AOUL65 horn antenna radar

AOUL65 Horn antenna radar

Launch angle: 6 degrees, 8 degrees, and 9 degrees

Signal strength: strong moderate weak

Small installation flange: DN125DN100DN80

Afraid of moisture and condensation

The signal is relatively strong among various types of antennas

Reduce the solid measurement range by half

Reduce the dust measurement range by two-thirds

For example:

Measuring a solid of 5 meters, 5 * 2=10 meters

If the measuring range is selected as 30 meters, the factory label will be 5 meters. If 7 meters are selected, there may be risks on site

Measuring dust for 12 meters, 12 * 3=36 meters

The range should be selected as 70 meters.

Frequency 26GHz

Measuring distance 70307 meters

Resolution 1mm

Accuracy ± 10mm

Return deviation ± 5mm

Blind spot 0.6m

Measurement interval ≥ 1s, according to the set parameters

Response speed ≥ 5s, according to the set parameters

Beam angle<8 °

Size (excluding flange) 120 * 94 * 320mm

Install flange DN50, DN80, DN100, DN150

Process temperature -40 ℃ -85 ℃

Process pressure and atmospheric pressure

Relative humidity<95% RH

Antenna material PTFE

Power supply 16-36VDC two-wire/four wire system (HART), 9-24VDC four wire system (RS485)

Signal output HART/4-20mA/RS485

Fault output remains unchanged at 22mA/20.5mA/4mA

Large load 500 Ω

Communication HART/RS485

On site display LCD panel

Protection level IP67

Cable entrance M20x1.5

Recommended cable AWG18 or 0.75mm2 cable

Suitable for external measurements of containers, storage tanks, warehouses, etc. with complex process conditions, and not affected by changes in the physical properties of the measured medium, the two-wire technology is suitable for explosion-proof applications. The pulse type Level gauge for non-contact and continuous measurement has a large measurement distance of 70m.

1、 Features and advantages:

Two wire technology is an excellent alternative product for differential pressure instruments, magnetostrictive instruments, radio frequency admittance instruments, and magnetic flap instruments.

Not affected by pressure changes, vacuum, temperature changes, inert gases, smoke, steam and other environmental factors

Easy to install, sturdy and durable, maintenance free

HART communication protocol and Foundation fieldbus protocol, easy calibration, and convenient on-site calibration operation through digital LCD display. Simple configuration settings and programming are achieved through software AOPF

Sensitive measurement and fast refresh rate.

Suitable for high temperature conditions, with a process temperature of up to 200 ℃, and can reach 350 ℃ when using a high-temperature extension antenna.

2、 Application medium:

The AOUL60 series radar level gauge is suitable for non-contact continuous measurement of the level of liquids, slurries, and particulate materials, and is suitable for large temperature and pressure changes; In situations where inert gases and volatiles are present.

The measurement method adopts microwave pulses and can operate normally within the industrial frequency range. The beam energy is low and can be installed in various metal and non-metal containers or pipelines, without causing harm to the human body and the environment.

3、 Measurement principle

Short microwave pulses with low emission energy are transmitted and received through an antenna system. Radar waves travel at the speed of light. The running time can be converted into level signals through electronic components. A special time extension method can ensure stable and effective measurements in a short period of time.

Even in complex working conditions where false echoes exist, new microprocessing techniques and debugging software can accurately analyze the echoes of the material level.

input

The antenna receives the reflected microwave pulse and transmits it to the electronic circuit. The microprocessor processes this signal and identifies the echo generated by the microwave pulse on the surface of the material. The correct recognition of echo signals is completed by intelligent software, with an accuracy of up to millimeter level. 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

output

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

Radar level gauge output calculation:

At the factory, it defaults to height measurement mode

For example: range of 50 meters, blind spot of 0.6 meters

Then there are:

When the material level is at 0 height, the meter displays 50 meters and outputs 4 milliamps

When the material level is 49.4 meters, the meter displays 0.6 meters and outputs 20 milliamps

Calculation formula for milliampere output:

Factory default

Milliampere output=20- (display value blind zone)/(range blind zone) * 16

Header display=Range - Material height

Example: Range of 30 meters, blind spot of 0.6 meters

Then there are:

When the material level is 10 meters high, the display shows 20 meters,

Output 9.442mAh

30-10=20

20-（20-0.6）/(30-0.6)  *16=9.442

When the material level is 20 meters, the display shows 10 meters,

Output 14.884mAh

30-20=10

20-（10-0.6）/(30-0.6)  *16=14.884

Example: Range of 30 meters, blind spot of 0.6 meters

How can DCS or instruments be set up to display?

4 milliamps correspond to a material height of 0 meters at position 0

20mA corresponds to the material height of (range blind zone)

30-0.6=29.6 meters

The distance display is based on the installation reference point as a reference

Milliampere output is based on blind spots as a reference

This is the customary way in which radar differs from other products.

The above picture shows a protective cover antenna,

Choose dust-proof antenna

It can significantly improve the dust prevention effect

Add dust-proof loudspeaker antenna

The signal will weaken

Compared to regular horn antennas

The range needs to be reduced by 25%

Of course, apart from the dust-proof antenna

To solve the dust prevention problem, you can choose one with a blowing device

Priority should be given to using the blowdown method if conditions permit on site, as this method will not weaken the signal.

Explosion proof shell: