3.5.2. Enclosure Mounting ....................................................... 23
3.5.3. Solar Power Kit ............................................................. 25
3.5.4. Mounting Panels to Bracket............................................ 26
3.6. Data collection from onboard SD card ................................ 27
3.6.1. Settings file ................................................................... 27
3.6.2. Data file ........................................................................ 31
3.7. Cloud Dashboard Interface (WiFi or LTE) ............................. 31
3.8. Computer (serial USB) connection ...................................... 32
3.8.1. Connecting to Arduino Serial Monitor .............................. 32
3.8.2. Serial data collection ..................................................... 33
3.8.3. Sensor configuration: Serial commands .......................... 34
3.9. WiFi connection ................................................................. 35
3.10. Firmware Updates ............................................................. 36
3.11. External sample lines ........................................................ 36
4. Data Calibration and Correction Procedures .............................. 36
4.1. Calibration: Black carbon ................................................... 36
4.2. Calibration: Gaseous pollutants .......................................... 37
4.3. Flow rate calibration .......................................................... 39
4.4. Black carbon correction: Filter loading ................................ 39
5. Best Practices ......................................................................... 41
5.1. Filter replacement ............................................................. 41
5.2. Leak check ....................................................................... 41
5.3. Flow rate setting: Filter life vs. BC resolution ....................... 42
5.4. Operational settings for common applications ..................... 44
5.5. Indoor/Outdoor monitoring guidelines ................................ 46
5.6. Accurate sample flow rate measurements are critical........... 47
6. Troubleshooting ....................................................................... 47
6.1. LED error codes ................................................................ 47
6.2. Unresponsive sensor ......................................................... 48
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