2B Technologies 405 nm User manual

Model 405 nm NO2/NO/NOxMonitor Manual Rev. D
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NO2/NO/NOxMonitor
2BTechnologies, Inc.
OPERATION MANUAL
Model 405 nm
© Copyright 2016, 2B Technologies, Inc.
All rights reserved.
Technical Support:
www.twobtech.com/techsupport
[e-mail]
[phone]

Model 405 nm NO2/NO/NOxMonitor Manual Rev. D
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Contents
IDENTIFICATION RECORDS iv
PRINTING HISTORY v
WARRANTY STATEMENT vi
WARNINGS viii
1. NO2/NO/NOXMONITOR INTRODUCTION 1
1.1. Theory of Operation................................................................................................................. 2
1.2. Adaptive Filter.......................................................................................................................... 4
2. NO2/NO/NOXMONITOR SPECIFICATIONS 5
3. OPERATION 6
3.1. Shipping Box Contents............................................................................................................ 6
3.2. Pre-Operation Flow Settings of the Monitor............................................................................ 6
3.3. Operation of the Monitor.......................................................................................................... 7
3.4. Connections and Setup ........................................................................................................... 7
3.5. Measurement of the Zero Offset; Auto Zero Function............................................................. 8
3.6. Collecting Data from the Analog Output.................................................................................. 8
3.7. Collecting Data over the Serial Port in Real Time................................................................... 8
3.8. Data Averaging and Data Logging ........................................................................................10
3.9. Summary of Operating Recommendations ...........................................................................10
4. THE MENU 11
4.1. Menu Tree .............................................................................................................................12
4.2. To Start Logging Data ...........................................................................................................13
4.3. To Stop Logging Data............................................................................................................ 14
4.4. To Transmit Logged Data......................................................................................................15
4.5. To Average Data....................................................................................................................15
4.6. Instrument Configuration .......................................................................................................16
4.7. To Set the Time and Date .....................................................................................................16
4.8 Calibration Parameters - Overview........................................................................................16
4.9. To Set the NO2and NO Calibration Parameters................................................................... 17
4.10. To Set the Flow Meter Slopes............................................................................................... 18
4.11. To Change the Output Baud Rate.........................................................................................18
4.12. To Change the Analog Output Scaling Factor....................................................................... 19
4.13.To Read the Number of Hours of Monitor Use...................................................................... 19
4.14. Measurement Units ...............................................................................................................19
4.14.1.. To Change the Units for Internal Cell Temperature and Pressure ..........................19
4.14.2.. To Change the Units for NO2and NO...................................................................... 20
4.15. To Test the LED Voltage and Precision ................................................................................20
4.16. Measurement Modes............................................................................................................. 20
4.16.1.. NO2Mode................................................................................................................. 21
4.16.2.. NO2and NO Mode ................................................................................................... 21
4.16.3.. NO Mode..................................................................................................................21
4.17. Auto Zeroing.......................................................................................................................... 21
4.17.1.. Zero Duration ........................................................................................................... 21
4.17.2.. Zero Frequency........................................................................................................21
5. REMOTE CONTROL VIA SERIAL CONNECTION 22

Model 405 nm NO2/NO/NOxMonitor Manual Rev. D
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6. MAINTENANCE 24
7. CALIBRATION 25
7.1. Introduction............................................................................................................................ 25
7.1.1.... Equipment Required................................................................................................. 25
7.1.2.... Setup Check............................................................................................................. 26
7.2. Calibration Procedure............................................................................................................26
7.2.1.... Instrument Preparation.............................................................................................26
7.2.2.... Measurement of Zero Air.......................................................................................... 27
7.2.3.... Measurement of NO2and NO Standards.................................................................27
7.2.4.... Calibration Curve...................................................................................................... 27
8. PERIODIC ZERO AND SPAN CHECKS 28
9. TROUBLESHOOTING 29
10. INSTRUMENT LAYOUT 32
11. WIRING CONNECTIONS 38
12. SPARE PARTS 39
13. SERVICE LOG 40
Appendix A: Using the 2B Technologies Display and Graphing Software 42

Model 405 nm NO2/NO/NOxMonitor Manual Rev. D
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IDENTIFICATION RECORDS
Record the following information for future reference:
Unit serial number: ______________________________________
Warranty start date: _______________________________________
(date of receipt)

Model 405 nm NO2/NO/NOxMonitor Manual Rev. D
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PRINTING HISTORY
This manual covers the Model 405 nm NO2/NO/NOxMonitor™used for measurement
of atmospheric nitrogen dioxide (NO2), nitric oxide (NO) and NOx(NO + NO2) over a
dynamic range extending from a few parts per billion by volume (referred to herein as
simply ppb) up to 10 parts-per-million by volume (ppm) for NO2and 2 ppm for NO.
New editions of this manual are complete revisions that reflect updates to the
instrument itself, as well as clarifications, additions and other modifications of the text.
Revision A ............................................................................................December 2013
Revision B ..............................................................................................February 2014
Revision C.......................................................................................................May 2015
Revision D, serial number 1021 and above ...................................................June 2016
TRADEMARKS & PATENTS
2B Technologies™, 2B Tech™, 2B™, NO2/NO/NOxMonitor™ and Model 405
nm™are trademarks of 2B Technologies, Inc.
CONFIDENTIALITY
The information contained in this manual may be confidential and proprietary, and is the
property of 2B Technologies, Inc. Information disclosed herein shall not be used to
manufacture, construct, or otherwise reproduce the goods disclosed herein. The
information disclosed herein shall not be disclosed to others or made public in any
manner without the expressed written consent of 2B Technologies, Inc.
© Copyright 2001-2016, 2B Technologies, Inc.
All rights reserved.

Model 405 nm NO2/NO/NOxMonitor Manual Rev. D
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WARRANTY STATEMENT
2B Technologies, Inc. warrants its products against defects in materials and
workmanship. 2B Technologies will, at its option, repair or replace products that prove
to be defective. The warranty set forth is exclusive and no other warranty, whether
written or oral, is expressed or implied. 2B Technologies specifically disclaims the
implied warranties of merchantability and fitness for a particular purpose.
Warranty Period
The warranty period is one (1) year from date of receipt by the purchaser, but in no event
more than thirteen (13) months from original invoice date from 2B Technologies, Inc.
Warranty Service
Warranty Service is provided to customers via web ticket, email and phone support,
Monday - Friday, from 9:00 a.m. to 5:00 p.m., Mountain Time USA. The preferred
method of contacting us is through our web ticketing software at:
www.twobtech.com/techsupport
This way all technical staff at 2B Tech will be alerted of your problem and be able to
respond. When you receive an email reply, please click on the Ticket link provided to
continue to communicate with us directly over the internet. The web ticket approach
to customer service allows us to better track your problem and be certain that you get
a timely response. We at 2B Tech pride ourselves on the excellent customer service
we provide.
You may also contact us by email at te[email protected] or by phone at
[phone]. In either case, a web ticket will be created, and future
communications with you will be through though that ticket.
Initial support involves trouble-shooting and determination of parts to be shipped from
2B Technologies to the customer in order to return the product to operation within
stated specifications. If such support is not efficient and effective, the product may be
returned to 2B Technologies for repair or replacement. Prior to returning the product,
a Repair Authorization Number (RA) must be obtained from the 2B Technologies
Service Department. We will provide you with a simple Repair Authorization Form to
fill out to return with the instrument.
Shipping
2B Technologies will pay freight charges for replacement or repaired products shipped
to the customer site. Customers shall pay freight charges for all products returning to
2B Technologies.

Model 405 nm NO2/NO/NOxMonitor Manual Rev. D
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Conditions
The foregoing warranty shall not apply to defects resulting from improper or
inadequate maintenance, adjustment, calibration or operation by the customer.
Maintenance, adjustment, calibration or operation must be performed in accordance
with instructions stated in this manual. Use of maintenance materials purchased from
suppliers other than 2B Technologies will void this warranty.
Limitation of Remedies and Liability
The remedies provided herein are the customer's sole and exclusive remedies. In no
event shall 2B Technologies be liable for direct, indirect, special, incidental or
consequential damages (including loss of profits) whether based on contract, tort or
any other legal theory. This manual is believed to be accurate at the time of
publication and no responsibility is taken for any errors that may be present. In no
event shall 2B Technologies be liable for incidental or consequential damages in
connection with or arising from the use of this manual and its accompanying related
materials. Warranty is valid only for the country designated on the 2B Technologies
quote or invoice.
Safety Warning
The Model 405 nm NO2/NO/NOxMonitor is designed to use an internal generator of
ozone (O3) to oxidize NO to NO2. Ozone is a toxic gas and should be handled with
caution. Under normal operating conditions, the instrument will produce ~6 ppm O3in
air. The instrument is equipped with an internal ozone scrubber to remove ozone
before venting the sample. Although the scrubber is catalytic, it does have a limited
lifetime and should be replaced at least every 12 months. For this reason, it is
recommended to properly vent the output of the instrument to protect against any
unscrubbed O3. The outlet should not be vented near the inlet of any NOxor ozone
monitor inlets to avoid false measurements.
The NIOSH exposure limit for ozone is 0.1 ppm or 100 ppb (8-hour time-weighted
average).

Model 405 nm NO2/NO/NOxMonitor Manual Rev. D
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WARNINGS
ENGLISH
WARNING:
Any operation requiring access to the inside of the equipment, could result
in injury. To avoid potentially dangerous shock, disconnect from power
supply before opening the equipment.
WARNING:
This symbol, on the instrument indicates that the user should refer to
the manual for operating instructions.
WARNING:
If this instrument is used in a manner not specified by 2B Technologies,
Inc. USA, the protection provided by the instrument may be impaired.
ESPAÑOL
ATENCION:
Cualquier operación que requiera acceso al interior del equipo, puede
causar una lesión. Para evitar peligros potenciales, desconectarlo de la
alimentación a red antes de abrir el equipo.
ATENCION:
Este símbolo, en el instrumento indica que el usuario debería
referirse al manual para instrucciones de funcionamiento.
ATENCION:
Si este instrumento se usa de una forma no especificada por 2B
Technologies, Inc., USA, puede desactivarse la protección suministrada
por el instrumento.
FRANÇAIS
ATTENTION:
Chaque opération à l’intérieur de l’appareil, peut causer du préjudice. Afin
d’éviter un shock qui pourrait être dangereux, disconnectez l’appareil du
réseau avant de l’ouvrir.
ATTENTION:
Le symbol, indique que l’utilisateur doit consulter le manuel
d’instructions.
ATTENTION:
Si l’instrument n’est pas utilisé suivant les instructions de 2B Technologies,
Inc., USA, les dispositions de sécurité de l’appareil ne sont plus valables.
DEUTSCH
WARNHINWEIS:
Vor dem Öffnen des Gerätes Netzstecker ziehen!
WARNHINWEIS:
Dieses, auf dem Gerät weist darauf hin, dab der Anwender zuerst
das entsprechende Kapitel in der Bedienungsanleitung lesen sollte.
WARNHINWEIS:
Wenn das Gerät nicht wie durch die Firma 2B Technologies, Inc., USA,
vorgeschrieben und im Handbuch beschrieben betrieben wird, können
die im Gerät eingebauten Schutzvorrichtungen beeinträchtigt werden.
ITALIANO
ATTENZIONE:
Qualsiasi intervento debba essere effettuato sullo strumento può essere
potenzialmente pericoloso a causa della corrente elettrica.
Il cavo di alimentazione deve essere staccato dallo strumento prima della
sua apertura.
ATTENZIONE:
Il simbolo, sullo strumento avverte l’utilizzatore di consultare il
Manuale di Istruzioni alla sezione specifica.
ATTENZIONE:
Se questo strumento viene utilizzato in maniera non conforme alle
specifiche di 2B Technologies, Inc. USA, le protezioni di cui esso è dotato
potrebbero essere alterate.
DUTCH
OPGELET:
Iedere handeling binnenin het toestel kan beschadiging veroorzaken.
Om iedere mogelijk gevaarlijke shock te vermijden moet de aansluiting
met het net verbroken worden, vóór het openen van het toestel.
OPGELET:
Het symbool, geeft aan dat de gebruiker de instructies in de
handleiding moet raadplegen.
OPGELET:
Indien het toestel niet gebruikt wordt volgens de richtlijnen van 2B
Technologies, Inc., USA gelden de veiligheidsvoorzieningen niet meer.
CHINESE
警告：
任何需要接触设备内部的操作均可能造成人身伤害。为避免可能的触电危险，请
在打开设备前切断电源。
警告：
这个符号 在仪器上表示用户应参考说明书上的操作指南。
警告 :
如果仪器没有按照美国2B科技公司指定方式操作，仪器的保护性能会减弱。
JAPANESE
警告：
機器の内部で操作する時、怪我できます。危険な衝撃を回避
するために、機器を開ける前に、電源を切断してください。
警告：
機器でこの記号 を見れば、マニュアルを読んでください。
警告：
この機器は2B テクノロジー会社、
USAの指定でしなければ、機器の保護が損なえます。

Model 405 nm NO2/NO/NOxMonitor Manual Rev. D
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1. NO2/NO/NOX MONITOR INTRODUCTION
The 2B Technologies Model 405 nm NO2/NO/NOxMonitor™is designed to enable
accurate measurements of atmospheric nitrogen dioxide (NO2), nitric oxide (NO) and
NOx(NO + NO2) over a dynamic range extending from a few parts per billion by
volume (referred to herein as simply ppb) up to 10 parts-per-million by volume (ppm)
for NO2and 2 ppm for NO based on the absorption of visible light at 405 nanometers
(nm).
The Model 405 nm provides an absolute method for measuring NO2based on the
Beer-Lambert Law and thus requires only infrequent calibration. The NO2
measurement is analogous to the measurement of O3using a conventional
absorbance-based ozone monitor; the two main differences are the use of 405 nm
light for NO2in place of 254 nm light for O3, and a much longer path length of ~2
meters (vs. 15-30 cm for ozone) to compensate for the much lower absorption cross
section of NO2. The long path length is achieved by use of a cell with a tubular design
that provides low volume and rapid gas exchange.
Nitric oxide is measured by measuring the light intensities with and without ozone
added to oxidize NO to NO2. As described in more detail below, the result is a “semi-
direct” measurement of NO in that the NO concentration is output directly and not
based on subtraction of NO2concentration from a total NOxconcentration. Instead,
the NOxconcentration is computed as the sum of the measurements of NO2and NO.
The NO2/NO/NOxMonitor is provided with a NIST-traceable calibration. Because
detection is based on the absolute method of absorbance, frequent calibration of the
span (sensitivity) is not required.

Model 405 nm NO2/NO/NOxMonitor Manual Rev. D
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1.1. Theory of Operation
Figure 1.1 is a simplified schematic diagram of the Model 405 nm NO2/NO/NOx
Monitor.
Figure 1.1. Schematic Diagram of the Model 405 nm NO2/NO/NOxMonitor.
Sample air is continuously drawn through the instrument by the Pump at a flow rate of
~1.5 L/min. The NO2Scrubber Valve alternately bypasses and sends the sample air
through a heated NO2scrubber to remove all NO2in the sample. The NO2-scrubbed
or unscrubbed air passes through the Reactor Volume and the DewLineTM Nafion
Tubes (to equilibrate humidity), through the Optical Cell and through the Cell Flow
Meter. Alternate switching of the NO2Scrubber Valve once every 5 seconds allows
the measurement of a light intensity in the absence (Io) of NO2and presence (I) of
NO2. The Beer-Lambert Law is then used to calculate the concentration of NO2from I
and Io:
󰇟󰇠 
 
Here, Lis the path length (~2.1 m) and σis the absorption cross section (~6.06 × 10-19
cm2molec-1) for NO2averaged over the light-emitting diode (LED) emission centered
on 405 nm. The measurement provides an absolute NO2concentration in
molecules/cm3. In order to convert this concentration to a mixing ratio (fraction of total
air molecules that are NO2), we also measure the cell temperature and pressure,
which determines the total concentration of air molecules. From the temperature and
pressure we use the ideal gas law to calculate the concentration of air molecules, M,
in the optical cell. Nitrogen dioxide in units of ppb is then given by: