VP-3
User’s Manual
5. Communication
21
Power
The VP-3 is an extremely low power sensor. When continuously
powered, but not making a measurement or communicating, it
uses 30
A. When using the sensor as part of an SDI-12 bus, it is
recommended that the sensors be excited continuously to avoid
issues with initial sensor startup interfering with the SDI-12
communications.
Reading
When reading the VP-3 in SDI-12 mode, the first number output
by the sensor is vapor pressure in kPa, the second number is
temperature in Celsius, and the third number relative humidity in
a unitless ratio from 0 to 1 (0 – 100%).
