Refrigeration Montitoring System

1. Refrigeration Montitoring System Zach Andrews - Eric Barr – Brandon White

2. Client • Dr. Dan Guyer • Steve Marquie

3. Background • Three Master-Bilt V39LX094XX commercial walk-in refrigeration units • Used to store research material for MSU faculty, graduate, and undergraduate studies • No way to remotely monitor if any malfunction occurs • Valuable research material lost in the past due to compressor failure

4. Problem Statement • Necessity to alert client of malfunctions and constantly record internal environmental data • Objective is to research, design, and implement a system that does this

5. Project Assumptions • Remote access • Alerts • Data Log • User friendly

6. Research Objectives • System must monitor temperature and relative humidity • System must allow for real-time monitor, display, and alert when system fails • System must meet/exceed these design requirements • Temperature accuracy: Minimum +/- 0.5°F • Temperature resolution: Minimum +/- 1°F • Humidity accuracy: Minimum +/- 0.5% • Humidity resolution: Minimum +/- 1% • System must be able to log measurement data • Must be able to record data in time intervals as small as 1 minute apart • Research best-priced and most highly functional alternatives for monitoring units • Formulate block diagram to compare all alternatives prior to selection

7. Option 1 Sensatronic's Environmental Sensing • Sensors:Sensatronic’s Temperature and Relative Humidity Probe • Air Temp Accuracy: ±5oC • Air Temp Measurement range: -40o to +85o • RH Accuracy: ±2%RH • RH Measurement Range: 10% to 90% • Data Logger: Sensatronic’sSenturion Rack- Mount Environmental Monitor • User friendly • Rugged • Multiple inputs • Remote Alarms • LCD Readout • Web Based operation

8. Option 1 Cost

9. Option 2 Campbell Scientific • Sensor: Campbell Scientific HMP45C (Temp and RH Probe) • Rugged • Air Temp Accuracy: ±.5oC • Air Temp Measurement range: -39.2o to +60oC • RH Accuracy: at 20oC ±1%RH • RH Measurement Range: 0.8 to 100% • Data Logger: Campbell Scientific CR1000 • Rugged • Multiple inputs • Remote alarms • Available through client • RTMCPRO software: • Remote monitoring via internet server • Email alerts

10. Option 2 Cost

11. Option 3 Omega Engineering, Inc. • Logger/Sensor: Omega OM-CP-RHTEMP101 • Air Temp Accuracy: ±.5oC • Air Temp Resolution: .1oC • Air Temp Measurement range: -40 to +80oC • RH Accuracy: at 25oC ±2%RH • RH Resolusion: 0.5% RH • RH Measurement Range: 0 to 100% RH • Software: • Sends alarms through e-mails or numerically coded phone call • Syncs data from several logging inputs together • Icon in software allows easy exportation to Microsoft Excel spreadsheet

12. Option 3 Cost

13. Option 4 ACR Systems, Inc. • Logger/Sensor: ACR Smartreader 2 • Air Temp Accuracy: ±.2oC • Air Temp Resolution: 1oC • Air Temp Measurement range: -40 to +70oC • RH Accuracy: ±4%RH • RH Resolution: 0.4% RH • RH Measurement Range: 0 to 95% RH • Software: Trendreader 2 • USB interface • Capable of exporting to Excel

14. Option 4 Cost

15. Decision Matrix

16. Decision After careful consideration and evaluation of our four options, we concluded that the SensatronicsSenturion Environmental Rack Monitor was the best hardware choice for our needs, with a score of 59 out of 60 possible points in our decision matrix.

17. Software • Software needed to complete necessary task already included/installed with the Sensatronics unit. • Built-in web interface • Any firmware upgrades will be automatically uploaded to the unit over the net.

18. Software • Sensatronics Web Interface • User Page

19. Software • Sensatronics Web Interface • View Page

20. Software • Sensatronics Web Interface • Data Log

21. Software • Alerting system • Individual probe high/low thresholds limits • Multiple alarm/response capabilities • User phone dialing availability • User remote access to acknowledge alerts from web.

22. Software • Alerting system • Alert Page

23. Software • Alerting system • Alert options

24. Additional Requirements • UPS power supply.

25. Budget of $3000

26. Design and Implementation

27. Isometric Diagram

28. Construction Diagram

29. Conduit Construction

30. AD-2001 Phone Dialer Phone out 3 Probes Out Ethernet In Senturion Monitor System Connections

31. Unit Mount • Assembled from 2”x 4” board

32. Shielding Device • Consists of a set of three adapters that convert the conduit from ¾ “ to 2”. Then drilled holes at an angle to allow air to enter probe sensing environment from below but reduce effect from high airflow.

33. Tools and Equipment • Power drill w/bits • Hand saw • Tape measure • Screwdriver • Silicone gun • Ladder • PVC conduit • LBs and T connectors • PVC cement • Screws • Silicone • Zip ties

34. Vendor List • Sensatronics • United Security Products, Inc. • The Home Depot • Lowe’s • Haslett Ace Hardware

35. Installation Schedule • November 18: Built rack mount for unit • November 20: Tested and troubleshot Senturion monitor • November 22: Cut and pieced together conduit • December 5: Drilled holes in Units and glued together conduit; hooked up unit to probes • December 8: Secured conduit and wires with straps and screws • December, 9: Run phone line to annex for dialer • December 11-13: Program and test all devices to make everything reads and works properly • December 14-18: Make final system adjustments and complete

36. User Manual • Contents: • Quickstart guide for whole system • Set up in step by step fashion • Manuals from both Senturion and United Security Products • Basic system dynamics and connections • Develop troubleshooting methods and suggestions • Vendor contact list

37. Summary • System allows client to monitor all conditions specified • Alert functions as required • Cost was minimized while maintaining respect for functionality • User-friendliness was also highly considered • Construction was done appropriately to maintain integrity of structures involved with system design • Manual will allow users to change settings easily if needed