Measurement principle
Emission energy very low very short microwave pulse through the antenna system are transmitted and received. Radar wave speed. operation
Time can through the electronic component is converted to a level signal. A special kind of time extension method can ensure that extremely short time
In between the stable and accurate measurement.
Even if the condition is more complex, has false echo, with the newest micro processing technology and debugging the software can also
Accurate analysis out level echo.
input
Antenna receiving the reflection of the microwave pulse and its transmission electronic circuit, microprocessor to signal processing, the identify micro pulse in the material surface produced by the echo. The correct echo letter
Number recognition by intelligent software, precision can reach millimeter level. Distance material surface distance D and pulse time stroke T is proportional to the:
D = C × T / 2
The C for the speed of light
Because the distance of empty cans E known, the level L for:
L = E - D
output
Through the input air tank height E (= zero), full tank height F (= full scale) and some application parameters to set, application parameters will automatically make instrument to adapt to the measurement environment. Corresponding to the four - 20 ma output