Vaisala WXT510 Instrukcja Użytkownika Pobierz pdf (Strona 2)

Vaisala Instruments Catalog 2005

Ref. B210435en rev. A

WEATHER MULTI-SENSOR

135

Wind measurement

Both wind speed and direction are

measured using the advanced Vaisala

WINDCAP® Sensor. The sensor uses

ultrasound to determine horizontal

wind speed and direction. The array of

three equally spaced ultrasonic

transducers on a horizontal plane is an

ideal, Vaisala proprietary design. The

design ensures accurate wind

measurement from all wind directions,

without blind angles or corrupted

readings.

The wind sensor has no moving parts,

which makes it maintenance free. The

measurement range for wind speed is

from 0 to 60 m/s and for wind direction

from 0 to 360°.

Precipitation measurement

The precipitation measurement is

based on the Vaisala RAINCAP® Sensor,

which detects the impact of individual

rain drops. The signals exerting from the

impacts are proportional to the volume

of the drops. Hence, the signal from

each drop can be converted directly to

the accumulated rainfall.

Compared to traditional precipitation

gauges, the Vaisala RAINCAP® Sensor

gives more detailed information about

precipitation. The WXT510 measures

accumulated rainfall, rain intensity and

duration of the rain — all in real time.

Due to the measurement method,

flooding, clogging as well as wetting and

evaporation losses in rain measurement

are eliminated.

The Vaisala RAINCAP® Sensor is the

only maintenance-free precipitation

sensor on the market.

The WXT510 measures accumulated rain

fall, rain intensity and duration of the rain

in real time.

The patented ultrasonic based Vaisala

WINDCAP® Sensor ensures accurate wind

measurement from all wind directions.

Barometric pressure, temperature and

humidity sensors are combined in an

advanced PTU module placed inside the

specially designed radiation shield.

PTU module for barometric

pressure, temperature and

humidity

Barometric pressure, temperature and

humidity measurements are combined

in an advanced PTU module utilizing

capacitive measurement method for

each parameter.

Barometric pressure is measured using

the silicon-based Vaisala BAROCAP®

Sensor. The sensor has minimal

hysteresis and excellent repeatability, as

well as outstanding temperature and

long-term stability. The measurement

range for pressure is from 600 to 1100

hPa.

Temperature measurement is based on

the ceramic Vaisala THERMOCAP®

Sensor. The measurement range is from

-52 to +60 °C.

Humidity measurement is based on the

Vaisala HUMICAP® technology. The

Vaisala HUMICAP® Sensor is highly

accurate and it offers excellent long-

term stability in a wide range of

environments and negligible hysteresis.

The measurement range for humidity is

0...100 %RH.

The whole PTU module is replaceable

and available as a spare part.

The PTU module is mounted in a

specially designed radiation shield. The

shield protects the sensors from both

scattered and direct solar radiation and

precipitation. The plastic material in the

plates offers excellent thermal

characteristics and UV stabilized

construction. The white outer surface

reflects radiation, while the black inside

absorbs accumulated heat.

Accurate and Stable Measurement

WXT510

WEATHER_2005_GLOBAL.PMD 7.12.2004, 7:40135

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