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Q. Q When and why do I calibrate the HAQQ.
Q. A The HAQ CO2 sensor is calibrated at the factory, but may drift over time. To combat this, the HAQ should be calibrated on
occasion to account for the drift. Calibration involves exposing the sensor to a known gas source (outdoor air, or indoor air
in an unoccupied room - both should equal approximately 400 ppm CO2). The HAQ takes multiple readings, calculates an
average, stores the difference between the new average and original factory value in memory (after subtracting 400 from
the known gas source), and uses this value as an "offset." This "offset" value is then automatically added or subtracted to any
subsequent readings taken by the sensor during use until the next calibration.
Q. Q What are the steps to recalibrate the device?
Q. A In the outdoor environment, switch to the CO2 interface, press and hold the middle position of the screen for 3 seconds, and
the calibration prompt appears. After 10~15 minutes, when the calibration prompt disappears, the calibration is complete.
Q. Q What is the optimum placement of the device?
Q. A Ideally the device should be close to where you or the end consumers are, and should not be near doors, or windows as
they affect the air flow around it. Placing it near an open window might give different readings as the air might not have
dissipated homogeneously through the room.
For best results we suggest using one device for 1000 – 1500 sq ft of air, or for one room in a house, as walls and doorways
act as barriers.
Q. Q Can I use this in my car?
Q. A Yes! As long as your battery is charged or as long as you have a connection for a USB cable – you can use this device in your
car to understand the in-cabin air quality!
Do note that for data logging you would need an internet connection so it can upload data to the app, you might use your
phone as a hotspot, or the device as a standalone monitor.
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FAQS
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