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2B Technologies Ozone Calibration Source 306 Operation Manual

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Ozone Calibration Source
2B
Technologies
OPERATION MANUAL
Model 306
© Copyright 2020, 2B Technologies
All rights reserved.
Technical Support:
https://twobtech.com/tech-support.html
techsupport@twobtech.com
+1(303)273-0559
Model 306 Ozone Calibration Source Manual Rev. G-1
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  • Page 1 Ozone Calibration Source Technologies OPERATION MANUAL Model 306 © Copyright 2020, 2B Technologies All rights reserved. Technical Support: https://twobtech.com/tech-support.html techsupport@twobtech.com +1(303)273-0559 Model 306 Ozone Calibration Source Manual Rev. G-1...

  • Page 2: Table Of Contents

    Contents IDENTIFICATION RECORDS PRINTING HISTORY WARRANTY STATEMENT SAFETY WARNINGS INTRODUCTION Theory of Operation ......................... 1 Summary of Schematic Diagram ..................... 3 SPECIFICATIONS: MODEL 306 OZONE CALIBRATION SOURCE STARTUP OPERATION Shipping Box Contents ......................5 Startup of the Ozone Calibration Source™ ................5 Model 306 Installation Guidelines ...................
  • Page 3 MAINTENANCE/TROUBLESHOOTING 10. LABELED INSTRUMENT PHOTOS 11. PARTS LIST 12. SERVICE LOG Model 306 Ozone Calibration Source Manual Rev. G-1...

  • Page 4: Identification Records

    IDENTIFICATION RECORDS Record the following information for future reference: Unit serial number: Warranty start date: (date of receipt) Model 306 Ozone Calibration Source Manual Rev. G-1...

  • Page 5: Printing History

    468 (replacement of Nylon tee with Kynar tee and Nylon bulkhead with SS bulkhead) and other changes.] TRADEMARKS & PATENTS 2B Technologies™, 2B Tech™, 2B, Ozone Calibration Source™, and Ozone Cal Source™ are trademarks of 2B Technologies. CONFIDENTIALITY The information contained in this manual may be confidential and proprietary and is the property of 2B Technologies.

  • Page 6: Warranty Statement

    WARRANTY STATEMENT 2B Technologies warrants its products against defects in materials and workmanship. 2B Technologies will, at its option, repair or replace products which prove to be defective. The warranty set forth is exclusive and no other warranty, whether written or oral, is expressed or implied.

  • Page 7: Safety Warnings

    Ozone Calibration Source™ manual and its accompanying related materials. Warranty is valid only for the country designated on the 2B Technologies quote or invoice. SAFETY WARNINGS The Model 306 Ozone Calibration Source is designed specifically to produce ozone.
  • Page 8 WARNING: ATENCION: If this instrument is used in a manner not specified by 2B Technologies, Si este instrumento se usa de una forma no especificada por 2B USA, the protection provided by the instrument may be impaired.

  • Page 9: Introduction

    INTRODUCTION The Model 306 Ozone Calibration Source™ (OCS™) is a portable source of ozone that allows one to calibrate any ozone monitor, or to supply a calibrated source of ozone for experiments such as exposure studies. It has been described in a peer- reviewed publication in the journal Atmospheric Measurement Techniques (11, 4797- 4807, 2018;...
  • Page 10 absorbed by O to produce oxygen atoms. The oxygen atoms attach to O to form ozone, O . The well-known mechanism, which is responsible for the presence of Earth’s protective ozone layer, is as follows: + h → O + O + M →...

  • Page 11: Summary Of Schematic Diagram

    Summary of Schematic Diagram An air pump pushes air through a particle filter, then through a mass flow meter. The microprocessor controls the flow rate at a value of 4.0 L/min volumetric by means of pulse-width modulation of the power to the pump. Before entering the photolysis chamber, the air passes through an ozone/NO scrubber to remove any ambient ozone and NO...

  • Page 12: Specifications: Model 306 Ozone Calibration Source

    SPECIFICATIONS: MODEL 306 OZONE CALIBRATION SOURCE Method of Ozone Production UV photolysis of molecular oxygen (O ) at 185 nm Ozone Concentration Range 0 ppbv and 30 ppbv to 1,000 ppbv Output Flow Rate 4.0 L/min volumetric Precision and Accuracy Greater of 2.0 ppbv or 2.0% of ozone concentration Response Time for Change in <...

  • Page 13: Startup Operation

    STARTUP OPERATION Please read all the following information before attempting to install the Ozone Calibration Source™. For assistance, please call 2B Technologies at (303)273-0559 or email us at techsupport@twobtech.com. NOTE: Save the shipping carton and packing materials that came with the Ozone Calibration Source™.
  • Page 14 Press in and hold the black Select switch on the front of the instrument to bring up the LCD Menu. See the next section for a description of how to operate the instrument using this menu. Select Switch The user’s ozone monitor, or other experimental system, can be attached to the Model 306 OCS to receive air containing calibrated amounts of ozone.

  • Page 15: Model 306 Installation Guidelines

    Model 306 Installation Guidelines 3.3.1 Typical Installation: Connection to a Device Drawing Flow from the Model The Model 306 is often used to calibrate an ozone monitor or to provide a known ozone concentration to another kind of equipment that draws flow from the calibrator. The Model 306 is designed for this type of installation.
  • Page 16 Place to install a needle Internal valve for increasing the Overflow outlet flow or pressure Scrubber Outlet Ozone Generator Figure 3-2. Photograph of the Model 306 showing where a needle valve can be installed to increase the flow or pressure at the outlet. Model 306 Ozone Calibration Source Manual Rev.

  • Page 17: Operation Via The Lcd Menu

    OPERATION VIA THE LCD MENU Menu Overview Any time after powering the instrument on, you may enter the main menu by holding in the rotary select switch until the menu appears. Once the menu appears, release the select switch. (Note: You may enter the menu without waiting for the warm up to be complete;...

  • Page 18: Configuration Menu (Cfg)

    Configuration Menu (Cfg) Selecting the Cfg submenu will produce the following display: Cfg Menu  where Cal is a submenu for entering the calibration menu; Prg is a submenu for defining a programmed series of step ozone concentrations; Sch is a submenu that allows the user to set the Model 306 to run an ozone step function once per day at a chosen time;...

  • Page 19: Program Submenu

    Both of the offset values, Z_L and Z_H, are in units of ppb. The Ozone Cal Source is shipped with a NIST-traceable calibration. The calibration factors, Z_L, S_L, Z_H, and S_H are set in the instrument and recorded in the instrument’s calibration document and birth certificate.

  • Page 20: Scheduler Submenu

    This process is repeated until the target concentrations are set for all of the steps in your program. These steps may span the full range of the instrument, from 0 to 1000 ppbv, if desired. This program resides in memory until the next time you choose to change it. 4.2.3 Scheduler Submenu Choosing the Sch submenu from the Cfg menu, allows one to schedule a once-daily execution of the step program defined in Section 4.2.2.

  • Page 21: Start Step Menu (Stp)

    ozone from the stainless steel outlet on the back of the instrument (Figure 10-1 or 10- 2) until you enter menu again and change the target concentration. As an example, the display will read as follows Target= 200 ppb delT=-0.1 ▌▌▌▌▌▌ if you have chosen 200 ppb as the target concentration.

  • Page 22: Using The Serial Interface

    USING THE SERIAL INTERFACE Collecting Diagnostic Data over the Serial Port in Real Time via the LCD Collecting serial data for a few minutes can be extremely useful in diagnosing a problem with the Ozone Calibration Source™. To transmit diagnostic data to a computer over the serial port in real time, connect the Ozone Calibration Source™...

  • Page 23: Operating The Instrument Remotely Via The Serial Menu

    To stop data collection, press and hold in the Select switch on the Model 306 (alternatively, type n from the terminal emulator; see Section 5.2 below). If you have a problem with your instrument, please collect a data file and email it to 2B Technologies at techsupport@twobtech.com along with a description of the problem.

  • Page 24: Hibernate Feature

    As noted in the table above, the instrument must be put in hibernate mode (or power cycled) after changing the scheduler hour with the set hr command. Otherwise, the step program will not execute at the new scheduled hour. If you are acquiring serial data, you can end the data collection from either the LCD menu of the Model 306 (by pressing in the Select switch) or from the keyboard of your computer (using the n command).

  • Page 25: Using The Voltage Output (Vout)

    USING THE VOLTAGE OUTPUT (Vout) Using the Voltage Output to Measure Ozone Output Concentration Using the BNC connector on the back of the Model 306, the user can monitor a voltage signal that is proportionally scaled to the ozone output setting. When set to output zero ozone, the voltage output will be 0.05 Volts.

  • Page 26: Using The Model 306 To Calibrate An Ozone Monitor

    USING THE MODEL 306 TO CALIBRATE AN OZONE MONITOR Flow Requirement The flow requirement of your ozone monitor must be less than the output capacity of the Model 306 Ozone Cal Source™, which is about 4 L/min. Attaching the Ozone Cal Source™ to an Ozone Monitor 7.2.1 Overview For calibration of an ozone monitor, tubing may be attached from the ¼-inch stainless steel Swagelok outlet fitting on the back of the Model 306 Ozone Cal Source™, to the...

  • Page 27: Running A Calibration Of An Ozone Monitor

    Running a Calibration of an Ozone Monitor Once the connections are established between the Model 306 outlet and the inlet of your ozone monitor, the calibration may be performed. The ozone output of the Model 306 may be changed manually from the LCD O3 menu or from the serial menu. Alternatively, the Model 306 can run a preprogrammed step calibration using a user- prescribed series of up to 10 different ozone output steps, executed either in the LCD menu (Stp menu) or in the serial menu (run step command).

  • Page 28: Calibrating The Model 306 Ozone Calibration Source

    CALIBRATING THE MODEL 306 OZONE CALIBRATION SOURCE The absorption of 185-nm light by oxygen is very weak (  2 × 10 /molec). As a result, the absorbance within the photolysis chamber is optically thin, meaning that only a very small fraction of the emitted light is absorbed by oxygen to produce ozone. Thus, for a constant flow residence time within the photolysis chamber (constant flow rate), we expect the concentration of ozone produced to be linear with lamp intensity.
  • Page 29 MAINTENANCE/TROUBLESHOOTING The Ozone Calibration Source is designed to be nearly maintenance free. The only components that require routine maintenance are the two particle filters and the two scrubbers (the ozone/NOx scrubber and the ozone scrubber; see Figure 10-1), which should be changed at least annually, or more often under heavy use of the instrument. Other user-serviceable components include the lamp, air pump, and 3-way solenoid valve, all of which are easily replaced should they fail.
  • Page 30 Target temperature is Absent or loose connection Remove top cover and never reached. of temperature probe cable reattach connector to to circuit board. circuit board. Heater is burned out. Replace cartridge heater. Instrument does not Photolysis lamp is burned Replace lamp and output ozone.
  • Page 31 LABELED INSTRUMENT PHOTOS Air Pump Ambient Sample Air Inlet Overflow Outlet: Outlet Calibration Ozone Air or Scrubber Sample Air 3-Way Valve Lamp Inverter Ozone/NOx Scrubber Particle Detector Filters Lamp Photolysis Cell  FIGURE 10-1: Bottom view of Ozone Cal Source with cover removed.
  • Page 32 Serial Number Sticker Printed Flow Meter Circuit Board  FIGURE 10-2: Top view of Ozone Cal Source with cover removed Model 306 Ozone Calibration Source Manual Rev. G-1...
  • Page 33 Lamp Pump Heater 12-V Power Serial Port Analog Voltage Output 3-Way Valve 5-V Regulator Clock Battery Flow Meter Microprocessor Pressure Sensor Programming Switches Select Switch Temperature Photodiode Power Switch FIGURE 10-3: Printed Circuit Board Model 306 Ozone Calibration Source Manual Rev. G-1...
  • Page 34 Outlet: Calibration Air Ambient Air Ambient Sampling Inlet Sample Air RS232 Analog Voltage Power Serial Port Output  FIGURE 10-4: Back panel of Ozone Cal Source Model 306 Ozone Calibration Source Manual Rev. G-1...
  • Page 35 PARTS LIST The following list includes those parts of the Model 306 Ozone Calibration Source that are user serviceable. Please see the 2B Technologies website for a full and updated list of parts and pricing: https://twobtech.com/parts-online.html Part Number Description OZPUMP306...
  • Page 36 SERVICE LOG Technologies Model 306 Ozone Calibration Source Purchase Date: ______________ Serial No.______________ Date Calibrated Cleaned Pump Other Outlet Lamp Scrubber Model 306 Ozone Calibration Source Manual Rev. G-1...
  • Page 37 Date Calibrated Cleaned Pump Other Outlet Lamp Scrubber Model 306 Ozone Calibration Source Manual Rev. G-1...

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