2
ObservAir
Operating Manual
3.9.
External sample lines .................................................................................. 26
4.
Maintenance and Calibration Procedures .......................................... 27
4.1.
Zero calibration of pollution sensors ................................................... 27
4.2.
Span calibration of pollution sensors .................................................. 27
4.3.
Flow rate calibration .................................................................................... 28
4.4.
Leak check ....................................................................................................... 28
5.
Best Practices ........................................................................................ 30
5.1.
Filter replacement ........................................................................................ 30
5.2.
Filter loading correction ............................................................................. 30
5.3.
Flow rate setting: Filter life vs. BC resolution ................................... 31
5.4.
Operational settings for common applications ............................... 34
5.5.
Indoor/Outdoor monitoring guidelines ............................................... 36
5.6.
Accurate sample flow rate measurements are critical ................. 36
6.
Troubleshooting ..................................................................................... 37
6.1.
LED error codes ............................................................................................ 37
6.2.
Unresponsive sensor ................................................................................... 37
3
ObservAir
®
Operating Manual
1.
Introduction
The ObservAir is an air quality sensing platform that provides accurate
pollutant concentration measurements in real time. Key features include:
•
Modular:
The ObservAir is centered around a black carbon (BC) sensor,
and can optionally monitor up to two of the following six gaseous
pollutants: CO, NO
2
, SO
2
, O
3
, H
2
S, and ethanol.
•
Portable:
The lightweight (600g) and compact (120x80x45 mm)
ObservAir is easily deployed in both stationary and mobile monitoring
applications.
•
Connected:
All ObservAir units support WiFi and USB communication
protocols, and include a 16GB removable SD card for onboard data
storage. Units may also be supplemented with an LTE, LoRa, or SigFox
communication module and a GPS unit for location logging. An
integrated mobile app and optional data backend services enable real-
time air quality monitoring, sensor diagnostics, and data collection.
•
Accuracy anywhere:
Using DST’s proprietary environmental
compensation algorithms, each ObservAir is individually ‘trained’ to
maintain measurement accuracy even in harsh operating environments
(e.g. outdoors) where existing air quality instruments typically suffer.
•
Network-ready:
With a 24-hour battery life, flexible wireless
communication options, and environmental compensation, the
ObservAir is ready for networked deployments at a moment’s notice.
•
Flexible:
Accessories are available to enable a wide range of monitoring
applications: Solar panels for extended stationary measurements,
mounting
and
packaging
solutions
for
mobile
platforms,
environmentally controlled enclosures for harsh environments, etc.
The ObservAir is designed to be easily deployed anywhere, and trusted to
deliver accurate air quality measurements reliably and conveniently. If you
have any questions about integrating the ObservAir into your air quality
monitoring efforts, please contact us at
.