ObservAir
Operating Manual
Distributed Sensing Technologies
Released:
November 1, 2020
Version:
1.0
© 2020 Distributed Sensing Technologies, LLC
1
ObservAir
®
Operating Manual
Table of Contents
1.
Introduction .............................................................................................. 3
1.1.
Principle of operation .................................................................................... 4
1.1.1.
Aerosol absorption photometer (Black carbon) ............................ 4
1.1.2.
Electrochemical cells (Gaseous pollutants) .................................... 6
1.2.
Environmental compensation .................................................................... 7
1.3.
Base package contents ................................................................................. 8
2.
Technical Specifications ......................................................................... 9
2.1.
General specifications ................................................................................... 9
2.2.
Measurement performance ..................................................................... 10
2.3.
Operational limits and warnings ............................................................ 11
3.
Operating Instructions .......................................................................... 13
3.1.
Hardware overview ....................................................................................... 13
3.2.
Interactive LED button: Sensor display and control ...................... 14
3.2.1.
Sensor startup .......................................................................................... 15
3.2.2.
Default LED mode: Pollutant concentration display ................ 15
3.2.3.
Sensor menu Interface ......................................................................... 15
3.2.4.
Attenuation reset ..................................................................................... 16
3.2.5.
Sensor shutdown ..................................................................................... 16
3.2.6.
Sensor alarms and errors .................................................................... 16
3.3.
Filter tab replacement ................................................................................ 17
3.4.
Battery charging ........................................................................................... 18
3.5.
Data collection from onboard SD card ............................................... 19
3.5.1.
Settings file ................................................................................................ 19
3.5.2.
Data file ....................................................................................................... 21
3.6.
Computer (serial USB) connection ....................................................... 22
3.6.1.
Connecting to Arduino Serial Monitor ............................................ 22
3.6.2.
Serial data collection ............................................................................. 23
3.6.3.
Sensor configuration: Serial commands ....................................... 23
3.7.
WiFi connection ............................................................................................. 25
3.8.
Firmware updates ........................................................................................ 26