Topcon A3280 installation manual Relative Humidity, Delta T

Weather Station Operation/Installation Manual

Relative Humidity

Relative Humidity is measured from the humidity sensor located on the base of the sensor.

Delta T

Delta T is calculated by the X20 Guidance software, from the temperature and relative humidity readings sent from the Weather Station sensor.

Temperature

Temperature is measured using the 3 ultra-sonic sensors on the Weather Station to measure the speed of sound. Speed of sound is affected by temperature, therefore temperature is calculated by measuring the speed of sound between the sensors.

TIP

For best results a slight flow of air is required to give an accurate temperature reading.

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