The COM port is optional on the DC1100 and standard on the DC1700 battery operated Air Quality Monitor. Dylos monitors which are equipped with the COM. Aug 30, 2017 dylos conversion xlsx and umt cehsdylos pro 1100. Dylos corporation dc1100 pro air quality monitor manual. And larger on the left (which The Dylos DC 1700 user manual addresses data downloading. Citizen Science Operating Procedure. Ron Williams. User Manual: DC1100 Air Quality Monitor, 2012., Dylos Corporation, 2900 Adams Street, C37.
Personal Air Quality Monitoring Devices Data Research Submitted to Leslie Rhodes, Air Quality Director Mecklenburg County Air Quality By the Energy and Environmental Assistance Office Energy Production Infrastructure Center UNC Charlotte This report was prepared by: Matthew Pfender, Systems Engineering, UNC Charlotte Dadhichee Gujjar, Electical Engineering, UNC Charlotte In Collaboration With: Jeff Francis, Air Quality Program Manager Suzanne Hollenbeck, Sr. Air Monitoring Specialist Regina Guyer, P.E., Executive Director of the Energy and Environmental Assistance Office, UNC Charlotte Karyn Williamson - Coria, Ph.D., Recharge Unit and SEE Intern Specialist of the Energy and Environmental Assistance Office, UNC Charlotte ACKNOWLEDGMENTS The research described in this document was conducted by Sustainability, Energy, and Environmental (SEE) Interns: Matthew Pfender and Dadhichee Gujjar; within the Energy and Environmental Assistance Office at UNC Charlotte. Funding for this project from Mecklenburg County Land Use and Environmental Services Agency - Air Quality Division is gratefully acknowledged. 2 Executive Summary The Energy and Environmental Assistance Office (EEAO) has provided a report on Personal Air Quality Monitoring Devices Data Research Project. This research project is continuation of past years Personal Air Quality Monitoring Devices project that included evaluation of technology and investigation on availability, capabilities, pollutants being monitored, costs, implementation of usage, pros and cons, data availability, and reliability.
Two Sustainability, Energy, and Environmental (SEE) Interns: Matthew Pfender and Dadhichee Gujjar began working on this project in the fall of 2014 with the goal of implementing new devices selected from past to research, gather/analyze data, and to determine the reliability of new wearable and portable Air Quality Monitoring Sensors. The growing popularity of participatory research, crowd sourcing of data and the citizen science movement has fueled the interest in putting science back into the hands of all citizens with an interest in their environment. Through the research, students have noticed much excitement in the general public in this newfound ability to learn firsthand about their surrounding environment and to feel more knowledgeable and perhaps more in control of their personal health and lives. The project was completed by individual researcher’s investigations and discussions in conjunction with project planning and evaluation meetings. This enabled the students to develop a greater understanding of the scope of the work and its implications for air quality regulations. The results of this process yielded the realization of the trends and differences for these innovated technologies of personal air quality monitors and their impact within society. Data collected by Dylos DC 1700 particulate matter (PM) pollution sensor and Cairclip NO 2 & O3 pollution sensor located at Garinger High School (1100 Eastway Dr.
Charlotte NC 28205). Data collection for Dylos DC 1700 particulate matter sensor was initiated on October 28, 2014. Data collection for Cairclip NO2 & O3 was initiated on November 26, 2014. During the project, there were multiple occurrences of data loss due to freezing temperatures, which are detailed later in this report. 3 Table of Contents Executive Summary. 4 Introduction.
5 Device background – Dylos DC 1700. 5 Device background – Cairclip. 6 About the Pollutant (NO2 and O3). 7 Methodology.
8 Project Meetings Schedule. 9 Dylos and Cairclip Schedule.
10 Freezing Temperatures.10 Calculations in Methodology.10 Results. 11 Conclusion. 14 Recommendation. 14 Refference.
14 4 Introduction The Energy and Environmental Assistance Office (EEAO) was requested by Mecklenburg County Land Use and Environmental Services Agency – Air Quality Division (MCAQ) to provide a summary report on the current status of the project. Previously EEAO interns spent many hours researching different wearable devices that measured air quality. The evaluation of this technology included an investigation on availability, capabilities, pollutants being monitored, costs, implementation of usage, pros and cons, data availability, and reliability. It included research to determine what data was available from personal air quality monitoring devices currently being used and sought to understand how this information was already being implemented within our society throughout the world. After much research a decision was made to purchase a total of four devices. The devices that were purchased were two Dylos DC1700 and two Cairclips.
Device background – Dylos DC 1700 The Dylos DC1700 is a laser particle counter that measures particle concentration at micron level. According to the user manual, it measures small particles down to its detection limit of 0.5 microns. Examples of small particles include: fine dust, bacteria, mold, smoke, smog, etc.
Large particles are all particles detected above the large particle threshold, which is approximately 2.5 microns. Examples of large particles include: coarse dust, pollens, larger bacteria, plant spores, dust mite feces, etc. In order to determine the particles between 0.5 microns and 2.5 microns, the manual suggests, to subtract the large particle reading from the small particle reading. The values of data collected from the device are scaled by the device to represent the concentration of particles in approximately.01 cubic foot of sampled air. A simple conversion factor of multiplying the readings by 100 Figure 1 was used to determine the number of particles per cubic foot of air 1.
The device has two modes data collection: continuous mode and monitor mode. In continuous mode, the device takes 60 samples per minute; averages and stores the data (for that minute) while simultaneously commencing data sampling for the next minute.
In monitor mode, the device samples every hour for duration of 1 minute. Both modes of data collection were tried and tested.
The team found continuous mode to be providing a lot of data to be analyzed by the team and due to limited internal memory of the device, member of the team had to go to Garinger High School site more frequently. After much 5 discussion, the data collection mode was changed from continuous mode back to monitor mode.
The device has a 7.2V NiMH internal battery and can provide up to 6 hours of operation. At Garinger High School site, we used 120 V/ 60 Hz wall outlet to keep the device operational. The device has a large internal memory for the storage of particle data. The internal memory can store up to 10,000 individual readings, this translates to approximately a week of data when sampling continuously. In an event when the memory becomes full, the device simply overwrites the oldest samples in order to retain the most current data. A large LCD screen also allows the user to interface with the device in real time. The manufacturer for the device recommended operating the monitor above freezing.
Representatives asserted that there would be no harm to the device during freezing conditions and stated, “The accuracy would likely be acceptable once the monitor reaches equilibrium with the outside (sub-freezing) temperature; we have not tested it in this environment.” Device background – Cairclip The Cairclip is a very sophisticated sensor that measures NO 2 and O3. The device has two display modes“time” mode and “continuous measurement” mode.
The time mode is displayed until the first level of information is not reached 2. The continuous measurement mode is displayed by default, in which the gas concentration is displayed continuously by three digits on left and exposure time is displayed by two digits on the right side on the screen of the device. Figure 2 The device also has 2 information level alarms and 3 warning level alarms: Table 1 6 The device has a range of 0-250 ppb (0-240 analog) and has limit of detection of 20 ppb; Operating conditions: -20°C to 40°C; A Power supply of 200mA rechargeable battery via USB or can be plugged into a 100 V-240 V/5V 0.08A-1.0A with an adaptor. The device is extremely portable and can be attached to a belt, helmet clip or carried around the neck. Initially, it was developed to warn sensitive asthmatics of real-time pollution levels and alert the user to go inside. It continuously measures the individual’s exposure to the concerned pollutant, and records the data which can then be downloaded for analysis. About the Pollutant (NO2 and O3) Nitrogen Dioxide (NO2) is a molecule associating two atoms of oxygen and one of nitrogen.
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It’s a highly reactive oxidant and corrosive. This pollutant is characteristic of traffic emissions.
The emissions of NO2 result mainly from combustion (heating, electricity production, engines of motor vehicles and boats). It is the main agent responsible for the formation of the nitrates aerosols that represents an important proportion of the PM 2.5 and the ozone, in the presence of ultraviolet rays. Ozone (O3) is a gas composed of three oxygen atoms. It is not usually emitted directly into the air, but at ground-level and is created by a chemical reaction between oxides of nitrogen (NOx) and volatile organic compounds (VOC) in the presence of sunlight. Ozone has the same chemical structure whether it occurs miles above the earth or at ground-level and can be 'good' or 'bad,' depending on its location in the atmosphere. At ground-level ozone is considered as a pollutant.
The EPA Office of Air Quality Planning and Standards (OAQPS) has set National Ambient Air Quality Standards for Ozone in the United States: 75 ppb average 8 hours and 120 ppb average 1 hour. 3 The main sources of pollution are motor vehicle exhaust and industrial emissions, gasoline vapors, and chemical solvents, as well as natural sources emit NOx and VOC that help form ozone. Ground-level ozone is the primary constituent of smog. Sunlight and hot weather cause ground-level ozone to form in harmful concentrations in the air.
As a result, it is known as a summer time air pollutant. Many urban areas tend to have high ozone levels, but even rural areas are subject to increased ozone levels due to wind carrying the ozone and other pollutants hundreds of miles away from their original sources. Ozone can also be found indoors due to the increased use of printers, photocopiers or even some lighting. 7 Methodology The EEAO office received delivery of both sets of sensors at different times. The Dylos DC 1700 arrived in October, 2014 and the Cairclip arrived in November, 2014.
Before placing the sensors at the Garinger site the team took some time to get acquainted with the sensors. As wells as customize an aluminum housing box to hold the devices with help from Jeff Francis. It was recommended that the aluminum box be placed on top of the air quality station located at Garinger High School in order to maximize air sampling and to avoid interference from trees or buildings nearby. The aluminum housing and Dylos DC 1700 sensor were installed at the Garinger Site on October 28, 2014 and data collection for Particulate Matter (PM) was initiated. That particular week the team checked the unit twice to make sure it was running properly. The Dylos DC1700’s settings were set to monitor mode.
On November 25, 2014 the Cairclip was also placed in the same box. Figure 3 Figure 4 8 Table 2 Project Meetings Schedule Date September 16, 2014 Person(s) Regina, Karyn, Purpose Location Introduction to AQ Garinger High School (1100 Eastway Dr.
Personal Sensor Project Charlotte NC 28205) October 7, 2014 Dadhichee Jeff, Matt, Discussion: Devices, Mecklenburg County Office( 700 N Tryon St.