Data Sheet

6
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HTE501
3 Specifications
3.1 Relative Humidity Sensor
PARAMETER CONDITION(S) MIN TYP MAX UNITS
Operating range 0 100 %RH
Accuracy
1)2)
Periodic mode,
Td < 80 °C
±1.8 See Figure 3 %RH
Hysteresis
2)
±0.9 %RH
Resolution
3)
13 bit 0.02 %RH
Repeatability
4)
13 bit 0.02 %RH
Response time
5)
�
63
5 s
Long term drift
6)
<0.5% %RH/yr
Table 3: Relative humidity sensor
0.0
1.0
2.0
3.0
4.0
5.0
6.0
0 10 20 30 40 50 60 70 80 90 100
+/‐ HumiditiyDeviation[%RH]
Relativeumidity[%RH]
HumidityMeasurementDeviation@25°C
max
typ
± DRH [%]
RH [%]
Figure 3: Humidity measurement accuracy @ 25 °C (incl. hysteresis)
3.2 Temperature Sensor
PARAMETER CONDITION MIN TYP MAX UNIT
Operating Range
7)
Heater OFF -40 135 °C
Accuracy 0.2 See Figure 4 °C
Resolution
8)
13 bit 0.01 °C
Repeatability
4)
13 bit 0.03 °C
Response time
9)
�
63
2 s
Long Term Drift <0.03 °C/yr
Table 4: Temperature sensor parameters
1) In the periodic mode the humidity hysteresis is included. See also chapter 3.3 Recommended Operating Conditions.
2) In the periodic mode the humidity accuracy is within the hysteresis. In the single shot measurement, the humidity hysteresis must be added to the given
humidity accuracy to obtain the overall accuracy.
3) Default resolution is 13 bit temperature / 13 bit humidity. Resolution is changeable with register value.
4) The stated “Noise / Repeatability” is 3 times the standard deviation (3σ) of multiple consecutive measurement values at constant environmental conditions.
5) Time for achieving 63 % of a step function, valid at 25°C and 1 m/s airflow.
The actual response time in application strongly depends on the surrounding of the sensor in the final application (heat conductivity of sensor substrate,
dead volume,…).
6) Value may be higher in environments with vaporized solvents, out-gassing tapes, adhesives, packaging materials, etc. For more details please refer to
the HTE501 Handling Instructions.
7) With the “Heater ON” take care that the sensor temperature does not get higher than the maximum allowed temperature
8) Default resolution is 13 bit temperature / 13 bit humidity. Resolution is changeable with register value.
9) Time for achieving 63 % of a step function, valid at 25°C and 1m/s airflow.
The actual response time in application strongly depends on the surrounding of the sensor in the final application (heat conductivity of sensor substrate,
dead volume, …).