TH02 Datasheet, PDF (9/26 Pages) List of Unclassifed Manufacturers – D IGITAL I 2C H UMIDITY AND TEMPERATURE S ENSOR

TH02
2.2. Relative Humidity Sensor Accuracy
To determine the accuracy of a relative humidity sensor, it is placed in a temperature and humidity controlled
chamber. The temperature is set to a convenient fixed value (typically 30 °C) and the relative humidity is swept
from 20 to 80% and back to 20% in the following steps: 20% – 40% – 60% – 80% – 80% – 60% – 40% – 20%. At
each set-point, the chamber is allowed to settle for a period of 30 minutes before a reading is taken from the
sensor. Prior to the sweep, the device is allowed to stabilize to 50%RH. The solid top and bottom (blue) trace in
Figure 2, “Measuring Sensor Accuracy Including Hysteresis,” shows the result of a typical sweep after non-linearity
compensation.
Figure 2. Measuring Sensor Accuracy Including Hysteresis
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