Introduction; Installing The Weather Station; Site Requirements And Considerations - RainWise PVMET-330 User Manual

Introduction

The PVmet-330 weather station is a compact and economical solution for third-party
agricultural weather monitoring. It measures ambient air temperature, relative humidity,
barometric pressure, wind speed and direction and is capable of measuring rainfall, soil
or other peripheral temperature and global irradiance. The PVmet-330 uses a 2-wire half
duplex RS-485 serial port for Modbus RTU communication with a host.

Installing the Weather Station

It is suggested that the system be operated at ground level to make sure that all
components are working properly prior to installation.
If any of the components are damaged or malfunctioning upon receipt, RainWise should
be contacted.

Site Requirements and Considerations

Ambient air temperature, global irradiance, and wind speed and direction can be affected
by obstructions and local topography. Each site is different and presents challenges in its
own unique way. Any object, in excess of 10° above the horizontal plane, must not block
the global irradiance sensor. The PVMET-330 sensor assembly, which contains the
ambient air temperature and wind speed and direction sensor, should be no closer than 10
times any obstruction's height and should be placed away from any dark, heat-absorbing
surface.
When roof-mounting the sensor assembly, the unit should be mounted toward an edge of
the roof preferably on the prevailing wind side of the building and should be at least 2-1/2
feet above the roofline. Avoid locating the station near any heat sources such as chimneys
or vents.
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