Finding That Elusive Pot of Goldor

Networking Your Shelter

Rebecca Peltzer & Jennifer Bradley, Polk County – Air Quality

Steve Drevik, Agilaire

Typical Shelter Hardware ComponentsTypical Shelter Hardware ComponentsTypical Shelter Hardware ComponentsTypical Shelter Hardware Components

• Data Acquisition Front End• Data Logger or PC

• Internet Access Device• Wireless IP Modem• DSL / Cable Modem• Satellite

• Router• May be built into Internet

Device

• Analyzers and Samplers • New analyzers are

Ethernet-capable• Most are still serial, but

terminal servers can be used to connect them to a network or a logger

Software ComponentsSoftware ComponentsSoftware ComponentsSoftware Components

• Data Acquisition Software• Connections within the shelter

• Logger to analyzer• External from the main DAS

server• Central DAS to logger• Central DAS to analyzer

• Diagnostic / Remote Control Software

• Any client PC to analyzer

• Specialty Software• Download sampler data

Note that in a networked environment, the location isn’t important to the software

But how do we make the most of all of these options and components?

Our Architecture – A work in progressOur Architecture – A work in progressOur Architecture – A work in progressOur Architecture – A work in progress

• Our Analyzers:2 Model 8832 data loggers2 collocated 49i Ozone1 43i-TLE SO21 48i-TLE CO142i NOx2 collocated PM2.5 BAM-1020 Meterological Station: Wind Speed, Wind Direction, Relative Humidity, Ambient Temperature

• Site is polled over private LAN connection inside the firewall.

• All analyzer connections were retained as analog

• Our analog data system- E-Das Ambient through Agilaire• Problems:

• Limited digital capabilities• 1 ug/m3 error in BAM data• Data limitations

- Teom-only 3 analog outputs

- No metadata

• Thermo i-Series analyzers with ethernet capabilities

• Easy Transition to AirVision• Same hardware• Just a software upgrade

Our Shelter NetworkOur Shelter NetworkOur Shelter NetworkOur Shelter Network

Introduction to Ethernet/ModbusIntroduction to Ethernet/ModbusIntroduction to Ethernet/ModbusIntroduction to Ethernet/Modbus

• Modbus over Ethernet was the ideal choice for the digital communications:• Transmission is error checked• Standardized protocol• Much faster than RS-232 • Easier to troubleshoot with

diagnostic tools built into the 8832 data logger

• Modbus only requires that the data logger knows the following:• Analyzer IP

• we set• Analyzer port

• defined by manufacturer• Register # in analyzer

• from analyzer manual• What destination

channel/parameter in the 8832 / AirVision

• we choose

Digital Programming Digital Programming Digital Programming Digital Programming

• AirVision simplifies the configuration process:

MODBUS• select the analyzer brand and

register you want, and the Modbus control file is automatically downloaded.

Direct Instrument Polling• AirVision can directly download

data• BAM-1020• Teoms

• 3-steps Process:• Open up a connection to

instrument• Send commands to retrieve

data in native format• Run File Import Tool to

import into database

MetadataMetadataMetadataMetadata

• Gives us remote trouble-shooting capability• Collect continuous diagnostic

values• Or on demand only when

there are problems

• Thermo i-series - diagnostic data• Flows• Internal temperatures• Intensity

• BAM-1020• Relative humidity• Average hourly volume• Ambient temperature

BAM-1020: Analog Data IssuesBAM-1020: Analog Data IssuesBAM-1020: Analog Data IssuesBAM-1020: Analog Data Issues

• Difficult data collection to ensure data is reported in the same hour it’s collected:• Standard Average Channel• Average Math Channel• Digitally Timed Event • Contact Closure-clock sync

program

• 1ug/m3 error in analog data

• Manual download of BAM internal data

• Data editing – lengthy process• Adjusting data collected by

data logger to match BAM internal data

HOUR BAM_AVG(ug/m3)

PM25LC(ug/m3)

00:00 24 23

01:00 24 24

02:00 24 24

03:00 24 24

04:00 18 17

05:00 25 25

06:00 24 24

07:00 32 32

08:00 36 35

09:00 41 40

10:00 38 38

11:00 37 37

12:00 30 30

13:00 33 32

14:00 30 30

15:00 28 27

16:00 35 34

17:00 36 36

18:00 38 38

19:00 38 38

20:00 38 38

21:00 36 36

22:00 38 38

23:00 33 32

Average 32 31.3

Max 41 40

Min 18 17

BAM-1020: Digital SolutionBAM-1020: Digital SolutionBAM-1020: Digital SolutionBAM-1020: Digital Solution

• The BAM can be directly polled by AirVision via a terminal server.

• No 1ug/m3 error in digital data

• AirVision runs a File Import Tool to import data:• Stores data in correct hour of

collection• Data is error checked for 3

consecutive hours

• No need for manual data download• Digital data is downloaded

directly from BAM on hourly basis

• Data editing – quick and easy• No More comparing hourly

data collected by logger to data downloaded from BAM

Things you might need to know for your Things you might need to know for your projectproject

Things you might need to know for your Things you might need to know for your projectproject

• Our network architecture from Central to Site to site devices is simplified since everything is on the same network.

• Most of you will have access through another gateway device (wireless IP, cable modem, etc).

• You will need to use Network Address Translation or Port Forwarding settings in your router to direct traffic from WAN side ports to LAN side IP/ports

• We’re scientists, not network experts, so we rely on support from our DAS vendor, Agilaire, to help us with each project, since every shelter network architecture can be unique.

Router / Switch

LAN IP/Port = 192.168.1.4 : 9881

LAN IP/Port = 192.168.1.5 : 3000

WAN IP/Port = 22.33.44.55 : 9000

WAN IP/Port = 22.33.44.55 : 9001

AirVisionHyperterminal,

iPort, etc

Planning Your Project / Avoiding PitfallsPlanning Your Project / Avoiding PitfallsPlanning Your Project / Avoiding PitfallsPlanning Your Project / Avoiding Pitfalls

• Must have correct firmware in BAM-1020• 3.4.3 or newer• Contact Met-One

• Must have Modbus Interface and correct firmware installed on 8832s • 2.14 or greater• Contact Agilaire

• Must have a block of IP addresses available• Each individual analyzer

requires its own address

• All else fails, contact Agilaire