User manual

1-Wire Application Guide v1.04 Page 21 of 41
Table 3 ADS Wind Direction Conversion (Sorted by Voltage)
Direction Voltage
W 0.89-0.95
NW 1.54-1.60
WNW 2.20-2.26
N 2.66-2.72
NNW 3.54-3.60
SW 4.28-4.34
WSW 4.59-4.65
NE 5.96-6.02
NNE 6.49-6.55
S 7.57-7.63
SSW 7.95-8.01
SE 8.48-8.54
SSE 8.98-9.04
E 9.27-9.33
ENE 9.35-9.41
ESE 9.50-9.56
3.6 Humidity Sensor
Figure 13 1-Wire Humidity Sensor
All 1-Wire humidity sensors are based on the original design shown in Figure 13.
Variations over time have occurred since Honeywell has discontinued the original
HIH3610 humidity sensor and replaced it with the HIH4000 and later with the
HIH402x variations.
The humidity sensor produces a voltage proportional to the Relative Humidity,
which is then read by the DS2438 ADC and converted to digital format.
Care needs to be taken with placing these sensors outdoors since the Honeywell
HIH3610 and HIH4000 sensors will fail over time if exposed to condensing
humidity environments. Honeywell produced the HIH4021 sensor, which is
sealed, to avoid these failures.