Description

ZSRD70X Guided Wave Radar Explosion-proof Magnetic Level meter is a measuring instrument based on the principle of time travel. The radar wave runs at the speed of light, and the running time can be converted into a level signal by electronic components. The probe sends out high-frequency pulses and propagates along the cable or rod probe. When the pulses meet the surface of the material, they are reflected back and received by the receiver in the meter, and the distance signal is converted into a level signal.

The reflected pulse signal is transmitted to the electronic circuit part of the instrument along the cable or rod probe. The microprocessor processes this signal to identify the echo generated by the microwave pulse on the surface of the material. The correct echo signal identification is completed by the pulse software, and the distance D from the surface of the material 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 level L is:

L=E-D

By entering the empty tank height E (=zero point), the tank is full

Height F (= full scale) and some application parameters

Setting, application parameters will automatically make the meter adapt to the measurement

Quantity environment, corresponding to 4-20mA output.

Measuring range:

H----Measuring range

L----empty tank distance

B----top blind zone

E----Minimum distance from probe to tank wall

The top blind zone refers to the minimum distance between the highest material surface of the material and the measurement reference point.

The bottom blind zone refers to a distance near the bottom of the cable that cannot be accurately measured.

There is a finite measurement distance between the top blind zone and the bottom blind zone.

INTRODUCTION

1.1 Application function

RD800X77-81GHz FM FMCW radar products (also known as millimeter wave radar), because it adopts higher than Ku band radar frequency millimeter wave band, in the remote target detection, strong smoke dust environment, long distance.

What is millimeter wave electromagnetic wave: usually 30-300GHz frequency domain(wavelength is 1~10 mm) electromagnetic wave called millimeter wave, it is located in the microwave and far infrared wave overlapping wavelength range, so it has the characteristics of two spectra. The 77-81GHz band of this product is the least understood and developed region, with the following features.

● Good transient performance: the pulse width of this band can be narrow in sub-picosecond (ps) level, so it can be used for time-resolved study of various materials, measuring the molecular structure; through the sampling measurement technology, can effectively suppress the interference of far red background noise.

● There is a very wide broadband: this band pulse source usually only needs a few cycles of electromagnetic wave shock, and many biological macromolecular vibration and rotational energy level, dielectric, semiconductor, superconducting, thin film material molecular vibration level of the band close to. Therefore, this band spectrum can be used as an effective means to detect the material information in the millimeter wave band, which is very suitable for measuring the material absorption spectrum, and can be used for qualitative identification applications.

● Coherence: dipole oscillation driven by coherent current or nonlinear differential frequency effect of coherent laser pulse;

● Low energy: millimeter wave photon energy is only a few millielectron volt, there will be no X-ray ionization and destruction of the substance to be detected, so it is not easy to destroy the substance to be detected.

● Strong penetration: with a strong penetration force for nonpolar substances, many non-metallic nonpolar materials have little ray absorption of this band, so it can be used to detect the internal structure of the material. For example, ceramics / cardboard / plastic

products / foam are transparent to this band electromagnetic radiation, and can also be used for airport / station safety monitoring, such as exploring machinery / explosives and drugs, or for circuit board welding detection.

Radar Bit Meter

● Easy to be absorbed by polar molecules: this band has less scattering in the non-uniform substances, and can detect and measure the water vapor content. They can also be studied by analyzing their characteristic profiles or by conducting quality control.

As a 78GHz band radar used in the field of industrial measurement, high precision and non-contact level and liquid level measurement has the incomparable advantages of other ordinary microwave pulse radar and guided wave radar. Its extremely narrow beam and penetration ability can be more adapt to super complex working conditions without weakening the measurement performance.

1.2 RD800X Products suitable for the application field

● The product electromagnetic wave emission angle is less than 3°, which is suitable for narrow space or guide wave pipeline measurement

● The product can reach a 120M measurement range, suitable for the measurement of a very large storage tank

● Product measurement blind area in 7-8CM range, suitable for small storage tanks

● The product has extremely high measurement accuracy, suitable for high precision measurement

● The product has rich echo processing algorithm and experience data of various operating conditions, mixing and heating rod.

1.3 RD800X Product features

● 77GHz-81GHz FM wave radar

● 5GHz super-large FM scanning frequency width, wide application surface

● Standard HART, RS485 / MODBUS bus protocol is supported

● Support the upper machine setting software, tank side table and other operating modes

● 24VDC power supply

● Simple installation structure, adapted to various installation forms on site

SPECIFICATIONS