Refrigeration Montitoring System

Zach Andrews - Eric Barr – Brandon White

ClientDr. Dan GuyerSteve Marquie

BackgroundThree Master-Bilt V39LX094XX commercial

walk-in refrigeration units Used to store research material for MSU

faculty, graduate, and undergraduate studiesNo way to remotely monitor if any

malfunction occursValuable research material lost in the past

due to compressor failure

Problem StatementNecessity to alert client of malfunctions and

constantly record internal environmental data

Objective is to research, design, and implement a system that does this

Project AssumptionsRemote accessAlertsData LogUser friendly

Research ObjectivesSystem must monitor temperature and relative humiditySystem must allow for real-time monitor, display, and alert

when system failsSystem 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

apartResearch best-priced and most highly functional alternatives

for monitoring unitsFormulate block diagram to compare all alternatives prior to

selection

Option 1Sensatronic'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’s Senturion Rack- Mount Environmental Monitor User friendly Rugged Multiple inputs Remote Alarms LCD Readout Web Based operation

Option 1 Cost

Item Price Quantity Total

Sensatronic Senturion Rack-Mount Environmental Monitor $949.00 1 $949.00

External Temp/RH Probe w/ 50ft. cable $185.90 3 $557.70

Power Presence Probe w/ 50ft. cable $139.70 1 $139.70

UPS Battery Backup (Available through Client) $0.00 1 $0.00

Automated Phone Dialer $218.90 1 $218.90

Magnetic Door Sensor w/50ft. cable $68.20 0 $0.00

Total $1865.30

Option 2Campbell 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 20 oC ±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

Option 2 Cost

Item Price Quantity Total

HMP45C Temp and RH Probes $600 3 $1800

CR1000 Data Logger (Available through Client) $0 1 $0

RTMCPRO Software $435 1 $435

PC (Available through client) $0 1 $0

Total $2235

Option 3Omega 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 25 oC ±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

Option 3 Cost

Item Price Quantity Total OM-CP-RHTEMP101 $199.00 3 $597.00 OM-CP-IFC110 $99.00 1 $99.00 PC (Available through client) $0 1 $0 Total $696.00

Option 4ACR Systems, Inc.

Logger/Sensor: ACR Smartreader 2 Air Temp Accuracy: ±.2oC Air Temp Resolution: 1 oC 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

Option 4 Cost

Item Price Quantity Total ACR Smartreader 2 logger $860.00 1 $860.00 Remote Temp/RH probes $239.00 2 $478.00 Trendreader 2 software $240.00 1 $240.00 PC (Available through client) $0 1 $0 Total $1578.00

Decision Matrix

Chart 5. Component option decision matrix (Scoring (1-5) 5=Best 1=Worst) 0=N/A

C

ambe

ll S

cien

tifi

c

Sen

satr

onic

s S

entu

rion

Om

ega

Inst

rum

ents

AR

C

Total 37

59

34

22

Cost 4 4 5 4

Email Alarms 5 5 5 0

Phone Alarms 3 5 4 0

Visual/Audible Alarms 0 5 0 0

Power Presence Alarm 0 5 0 0

Remote Web Access 4 5 0 0

Computer Interface 4 5 3 3

Battery Backup 5 5 5 5

Expandability 4 5 2 2

Warranty 4 5 2 3

Delivery 1 5 5 2 User Friendly 3 5 3 3

DecisionAfter careful consideration and evaluation of

our fouroptions, we concluded that the Sensatronics

Senturion 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.

SoftwareSoftware 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.

SoftwareSensatronics Web Interface

User Page

SoftwareSensatronics Web Interface

View Page

SoftwareSensatronics Web Interface

Data Log

SoftwareAlerting system

Individual probe high/low thresholds limits

Multiple alarm/response capabilities

User phone dialing availability

User remote access to acknowledge alerts from web.

SoftwareAlerting system

Alert Page

SoftwareAlerting system

Alert options

Additional RequirementsUPS power supply.

Budget of $3000

Chart 6. Installation Supply List

Item Quantity Price Total ¾” PVC conduit 42’ $0.94/10’ $3.95 ¾” PVC T connector 2 $2.97 $5.94 ¾” PVC LB connector 3 $2.98 $8.94 Silicone tube 1 $5.97 $5.97 1 ½” wood screws (logger mounting) 1 box of 25 $4.97 $4.97 1” self tapping metal screw 1 box of 50 $4.92 $4.92 Total $34.69

Item Price Quantity Total

Sensatronic Senturion Rack-Mount Environmental Monitor $949.00 1 $949.00

External Temp/RH Probe w/ 50ft. cable $185.90 3 $557.70

Power Presence Probe w/ 50ft. cable $139.70 1 $139.70

UPS Battery Backup (Available through Client) $0 1 $58.99

Automated Phone Dialer $218.90 1 $218.90

Magnetic Door Sensor w/50ft. cable $68.20 0 $0.00

Total $1865.30

Design and Implementation

Isometric Diagram

Construction Diagram

Conduit Construction

System Connections

Phone out

Ethernet In3 Probes Out

AD-2001 Phone Dialer

Senturion Monitor

Unit MountAssembled from 2”x 4” board

Shielding DeviceConsists 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.

Tools and Equipment

Power drill w/bitsHand sawTape measureScrewdriverSilicone gunLadder

PVC conduitLBs and T

connectorsPVC cementScrewsSiliconeZip ties

Vendor ListSensatronicsUnited Security Products, Inc.The Home DepotLowe’sHaslett Ace Hardware

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

User ManualContents:

Quickstart guide for whole system Set up in step by step fashion

Manuals from both Senturion and United Security Products

Basic system dynamics and connectionsDevelop troubleshooting methods and suggestionsVendor contact list

SummarySystem allows client to monitor all conditions

specifiedAlert functions as requiredCost was minimized while maintaining respect for

functionalityUser-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