When should I recalibrate? We recommend recalibrating your touchscreen once every two-
three weeks; however, the device can be recalibrated at any time.
What if power is lost? If the device is powered down during calibration, the calibration will need
to be restarted (for a total of 12 hours). If the device is powered down after an initial calibration,
it will restart with the previous baseline values.
Note: On power up, with pre-existing baseline, it may take up to ten minutes before the
VOC sensor warms up and displays accurate values.
What readings are “good” and what are “bad”? Air quality is a big subject and requires a lot of
background knowledge, and even then is pretty complicated. When we were testing the
device, the readings didn’t make sense at first, as the values didn’t seem to correlate to the 3D
printing process, and then we discovered the laser exhaust wasn’t working correctly. The point
here is that the 3D printer is only one source of poor indoor air quality, so keep that in mind
when interpreting the readings.
When the sensor is in the fresh air, it typically reads about 50, so for us, that is the baseline of
“good air.” Some sources suggest that 200 ppb is acceptable, but it's unclear if that is for 24/7
or only occasional exposure. We prefer to err on the side of caution, but the important thing is
to arm yourself with actual measurements.
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