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Summary of Contents for 2B Technologies 405 nm
- Page 1 /NO/NO Monitor Technologies, Inc. OPERATION MANUAL Model 405 nm © Copyright 2016, 2B Technologies, Inc. All rights reserved. Technical Support: www.twobtech.com/techsupport techsupport@twobtech.com +1(303)273-0559 Model 405 nm NO /NO/NO Monitor Manual Rev. D...
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Page 2: Table Of Contents
4.16.2. and 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 REMOTE CONTROL VIA SERIAL CONNECTION Model 405 nm NO /NO/NO Monitor Manual Rev. D... - Page 3 Calibration Curve ...................... 27 PERIODIC ZERO AND SPAN CHECKS TROUBLESHOOTING 10. INSTRUMENT LAYOUT 11. WIRING CONNECTIONS 12. SPARE PARTS 13. SERVICE LOG Appendix A: Using the 2B Technologies Display and Graphing Software Model 405 nm NO /NO/NO Monitor Manual Rev. D...
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Page 4: Identification Records
IDENTIFICATION RECORDS Record the following information for future reference: Unit serial number: ______________________________________ Warranty start date: _______________________________________ (date of receipt) Model 405 nm NO /NO/NO Monitor Manual Rev. D... -
Page 5: Printing History
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. information disclosed herein shall not be disclosed to others or made public in any manner without the expressed written consent of 2B Technologies, Inc. -
Page 6: Warranty Statement
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. - Page 7 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.
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Page 8: Warnings
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 Inc. USA, the protection provided by the instrument may be impaired. -
Page 9: 2 /No/No Xmonitor Introduction
The NO measurement is analogous to the measurement of O using a conventional absorbance-based ozone monitor; the two main differences are the use of 405 nm light for NO in place of 254 nm light for O , and a much longer path length of ~2 meters (vs. -
Page 10: Theory Of Operation
1.1. Theory of Operation Figure 1.1 is a simplified schematic diagram of the Model 405 nm NO /NO/NO Monitor. Figure 1.1. Schematic Diagram of the Model 405 nm NO /NO/NO Monitor. Sample air is continuously drawn through the instrument by the Pump at a flow rate of ~1.5 L/min. - Page 11 NIST-traceable standards of NO and NO . These results are used to calibrate the Model 405 nm with respect to an offset and slope (gain or sensitivity). The corrections for offset and slope are recorded in the instrument Birth Certificate and on a calibration sticker that can be viewed by removing the top cover of the instrument.
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Page 12: Adaptive Filter
1.2. Adaptive Filter The Model 405 nm firmware processes sample concentration data through a built-in adaptive filter. During operation, the firmware may automatically switch between two different filter lengths based on the conditions at hand. During the measurement of stable concentrations, the firmware, by default, computes an average of the last 36 raw measurements, or 3 minutes of measurements. -
Page 13: No/No Xmonitor Specifications
Specifications above are for default parameters: Change Difference = 40 ppb, Change Percent = 10%, Short Filter = 4 pts (20 s), Long Filter = 36 pts (3 min). Adaptive filter parameters may be adjusted by the user. Model 405 nm NO /NO/NO Monitor Manual Rev. D... -
Page 14: Operation
2B Technologies immediately. 3.2. Pre-Operation Flow Settings of the Monitor The Model 405 nm has two independent flows, which need to be verified and adjusted before operating the instrument. The two volumetric flow rates measured and... -
Page 15: Operation Of The Monitor
LED source. The filter should be tested for NO and NO loss by measuring ambient NO and NO with and without the filter attached. Replacement filters are available through 2B Technologies. See our website: http://twobtech.com/parts- online.html. Model 405 nm NO /NO/NO Monitor Manual Rev. -
Page 16: Measurement Of The Zero Offset; Auto Zero Function
Note that the 9-pin cable provided is a “straight-through” female-female serial cable. A “cross-over” cable will not work. Start your data acquisition software, preferably using the 2B Technologies Display and Graphing Software (free download from http://twobtech.com/software.htm; see Appendix A for information on working with this software). - Page 17 (eh.g., due to a power failure) and when the averaging time is changed. Model 405 nm NO /NO/NO Monitor Manual Rev. D...
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Page 18: Data Averaging And Data Logging
During aircraft sampling, do not point inlet tube into User-defined the wind Use adaptive filter if rapidly changing NO/NO User-defined concentrations are occurring or are anticipated Model 405 nm NO /NO/NO Monitor Manual Rev. D... -
Page 19: The Menu
(). Note that “” always takes you up one level in the menu. A diagram of the menu structure and detailed explanations of each of the submenus are given below. Model 405 nm NO /NO/NO Monitor Manual Rev. D... -
Page 20: Menu Tree
4.1. Menu Tree The following diagram summarizes the complete menu. Main Menu NO2/NO Flow Vout O3_Flw Cell_Flw Model 405 nm NO /NO/NO Monitor Manual Rev. D... -
Page 21: To Start Logging Data
(in this case, “0” is displayed because no averaging has been selected). After 5 seconds, as an example, the display will be replaced by: NO2= 33.7 ppb ----------------------------- CF=1525 O3F=75 T=35.2 P=985.7 Model 405 nm NO /NO/NO Monitor Manual Rev. D... -
Page 22: To Stop Logging Data
Xmt function as often as you like. However, all stored data are lost once logging is started again using the Log function. Thus, you should always transmit your data to a computer before restarting logging. Model 405 nm NO /NO/NO Monitor Manual Rev. D... -
Page 23: To Transmit Logged Data
USB port by means of a serial-to-USB adapter. Such adapters are available in most computer stores or can be supplied by 2B Tech. Enable a data acquisition program on the computer such as the 2B Technologies Display and Graphing Software (free download available from http://twobtech.com/software.htm), ... -
Page 24: Instrument Configuration
NO , NO, Cell Flow Rate, Ozone Flow Rate, and internal Ozone Source. Calibrations are performed at 2B Technologies and these calibration parameters are set prior to the instrument being packaged and shipped. Flow rates and flow meter calibration parameters should not be changed unless certain parts of the instrument are replaced which are normally done by technicians at the factory. -
Page 25: To Set The No
Select switch to choose another numeral to change. Once the slope is correct, clicking on will set the slope to that value and return the display to the NO2 Cal Menu menu. Model 405 nm NO /NO/NO Monitor Manual Rev. D... -
Page 26: To Set The Flow Meter Slopes
Two different flow measurements are critical to the performance of the instrument: one is the cell flow rate and the other is the ozone flow rate. Do NOT change these settings unless you contact 2B Technologies. To change the flow meter slope... -
Page 27: To Change The Analog Output Scaling Factor
Rotating the Select switch will cycle the cursor between temperature (T) and pressure (P). Temperature units may be selected as either Kelvin (K) or Celsius (C) by first clicking to obtain the blinking cursor and then rotating the Select switch to obtain the Model 405 nm NO /NO/NO Monitor Manual Rev. D... -
Page 28: To Test The Led Voltage And Precision
To exit the LED test mode, hold in the Select switch until the screen is returned to the Cfg menu. 4.16. Measurement Modes The Model 405 nm has the capability to measure nitrogen dioxide and nitric oxide each individually or simultaneously (5 seconds apart). There are 3 measurement modes available: NO mode, NO mode, and NO and NO mode. -
Page 29: 2 Mode
(5 sec, 1 min, 5 min, or 1 hr). 4.17. Auto Zeroing The Model 405 nm is equipped with an Auto Zeroing valve to sample air drawn through a NO scrubber. The frequency and duration of the Auto Zeroing function can be set via the display or by entering the serial menu as described in Section 5. -
Page 30: Remote Control Via Serial Connection
Set the Zeroing frequency (minutes). Set the Zeroing duration (minutes). Set the time and date. n Leave time and date unchanged. Change time (must enter new values). d Change date (must enter new values). Model 405 nm NO /NO/NO Monitor Manual Rev. D... - Page 31 80 = Measuring NO and NO 10 = Measuring NO 20 = Measuring NO 81 = Measuring NO and NO Zero 11 = Measuring NO Zero 21 = Measuring NO Zero Model 405 nm NO /NO/NO Monitor Manual Rev. D...
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Page 32: Maintenance
For your convenience, a Service Log, which may be printed, is provided at the end of this manual for recording calibrations, replacement of pumps, LEDs, etc. Records of repairs made at 2B Tech are maintained in a database at 2B Technologies as well. That database also includes detailed information about the construction and initial calibration of your instrument, including digital of photos of its interior. -
Page 33: Calibration
Calibration is the process of adjusting the gain and offset of the Model 405 nm against some recognized standard. The reliability of the data collected from any analytical instrument depends on the accuracy of the calibration, which is largely dependent upon its analytical traceability to a reference material or reference instrument calibration. -
Page 34: Setup Check
Zero air can be generated either from compressed cylinders or from scrubbed ambient air. If ambient air is used, contaminants such as nitrogen dioxide and nitric oxide must be removed. The Model 405 nm will perform better if the zero air has humidity in the range 10-90 %RH. A set of DewLine Nafion tubing is included with the Model 405 nm for installation between a dry gas supply and the instrument. -
Page 35: Measurement Of Zero Air
1. Verify that the zero air supply is on and the calibrator is set to output zero air only. 2. Allow the Model 405 nm to sample zero air until the response is stable. 3. Record the average zero air responses. -
Page 36: Periodic Zero And Span Checks
To ensure the quality of the monitor data, periodic zero and span checks can be performed by following the steps below: 1. A zero check is performed by sampling zero air with the Model 405 nm following the “Measurement of Zero Air” Section 7.2.2 above. -
Page 37: Troubleshooting
Return Authorization number and a short form to be filled out and returned to our Service Department along with the instrument. The figures following Table 9.1 provide a “guided tour” of the Model 405 nm /NO/NO Monitor™... - Page 38 1 and 3. Wrong baud rate selected. Make sure that the baud rate chosen in the Model 405 nm menu matches the baud rate setting of your data acquisition program. Model 405 nm NO /NO/NO Monitor Manual Rev.
- Page 39 Reattach solenoid valve close to zero for NO properly connected to circuit cable to circuit board. concentrations. board. Internal NO scrubber is Contact 2B Technologies exhausted. about replacement of the internal NO scrubber. Model 405 nm NO /NO/NO Monitor Manual Rev. D...
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Page 40: Instrument Layout
Circuit Board Air Pump Dampener Assembly Board Cell DewLine Optical Power Assembly Flow Nafion Bench Board Meter Tubing Figure 10.1. Top view of Model 405 nmNO /NO/NO Monitor with cover removed. Model 405 nm NO /NO/NO Monitor Manual Rev. D... - Page 41 Inlet Scrubber Scrubbers Generator O3 Flow Reactor Exhaust Meter Solenoid Coil Solenoid Valves Scrubbers Valves Figure 10.2. Bottom view of NO /NO/NO Monitor with top cover removed and heater cover removed. Model 405 nm NO /NO/NO Monitor Manual Rev. D...
- Page 42 Reactor Analog Output Bypass Valve Valves Clock Battery 5-Volt Regulator Microprocessor Ozone Flow Meters Generator Photodiode Pressure Sensor Sample Photodiode Display Select Temperature Switch Sensors Figure 10.3. DBNOx Printed Circuit Board Model 405 nm NO /NO/NO Monitor Manual Rev. D...
- Page 43 Line In On/Off Switch Heater Power Out Control In Generator) Scrubber Heater Cell Pump Figure 10.4. Power Board Model 405 nm NO /NO/NO Monitor Manual Rev. D...
- Page 44 LED Power In Figure 10.5. LED Power Board Model 405 nm NO /NO/NO Monitor Manual Rev. D...
- Page 45 Serial Port Air Inlet, ¼-in Room Air Ozone Flow Cell Flow Inlet for O Rate Rate Use PTFE, PFA Generator Adjustment Adjustment or Other Inert Tubing Only Figure 10.6. Back of Instrument Model 405 nm NO /NO/NO Monitor Manual Rev. D...
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Page 46: Wiring Connections
Power Black/Black Line In Power Red/Black Power Out Power Red/Black Sample Pump Power Red/Blue Relay Control In (Heater) Power Blue/Black Heater Power White LED Driver Purple/White Power In LED Driver Purple/White Model 405 nm NO /NO/NO Monitor Manual Rev. D... -
Page 47: Spare Parts
The following list includes those parts of the Model 405 nm NO /NO/NO Monitor that are user serviceable. Please see the 2B Technologies website for a full and updated list of parts and pricing for the Model 405 nm: http://twobtech.com/parts-online.html Part Number... -
Page 48: Service Log
SERVICE LOG New NO Date Calibrated Cleaned Other Scrubber Pump Model 405 nm NO /NO/NO Monitor Manual Rev. D... - Page 49 New NO Date Calibrated Cleaned Other Scrubber Pump Model 405 nm NO /NO/NO Monitor Manual Rev. D...
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Page 50: Appendix A: Using The 2B Technologies Display And Graphing Software
.txt file and can optionally be saved to a .CSV file to be read in Excel. Saved data can be restored for later viewing and analyzing on the chart. By requesting an account with 2B Technologies, you can upload your data and view it on a Google Earth overlay. - Page 51 1. Make sure the application is connected to a device or you have opened a previously saved data file. 2. Click the Charts tab on the right side of the screen. Model 405 nm NO /NO/NO Monitor Manual Rev. D...
- Page 52 Click on the Save button. Opening Files 1. To open a file, click Open from the File menu. 2. Navigate to the folder where the file was stored. Model 405 nm NO /NO/NO Monitor Manual Rev. D...
- Page 53 If you are unsure, open the file in a text editor or Excel to determine which device. Serial Commands The menu commands are the same as given elsewhere in this manual. Model 405 nm NO /NO/NO Monitor Manual Rev. D...
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