TR50 - User Guide 74
6.2 Temperature and Humidity Standard
The manufacturer already calibrates the temperature and Humidity sensor; it
doesn't need re-calibration in its life year.
TR50 offers manual temperature and humidity sensor correction options. After the
TR50 device is powered on for more than 60 mintues, record the temperature and
humidity value continuously for the next 30 minutes, then use the synchronous
average value for correction with offset parameters.
6.3 C0
2
Calibration Standard
The manufacturer already calibrates the CO
2
sensor. The CO
2
sensor includes two
field calibration features, FRC and ASC, to realize high initial and long-term
accuracy. Forced recalibration (FRC) enables restoring the highest accuracy with
the assistance of a CO
2
reference value immediately. FRC is typically applied to
compensate for drifts originating from the sensor assembly process,
transportation, or other extensive stresses. Automatic self-calibration (ASC)
ensures the highest long-term stability of the CO
2
sensor without the need for
manual action steps from the user. The automatic self-calibration algorithm
assumes that the sensor is exposed to an atmospheric CO
2
concentration of
400 ppm at least once per week.
TR50 offers manual CO
2
sensor correction options. After the TR50 device is
powered on for more than 30 mintues, record the CO
2
value continuously for the
next 30 minutes, then use the synchronous average value for correction with offset
parameters.
7 cfgCO2SensorOffset
Offset for CO2 sensor, TR50 will provide the final
value.
Tips of configuring cfgCO2SensorOffset:
1. There must be an interval of 3 minutes between
the two times calibrations of CO2 written into TR50,
and less than this interval writing operation will
cause failure.
2. TR50 can only accept the CO2 sensor offset value
which meets requirement that CO2 sensor reading +
offset value > 400ppm
# Configuration Items Comments
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