2FD/2FF/2FG
2-1-14
(2) Computing the absolute humidity
The humidity sensor (HUMSENS) converts the relative humidity detected by the humidity sensing element into a voltage
and sends it to the main PCB (MPCB). The main PCB (MPCB) computes the absolute humidity based on this HUMSENS
signal and the temperature (ETTH signal) detected by the external temperature thermistor (ETTH).
HUMPCB
MPCB
HUMSENS
3 HUMSENS
4 5 V DC
YC16-B10
YC16-B9
YC16-B8
YC16-B7
1
2
ETTH
ETTH
GND
Humidity
sensing element
Figure 2-1-17 Absolute humidity computation block diagram
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