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Jiangsu Aoke Instrument Co., Ltd

E-mail
956754718@qq.com
Phone
15261725556，15161725556
Address
Gongyi Road, Jinhu County Industrial Park, Jiangsu Province

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Powder coal bin level gauge

NegotiableUpdate on 10/27

Model

Nature of the Manufacturer: Producers

Product Category

Place of Origin

Online Consult

Overview

1.1 Level Measurement Solution High frequency Radar Level Gauge (Powder Coal Bunker Level Gauge) is a non-contact high-frequency radar level gauge that uses the pulse principle. It can be widely used to measure the distance, level, volume, weight, and open channel flow of liquids, slurries, and viscous substances. It can also be used to measure solid media such as powders, particles, and blocks

Product Details

1.1 Level measurement solution

High frequency radar level gauge (powder coal bin level gauge) is a non-contact high-frequency radar level gauge that uses the pulse principle. It can be widely used to measure the distance, level, volume, weight, and open channel flow of liquids, slurries, and viscous substances. It can also be used to measure solid media such as powders, particles, and blocks. Even in applications with high dust and agitation, stable measurement can still be achieved.

1.2 Measurement principle

The high-frequency radar level gauge emits extremely narrow and low-energy microwave pulse signals through the antenna. This pulse signal is transmitted at the speed of light in space and reflects off the measured medium. The reflected signal is received by the instrument, and the time interval between the transmitted and received pulse signals is proportional to the distance from the reference plane to the surface of the measured medium. By measuring the time interval between transmission and reception, the distance between the antenna and the surface of the medium can be measured.

1.3 Technical advantages

•Adopting a transmission frequency of up to 26GHz

•High frequency and signal-to-noise ratio are the choices for low dielectric constant media

•Small beam angle, concentrated energy, stronger anti-interference ability, greatly improving measurement accuracy and reliability

•The measurement blind spot is smaller, and excellent results can also be achieved for measuring small cans

•Shorter wavelength for better level measurement of small particle media and inclined media surfaces

•Sensitive measurement, fast refresh rate, small antenna size, easy installation, sturdy and durable, maintenance free

•Non contact measurement,wear-free，pollution-free,Measurable levels of liquid and solid media

•Almost unaffected by temperature, pressure, steam, foam, dust and other complex working conditions

•Adopting a two-wire loop power supply technology, the power supply voltage and output signal are transmitted through a two core cable, saving costs

•Adopting advanced microprocessors and unique echo processing technology, it can be applied to various complex working conditions

•Extremely low transmission power, can be installed in various metal and non-metal containers, and has no harm to the human environment

•A display screen with buttons allows for easy setting of instrument parameters

1.4 Applicable Industries Applicable operating conditions

•Chemical and Petrochemical Industry•Electricity•Other•Intermediate silo•warehouse

•Steel and Metallurgy•Mineral resources•Hopper•tank

•Paper making and pulp•Water and sewage•Process tank•mixing tank

•Food and Beverage•Pharmaceutical•Other

3.1 Technical Parameters

•The technical parameters given below are for general application scenarios. If you need relevant technical parameters for special application scenarios, please contact the manufacturer.

3.2 Characteristic Parameters

construction	The entire measurement system consists of sensors (i.e. antennas) and signal converters, with only an integrated structure
Measuring principle	Kband26GHZ-pulse principle
Measurable medium	Solid and liquid
Basic measurement values	The time difference between the emitted wave and the reflected wave
Additional measurement values	Location, distance, volume, weight, and open channel flow rate
blind spot	Within 0.3m from the end of the antenna
maximum range	Stick style20m(Liquid type) Small horn mouth shape30m(Liquid type) Long horn mouth shape70m(Solid type)	Parabolic type70m(Solid type) Long horn mouth type 30m(Solid type) Sanitary type20m(Liquid type)
	The maximum range depends on the type and size of the antenna, as well as the relative dielectric constant of the measured medium and installation conditions. Please consult the manufacturer for details
The relative dielectric constant (ε) of the measured mediumr）	≥ 1.5
precision	Refer to the accuracy diagram (reference conditions for accuracy indicators follow)JJG971-2002Standard, see table on next page)
Beam angle	Refer to the accuracy diagram (depending on antenna size)
repetitiveness	±1mm
Explosion-proof rating	Exia II CT6； Exd II BT4；
Protection level	IP67
Damping time	Default 1s (adjustable)
Maximum level change	10 m⁄min
display	LCD display (Chinese, English, German), with4A button
Display working temperature	-20℃...+70 ℃ (beyond this temperature range, the LCD display may be damaged)
display resolution	1mm
Transportation and storage temperature	-40℃...100℃
Environmental temperature and humidity	-40℃...+80 ℃ (according to the temperature standard for industrial product components)
relative humidity	<95%
Process temperature and pressure (Process connection)	Bar type -40 ℃...200℃ -0.1...2.5Mpa Small horn mouth -40 ℃...250℃ -0.1...4.0Mpa Long horn mouth -40 ℃...250℃ -0.1...4.0Mpa Parabolic type -40 ℃...250℃ -0.1...4.0Mpa Long horn mouth -40 ℃...250℃ -0.1...4.0Mpa Sanitary type -40 ℃...200 ℃ at standard atmospheric pressure
	It depends on the temperature and pressure levels present simultaneously at the process connection
Thermal shock resistance	＜40℃/s
Vibration resistance	Mechanical vibration 10m/s ², (10~150) Hz

process connection

Process connection size

The size of the process connection opening should be larger than the diameter of the lower end of the antenna

If the process connection is smaller than the size of the antenna, you can:

-After removing the antenna from the instrument panel, install it from inside the container

-Install the instrument on a separate tablet to accommodate larger process connections

threaded connection

Gl½A l½NPT

flange connection

DN50-DN250, PN16/PN40 or consult manufacturer

electrical connection

power supply voltage	Second line standard type:（16...26）V DC Intrinsic safety type:（21.6...26.4）V DC Power consumptionmax 22. 5mA / 1W Allow ripple<100Hz Uss （100...100K)HzUss
power supply voltage	Four wire intrinsic safety+explosion-proof: (22.8)...26.4）V DC / （198...242）V AC Power consumption max 1VA/1W
electrical interface	1 M20 * 1.5 or half NPT cable sealing head 1 blind block
electrical interface	Standard Material: Plastic Optional Material: Stainless Steel 304
Cable specifications	（0.5…1.5）mm²

output parameters

output signal	4...20mA; HART (two-wire/four wire); RS485； Modbus；
Current resolution	± 3uA
communication protocol	HART；I²C；
temperature drift	10ppm /℃
fault signal	Current output remains unchanged (default) ；22 mA；20.5mA；3.9mA；

The reference conditions for accuracy indicators shall followJJG971-2002standard

temperature	+20℃±5℃
pressure	1 standard atmospheric pressure
relative humidity	60%±15%
Tested target object	A metal disk placed in a soundproof darkroom

Instrument material

Instrument casing	aluminium
Shell window	Tempered glass
antenna	Stainless Steel 316L
process connection	Stainless Steel 316L
O-ring	Fluorosilicone gel
heat sink	aluminium Stainless steel 316L;

Instrument weight（specificDepends on the process connection and casing）

model	Stick style	Small horn mouth shape	Long horn mouth shape	Parabolic type	Long horn mouth shape	Sanitary type
weight	1KG	2KG	6KG	7KG	2KG	3KG

5 Installation

5.1 Preparation before installation

Please pay attention to the following items to ensure that the instrument can be installed correctly:

•Please ensure that there are no interfering objects directly below the process connection! Otherwise, it will lead to measurement errors!

•Please reserve sufficient installation space!

•Please avoid strong sunlight on the signal converter and install a protective cover if necessary!

•Please avoid installation environments with strong vibrations!

•Multiple high-frequency radar level gauges can be installed on the same container!

•To ensure fast, convenient, and safe installation of this instrument, please follow the following installation instructions!

5.2 Installation guidance

To avoid measurement errors and instrument malfunctions, please follow the following precautions!

5.3 Basic Requirements

When an antenna emits microwave pulses, there is a certain emission angle. There shall be no obstacles in the area radiated by the microwave emission angle from the lower edge of the thread or flange to the surface of the measured medium. Therefore, during installation, it is advisable to avoid facilities inside the tank as much as possible, such as ladders, limit switches, heating equipment, brackets, etc. If necessary, 'false echo learning' must be performed when the tank is empty. Additionally, it should be noted that the microwave emission angle radiation area must not intersect with the feeding material flow. When installing instruments, it is also important to note that the highest material level must not enter the measurement blind zone of the instrument, and the instrument must be kept at a certain distance from the tank wall. The installation of the instrument should be as perpendicular as possible to the emission direction of the antenna and the surface of the measured medium. Instruments installed in explosion-proof areas must comply with the installation regulations of national explosion-proof hazardous areas. The casing of explosion-proof instruments is made of die cast aluminum material. When explosion-proof instruments are installed in places with explosion-proof requirements, the instruments must be grounded.