Thermoanemometer - air velocity meter, model TA20 with probe STA300
The thermoanemometer model TA20 is a digital measuring meter designed for determining air speed and temperature. It is applied in air-conditioning and ventilation for determining air speed in ventilation ducts, as well as in industrial processes measurements. The measuring ranges from 0.4 ÷ 40 m/s within the temperature range of 0 ÷ 260 °C. The probe design allows for measurements under varied conditions, also in aggressive environments. The measured speed and temperature value is presented on the large liquid crystal 7 segment display, with 25 mm digits high. Meter is supplied from built-in accumulators or by external power supply adaptor.
The meter measuring part, probe STA300
The measuring circuit of the meter is a constant temperature anemometric bridge, with platinum speed and temperature sensors. The meter is fitted with an accurate bridge temperature setoff device, ensuring independent speed indications within a wide range of temperature variations in flow. This feature distinguishes the described meter from devices offered by other manufacturers.
The STA300 probe is made of acid-resistant steel and plastics immune to the temperature and the influence of aggressive substances. Two platinum cylindrical sensors were used for the measurement of the speed and the temperature resistive located on against of oneself in guaranteeing the distance the undisturbed measurement.
The length of the probe is being established by the user and he can take out from 0.5 up to 3 metres. Standard lengths of measuring probes amount 1, 2 and 3 metres. Along the probe a metric scale thanks to which the user knows location the measuring point is brought a lot.
Together with the device software for computers working at Windows98/ME/2000/XP operating systems is being provided. The software is enabling the monitoring of current value of the speed and temperatures, on the screen presented there are also graphs of momentary value. A computer program permits the user morover for updating the inside device software (firmware), to this purpose the user should download via Internet current versions of the software, to install and to start on a computer, to connect the device and to spend recommending the updating the internal program of measure. This function is very useful in case of the appearance of the mistake in the software, then a need to send the device for the producer back isn't occurring.
|velocity, m/s||0,4 ÷ 40|
|temperature, °C||0 ÷ 260|
|expanded uncertainty, 95%|
|velocity, m/s||± (0,15 + 4% of measured value)|
|temperature, °C||± 0,15|
|DC voltage, V||9|
|dimension (height x width x length), mm||211 x 100 x 26|
|weight without probe and external power supply, kg||0,45|
Current version of the software for model TA20 TA20 version 2.02