16
SYSTEM
The rain gauge locks in place using two pegs on the side of the rain gauge funnel. Follow the
steps below to get inside the rain gauge.
1. Press down against the spring and turn counter clockwise slightly.
Look for the graphic on the side of the rain gauge.
ATTENTION: BE CAREFUL TO UNPLUG THE PYRANOMETER CONNECTOR INSIDE THE FUNNEL BEFORE FULLY
REMOVING THE FUNNEL.
2. Before replacing the cover, be sure to reattach the pyranometer connector as follows:
a. Insert the white female connector into the black male plug (check plug direction).
b. Check to be sure the downspout screen is in place on the water exit.
This keeps bugs out of the interior of the sensor.
3.6 TEMPERATURE SENSOR
The ATMOS 41 temperature measurement (
) is in the center of the anemometer
area where a small stainless steel needle containing a tiny temperature sensor (thermistor)
extends from the middle of the four sonic transducers. Unlike most air temperature
measurements, the weather station sensor is not covered with louvered plates to protect
from solar heating. Instead, it sits in open air, susceptible to solar heating of the instrument
body. However, the ATMOS 41 calculates the air temperature accurately because solar
radiation and the wind speed are known. These are the two main parameters that determine
the error between measured air temperature and the actual air temperature. Therefore, it is
possible to solve the energy balance to get what the actual temperature should be based on
the solar load of the body and the convective cooling of that temperature sensor.
Figure 7 Temperature sensor
Temperature sensor
