2B Technologies 202 User manual

Model 202 Ozone Monitor Manual Rev. J-4
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Ozone Monitor
2BTechnologies
OPERATION MANUAL
Model 202
© Copyright 2001-2018, 2B Technologies
All rights reserved.
Technical Support:
https://twobtech.com/tech-support.html
[email protected]m
[phone]

Model 202 Ozone Monitor Manual Rev. J-4
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Contents
IDENTIFICATION RECORDS iv
PRINTING HISTORY v
WARRANTY STATEMENT vi
WARNINGS viii
1. OZONE MONITOR INTRODUCTION 1
1.1. Theory of Operation................................................................................................................. 1
1.2. Calibration Overview ............................................................................................................... 3
1.3. Use of DewLineto Remove Humidity Interference .............................................................. 3
2. MODEL 202 OZONE MONITOR SPECIFICATIONS 4
3. INSTALLATION AND OPERATION 6
3.1. Shipping Box Contents............................................................................................................ 6
3.2. Installation of the Ozone Monitor............................................................................................. 6
3.3. Measurement of the Zero Offset ............................................................................................. 7
3.4. Collecting Data from the Analog Output.................................................................................. 7
3.5. Collecting Data over the Serial Port in Real Time................................................................... 7
3.6. Data Averaging and Data Logging Using the Menu................................................................ 9
3.7. Menu Definitions and Menu Tree............................................................................................ 9
3.8. Selecting the Menu................................................................................................................ 10
3.9. To Log Data Using the Internal Data Logger ........................................................................ 11
3.10. To Stop Logging Data Using the Internal Data Logger ......................................................... 12
3.11. To Transmit Logged Data to a Computer Using the Serial Port............................................12
3.12. To Log Data Using the SD Card............................................................................................ 13
3.13. To Average Data ...................................................................................................................14
3.14. To Set the Calibration Parameters........................................................................................14
3.15. To Set the Time and Date .....................................................................................................16
3.16. To Change the Output Baud Rate......................................................................................... 16
3.17. To Turn the Analog Inputs On and Off and Change the Analog Output Scaling Factor.......16
3.18. To Turn the Display Light On and Off....................................................................................17
3.19. To Change the Units for Internal Temperature, Pressure, and Ozone.................................17
3.20. To Test the Lamp Voltage and Precision .............................................................................. 18
3.21. To Read the Number of Hours of Ozone Monitor Use..........................................................18
3.22. To Turn the Optional Lamp Heater On and Off.....................................................................18
3.23. To Read Flow Rate on the Display........................................................................................18
4. ACCESSING THE SERIAL MENU 19
5. MAINTENANCE 20
6. CALIBRATION 21
6.1. Introduction............................................................................................................................ 21
6.2. Ozone Standards...................................................................................................................21
6.3. Equipment Required.............................................................................................................. 21
6.4. Instrument Preparation.......................................................................................................... 22

Model 202 Ozone Monitor Manual Rev. J-4
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6.5. Calibration Setup Preparation ............................................................................................... 22
6.5.1. Setup Check.............................................................................................................23
6.5.2. Ozone Loss Test...................................................................................................... 23
6.5.3. Linearity Check.........................................................................................................23
6.5.4. Intercomparison Test ...............................................................................................24
6.6. Calibration Procedure............................................................................................................ 24
6.6.1. Instrument Preparation............................................................................................. 24
6.6.2. Measurement of Zero Air .........................................................................................24
6.6.3. Measurement of Ozone Standards.......................................................................... 24
6.6.4. Calibration Curve .....................................................................................................25
7. PERIODIC ZERO AND SPAN CHECKS 26
8. TROUBLESHOOTING 27
9. LABELED INSTRUMENT PHOTOS 30
10. PARTS LIST 35
11. SERVICE LOG 36
Appendix A: Using the 2B Technologies Display and Graphing Software 38

Model 202 Ozone Monitor Manual Rev. J-4
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IDENTIFICATION RECORDS
Record the following information for future reference:
Unit serial number: ______________________________________
Warranty start date: _______________________________________
(date of receipt)

Model 202 Ozone Monitor Manual Rev. J-4
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PRINTING HISTORY
This manual covers the Model 202 Ozone Monitor used for measurement of
atmospheric ozone over a wide dynamic range extending from a limit of detection of
3.0 parts-per-billion by volume (ppbv) to an upper limit of 250 parts-per-million (ppmv).
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 C.................................................................................................October 2005
Revision D............................................................................................September 2008
Revision E.................................................................................................October 2009
Revision F ............................................................................................September 2010
Revision G...............................................................................................February 2011
Revision H......................................................................................................April 2015
Revision I (serial number 1858-1899)....................................................November 2016
Revision J (serial number 1900 and above)..............................................January 2017
Revision J-2................................................................................................ April 2018
(Minor revision: Update Section 2 Specifications table to give GPS detail.)
Revision J-3.......................................................................................November 2018
(Minor revision: Update schematic in Section 1; update several links; other minor edits.)
Revision J-4.......................................................................................November 2018
(Minor revision: Add Section 3.23 and modify Section 3.7 to describe flow rate readout function;
other minor edits.)
TRADEMARKS & PATENTS
2B Technologies, 2B Tech, 2Band Ozone Monitorare trademarks of 2B
Technologies.
CONFIDENTIALITY
The information contained in this manual may be confidential and proprietary and is the
property of 2B Technologies. 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.
© Copyright 2B Technologies
All rights reserved.

Model 202 Ozone Monitor Manual Rev. J-4
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WARRANTY STATEMENT
2B Technologies 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.
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/tech-support.html
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 [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 202 Ozone Monitor Manual Rev. J-4
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Conditions
The foregoing warranty shall not apply to defects resulting from improper or
inadequate maintenance, adjustment, calibration or operation by customer.
Maintenance, adjustment, calibration or operation must be performed in accordance
with instructions stated in the Ozone Monitor manual. Usage 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. The Ozone Monitor 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 the Ozone Monitor manual and its
accompanying related materials. Warranty is valid only for the country designated on
the 2B Technologies quote or invoice.

Model 202 Ozone Monitor Manual Rev. J-4
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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,
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, 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,
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, 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, 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, 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 202 Ozone Monitor Manual Rev. J-4
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1. OZONE MONITOR INTRODUCTION
The 2B Technologies Ozone Monitor™is designed to enable accurate measurements
of atmospheric ozone over a wide dynamic range extending from a limit of detection of
3.0 parts-per-billion by volume (ppbv) to an upper limit of 250 parts-per-million (ppmv)
based on the well-established technique of absorption of ultraviolet light at 254 nm.
The Ozone Monitor™is light weight (5.5 lb, 2.5 kg) and has a low power consumption
(~7.2 watt) relative to conventional instruments and is therefore well suited for
applications such as:
•vertical profiling using balloons, kites, remotely piloted aircraft, and other aircraft
where space and weight are highly limited
•long-term monitoring at remote locations where power is highly limited
•urban arrays of ground-based detectors
•personal exposure monitoring for studies of health effects of air pollutants
1.1. Theory of Operation
Absorption of UV light has long been used for measurements of atmospheric ozone
with high precision and accuracy. The ozone molecule has an absorption maximum
at 254 nm, coincident with the principal emission wavelength of a low-pressure
mercury lamp. Fortunately, few molecules found at significant concentrations in the
atmosphere absorb at this wavelength. However, interferences, such as organic
compounds containing aromatic rings, can occur in highly polluted air. Mercury vapor
can be a significant interference inside buildings where mercury spills have occurred
in the past and in the vicinity of certain mining operations.
Figure 1-1 is a schematic diagram of the ozone monitor. Ozone is measured based
on the attenuation of light passing through a 15-cm long absorption cell fitted with
quartz windows. A low-pressure mercury lamp is located on one side of the
absorption cell, and a photodiode is located on the opposite side of the absorption
cell. The photodiode has a built-in interference filter centered on 254 nm, the principal
wavelength of light emitted by the mercury lamp. An air pump draws sample air into
the instrument at a flow rate of approximately 1 L/min. A solenoid valve switches so
as to alternately send this air directly into the absorption cell or through an ozone
scrubber and then into the absorption cell. The intensity of light at the photodiode is
measured in air that has passed through the ozone scrubber (Io) and air that has not
passed through the scrubber (I). Ozone concentration is calculated from the
measurements of Ioand Iaccording to the Beer-Lambert Law:






=I
I
l
Co
Oln
1
3

(1)

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where lis the path length (15 cm) and  is the absorption cross section for ozone at
254 nm (1.15 x 10-17 cm2molecule-1 or 308 atm-1 cm-1), which is known with an
accuracy of approximately 1%. The 2B Technologies instrument uses the same
absorption cross section (extinction coefficient) as used in other commercial
instruments.
The logarithm of equation 1 is calculated in the microprocessor of the instrument with
sufficient accuracy to provide five orders of dynamic range; ozone mixing ratios are
measured up to 250 ppmv. The shorter path length of the 2B Tech Model 202 Ozone
Monitor also contributes to the wide dynamic range, which is limited at the high end by
the absorption beginning to become optically thick (base 10 optical absorbance = 0.2).
The pressure and temperature within the absorption cell are measured so that the
ozone concentration can be expressed as a volume mixing ratio in ppbv, ppmv, or
pphmv. The mixing ratio can also be expressed as micrograms per cubic meter (µg
m-3) or milligrams by cubic meter (mg m-3). The instrument displays and records the
cell temperature and pressure in addition to the ozone mixing ratio. The cell pressure
is displayed and logged in units of either torr or mbar and the cell temperature in units
of either °C or K.
FIGURE 1-1. Schematic diagram of the ozone instrument.