrations are automatically corrected for gas temperature and pressure
changes and when using gravimetric units (e.g. µg/m³) is referenced to 0°C, 20°C or 25°C at 1
atmosphere. This allows the Serinus 40 to provide readings in the relevant units for your
requirements.
The U.S. EPA has designated the Serinus 40 Oxides of Nitrogen Analyser as a reference method and
SIRA has designated it as an EN approved instrument.
1.2 Specifications
1.2.1 Measurement
Range
0-20 ppm auto ranging.
USEPA designated range: 0-0.5 ppm.
MCERTS EN certification ranges: NO (0 to 1,000 ppb) NO2(0 to 260 ppb).
Lower detectable limit: 0.4 ppb, with Kalman filter active.
1.2.2 Precision/Accuracy
Precision
0.4 ppb otherwise 0.5% of reading, whichever is greater.
Linearity
±1% of full scale.

Serinus 40 User Manual 2.2
Page 20
Response Time
15 seconds to 90%.
Sample Flow Rate
0.3 SLPM (0.6 SLPM total flow for two channels).
1.2.3 Calibration
Zero Drift
Temperature dependant: 0.1 ppb per °C.
24 hours: < 0.4 ppb
7 days: < 1.0 ppb
Span Drift
Temperature dependant: 0.1% per °C
7 days: < 1.0% of reading
1.2.4 Power
Operating Voltage
99 to 132 VAC (57-63 Hz) or via switch 198 to 264 VAC (47 to 53 Hz).
U.S. EPA designated range: 105 to 125 VAC, 60 Hz.
Power Consumption
265 VA max. (typical at start-up).
190 VA after warm-up.
Fuse Rating
20x5 mm, T 250V, 5 A (slow blow).
1.2.5 Operating Conditions
Ambient Temperature Range
0 °C to 40 °C (32 °F to 104 °F).
U.S. EPA designated range: 20 °C to 30 °C.
Sample Pressure Dependence
5% change in pressure produces less than a 1% change in reading.
Maximum altitude: 3000 m above sea level.