Radar level meter is a universal radar level meter, which is a measuring instrument based on the time-travel principle. Radar wave runs at the speed of light, and the running time can be converted into level signals through electronic components. The probe sends out a high-frequency pulse that travels along the cable. When the pulse hits the material surface, it is reflected back to the receiver in the meter, which converts the distance signal into a level signal.

The radar level meter transmits very short microwave pulses of very low energy through the antenna system and receives them. Radar waves travel at the speed of light. The running time can be converted into level signals by electronic components. A special time extension method ensures stable and accurate measurements in a very short time.

Even if there is false echo under complex conditions, the echo of object level can be accurately analyzed with the latest microprocessing technology and debugging software.

input

The antenna receives the reflected microwave pulse and transmits it to an electronic circuit. The microprocessor processes the signal and recognizes the echo produced by the micropulse on the surface of the material. The correct echo signal recognition is accomplished by intelligent software, and the accuracy can reach millimetre level. The distance D from the material surface is proportional to the time travel T of the pulse:

D = C * T / 2

Where C is the speed of light

Since the distance E of the empty tank is known, the object level L is:

L=E-D

output

By inputting empty tank height E (= zero), full tank height F (= full range) and some application parameters to set, application parameters will automatically make the instrument adapt to the measuring environment. Corresponds to 4-20mA output.

Application medium:

Intelligent radar level meter is suitable for non-contact continuous measurement of liquid, slurry and particle level, suitable for large changes in temperature and pressure; Where inert gases and volatiles are present.

Using microwave pulse measurement method, and can work in the range of industrial frequency band. Beam energy is low, can be installed in a variety of metal, non-metal containers or pipelines, no harm to the human body and the environment.

Installation instructions

(1) From the wall to the outer wall of the installation of the short pipe: the distance from the tank wall is 1/6 of the diameter of the tank, and the minimum distance is 200mm.

(2) can not be installed above the feeding port

(3) It cannot be installed in the central position. If it is installed in the central position, multiple false echoes will be generated, and interference echoes will lead to signal loss.

(4) The diameter of the nozzle should be less than or equal to the length of the shield tube (100mm or 250mm).

The measurement method is based on the radar level meter based on the principle of time domain reflection (TDR). Part of the pulse of the radar level meter is reflected to form echo and return along the same path. However, considering the influence of corrosion and adhesion, the final value of the measurement range should be at least 100mm away from the ****** of the antenna. For overspill protection, you can define a section

The radar level gauge flies the safe distance attached to the blind area. *** Small measurement range is related to the antenna. Depending on the concentration, the foam can both absorb and reflect microwaves, but it can be measured under certain conditions. Back to the pulse transmitter.