Note:
If you have a reliable source to calibrate the CO2 data,
you may calibrate the offset on the web page (ecowitt.net)
or the WS View Plus/ Ecowitt App(for the WiFi
Gateway/GW1100/WN1900 only), or the HP2551
/HP3500/HP3501 console. If the deviation is large, it's
recommended to place the sensor in an outdoor ventilated
place for 30 minutes before calibrating.
PM2.5: It is not possible to calibrate on the sensor side,
and you can calibrate through the web page (ecowitt.net)
or WS View Plus/ Ecowitt App when paired with the
WiFi
Gateway/GW1100 or on the console when pairedwith HP
2551/HP3500/HP3501, which saves the offset value on
the gateway side before sending data to www.ecowitt.net
server. However if PM2.5 data is persistently low, it can
be that there is a spider net going inside the sensor. So
please clean the sensor from time to time to see if there is
any sign of spider penetration.
Note: If the battery level is lower than 4 bars, calibration
is prohibited. When the led light on the sensor is steady
for 3 seconds, it indicates that calibration is prohibited.
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