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TURKEY AWOS TRAINING 1.0 / ALANYA 2005 TRAINING COURSE ON AUTOMATED WEATHER OBSERVING SYSTEMS ( AWOS ) MODULE C.1: DATA ACQUISITION SYSTEM SONER KARATAŞ ELECTRONIC OBSERVING SYTEMS DIVISION TURKISH STATE METEOROLOGICAL SERVICE. DATA ACQUISITION SYSTEM. INTRODUCTION.
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TRAINING COURSE ON
AUTOMATED WEATHER OBSERVING SYSTEMS
( AWOS )
MODULE C.1: DATA ACQUISITION SYSTEM
ELECTRONIC OBSERVING SYTEMS DIVISION
TURKISH STATE METEOROLOGICAL SERVICE
Sensor Output Characteristics
Depending on their output characteristics,
sensors can be classified as
The most common sensor output is in the
form of voltage, current, charge, resistance,
or capacitance. Signal conditioning further
converts these basic signals into voltage
The principle of operation is to measure the resistance of a platinum element. The most common type (PT100) has a resistance of 100 ohms at 0 C and 138.4 ohms at 100 C.
Sensors with parallel digital signal outputs
with information contained in a bit or group
of bits, and sensors with pulse or frequent
Sensors including a microprocessorperforming
basic data acquisition andprocessing functions
and providing anoutput in serial digital or
Transmissometer ( *RVR ) :
* Runway Visual Range
The core of an AWOSis the CentralProcessingSystem
( CPS ).Ingeneral, the main functions of the CPS are
data acquisition, data processing, data storage, and
In general, the data acquisition
hardware is composed of:
(b) Data acquisition electronics with analogue
and digital input channels and ports, scanning,
and data conversion equipment to enter the
signals into the CPS memory.
techniques are available.
a data acquisition system will includeunwanted
effective in reducing electromagnetic coupling.
When an AWOS can be subject to unintentional highvoltage inputs, the installation of a protection mechanism is indispensable to avoid possible destruction of the equipment.
DATA ACQUISITION SYSTEM
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