Vaisala PTB210 SERIES Instrukcja Obsługi Pobierz pdf (Strona 4)

Abstract

Measurements with the MPI-BGC FTIR system are only possible when the sun is

visible. However, the solar tracker which guides the sunlight into the instrument

has to be protected from precipitation and other adverse environmental conditions.

Therefore the FTIR system needs a weather station to determine if the local weather

conditions are favourable for measurements or if the solar tracker should be pro-

tected.

Figure 1: The BGC-FTIR Weather Station

The main parameters which will be determined are temperature, humidity, solar

radiation, wind speed and precipitation. To increase the reliability of the system,

all of the crucial parameters are measured redundantly with duplicate sensors or

sensors of diﬀerent principle. The redundant sensor principle is also useful to cor-

rect long-term drift of the sensors.

The temperature and the humidity are measured with two compact meteorological

sensors. The wind speed is provided by two cup anemometers with high reliability.

The precipitation is detected by a light barrier and a contact conclusion system.

A pyranometer provides measurements of the global solar radiation. The high pre-

cision pressure measurement is implemented with a digital sensor which provides

maximum accuracy as well as long-term stability. A thermistor and a digital tem-

perature/humidity sensor are used for monitoring the conditions inside container.

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Vaisala PTB210 SERIES Instrukcja Obsługi Strona 4