class ii division 2 occupancy sensors

Class II Division 2 Occupancy Sensors

James FisherMichael Gazda

Russell GeeJoAnne HitchcockGledi Progonati

Christopher Zannoni

Presented on October 15, 2012 by:

ECE Senior Design 2012-2013

Team Members

• Chris Zannoni (ECE, CompE)

• Gledi Progonati (ECE)

• JoAnne Hitchcock (ECE)

• Russell Gee (Eng Phys)

• James Fisher (ME)

• Michael Gazda (ME)

• Dr. George Lykotrafitis (ME)

• Dr. Sung Yeul Park (ECE)

• Sponsered By Sensor Switch

Advisors


Agenda1. Occupancy Sensor Technology

2. Hazardous Environment Classification

3. Design Considerations

4. Budget

5. Timeline


What are Occupancy Sensors?


Occupancy Sensor Technology• PIR-Passive Infrared

• Cannot "see" through materials, including glass

• Multiple individual beams look at the area • Two (or more) consecutive beams detect a

difference in temperature

• Signal sent to indicate occupancy

• Microphonics• Microphones pick up sound to indicate

continued occupancy without movement


Occupancy Sensor Technology

Relay andPower Supply for Sensor

Sensor

Luminaire

Line Voltage

Sensor Power(Low Voltage<200 mW)

Control Signal

Manual Switch


Why use Occupancy Sensors?

Energy Savings Electricity Bill Savings Convenience


Hazardous EnvironmentsI II

1 Gas frequently present

Dust frequently present

2 Gas present abnormally

Dust present abnormally

ClassDiv


Groups of Hazardous DustsGroup E: Metal dusts (conductive, and explosive) (resistivity <100 kΩ/cm)

Aluminum Calcium Silicide Titanium


Groups of Hazardous Dusts Group F: Carbon dusts (some are conductive, and all are explosive) (100 kΩ/cm <

resistivity <100 MΩ/cm)

Carbon Black Charcoal (Activated) Asphalt


Groups of Hazardous DustsGroup G: Flour, starch, grain, combustible plastic or chemical dust (explosive)

(resistivity >100 kΩ/cm)

Flour Grain (Dust Cloud) Cinnamon


•Intrinsic Safety limits energy in device, removing possibility of ignition•Cheap•Lower installation cost•Universally accepted

•What makes a circuit intrinsically safe?

Design Restrictions: Inherent Safety


Intrinsic Safety•Composed of Simple apparatues

•Passive components that store no, or little energy• Ignition curves

•Temperature limitations•Energy limiting barrier (Zener Barrier)


Ignition Curves for Resistive Circuits


Ignition Curves for Capacitive Circuits


Ignition Curves for Inductive Circuits


Temperature Regulations


Electrical Barriers

Relay andPower Supply for Sensor

Sensor

Luminaire

Line Voltage

Manual Switch

Zener diode barrier


o Dust ignition proof:o OSHA (Occupational Safety & Health Administration) standard

“The apparatus is enclosed in a manner that will exclude ignitable amounts of dusts and will not permit arcs, sparks or heat generated or liberated inside the enclosures to cause ignition of exterior dust accumulations on the enclosure or of atmospheric dust suspensions in the vicinity of the enclosure.” -(National Electric Code)

Enclosure Considerations


20

o Enclosure material must meet certain requirements:• Corrosion Resistance• Wireless communication restriction due to

transmissibility of metals • Raceways/conduit must be made of metal or PVC and

must be sealed• Wires must be supported to eliminate tension in wire• Low heat transfer, thermal conductivity

• Crucial to prevent combustion• Dust layers/clouds can ignite due to heat transfer

from components enclosed in the box



• List of Class II, Division 2 dusts with the lowest ignition temperatures

21

Class II Div. 2 Combustible Dusts Group Min. Ignition Temp.

(°C)

Sevin G 140

Ferbam G 150

Violet 200 Dye G 175

Soy Flour G 190

Sulfur G 220



Cost Considerations

o Cost (< $430-$1200 based on money saved in 3 years)• Cheapest material that meets requirements• Material with lowest production cost

• Injection mold plastics • Low installation cost

• Enclosure design should limit installation time • Reduce installation cost• Reduce overall cost of final product

• Low component cost


Budget

• 3D printing

• Barriers (Phy,Elec.)

• Relays

• Communication Modules

• Connectors/Receptacles

• Production PCB's

• Testing ? (Could be large amount)

• Documentation (Manuals, Codes)

$9-11k for M.E. $1k for ECE

Barriers, $30

3D Printing; $75

Code Books; $170

PCB Printing; $75

Connectors, $10

Wireless Modules, $20 Relays, $2


Timeline


Please visit our website to follow the project and for more info(link on main ECE senior design page, Team 166)

Questions?


References"Alma Aquaculture Research Station | University of Guelph." Alma Aquaculture Research Station | University of Guelph. University of Guelph,

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"Avoiding and Overcoming Installation Problems With Occupancy-Sensing Lighting Control Systems." Rensselaer Polytechnic Institute, 2 Dec. 2002. Web. 10 Oct. 2012. <http://www.lrc.rpi.edu/researchAreas/reducingBarriers/pdf/occupancySensorElecGuide.pdf>.

Bower, Lisa. "Baking with Different Types of Flour." Life123. N.p., 2012. Web. 11 Oct. 2012. <http://www.life123.com/food/baking/baking-tips/a-quick-guide-to-using-different-types-of-flour.shtml>.

"Carbon Black (N220, N660, N550)." Made-in-China.com. N.p., 2012. Web. 11 Oct. 2012. <http://www.made-in-china.com/showroom/x987456321/product-detailAqUELcrOXjWe/China-Carbon-Black-N220-N660-N550-.html>.

"Cinnamon Spice." Cinnamon-spice Has Very Unique Healing Abilities You Want to Be Aware Of! Natures Health Foods, n.d. Web. 11 Oct. 2012. <http://www.natures-health-foods.com/cinnamon-spice.html>.

"Ebay Targets India Growth." HSBC Global Connections, 2012. Web. 11 Oct. 2012. <http://globalconnections.hsbc.com/united-kingdom/en/news-insight/ebay-targets-india-growth>.

"Energy Efficiency | Outside the Box Construcion." Outside the Box Construction, 2010. Web. 13 Oct. 2012. <http://www.outsidetheboxconstruction.com/energyefficiency.html>.

"Exposure to Mold and Dust in Grain." Iowa State University Extension and Outreach. Iowa State University, 2012. Web. 11 Oct. 2012. <http://www.extension.iastate.edu/obrien/news/exposure-mold-and-dust-grain>.

"Ferro Alloys Product." Metal Alloys (India). N.p., n.d. Web. 11 Oct. 2012. <http://www.indiamart.com/metalalloys/ferro-alloys-product.html>.

"Hazardous (Classified) Locations." Hazardous (Classified) Locations. OSHA, May 1996. Web. 10 Oct. 2012. <http://www.osha.gov/doc/outreachtraining/htmlfiles/hazloc.html>.

"Houston Blogs: TheVote." : The Money Trail #GOP2012: Updated. ABC13, 15 Oct. 2011. Web. 13 Oct. 2012. <http://thevote.abc13.com/2011/10/the-money-trail-gop2012.html>.


References"Intrinsic Safety "i" Type of Protection." Siemens, 2012. Web. 12 Oct. 2012. <https://moodle.dce.fel.cvut.cz/file.php/17/Manualy/expb1_e.pdf>.

"Light Guide: Occupant Sensors." Light Guide: Occupant Sensors. Inter.Light, 2012. Web. 10 Oct. 2012. <http://www.lightsearch.com/resources/lightguides/sensors.html>.

Lilly, Paul. "Amped Wireless AP20000G Wireless Router Promises Up to 7,500 Square Feet of Coverage." Maximum PC. N.p., 18 Sept. 2012. Web. 13 Oct. 2012. <http://www.maximumpc.com/tags/wifi>.

"Lutron MS-OPS2-WH Maestro 250 Watt Single Pole Occupancy Sensor Switch, White.“ Amazon, 2012. Web. 13 Oct. 2012. <http://www.amazon.com/Lutron-MS-OPS2-WH-Maestro-Single-Occupancy/dp/B005WM3ALC>.

"Maximize Your Energy Savings with a Quality Furnace." American Weathermakers, n.d. Web. 13 Oct. 2012. <http://www.americanweathermakers.com/2012/08/maximize-your-energy-savings-with-a-quality-furnace/>.

"Precious Metals: Titanium Jewelry." Precious Metals: Titanium Jewelry. All About Gemstones, 2012. Web. 11 Oct. 2012. <http://www.allaboutgemstones.com/metal_jewelry_titanium.html>.

"Sensor Switch." Sensor Switch. Acuity Brands, 2012. Web. 12 Oct. 2012. <http://www.sensorswitch.com/companyoverview.aspx>.

Stahl, R. "Innovative Global Explosion Protection." Automation Catalog 8000. R Stahl, 2012. Web. 26 Sept. 2012.

"What You Should Know about Coal Tar Sealant." Springfield News-Leader. Gannett, 6 Feb. 2010. Web. 11 Oct. 2012. <http://www.news-leader.com/article/20100207/NEWS01/2070371/What-you-should-know-about-coal-tar-sealant>.


class ii division 2 occupancy sensors

Documents

movement ece senior

design restrictions

occupancy sensors class

dust ignition proof

continued occupancy

sensor advdisadv

team memberschris zannoni

motion sensors